vents 1994 cleft and coaxial segment plume monitoring ... · the blanco fracture zone and on the...

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NOAA Data Report ERL PMEL-58 VENTS 1994 CLEFf AND COAXIAL SEGMENT PLUME MONITORING: PHYSICAL AND CHEMICAL DATA, NOAA SHIPS DISCOVERER AND SURVEYOR AND RN ATLANTIS II, APRIL TO SEPTEMBER 1994 Michael S. Devany Edward T. Baker Richard A. Feely David J. Pashinski Geoffrey T. Lebon Sharon L. Walker Pacific Marine Environmental Laboratory Katherine A. Krogslund School of Oceanography The University of Washington Calvin Mordy Pacific Marine Environmental Laboratory Pacific Marine Environmental Laboratory Seattle, Washington February 1996 UNITED STATES DEPARTMENT OF COMMERCE Ronald H. Brown Secretary NATIONAL OCEANIC AND Environmental Resaardl ATMOSPHERIC ADMINISTRATION Laborator1es D. JAMES BAKER James L Rasmussen Under Secretary for Oceans Director and Atmosphere/Administrator

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Page 1: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

NOAA Data Report ERL PMEL-58

VENTS 1994 CLEFf AND COAXIAL SEGMENT PLUME MONITORING: PHYSICAL AND CHEMICAL DATA, NOAA SHIPS DISCOVERER AND SURVEYOR AND RN ATLANTIS II, APRIL TO SEPTEMBER 1994

Michael S. Devany Edward T. Baker Richard A. Feely David J. Pashinski Geoffrey T. Lebon Sharon L. Walker Pacific Marine Environmental Laboratory

Katherine A. Krogslund School of Oceanography The University of Washington

Calvin Mordy Pacific Marine Environmental Laboratory

Pacific Marine Environmental Laboratory Seattle, Washington February 1996

UNITED STATES DEPARTMENT OF COMMERCE

Ronald H. Brown Secretary

NATIONAL OCEANIC AND Environmental Resaardl ATMOSPHERIC ADMINISTRATION Laborator1es

D. JAMES BAKER James L Rasmussen Under Secretary for Oceans Director and Atmosphere/Administrator

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NOTICE

Mention of a commercial company or product does not constitute an endorsement by NOAAlERL. Use of information from this publication concerning proprietary products or the tests of such products for publicity or advertising purposes is not authorized.

Contribution No. 1659 from NOANPacific Marine Environmental Laboratory

For sale by the National Technical Information Service, 5285 Port Royal Road Springfield, VA 22161

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CONTENTS

PAGE

ABSTRACT ................................................................. 1

1. INTRODUCTION ......................................................... 1

2. SAMPLING METHODS .................................................... 3

2.1 Sample and Data Collection .............................................. 3

2.2 Sample Analysis ....................................................... 4

3. STATION DATA ......................................................... 5

3.1 Station Locations for VENTS 1994 ........................................ 5

3.2 Individual Station Data .................................................. 5

4. ACKNOWLEDGMENTS ................................................... 6

APPENDIX: Station Data Tables, VENTS 1994 ................................... 17

FIGURE

1. Location map for the 1994 field season ......................................... 2

TABLES

VENTS 1994 (April-September 1994) station locations .............................. 7

VENTS 1994 (April-September 1994) tow-yo bottle trip locations ............. , ........ 9

iii

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VENTS 1994 Cleft and Coaxial Segment Plume Monitoring: Physical and Chemical Data, NOAA Ships Discoverer and Surveyor,

and RfVAtlantis II, April to September 1994

Michael S. Devanyl, Edward T. Bakerl, Richard A. Feelyl, David J. Pashinski1, Geoffrey T. Lebonl, Sharon L. Walkeri, Katherine A. Krogslund2, and Calvin Mordyl

Abstract. This report summarizes salinity. temperature. nutrient. optical. and total suspended matter data collected during the NOAA VENTS cruises in April to September of 1994. The data were collected over the Juan de Fuca Ridge covering an area from 44°00'N to 48°00'N and 126°30'W to I30oS0'W. Additional data were collected on a transect from 4So00'NIl29°4S'W to 3r30'NIlSSoOO'W and south . to 20024'NllSSo00'W.

1. INTRODUCTION The National Oceanic and Atmospheric Administration (NOAA) VENTS Program was

established in 1984 to study the oceanic effects of hydrothermal activity along seafloor spreading

centers. VENTS Program scientists from the Pacific Marine Environmental Laboratory (PMEL)

have conducted intensive oceanographic research on the Cleft and Coaxial Segment of the Juan de

Fuca Ridge spreading center located in the northeast Pacific Ocean basin.

The Juan de Fuca Ridge is a medium rate spreading center. consisting of the Cleft, Vance,

Axial, Coaxial, Cobb, Endeavour, and West Valley segments. The ridge is bounded on the south by

the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone.

As part of the continuing VENTS Program research effort, chemical and physical

oceanography cruises were conducted in April, July, August, and September 1994 aboard the NOAA

Ships Discoverer and Surveyor with scientists from NOAA and the University of Hawaii. An

additional cruise was conducted in June 1994 aboard the Woods Hole Oceanographic Institution's

RN Atlantis II with scientists from NOAA and the University of Washington. These cruises

concentrated on physical oceanography and geochemical studies of the neutrally buoyant

hydrothermal plumes over the Cleft and Coaxial Segments (Fig. 1) in order to quantitatively assess

the impact of hydrothermal emissions of seawater chemistry of the northeast Pacific Ocean. This

report includes the complete set of hydrographic, nutrient. optical. and total suspended matter data

collected on the cruise (Appendix A) and a description of the sampling and analytical methods

employed.

~ NOAAlPacific Marine Environmental Laboratory. 7600 Sand Point Way N.E., Seattle. WA 9811S-0070. School of Oceanography. University of Washington. Seattle. W A 98195.

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NE Pacific Spreading Centers

52°N

51°

50° Explorer

Ridge

49°

48°

47° Juan de Fuca Ridge

46°

45°

44°

43°

42° Gorda Ridge

41°

40°

Fie. 1. Location map for the 1994 field season.

2

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2. SAMPLING METHODS 2.1 Sample and Data Collection 2.1.1 Seawater Samples

Seawater samples were collected in standard 30-liter Niskin™ bottles fixed to a 24-position

General Oceanics™ sampling rosette. The Niskin™ bottles were internally coated with Teflon and

modified with Teflon stopcocks. The sampling rosette was equipped with a CID-transmissometer,

altimeter, and pinger locator; it was lowered into the water using standard hydrographic cable. The

bottles were electronically tripped at pre-determined depths via a signal from the shipboard deck unit

and closed by use of silastic tubing. Upon retrieval the Niskin™ bottles were removed from the

rosette and placed in a non-contaminating pressure filtration rack for sub-sampling (Feely et al.,

1991).

Salinity samples were collected from the Niskin™ bottle in 250 ml citrate bottles.

Nutrient samples were collected from the Niskin™ bottle in HDPE 60 ml bottles prepared by

washing with 10% HCL and rinsed with deionized water. Unfiltered nutrient samples were taken

directly from the Niskin™ bottle. Filtered nutrient samples were taken downline of the 0.4 JIm pore

size Nuclepore polycarbonate filter during the total suspended matter pressure filtration of the

seawater. All nutrients were analyzed at sea within 12 hours after collection.

Total suspended matter samples were collected in 30 L Niskin ™ bottles and pressure filtered

(12 psi) through 37 mm diameter, 0.4 JIm pore size Nuclepore polycarbonate filters. As described

in detail in Feely et al. (1991), an air filter was placed in the tygon line connecting the nitrogen gas

and the Niskin ™ bottle to prevent contamination of the seawater sample from particulates in the gas. To ensure that all particulates were filtered out of the seawater, the filtration racks were designed

to tilt the Niskin™ bottle at a 45-degree angle and during filtration the bottle was gently agitated to

keep particles in suspension. The seawater filtrate was directed into pre-calibrated 20-L plastic

jerricans and volumes were measured to the nearest 100 mL. Depending upon the sample's

proximity to the ridge crest, it took from 2 to 8 hours to filter 20 L of seawater, or to obtain a total

of 400 JIg of loading on the filter. All filters were loaded and unloaded from the teflon savillex

holders inside a laminar flow hood. After filtration the particulate samples were rinsed with pH 8.0 .

deionized water and dried in a dessicator under vacuum.

2.1.2 Conductivity-Temperature-Depth-Transmissometer Data

CI'D-tnmsmissometer data was collected using a Sea-Bird conductivity-temperature-depth

(CTD) sensor and a Sea Tech 0.25 m path length beam transmissometer secured to the frame of a

General Oceanics TM sampling rosette. CTD information at the sampling depths were recorded

shipboard on a MicroVax data acquisition system at trip time by taking a lO-second average of the

continuously collected I-second average data.

3

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2.2 Sample Analysis 2.2.1 Bottle Salinity

Bottle salinity analysis was conducted by NOAA Ship Discoverer personnel on a shipboard

Guildline Autosal™. Samples were stabilized to room temperature, 18c C, before analysis. Final

salinity was determined by averaging three measurements from each citrate bottle. Bottle salinities

from the RIV Atlantis II and NOAA Ship Surveyor were determined by the Northwest Calibration

Center using a calibrated Guildline Autosal 8400 laboratory salinometer using the NRCC standard

procedure.

2.2.2 Nutrients

Silicic acid and phosphate analysis were conducted by Kathy Krogslund of the University of

Washington, employing a Technicon Autoanalyzer and the techniques described by Whitledge

(1981). In the analysis of silicic acid, the average precision of the replicate analyses was ±O.5

J.1molll. Alpha Inorganics™ reagent grade Na2SiF6 was the standard used for this analysis. The

phosphate analysis had an average precision of replicate analyses of :t:20.0 nmolll. Fisher™ certified

primary standard KH2P04 was used for standardization.

On leg 3B, silicic acid and phosphate analysis were conducted by Calvin Mordy using an

Alpkem RFA-300 analyzer modified with Spectra-l 00 detectors from ThermoSeparations Products,

and using protocols from Gordon et al. (1993). At each station five replicates were analyzed with

an average precision of 2 nmolll (0.07%) for phosphate and 0.1 J.1 molll (O'(l6%) silicic acid. Standard

material for silicic acid analysis was the same lot of Alpha Inorganics reagent grade N~SiF6 used

on previous legs, and was found to be within 0.05% of standards cross-referenced against an

Ultra-pure Si02 standard. Standard material for phosphate was the same lot of Fisher™ certified

primary standard KH2P04 used on previous legs.

2.2.4 Total Suspended Matter

Total suspended matter filters were weighed after desiccation on a Cabn 26™ Automatic

Electrobalance which has an accuracy of ±O.005% of the true sample mass. Corrections for changes

in filter weight were determined by reweighing reference filters, resulting in a net weight of

particulate suspended matter. Given the net weight and volume of water filtered. total suspended

matter concentrations were determined.

2.2.5 Conductivity-Temperature-Depth· Transmissometer Data

Measured conductivity was converted to salinity using standard UNESCO algorithms

(Fofonoff and Millard. 1983). The conductivity data was corrected by direct comparison of bottle

salinity and CTD salinity values. An average offset was determined for each cast.

Potential temperature was calculated using standard UNESCO algorithms (Fofonoff and

Millard. 1983) and the cm measured values of in situ temperature and salinity.

4

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In situ density was calculated using standard UNESCO algorithms (Fofonoff and Millard,

1983) and the CTD measured values of in situ temperature and salinity.

Potential density was determined using standard UNESCO algorithms (Fofonoff and Millard,

1983) and the CTD measured salinity values.

Attenuation was measured and final values calculated as described in detail in Bartz et al.

(1978).

The attenuation anomaly was calculated by determining the background value associated with

each cast and subtracting that value from each discrete value.

The temperature anomaly (Ae) of each cast was calculated relative to the ambient water of the same potential density using the method of Lupton et al. (1985) with the equation

Ae = e - m *oe - b

where e and 0e are the potential temperature and potential density, respectively, of the linear

equation of the e versus 00 trend for water immediately above the hydrothermal plume where the

hydrographic effect of the hydrothermal emissions is negligible. The equation used for calculating

the temperature anomaly for each individual cast is listed in the bottom left-hand portion of each

station table.

3. STATION DATA 3.1 Station Locations for VENTS 1994

The data represented in Appendix A were collected from April 19 to September 30, 1994 over

the Juan de Fuca Ridge covering an area from 44 °OO'N to 48°00'N and 126°30'W to 1300 50'W.

Additional data were collected on a transect from 45 °OO'N1129 °45' to 32°30'/155°00' and south

to 20°24'1155°00'. GPS was used for shipboard navigation and a listing of each station's latitude,

longitude, and date of occupation is given in Table 1.

Vertical CTD profiles were taken at the majority of stations. Additionally, given the dynamic

nature of hydrothermal plumes, a limited number of lengthy, horizontal tows, called "to-yos," were

also conducted. To-yos were conducted by regularly cycling the CTD rosette package between the

top and bottom layers of the hydrothermal plume. The ship's towing speed varied from 2-3 kmIhr. Niskin™ bottle trip positions for each tow are given in Table 3.

3.2 Individual Station Data The header on the data tables in Appendix A contains the station identification and

consecutive cast number, the date the station was occupied, and the latitude and longitude of the

station. The data is listed in rows by Niskin TM bottle number and in 21 columns as follows:

Column 1: Niskin™ bottle number

Column 2: Depth in meters

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Column 3: Depth in decibars

Column 4: In situ temperature (OC)

Column 5: Potential temperature (OC)

Column 6: Temperature anomaly (OC)

Column 7: Salinity-CTD (PSU)

Column 8: Salinity-Bottle (PSU)

Column 9: Attenuation (11m)

Column 10: In situ density (CTD salinity)

Column 11: In situ density (Bottle salinity)

Column 12: Potential density (CTD salinity)

Column 13: Potential density (Bottle salinity)

Column 14: Unfiltered P04

Column 15: Filtered P04

Column 16: Unfiltered Si04

Column 17: Filtered SiO 4

Column 18: Total suspended matter

The lower left portion of each table displays the equation used to calculate the station's

temperature anomaly.

4. ACKNOWLEDGMENTS The research was supported by the National Oceanic and Atmospheric Administration's

VENTS Program. We gratefully acknowledge the assistance and professionalism of the officers and

crew of the NOAA Ships Discoverer and Surveyor, and RIV Atlantis II in the collection of this data.

6

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VENTS 1994 (APRIL-SEPTEMBER 1994)

STATION LOCATIONS

STATION DATE LATITUDE LONGITUDE

V94A01C01 19 Apr 1994 46°17.64' 129°41.67' V94A02C02 19 Apr 1994 46°09.54' 129°48.07' V94A04C08 22 Apr 1994 44°55.40' 130°07.20' V94A05C09 22 Apr 1994 44°56.02' 130°09.93' V94A06C1O 22 Apr 1994 44°56.46' 130°10.72' V94AllC17 23 Apr 1994 44°57.90' 130°18.10' V94A13C19 23 Apr 1994 44°57.20' 130°15.00' V94A14C20 23 Apr 1994 44°56.60' 130°12.90' V94A15C21 24 Apr 1994 44°56.60' 130°11.30' V94A16C22 24 Apr 1994 44°55.63' 130°09.43' V94A17C23 24 Apr 1994 44°55.44' 130°08.00' V94A18C24 24 Apr 1994 44°54.40' 130°05.20' V94BOlCOI 20Jun 1994 45°01.83' 130°13.31' V94B02C02 21 Jun 1994 44°59.33' 130°12.23' V94B02RC03 21 Jun 1994 44°59.27' '130°12.21' V94B03C04 21 Jun 1994 44°54.00' 130°14.58' V94B04C05 22 Jun 1994 44°57.83' 130°13.02' V94B05C09 24 Jun 1994 44°38.58' 130°22.76' V94B06C1O 27 Jun 1994 44°40.65' 130°21.45' V94B07C12 28 Jun 1994 44 °37.21' 130°23.04' V94B08C13 30Jun 1994 46°31.31' 129°34.67' V94B09C17 03 Jul1994 46°08.82' 129°48.40' V94B09RC18 05 Jul1994 46°09.17' 129°48.61' V94BIOC20 07 Jull994 46°18.45' 129°42.50' V94COICOI 29 Jull994 44°57.90' 130°12.70' V94C02C13 06 Aug 1994 47°42.49' 127°47.20' V94C03C15 06 Aug 1994 47°42.69' 127°46.90' V94C04C14 06 Aug 1994 47°42.74' 127°47.18' V94C08C16 07 Aug 1994 47°42.60' 127°47.00' V94C05C21 07 Aug 1994 47°42.90' 127°47.58' V94C06C20 07 Aug 1994 47°42.77' 127°47.41' V94CIOC25 08 Aug 1994 47°43.48' 127°48.46' V94C12C28 09 Aug 1994 47°55.01' 127°00.00' V94E01C01 14 Sep 1994 44 °59.93' 129°30.00' V94E02C05 16 Sep 1994 44°55.32' 130°07.82' V94E03C06 16 Sep 1994 44°55.81' 130°09.71' V94E04C07 16 Sep 1994 44°56.19' 130°11.31' V94E05C08 16 Sep 1994 44°56.68' 130°13.23' V94E06C09 17 Sep 1994 44°58.39' 130°12.70' V94E07CI0 17 Sep 1994 44°57.07' 130°14.87' V94E08Cl1 17 Sep 1994 44°57.53' 130°16.76' V94E09C12 17 Sep 1994 44°57.97' 130°18.29' V94EIOC13 17 Sep 1994 45°00.08' 130°44.92' V94EllC14 17 Sep 1994 45°56.50' 129°58.70' V94E12C15 18 Sep 1994 46°26.74' 128°30.07' V94E13C16 19 Sep 1994 46°23.51' 127°29.99' V94E14C17 19 Sep 1994 46°20.25' 126°29.68'

7

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STATION DATE LATITUDE LONGITUDE

V94FOICOI 20Sep 1994 45°00.22' 129°45.09' V94F02C02 20Sep 1994 44°58.20' 130° 12.76' V94F03C03 21 Sep 1994 44°56.13' 130°40.30' V94F04C04 21 Sep 1994 44°53.03' 131 °07.97' V94F05C05 21 Sep 1994 44°50.02' 131 °34.96' V94F06C06 21 Sep 1994 44°42.89' 13r43.17' V94F07C07 21 Sep 1994 44°37.05' 133°50.94' V94F08C08 '22 Sep 1994 44°29.99' 135°00.19' V94F09C09 22 Sep 1994 44°07.00' 136°13.22' V94FIOClO 22 Sep 1994 43°44.06' 137°26.00' V94FllCll 23 Sep 1994 43°19.89' 138°39.98' V94F12C12 23 Sep 1994 4r35.16' 140°05.08' V94FI3CI3 23 Sep 1994 41 °29.99 141 °29.98' V94FI4C14 24 Sep 1994 40°30.01' 142°59.79' V94F15C15 24 Sep 1994 39°29.98' 144°29.98' V 94FI6C16 24Sep 1994 38°30.01' 145°59.97' V94FI7CI7 25 Sep 1994 37°30.05' 147°30.03' V94F18C18 25 Sep 1994 36°30.01' 149°00.03' V 94FI9C19 26 Sep 1994 35°30.06' 150°29.82' V94F2OC20 26Sep 1994 34°29.96' 15roo.02' V94F21C21 26Sep 1994 33°29.94' 153°30.10' V94F22C22 27 Sep 1994 32°30.03' 155°00.07' V94F23C23 27 Sep 1994 30°50.10' 155°00.03' V94F24C24 28 Sep 1994 29°09.88' 155°00.03' V94F25C25 28 Sep 1994 27°29.91' 155°00.14' V94F26C26 28 Sep 1994 25°50.03' 155°00.02' V94F27C27 29 Sep 1994 24°10.00' 154°59.98' V94F28C28 29Sep 1994 2r29.93 , 154°59.95' V94F29C29 30Sep 1994 20°59.95' 155°00.08' V94F3OC30 30Sep 1994 20°24.10' 155°00.10'

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VENTS 1994 (APRIL-SEPTEMBER 1994)

TOW-YO BOTTLE TRIP LOCATIONS

Tow Date occupied Bottle Latitude Longitude

T94BOl 22 Jun 1994 10 44 °55.80' 130°8.94' 9 44°55.83' 130°8.97' 8 44°56.65' 130°10.36' 7 44°57.21' 130° 11.70' 6 44°57.44' 130° 12.33' 5 44°57.52' 130°12.53' 4 44°57.53' 130° 12.57' 3 44°57.55' 130°12.64' 2 44°57.80' 130° 13.36' 1 44 °58.19' 130°14.55'

T94B03 23 Jun 1994 10 44°58.91' 130° 11.79' 9 44 °57.90' 130°10.93' 8 44°57.56' 130°10.17' 7 44°57.51' 130° 10.18' 6 44°56.41' 130°12.27' 5 44°55.08' 130°13.73'

T94B04 27 Jun 1994 10 44 °45.26' 130°17.95' 9 44°44.68' 130°18.94' 8 44°43.76' 130°19.68' 7 44°41.46' 130°20.81' 6 44°40.99' 130°21.03' 5 44°40.02' 130°21.48' 4 44°39.48' 130°21.72' 3 44°38.50' 130°22.22' 2 44 °38.19' 130°22.39' 1 44°38.14' 130°22.41'

11 44 °37.75' 130°22.62' 12 44°37.73' 130°22.63'

T94B05 01 Jul 1994 10 46°20.11' 129°41.57' 9 46°19.87' 129°41.68' 8 46°19.70' 129°41.77' 7 46°19.46' 129°41.88' 6 46°19.09' 129°42.05' 5 46° 18.75' 129°42.23' 4 46°18.71' 129°42.26' 3 46°18.59' 129°42.32' 2 46°18.57' 129°42.33' 1 46°18.34' 129°42.47'

11 46°17.61' 129°42.88' 12 46°16.28' 129°43.61'

T94B06 02Jul1994 10 45°59.96' 129°59.32' 9 45°59.57' 129°59.27' 8 45°56.29' 129°59.11' 7 45°55.96' 129°59.12'

9

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Tow Date occupied Bottle Latitude Longitude

T94B07 03 Jul1994 10 46°9.06' 129°48.04' 9 46°9.13' 129°48.22' 8 46°9.17' 129°48.32' 7 46°9.22' 129°48.45' 6 46°9.27' 129°48.63' 5 46°9.31' 129°48.77' 4 46°9.57' 129°49.56' 3 46°9.78' 129°50.24'

T94B08 05 Jul1994 10 46°6.60' 129°49.83' 9 46°7.34' 129°49.51' 8 46°7.92' 129°49.25' 7 46°8.22' 129°49.10' 6 46°8.42' 129°48.99' 5 46°9.09' 129°48.58' 4 46°9.03' 129°48.62' 3 46°9.42' 129°48.37' 2 46°9.82' 129°48.09' 1 46°10.15' 129°47.85'

T94C01 30 July 1994 1 45°9.17' 130°6.78' 2 45°8.17' 130°7.45' 3 45°7.48' 130°7.83' 4 45°6.74' 130°8.26' 5 45°5.68' 130°8.84' 6 45°4.78' 130°9.28' 7 45°3.75' 130°9.82' 8 45°2.79' 130°10.33' 9 45° 1.73' 130°10.90'

10 45°1.30' 130° 11.13' 11 45°0.71' 130°11.33' 13 44 °59.97' 130°11.49' 14 44°59.22' 130°11.60' 15 44 °57.74' 130°11.82' 16 44°57.06' 130°12.12' 17 44 °56.75' 130°12.32'

T94C02 31 July 1994 1 44°57.33' 130°12.82' 2 44°55.47' 130°13.87' 3 44°54.97' 130° 14.15' 4 44°53.69' 130°14.88' 5 44 °53.18' 130° 15.15' 6 44°50.89' 130°16.33' 7 44°49.22' 130° 17.15' 8 44°46.39' 130°18.54' 9 44°44.12' 130°19.68'

10 44°41.66' 130°20.84' 11 44 °41.59' 130°20.88' 12 44°41.51' 130°20.92' 13 44°41.34' 130°21.01' 14 44 °41.26' 130°21.06'

10

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Tow Date occupied Bottle Latitude Longitude

15 44°40.57' 130°21.42' 16 44°40.52' 130°21.44' 17 44 °40.42' 130°21.48' 18 44 °40.34' 130°21.52' 19 44 °40.31' 130°21.54' 20 44°40.27' 130°21.57'

T94C03 01 Aug 1994 1 45° 7.01' 130°7.69' 3 45°7.43' 130°8.85' 4 45°7.48' 130°9.01' 5 45°7.72' 130°9.91 ' 6 45°8.38' 130° 12.22' 7 45°8.74' 130° 13.42' 8 45°9.04' 130° 14.34'

T94C04 01 Aug 1994 1 45°0.85' 130°17.02' 2 45°0.53' 130° 15.81' 3 45°0.31' 130°15.09' 4 44°59.95' 130°13.93' 5 44°59.41' 130° 12.22' 6 44 °59.22' 130° 11.41' 7 44°59.20' 130° 11.32' 8 44 °59.18' 130°11.25' 9 44 °59.16' 130° 1l.14'

T94C05 02 Aug 1994 1 44°50.21' 130°8.08' 2 44°50.21' 130°8.08' 3 44°50.21' 130°8.08' 4 44 °50.21' 130°8.08' 5 44°50.13' 130°8.11' 6 44°50.18' 130°8.13' 7 44 °50.20' 130°8.14' 8 44 °50.13' 130°8.10' 9 44°50.20' 130°8.15'

10 44°50.21' 130°8.16' 11 44 °50.21' 130°8.16' 12 44 °50.23' 130°8.18' 13 44°50.20' 130°8.14' 14 44°51.39' 130° 13.32' 15 44°51.59' 130° 14.13' 16 44 °51.97' 130° 15.84' 17 44°52.26' 130° 17.28'

T94C06 03 Aug 1994 3 44°59.95' 130° 12.01' 4 44°59.85' 130°12.07' 5 44 °59.76' 130° 12.13' 6 44°59.70' 130°12.16' 7 44°59.65' 130° 12.19' 8 44 °59.58' 130°12.23' 9 44 °59.52' 130°12.27'

10 44°59.39' 130° 12.33' 11 44 °59.34' 130° 12.36'

11

Page 16: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

Tow Date occupied Bottle Latitude Longitude

12 44°59.20' 130°12.44'

T94C07 04 Aug 1994 1 46°8.93' 129°48.52' 2 46°9.05' 129°48.45' 3 46°9.46' 129°48.17' 4 46°9.85' 129°47.89' 5 46°11.03' 129°47.07' 6 46°19.15' 129°42.73' 7 46°19.20' 129°42.67' 8 46°19.26' 129°42.61' 9 46°19.35' 129°42.52'

10 46°19.84' 129°42.07' 11 46°24.70' 129°38.48' 12 46°30.64' 129°35.06'

T94C08 05 Aug 1994 1 46°30.31' 129°34.30' 2 46°30.39' 129°34.78' 3 46°30.49' 129°35.39' 4 46°30.51' 129°35.45' 5 46°30.60' 129°36.16' 6 46°30.73' 129°37.14'

T94C09 05 Aug 1994 1 46° 17.85' 129°40.99' 2 46°18.24' 129°42.39' 3 46°18.39' 129°42.99' 4 46°18.78' 129°44.53'

T94CIO 05 Aug 1994 1 46°9.03' 129°47.92' 2 46°9.33' 129°48.89'

T94C11 06 Aug 1994 1 47°42.02' 127°47.74' 2 47°42.02' 127°47.74' 3 47°42.02' 127°47.74' 4 47°42.03' 127°47.73' 5 47°42.03' 127°47.73' 6 47°42.03' 12r47.73' 7 47°41.95' 127°47.79' 8 47°42.31' 127°47.48' 9 47°42.31' 127°47.48'

10 47°42.30' 127°47.48' 11 47°42.40' 127°47.41' 12 47°42.50' 127°47.31' 13 47°42.57' 127°47.27' 14 47°42.89' 127°47.04' 15 47°42.89' 127°47.04' 16 47°42.91' 127°47.02' 17 47°43.13' 127°46.87' 18 47°43.15' 127°46.86' 19 47°43.18' 127°46.84' 20 47°43.18' 127°46.84'

12

Page 17: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

Tow Date occupied Bottle Latitude Longitude

T94C12 07 Aug 1994 1 47°42.61' 127°46.81' 2 47°42.70' 127°46.91' 3 47°42.81' 127°47.23' 4 47°42.82' 127°47.25' 5 47°42.82' 127°47.25' 6 47°42.82' 127°47.26' 7 47°42.90' 127°47.55' 8 47°42.91' 127°47.60' 9 47°42.97' 127°47.76'

T94C13 07 Aug 1994 1 47°42.73' 127°47.54' 2 47°43.12' 127°47.54' 3 47°43.33' 127°47.56'

T94C14 07 Aug 1994 1 47°42.88' 127°46.99' 2 47°42.36' 127°47.29' 3 47°42.21' 127°47.39' 4 47°42.08' 127°47.49' 5 47°41.82' 127°47.68' 6 47°41.75' 127°47.74'

T94C15 07 Aug 1994 1 47°42.37' 127°48.44' 2 47°42.46' 127°48.21' 3 47°42.49' 127°48.14' 4 47°42.50' 127°48.11' 5 47°42.52' 127°48.06' 6 47°42.67' 127°47.70' 7 47°42.68' 127°47.66' 8 47°42.70' 127°47.62' 9 47°42.73' 127°47.56'

10 47°42.90' 127°47.15' 11 47°42.92' 127°47.08' 12 47°42.94' 127°47.04' 13 47°42.96' 127°47.00' 14 47°43.12' 127°46.61' 15 47°43.13' 127°46.58' 16 47°43.15' 127°46.52' 17 47°43.17' 127°46.48'

T94C16 08 Aug 19940 1 47°50.24' 127°43.64' 2 47°50.34' 127°43.61' 3 47°50.38' 127°43.60' 4 47°50.33' 127°43.61' 5 47°51.37' 127°43.25' 6 47°51.42' 127°43.25' 7 47°51.47' 127°43.24' 8 47°51.60' 127°43.22'

T94C17 08 Aug 1994 1 47°50.40' 127°44.16' 2 47°50.76' 127°43.77' 3 47°50.79' 127°43.73'

13

Page 18: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

Tow Date occupied Bottle Latitude Longitude

4 47°50.90' 127°43.62' 5 47°50.98' 127°43.52' 6 47°51.15' 127°43.34' 7 47°51.33' 127°43.14'

T94C18 09 Aug 1994 1 47°41.97' 127°47.09' 2 47°42.01 ' 127°47.02' 3 47°42.07' 127°46.91 ' 4 47°42.12' 127°46.82' 5 47°42.47' 127°46.28' 6 47°42.51' 127°46.21' 7 47°42.57' 127°46.13' 8 47°42.66' 127°45.99' 9 47°43.19' 127°45.20'

10 47°43.26' 127°45.10' 11 47°43.30' 127°45.04' 12 47°43.34' 127°44.98'

T94C19 09 Aug 1994 1 47°51.61 ' 127°36.93' 2 47°52.29' 127°36.76' 3 47°53.08' 127°36.64' 4 47°53.11' 127°36.63' 5 47°53.16' 127°36.63' 6 47°53.38' 127°36.60' 7 4r54.72' 127°36.30' 8 47°53.95' 127°36.86' 9 47°53.86' 127°36.91 '

10 47°53.59' 127°37.09' 11 47°53.52' 127°37.15' 12 47°53.49' 127°37.18' 13 47°53.05' 127°37.53' 14 47°51.84' 127°38.22' 15 47°51.78' 127°38.24' 16 47°51.74' 127°38.25' 17 47°51.71 ' 127°38.25' 18 47°50.70' 127°38.44' 19 47°50.68' 127°38.44' 20 47°50.66' 127°38.44'

T94EOl 15 Sep 1994 4 44°55.59' 130° 14.07' 6 44 °55.50' 130°14.12' 8 44°55.39' 130°14.18'

10 44°55.11' 130°14.36' 14 44°54.61 ' 130° 14.67' 16 44°53.54' 130°15.42' 18 44°52.27' 130° 16.42'

T94E02 15 Sep 1994 4 44 °57.39' 130° 16.58' 6 44 °57.34' 130°16.75' 8 44°57.28' 130°16.91 '

10 44°57.16' 130°17.26'

14

Page 19: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

Tow Date occupied Bottle Latitude Longitude

14 44°56.941 130°17.821 16 44°56.32 1 130°19.07 1

18 44°56.011 130°19.261

T94E03 15 Sep 1994 4 44°56.161 130°9.871

6 44 °56.05 1 130°9.681

8 44°55.941 130°9.491

10 44 °55.741 130°9.15 1

14 44°55.461 130°8.65 1

16 44°54.901 130°7.691

18 44°54.05 1 130°6.941

15

Page 20: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research
Page 21: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

APPENDIX:

Station Data Tables VENTS 1994

17

Page 22: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

-00

VEN

TS

1994

-

SUR

VEY

OR

S

ta.t

ion

V94

A01

east

01

19

APR

19

94

LA

T:

46

17

.64

N

LON

G:

12

9

41.6

7W

Nis

kin

D

epth

D

epth

In

sit

u

Po

ten

tial

Tem

p.

Sali

nit

y

Sali

nit

y

Att

en

. S

igm

a-t

S

igm

a-t

Sig

ma-

Th

eta

Sig

ma-

Th

eta

TSM

..

(m

) (d

b)

Tem

p.

Tem

p.

Ano

m

(eT

D)

(Bo

ttle

) (l

Im)

(eT

D)

(Bo

ttle

) (e

TD

) (B

ott

le)

(ug

/l)

1 2

20

6.2

2

19

84

.4

3 1

49

8.5

4

10

01

. 9

5 5

09

.1

22

36

.5

20

10

.5

15

16

.5

10

12

.7

51

4.0

1.9

35

1

.95

5

2.3

93

3

.24

2

4.3

81

1.7

79

1

.81

8

2.2

91

3

.17

1

4.3

43

34

.60

5

34

.59

7

34

.52

0

34

.37

3

34

.07

8

34

.60

6

34

.60

7

34

.60

4

34

.56

6

34

.61

2

0.3

13

0

.30

8

0.3

08

0

.31

1

0.3

11

27

.66

0

27

.65

2

27

.55

5

27

.36

2

27

.01

3

27

.66

1

27

.66

0

27

.62

2

27

.51

6

27

.43

7

27

.67

2

27

.66

3

27

.56

4

27

.36

9

27

.01

7

27

.67

3

27

.67

1

27

.63

1

27

.52

3

27

.44

1

Page 23: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

- '"

VEN

TS

19

94

-

SURV

EYO

R S

tati

on

V94

A02

east

02

19

APR

19

94

LA

T:

46

09

.54

N

LON

G:

12

9

48.0

7W

Nis

kin

D

epth

D

epth

In

sit

u

Po

ten

tial

Tem

p.

Sali

nit

y

Sali

nit

y

Att

en

. S

igm

a-t

Sig

ma-

t S

igm

a-T

het

a S

igm

a-T

het

a TS

M

t (m

) (d

b)

Tem

p.

Tem

p.

Ano

m

(eT

D)

(Bo

ttle

) (1

1m)

(eT

D)

(Bo

ttle

) (e

TD

) (B

ott

le)

(uq

/ll

1 2

02

5.5

2

19

82

.6

3 1

49

8.5

4

10

05

.8

5 5

09

.3

20

52

.3

20

08

.6

15

16

.5

10

16

.6

51

4.1

1.9

52

1

.96

6

2.3

34

3

.22

4

4.4

77

1.8

12

1

.82

9

2.2

33

3

.15

3

4.4

38

34

.60

1

34

.59

6.

34

.52

8

34

.37

1

34

.07

4

34

.59

9

34

.59

4

34

.58

8

34

.55

5

34

.52

9

0.3

11

0

.30

9

0.3

10

0

.31

2

0.3

14

27

.65

6

27

.65

1

27

.56

7

27

.36

2

26

.99

9

27

.65

4

27

.64

9

27

.61

5

27

.50

9

27

.36

1

27

.66

7

27

.66

1

27

.57

5

27

.36

9

27

.00

4

27

.66

5

27

.66

0

27

.62

3

27

.51

6

27

.36

5

Page 24: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

~

VEN

TS

1994

-

SURV

EYO

R S

tati

on

T94

A02

cast

05

20

A

PR

1994

LA

T:

44

53.4

2N

LON

G:

130

14.8

W

Nis

kin

D

epth

D

epth

In

situ

P

ote

nti

al

Tem

p.

Sali

nit

y

Sali

nit

y

Att

en.

Sig

ma-

t S

igm

a-t

Sigma~Theta

Sig

ma-

Th

eta

TSM

t

(m)

(db)

T

emp.

T

emp.

A

nom

(C

TD)'

(Bo

ttle

) (1

1m)

(CTD

) (B

ott

le)

(CTD

) (B

ott

le)

(ug

/l)

1 1

18

6.3

1

19

9.5

2

.91

2

4 1

15

6.4

1

16

9.1

2

.94

2

2.8

30

2

.86

2

34

.45

0

34

.43

9

0.3

1

27

.45

4

0.3

1

27

.44

3

27

.46

1

27

.45

0

Page 25: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

IV -

VEN

TS

19

94

-

SUR

VEY

OR

S

tati

on

V94

A04

C

ast

08

22

APR

1

99

4

LA

T:

44

55

.4N

LO

NG

: 1

30

07

.2W

Nis

kin

D

epth

D

epth

In

sit

u

Po

ten

tial

Tem

p.

Sali

nit

y

Sali

nit

y

Att

en

. S

igm

a-t

Sig

ma-

t S

igm

a-T

het

a S

igm

a-T

het

a TS

M

* (m

) (d

b)

Tem

p.

Tem

p.

Ano

m

(CTD

) (B

ott

le)

(11m

) (C

TD)

(Bo

ttle

) (C

TD)

(Bo

ttle

) (u

qll

)

1 2

36

2.3

2

20

01

.2

3 1

50

1. 7

4

10

01

. 6

5 5

00

.8

23

95

.2

20

27

.3

15

19

.5

10

12

.2

50

5.5

1. 7

90

1.9

04

2

.41

2

3.2

62

4

.80

4

1. 6

23

1. 7

67

2.3

10

3

.19

1

4.7

65

34

.63

1

34

.60

3

34

.53

0

34

.38

7

34

.09

7

34

.51

9

34

.09

5

32

.53

1

32

.53

2

0.3

15

0

.30

9

0.3

10

0

.31

1

0.3

12

27

.69

2

27

.66

1

27

.56

2

27

.37

2

26

.98

2

27

.60

3

27

.25

4

25

.96

3

25

.89

2

27

.70

5

27

.67

2

27

.57

0

27

.37

8

26

.98

6

27

.61

5

27

.26

4

25

.97

1

25

.89

9

Page 26: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

~

VEN

TS

19

94

-

SUR

VEY

OR

S

tati

on

V94

A05

C

ast

09

22

APR

1

99

4

LA

T:

44

56

.02

N

LON

G:

13

0

09.9

3W

Nis

kin

D

epth

D

epth

In

sit

u

Po

ten

tial

Tem

p.

Sali

nit

y

sali

nit

y

Att

en

. S

igm

a-t

S

igm

a-t

S

igm

a-T

het

a S

igm

a-T

het

a TS

M

t (m

) (d

b)

Tem

p.

Tem

p.

Ano

m

(CTD

) (B

ott

le)

(11m

) (C

TD)

(Bo

ttle

) (C

TD)

(Bo

ttle

) (u

g/l

)

1 2

34

0.3

2

19

98

.0

3 1

49

7.4

4

99

9.6

5

49

6.9

2372

.8

20

24

.1

15

15

.2

10

10

.3

50

1.6

1.8

23

1

.90

8

2.4

10

3

.26

5

5.0

18

1.6

57

1

.77

1

2.3

08

3

.19

4

4.9

78

34

.62

5

34

.60

4

34

.53

1

34

.38

5

34

.14

3

34

.13

1

32

.48

6

32

.48

9

32

.48

6

32

.48

7

0.3

15

0

.31

1

0.3

09

0

.31

1

0.3

13

27

.68

5

27

.66

2

27

.56

3

27

.37

0

26

.99

4

27

.28

9

25

.96

5

25

.92

9

25

.85

6

25

.68

1

27

.69

8

27

.67

2

27

.57

1

27

.37

6

26

.99

8

27

.30

1

25

.97

4

25

.93

7

25

.86

2

25

.68

6

Page 27: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

N

W

VEN

TS

1994

-

SURV

EYO

R S

tati

on

V94

A06

C

ast

10

22

APR

1

99

4

LA

T:

44

56

.46

N

LON

G:

13

0 1

0.72

W

Nis

kin

D

epth

D

epth

In

sit

u

Po

ten

tial

Tem

p.

Sali

nit

y

Sali

nit

y

Att

en

. S

igm

a-t

Sig

ma-

t S

igm

a-T

het

a S

igm

a-T

het

a TS

M

t (m

) (d

b)

Tem

p.

Tem

p.

Mom

(C

TD)

(Bo

ttle

) (1

1m

) (C

TD)

(Bo

ttle

) (C

TD)

(Bo

ttle

) (u

g/l

)

1 2

20

4.0

2

19

93

.B

3 1

49

9.3

4

99

6.4

5

49

3.B

22

33

.B

20

19

.B

15

17

.1

10

07

.0

49

B.5

1.B

62

1

.90

9

2.3

99

3

.24

5

5.0

7B

1. 7

0B

1.7

72

2

.29

7

3.1

75

5

.03

B

34

.62

0

34

.60

6

34

.53

5

34

.3B

9

34

.14

2

0.3

15

0

.31

4

0.3

09

0

.31

1

0.3

12

27

.67

B

27

.66

3

27

.56

7

27

.37

5

26

.9B

6

27

.69

0

27

.67

4

27

.57

5

27

.3B

l 2

6.9

91

Page 28: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

~

VEN

TS

1994

-

LEG

I

Sta

tio

n T

94A

05

Cast

1

5

23 A

PR

1994

L

AT

: 44

5

7.9

N

LON

G:

130

14.O

W

Nis

kin

D

epth

D

epth

In

sit

u

Po

ten

tial

Tem

p.

Sali

nit

y

Sali

nit

y

Att

en

. S

igm

a-t

Sig

ma-

t S

igm

a-T

het

a S

igm

a-T

het

a TS

M

t (m

) (d

b)

Tem

p.

Tem

p.

Ano

m

(CTD

) (B

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9

Page 29: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

IV

VI

VEN

TS

19

94

-

SUR

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S

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1

Page 30: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

~

VEN

TS

1994

-

SUR

VEY

OR

S

tati

on

V94

A11

C

ast

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23

APR

1

99

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LA

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44

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0 1

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kin

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5

Page 31: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

N ......

VEN

TS

1994

-

SUR

VEY

OR

S

tati

on

V94

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ast

19

2

3 A

PR

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94

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3

Page 32: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

N

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VEN

TS

19

94

-

SUR

VEY

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S

tati

on

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23

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6

Page 33: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

~

VEN

TS

1994

-

SUR

VEY

OR

S

tati

on

V94

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C

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24

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94

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NG

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0 11

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Page 34: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

w

o

VEN

TS

1994

-

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Page 35: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

V.)

-

VEN

TS

19

94

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Page 36: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

CoN

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VEN

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19

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VEN

TS

19

94

-

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on

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B01

east

01

20

JO

N

19

94

L

AT

: 4

5

01

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N

LON

G:

13

0

l3.3

1W

Nis

kin

D

epth

D

epth

In

sit

u

Po

ten

tial

Tem

p.

Sali

nit

y

Sali

nit

y

Att

en

. S

igm

a-t

S

igm

a-t

S

igm

a-T

heta

S

igm

a-T

heta

t

(m)

(db

) T

emp.

T

emp.

A

nom

(e

TD

) (B

ott

le)

(l/m

) (e

TD

) (B

ott

le)

(eT

C)

(Bo

ttle

)

10

2

31

3.2

2

34

5.1

1

.84

0

1.6

77

3

4.6

25

0

.34

2

27

.68

4

27

.69

6

9 2

24

8.3

2

27

9.1

1

.85

0

1.6

92

3

4.6

23

3

4.6

21

0

.34

2

27

.68

1

27

.68

0

27

.69

3

27

.69

2

8 2

22

2.6

2

25

2.8

1

.85

7

1. 7

01

3

4.6

22

0

.34

3

27

.68

0

27

.69

2

7 2

19

6.1

2

22

5.9

1

.86

3

1.7

10

3

4.6

22

0

.34

4

27

.68

0

27

.69

1

6 2

17

4.2

2

20

3.5

1

.86

2

1. 7

11

34

.62

1

0.3

42

2

7.6

79

2

7.6

90

5

21

49

.6

21

78

.5

1.8

60

1

.71

1

34

.61

8

34

.61

7

0.3

39

2

7.6

77

2

7.6

76

2

7.6

88

2

7.6

87

4

21

04

.7

21

32

.8

1.8

61

1

. 71

6

34

.61

5

0.3

37

2

7.6

74

2

7.6

85

3

20

51

.4

20

78

.5

1.8

84

1

.74

3

34

.60

8

0.3

40

2

7.6

67

2

7.6

78

2

19

40

.5

19

65

.6

1.9

39

1

.80

6

34

.59

7

34

.59

8

0.3

36

2

7.6

54

2

7.6

54

2

7.6

64

2

7.6

65

1

18

49

.0

18

72

.5

1. 9

99

1

.87

3

34

.58

6

0.3

37

2

7.6

40

2

7.6

50

P0

4-0

NF

S

i04

-0N

F

N03

-0N

F

TSM

(u

mo

l/L

) (u

mo

l/L

) (u

mo

1/L

) (u

g/1

) --

----

----

----

----

----

----

----

----

----

-2

.89

76

59

1

89

.08

46

0

3.0

38

11

8

18

8.9

20

2

0 V

o)

3.0

37

05

7

18

9.1

53

8

0 V

o)

3.0

01

83

7

18

6.9

99

4

0 2

.29

31

76

1

75

.49

20

0

2.9

41

15

5

18

7.6

65

7

0 3

.06

20

94

1

84

.51

63

0

3.1

48

87

3

18

1. 3

66

9

0 3

.15

26

92

1

81

. 60

05

0

3.0

24

75

1

18

0.4

41

1

0

Page 38: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

19

94

-

.AII

S

tati

on

V94

B02

C

ast

02

21

JO

N

19

94

L

AT

: 44

5

9.3

3N

LO

NG

: 1

30

1

2.2

3W

Nis

kin

D

epth

D

epth

In

sit

u

Po

ten

tial

Tem

p.

Sali

nit

y

sali

nit

y

Att

en

. S

igm

a-t

S

igm

a-t

S

igm

a-T

heta

S

igm

a-T

heta

I

(m)

(db

) T

emp.

T

emp.

A

nom

(C

TD)

(Bo

ttle

) (l

/m)

(CT

D)

(Bo

ttle

) (C

TD

) (B

ott

le)

--------------------------~-------------------------------------------------------------------------------------------------

10

2

23

2.4

2

26

2.8

1

.86

6

1. 7

09

3

4.6

22

0

.34

6

27

.67

9

27

.69

1

9 2

22

6.9

2

25

7.3

1

.86

5

1.7

09

3

4.6

22

0

.34

5

27

.67

9

27

.69

1

8 2

20

3.4

2

23

3.3

1

.86

9

1. 7

15

3

4.6

23

0

.34

3

27

.68

0

27

.69

2

7 2

17

9.8

2

20

9.2

1

.86

8

1. 7

16

3

4.6

23

0

.34

3

27

.68

0

27

.69

2

6 2

15

6.3

2

18

5.3

1

.86

6

1. 7

16

3

4.6

23

0

.34

3

27

.68

0

27

.69

2

5 2

12

4.5

2

15

2.9

1

.86

7

1.7

20

3

4.6

23

0

.34

3

27

.68

0

27

.69

1

4 2

10

0.3

2

12

8.2

1

.86

6

1.7

21

3

4.6

23

0

.34

3

27

.68

0

27

.69

1

3 2

04

8.7

2

07

5.7

1

.86

5

1.7

24

3

4.6

11

0

.33

6

27

.67

1

27

.68

1

2 1

94

3.7

1

96

8.8

1

.92

6

1. 7

93

3

4.5

99

0

.33

6

27

.65

6

27

.66

7

1 1

84

4.0

1

86

7.4

2

.00

3

1.8

78

3

4.5

85

0

.33

6

27

.63

9

27

.64

9

P0

4-0

NF

S

i04

-0N

F

N03

-0N

F

TSM

(u

mo

l/L

) (u

mo

l/L

) (u

mo

l/L

) (u

g/l

) ---------~-----------------------------

3.1

14

92

8

18

7.3

47

4

0 2

3.4

8

3.0

95

18

0

18

7.6

14

4

0 2

1. 7

6

w

3.1

20

34

3

18

5.4

66

0

0 2

2.5

2

~

2.7

71

25

5

18

3.8

33

7

0 2

5.2

4

2.7

86

43

7

18

7.3

80

1

0 2

3.8

7

2.8

76

47

0

18

6.0

92

6

0 2

1.1

9

2.6

82

07

2

18

2.9

03

3

0 1

9.3

6

3.0

56

53

4

18

2.4

77

3

0 1

0.1

3

3.1

66

52

7

18

3.7

80

3

0 9

.45

3

.25

65

59

1

82

.48

92

0

8.7

1

Page 39: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

w

VI

VEN

TS

19

94

-

AII

S

tati

on

V94

B02

R

Cast

03

21

JO

N

19

94

L

AT

: 44

5

9.2

7N

LO

NG

: 1

30

1

2.2

1W

Nis

kin

D

epth

D

epth

In

sit

u

Po

ten

tial

Tem

p.

Sali

nit

y

Sali

nit

y

Att

en

. S

igm

a-t

S

igm

a-t

S

igm

a-T

heta

si

gm

a-T

heta

(m)

(db

) T

emp.

T

emp.

M

om

(C

TD

) (B

ott

le)

(l/m

) (C

TD

) (B

ott

le)

(CT

D)

(Bo

ttle

)

10

2

22

7.3

2

25

7.6

1

.86

5

9 2

22

4.7

2

25

5.0

1

.86

5

8 2

19

8.0

2

22

7.7

1

.86

3

7 2

17

9.1

2

20

8.5

1

.86

2

6 2

15

1.1

2

18

0.0

1

.86

0

5 2

12

6.2

~154.7

1.8

59

4

21

01

. 4

21

29

.4

1.8

57

3

20

47

.2

20

74

.2

1.8

67

2

19

46

.7

19

71

.9

1.9

39

1

18

44

.3

18

67

.7

2.0

08

P04

-UN

F

Si0

4-U

NF

N

03-U

NF

TS

M

(um

ol/

L)

(um

ol/

I.)

(um

ol/

L)

(ug

/l)

----

----

----

----

----

----

----

----

----

---

3.1

14

92

8

18

7.3

47

4

0 3

.09

51

80

1

87

.61

44

0

3.1

20

34

3

18

5.4

66

0

0 2

.77

12

55

1

83

.83

37

0

2.7

86

43

7

18

7.3

80

1

0 2

.87

64

70

1

86

.09

26

0

2.6

82

07

2

18

2.9

03

3

0 3

.05

65

34

1

82

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73

0

3.1

66

52

7

18

3.7

80

3

0 3

.25

65

59

1

82

.48

92

0

1.7

09

3

4.6

21

3

4.6

20

1

. 7

09

3

4.6

22

1

. 70

9

34

.62

2

1. 7

10

34

.62

2

1.7

11

3

4.6

21

1

.71

2

34

.62

0

34

.61

8

1.7

12

3

4.6

19

1

. 72

6

34

.61

0

1.8

06

3

4.5

97

1

.88

3

34

.58

3

34

.58

7

0.3

46

0

.34

5

0.3

45

0

.34

5

0.3

45

0

.34

4

0.3

42

0

.33

7

0.3

36

0

.33

6

27

.67

9

27

.67

9

27

.68

0

27

.68

0

27

.67

9

27

.67

8

27

.67

8

27

.67

0

27

.65

4

27

.63

7

27

.67

8

27

.67

7

27

.64

0

27

.69

1

27

.69

1

27

.69

1

27

.69

1

27

.69

0

27

.69

0

27

.68

9

27

.68

0

27

.66

4

27

.64

7

27

.69

0

27

.68

8

27

.65

0

Page 40: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

w

01

-

VEN

TS

19

94

-

All

S

tati

on

V94

B03

C

ast

04

21

JO

N

19

94

L

AT

: 44

5

4.0

N

LON

G:

13

0

14

.58

W

Nis

kin

D

epth

D

epth

In

sit

u

Po

ten

tial

Tem

p.

Sali

nit

y

Sali

nit

y

Att

en

. S

igm

a-t

S

igm

a-t

S

igm

a-T

heta

S

igm

a-T

heta

t

(m)

(db

) T

emp.

T

emp.

A

nom

(C

TD

) (B

ott

le)

(11m

) (C

TD

) (B

ott

le)

(CT

D)

(Bo

ttle

)

10

2

25

3.4

2

29

4.2

1

. 952

1

.69

4

9 2

20

0.0

2

22

9.9

1

.85

3

·1.6

99

8

22

27

.1

22

57

.4

1.8

49

1

.69

3

7 2

17

4.0

2

20

3.3

1

.85

3

1. 7

02

6

21

50

.3

21

79

.2

1. 9

51

1.7

02

5

21

29

.6

21

58

.1

1.9

49

1

. 70

2

4 2

10

3.6

2

13

1.6

1

. 94

5

1.7

00

3

20

51

.5

20

78

.5

1.8

67

1

. 72

6

2 1

94

3.6

1

96

8.8

1

. 95

1

1.9

19

1

18

48

.1

18

71

.5

2.0

30

1

.90

4

P04

-UN

F

Si0

4-U

NF

N

03-U

NF

TS

M

(um

ol/

L)

(um

ol/

L)

(um

ol/

L)

(uq

/l)

----

----

----

----

----

----

----

----

----

---

2.8

73

07

2

18

8.8

84

5

0 1

5.4

8

2.9

73

09

4

18

3.8

27

7

0 1

6.2

3

2.9

73

29

7

18

6.4

98

0

0 1

9.4

3

2.7

04

04

9

18

1.7

80

1

0 1

8.7

5

2.6

69

33

1

18

2.9

04

1

0 1

6.3

2

2.7

69

34

4

18

3.3

41

0

0 1

8.5

0

2.7

29

63

6

18

1.3

69

2

0 1

8.4

5

2.9

84

33

9

18

1.1

17

2

0 8

.44

2

.96

95

81

1

81

. 38

16

0

9.3

8

3.0

54

62

3

17

9.9

23

4

0 7

.83

34

.62

2

34

.62

2

34

.62

2

34

.62

2

34

.62

2

34

.62

2

34

.61

6

34

.61

1

34

.59

5

34

.58

1

34

.62

2

34

.61

6

34

.59

6

0.3

42

0

.34

1

0.3

41

0

.34

1

0.3

41

0

.34

1

0.3

88

0

.33

6

0.3

36

0

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6

27

.68

0

27

.68

0

27

.68

1

27

.68

0

27

.68

1

27

.68

1

27

.67

6

27

.67

0

27

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1

27

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4

27

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0

27

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6

27

.65

2

27

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3

27

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2

27

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3

27

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2

27

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2

27

.69

2

27

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7

27

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1

27

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1

27

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4

27

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3

27

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7

27

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2

Page 41: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

w

......

VEN

TS

19

94

-

All

S

tati

on

V94

B04

C

ast

0

5

22

JO

N

19

94

L

AT

: 44

5

7.8

3N

LO

NG

: 1

30

1

3.0

2W

Nis

kin

D

epth

D

epth

In

sit

u

Po

ten

tial

Tem

p.

Sali

nit

y

Sali

nit

y

Att

en

. S

igm

a-t

S

igm

a-t

S

igm

a-T

heta

S

igm

a-T

heta

t

(m)

(db

) T

emp.

T

emp.

A

nom

(C

TD

) (B

ott

le)

(11m

) (C

TD

) (B

ott

le)

(CT

D)

(Bo

ttle

)

10

2

25

2.3

2

28

3.1

1

.87

0

9 2

22

4.7

2

25

5.0

1

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8

22

01

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22

31

. 0

1. 8

65

7

21

75

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22

04

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1.8

77

6

21

49

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21

77

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1.8

74

5

21

24

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21

52

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1.8

78

4

20

98

.5

21

26

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1.8

76

3

19

97

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20

23

.9

1. 9

10

2

19

48

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19

73

.5

1.9

41

1

18

44

.8

18

68

.2

2.0

19

P04

-UN

F

Si0

4-U

NF

N

03-U

NF

TS

M

(um

ol/

L)

(um

ol/

L)

(um

ol/

L)

(ug

/l)

----

----

----

----

----

----

----

----

----

---

3.1

15

24

6

18

6.4

70

1

0 1

7.3

2

3.1

15

45

9

18

7.0

77

6

0 1

9.4

8

2.8

56

19

1

19

0.7

64

8

0 1

8.1

9

3.0

16

08

3

18

4.0

15

7

0 2

5.7

3

2.9

81

36

6

18

4.9

65

2

0 2

0.6

7

3.0

16

50

8

18

8.4

84

4

0 2

2.0

7

2.9

66

82

0

18

7.0

37

7

0 2

2.4

0

3.1

66

63

3

18

3.7

04

3

0 8

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3

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21

75

1

82

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74

0

7.5

5

3.2

06

97

7

17

9.0

88

1

0 9

.29

1. 7

11

34

.62

2

1. 7

11

3

4.6

22

1

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1

34

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1

1.7

25

3

4.6

22

1

.72

5

34

.62

1

1. 7

31

3

4.6

21

1

. 731

3

4.6

21

1

.77

3

34

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3

1.8

08

3

4.5

97

1

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Page 42: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

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Page 43: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

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19

94

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All

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Page 44: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

~

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Page 45: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

19

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Page 46: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

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Page 47: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

19

94

-

AII

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tati

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Page 48: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

t

VEN

TS

19

94

-

All

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Page 49: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

t;

VEN

TS

1994

-

All

S

tati

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ast

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01

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Page 50: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

~

VEN

TS

19

94

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Page 51: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

19

94

-

All

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tati

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Page 52: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

-'='"

00

VEN

TS

1994

-

All

S

tati

on

V94

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ast

17

03

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1994

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T:

46

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129

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kin

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TD)

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1m)

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65

Page 53: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

.e:..

100

VEN

TS

19

94

-

All

S

tati

on

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R

cast

18

0

5

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99

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T:

46

0

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7N

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NG

: 1

29

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.61W

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kin

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epth

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sit

u

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p.

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P04

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Si0

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NF

N

03-0

NF

TS

M

(um

ol/

L)

(um

ol/

L)

(um

ol/

Ll

(ug

/l)

----

----

----

----

----

----

----

----

----

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3.1

19

67

8

18

3.7

47

8

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3

3.1

34

58

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53

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44

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89

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27

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27

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6

Page 54: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

19

94

-

All

St~tion

T94

B08

C

ast

1

9

05

JU

L

19

94

L

AT

: 4

6

06

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N

LON

G:

12

9

50.0

3W

Nis

kin

D

epth

D

epth

In

sit

u

Po

ten

tial

Tem

p.

Sali

nit

y

Sali

nit

y

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en

. S

igm

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igm

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igm

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si

gm

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) T

emp.

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ott

le)

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10

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2

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54

7

20

27

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20

54

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1.9

73

1

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2

34

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6

0.3

37

2

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50

2

7.6

61

6

19

90

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20

16

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1.9

78

1

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1

34

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6

0.3

41

2

7.6

50

2

7.6

60

5

19

92

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20

18

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1.9

67

1

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0

34

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7

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42

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7.6

51

2

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62

4

19

13

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19

38

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1.9

97

1

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6

34

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6

0.3

38

2

7.6

48

2

7.6

59

3

20

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20

98

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1.9

48

1

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4

34

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2

0.3

35

2

7.6

57

2

7.6

68

2

19

99

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20

26

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1. 9

39

1

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1

34

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0

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35

2

7.6

56

2

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67

1

20

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15

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1.7

93

3

4.6

04

0

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5

27

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9

27

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1

P04

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F

Si0

4-U

NF

N

03-U

NF

TSM

(u

mo

l/L

) (u

mo

l/L

) (u

mo

l/L

) (u

g/l

) --

----

----

----

----

----

----

----

----

----

-1

.75

29

55

1

80

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49

0

8.3

1

2.2

05

83

5

18

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38

9

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VI

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36

42

4

18

1.2

93

9

0 7

.62

0

1.4

91

93

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18

3.7

61

9

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2.0

45

41

4

18

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76

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42

96

3

18

6.1

73

0

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6

2.6

99

67

3

18

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94

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36

72

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09

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Page 55: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

1994

-

All

st

ati

on

V94

B10

east

20

07

JU

L 19

94

LAT:

46

1B

.45N

LO

NG

: 12

9 42

.50W

Nis

kin

D

epth

D

epth

In

situ

P

ote

nti

al

Tem

p.

Sali

nit

y

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nit

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en

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igm

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t S

igm

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D)

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10

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65

2

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63

2

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2

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21

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01

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21

52

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1. B

1

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7

1. 7

76

34

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9

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2

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2

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2

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10

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F TS

M

(um

ol!L

) (u

mol

/L)

(um

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) (u

g/l

) --

----

----

----

----

----

----

----

----

----

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. B11

339

18

7.4

35

5

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23

0

Page 56: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

1994

-

LEG

I

Sta

tio

n V

94C

Ol

Cas

t 01

29

JU

L 19

94

LAT:

44

57

.9N

LO

NG

: 13

0 12

.7W

Nis

kin

D

epth

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epth

In

situ

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ote

nti

al

Tem

p.

t (m

) (d

b)

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m

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nit

y

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nit

y

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en.

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ma-

t S

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(eT

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(Bo

ttle

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1m)

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) (B

ott

le)

(eT

D)

(Bo

ttle

) --

----

----

----

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----

----

----

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----

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----

----

----

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----

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----

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----

----

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22

33

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22

63

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1.8

79

1

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2574

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4.6

19

34

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27

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1.0

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3

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3

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16

6

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68

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2

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2

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2

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3

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75

2

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2

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21

50

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79

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1.8

84

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3

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9

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27

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20

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3

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27

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27

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27

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95

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16

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14

1

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0.0

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5

34

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34

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15

0

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8

27

.61

4

27

.61

1

27

.62

3

27

.62

0

TSM

(u

g/l

) --

----

---

VI

IV

D-T

het

a (r

ows

1 to

11)

-

(pte

mp

+

(4.7

7851

*

pden

» -

13

3.9

86

7

Page 57: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

" V

ENTS

19

94

-LE

G

I S

tati

on

T94

C01

C

ast

02

30

JUL

19

94

LAT:

45

10

.20N

LO

NG

: 13

0 06

.24W

Nis

kin

D

epth

D

epth

In

situ

P

ote

nti

al

Tem

p.

Sali

nit

y

Sali

nit

y

Att

en

. S

igm

a-t

Sig

ma-

t S

igm

a-T

het

a S

igm

a-T

het

a t

(m)

(db)

T

emp.

T

emp.

M

om

(CTD

) (B

ott

le)

(11m

) (C

TD)

(Bo

ttle

) (C

TD)

(Bo

ttle

)

1 2

14

4.5

2

11

3.1

1

.85

2

1.7

03

0

.00

78

70

3

4.6

14

3

4.6

10

7

0.3

57

2

7.6

74

2

7.6

71

2

7.6

85

2

7.6

83

2

22

12

.1

22

42

.0

1.8

43

1

.68

9

0.0

25

40

5

34

.62

1

34

.61

65

0

.36

1

27

.68

0

27

.67

7

27

.69

2

27

.68

8

3 2

17

6.8

2

20

6.0

1

.84

4

1.6

93

0

.02

41

61

3

4.6

20

3

4.6

15

7

0.3

61

2

7.6

79

2

7.6

76

2

7.6

91

2

7.6

88

4

21

55

.5

21

84

.3

1.8

41

1

.69

2

0.0

15

75

9

34

.61

8

34

.61

61

0

.35

7

27

.67

8

27

.67

7

27

.68

9

27

.68

8

5 2

19

2.6

2

22

2.1

1

.83

9

1. 6

86

0.0

20

13

6

34

.62

0

34

.61

72

0

.35

8

27

.68

0

27

.67

8

27

.69

1

27

.68

9

6 2

22

6.5

2

25

6.6

1

.84

5

1.6

89

0

.02

58

55

3

4.6

21

3

4.6

17

9

0.3

59

2

7.6

80

2

7.6

78

2

7.6

92

2

7.6

90

7

22

61

.4

22

92

.2

1.8

53

1

.69

4

0.0

28

90

2

34

.62

1

34

.61

61

0

.35

7

27

.68

0

27

.67

6

27

.69

2

27

.68

8

8 2

25

2.9

2

28

3.6

1

.85

2

1.6

94

0

.02

87

53

3

4.6

21

3

4.6

16

2

0.3

58

2

7.6

80

2

7.6

76

2

7.6

92

2

7.6

88

9

21

68

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21

97

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1.8

61

1

.71

0

0.0

31

44

8

34

.61

9

34

.61

44

0

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8

27

.67

7

27

.67

4

27

.68

9

27

.68

5

10

22

29

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22

59

.9

1.8

67

1

.71

1

0.0

39

47

5

34

.62

1

0.3

59

2

7.6

78

2

7.6

90

11

2

21

0.5

2

24

0.4

1

.86

7

1. 7

12

0.0

36

70

0

34

.62

0

0.3

59

2

7.6

78

2

7.6

90

12

2

17

5.3

2

20

4.5

1

.86

7

1.7

15

0

.03

86

73

3

4.6

20

0

.36

0

27

.67

8

27

.68

9

13

2

20

7.9

2

23

7.6

1

.87

5

1.7

20

0

.04

57

18

3

4.6

21

3

4.6

16

1

0.3

60

2

7.6

78

2

7.6

74

2

7.6

90

2

7.6

86

14

2

14

0.3

2

16

8.8

1

.88

3

1. 7

34

0.0

46

78

9

34

.61

9

34

.61

48

0

.36

4

27

.67

6

27

.67

2

27

.68

7

27

.68

4

15

21

94

.2

22

23

.8

1.8

41

1

. 688

0

.02

12

99

3

4.6

20

0

.35

7

27

.68

0

27

.69

1

16

21

73

.8

22

03

.0

1.8

39

1

. 688

0

.01

73

32

3

4.6

19

0

.35

6

27

.67

9

27

.69

1

17

18

77

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19

01

. 4

1.9

67

1

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9

0.0

09

36

5

34

.59

2

0·.3

53

27

.64

7

27

.65

7

U\

IN

TSM

(u

g/l

) --

----

---

13

.33

1

6.2

4

27

.07

1

5.3

1

13

.22

2

2.0

0

14

.26

4

0.0

0

17

.37

19

.58

2

0.0

7

D-T

het

a (r

ows

1 to

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-

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04

63

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» -

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13

5

Page 58: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

1994

-

LEG

I

Sta

tio

n T

94C

02

Cas

t 03

31

JU

L 19

94

LAT:

44

5

7. 7

4N

LON

G:

130

12.4

6W

Nis

kin

D

epth

D

epth

In

sit

u

Po

ten

tial

Tem

p.

Sali

nit

y

Sali

nit

y

Att

en

. S

igm

a-t

Sig

ma-

t S

igm

a-T

het

a S

igm

a-T

het

a t

(m)

(db

) T

emp.

'T

emp.

A

nom

(C

TD)

(Bo

ttle

) ( 1

1m)

(CTD

) (B

ott

le)

(CTD

) (B

ott

le)

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

---

1 2 3 4 5 6 7 8 9 10

TSM

(u

qll)

9.5

0

9.8

1

VI

9.8

0

~

37

.79

3

2.8

9

26

.51

36

.77

1

5.6

9

21

78

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22

07

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19

39

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19

64

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20

55

.0

20

82

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21

28

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21

57

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18

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21

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20

75

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21

33

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61

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20

98

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21

26

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22

09

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82

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22

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58

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49

1.8

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0

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28

00

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96

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50

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3

4.6

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0

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4.6

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1

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1.7

32

0

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3

4.6

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1

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1. 7

37

0.0

33

86

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34

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1.8

77

1

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0.0

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22

7

34

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6

1.8

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1

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0

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46

3

4.6

17

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het

a (r

ow

s 1

to

10)

-(p

tem

p +

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.66

83

23

*

pd

en))

-

13

0.9

50

3

34

.59

94

0

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6

27

.67

6

27

.66

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27

.68

8

27

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3

34

.59

37

0

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9

27

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2

27

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0

27

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27

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27

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27

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3

34

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0

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27

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27

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27

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27

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34

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0

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27

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27

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27

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27

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34

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0

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27

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27

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27

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2

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74

2

7.6

74

2

7.6

51

2

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2

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3

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4

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2

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2

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2

7.6

84

0

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3

27

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5

27

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6

Page 59: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

01

0

1

VEN

TS

19

94

-

LEG

I

Sta

tio

n T

94C

03

Cast

04

01

A

UG

1

99

4

LA

T:

45

0

6.4

8N

LO

NG

: 1

30

0

5.8

2W

Nis

kin

D

epth

D

epth

In

sit

u

Po

ten

tial

Tem

p.

Sali

nit

y

Sali

nit

y

Att

en

. S

igm

a-t

S

igm

a-t

S

igm

a-T

heta

S

igm

a-T

heta

t

(m)

(db

) T

emp.

T

emp.

A

nom

(C

TP

) (B

ott

le)

(11m

) (C

TD

) (B

ott

le)

(CT

O)

(Bo

ttle

)

1 1

94

6.0

1

97

1.2

1

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7

1.8

04

0

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56

3

4.5

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2

19

63

.8

19

89

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1. 9

27

1.7

93

0

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33

25

3

4.5

99

3

20

92

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21

20

.3

1.8

73

1

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8

0.0

11

17

6

34

.61

0

4 2

31

2.9

2

34

4.9

1

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8

1.6

84

0

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52

41

3

4.6

21

5

21

03

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21

31

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1.8

70

1

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5

0.0

10

53

6

34

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21

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1.6

94

0

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75

88

3

4.6

18

7

17

96

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18

19

.1

2.0

50

1

.92

8

0.0

10

25

2

34

.57

7

TSM

(u

g/l

) --

----

---

D-T

heta

(r

ow

s 1

to

2)

-(p

tem

p +

(4

.78

33

33

*

pd

en»

-

13

4.1

17

7

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heta

(r

ow

s 3

to

4)

-(p

tem

p

+

(4.7

83

33

3 *

pd

en»

-

13

4.1

21

2

D-T

heta

(r

ow

s 5

to

6)

-(p

tem

p

+

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83

33

3 *

pd

en»

-

13

4.1

23

2

34

.59

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0

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8

27

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4

27

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1

27

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4

27

.66

2

0.3

58

2

7.6

56

2

7.6

67

3

4.5

94

9

0.3

57

2

7.6

69

2

7.6

57

2

7.6

80

2

7.6

68

3

4.6

06

2

0.3

60

2

7.6

80

2

7.6

68

2

7.6

92

2

7.6

81

3

4.6

18

8

0.3

56

2

7.6

70

2

7.6

76

2

7.6

81

2

7.6

88

0

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27

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2

7.6

29

2

7.6

38

Page 60: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

~

VEN

TS

1994

-

LEG

I

Sta

tio

n T

94C

04

Cas

t 05

01

AU

G 19

94

LAT:

45

0

1. 2

0N

LON

G:

130

17.9

3W

Nis

kin

D

epth

D

epth

In

situ

P

ote

nti

al

Tem

p.

Sali

nit

y

Sali

nit

y

Att

en.

Sig

ma-

t S

igm

a-t

Sig

ma-

Th

eta

Sig

ma-

Th

eta

t (m

) (d

b)

Tem

p.

Tem

p.

Ano

m

(eTD

) (B

ott

le)

(11m

) (e

TD)

(Bo

ttle

) (e

TD

) (B

ott

le)

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

---

1 2 3 4 5 6 7 9 9

TSM

(u

q/l

)

22

.75

2

8.6

5

31.7

1 2

6.7

5

14

.56

1

7.5

7

12

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3

1.3

6

21

28

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21

56

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21

25

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21

53

.8

21

09

.0

21

37

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21

26

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21

54

.7

21

32

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216'

1.1

21

11

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21

40

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34

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84

1

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6

0.0

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1

34

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3

1.8

80

1

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0

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10

50

3

4.6

09

1

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6

1.7

29

0

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50

99

3

4.6

11

1

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6

1.7

27

0

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09

53

3

4.6

13

1

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5

1.6

88

0

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37

36

3

4.6

19

D-T

het

a (r

ows

1 to

9)

-

(pte

mp

+

(4.5

21

42

1 *

pden

» -

126.

8713

4

34

.61

06

0

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9

27

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27

.68

3

27

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34

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0

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1

27

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27

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4

27

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34

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0

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27

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3

27

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27

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0

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0

27

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27

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27

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34

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0

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27

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1

27

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27

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27

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34

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78

0

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6

27

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8

27

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27

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27

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34

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0

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27

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27

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4

34

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32

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9

27

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4

27

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0

27

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6

Page 61: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

1994

-

LEG

I

Sta

tio

n T

94C

05

Cas

t 06

02

AU

G 19

94

LAT:

44

50

.36N

LO

NG

: 13

0 08

.08W

Nis

kin

D

epth

D

epth

In

situ

P

ote

nti

al

Tem

p.

Sali

nit

y

Sali

nit

y

Att

en

. S

iqrn

a-t

Sig

ma-

t S

igm

a-T

het

a S

igm

a-T

het

a t

(m)

(db)

T

emp.

T

emp.

A

nom

(C

TD)

(Bo

ttle

) (l

Im)

(CTD

) (B

ott

le)

(CTD

) (B

ott

le)

1 2

45

2.1

2

48

6.8

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27

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34

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0

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27

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6

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0

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3

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3

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4

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2

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2

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27

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9

27

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5

27

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1

27

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7

5 2

15

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2

17

9.6

1

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3

1.6

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0

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70

77

3

4.6

14

3

4.6

07

7

0.3

55

2

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75

2

7.6

70

2

7.6

86

2

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6

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1

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5

0.0

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08

6

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0

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0

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5

27

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0

27

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27

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27

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0

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2

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4

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0.0

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5

34

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0

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5

27

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4

27

.66

3

27

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5

27

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4

8 2

00

1.5

2

02

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1

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8

1.7

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0

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55

91

3

4.6

00

3

4.5

98

6

0.3

55

2

7.6

58

2

7.6

57

2

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69

2

7.6

68

9

19

02

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19

27

.0

1.9

66

1

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6

0.0

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8

34

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0

34

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0

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5

27

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6

27

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4

27

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6

27

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17

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0

34

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0

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6

27

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9

27

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8

27

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9

27

.61

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11

20

85

.0

21

12

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1.8

65

1

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1

0.0

28

62

7

34

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5

34

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0

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9

27 ..

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27

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1

27

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5

27

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2

12

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26

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21

54

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1.8

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1

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5

0.0

34

47

4

34

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6

34

.61

37

0

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3

27

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27

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27

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27

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0

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3

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3

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27

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1

27

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9

27

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27

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0

TSM

ti

l (u

ql1

) .....

--

----

---

17

.63

1

2.0

0

15

.32

9

.24

9

.53

8

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1

0.1

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D-T

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a (r

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1 to

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) -

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mp

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96

21

2 *

pden

» -

12

8.9

37

9

Page 62: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VI

00

VEN

TS

19

94

-

LEG

I

Sta

tio

n

T94

C06

C

ast

07

0

3 A

UG

1

99

4

LA

T:

45

0

2.5

3N

LO

NG

: 1

30

1

0.4

2W

Nis

kin

D

epth

D

epth

In

sit

u

Po

ten

tial

Tem

p.

Sali

nit

y

Sali

nit

y

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en

. S

igm

a-t

S

igm

a-t

S

igm

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S

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a-T

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i

(m)

(db

) T

emp.

T

emp.

A

nom

3 4 5 8 9 8 1

1

12

TSM

(u

g/l

)

17

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3.5

0

24

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1

0.4

6

8.7

9

8.9

9

8.9

0

22

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95

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21

48

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20

44

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00

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90

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1

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34

7

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8

Page 63: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

19

94

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LEG

I

Sta

tio

n

T94

C07

C

ast

08

0

4

AU

G

19

94

L

AT

: 46

0

6.9

9N

LO

NG

: 1

29

4

9.6

2W

Nis

kin

D

ep

th

Dep

th

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u

Po

ten

tial

Tem

p.

Sali

nit

y

Sali

nit

y

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en

. S

igm

a-t

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a-t

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igm

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heta

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t

(m)

(db

) T

emp

. T

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. A

nom

(C

TD

) (B

ott

le)

(11m

) (C

TD

) (B

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(CT

D)

(Bo

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)

1 2

05

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3

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10

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3

4.6

05

3

4.6

02

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20

0

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0

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27

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27

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02

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1

27

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27

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0

TSM

(u

g/l

) --

----

---

VI

1.0

D-T

heta

(ro

ws

1 to

1

2)=

pte

mp

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*p

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2.4

84

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en

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67

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9)

Page 64: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

19

94

-

LEG

I

Sta

tio

n T

94C

08

Cast

0

9

05

A

UG

1

99

4

LA

T:

46

3

0.0

6N

LO

NG

: 1

29

3

3.2

0W

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kin

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sit

u

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ten

tial

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p.

t (m

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27

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77

2

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94

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7.6

90

TSM

(u

g/l

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----

---

~

D~Th

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rows

1 to

6

)=p

tem

p-(

(13

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5)

Page 65: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

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94

-

LEG

I

Sta

tio

n T

94C

09

Cast

10

0

5 A

UG

1

99

4

LA

T:

46

17

.S1

N

LON

G:

12

9

40.3

3W

Nis

kin

D

epth

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sit

u

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ten

tial

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p.

i (m

) (d

b)

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m

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nit

y

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y

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si

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(C

TD)

(Bo

ttle

) (1

1m

) (C

TD)

(Bo

ttle

) (C

TD)

(Bo

ttle

) ------------------------------------------------------~------------------------------------------------------------------------

1 2

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2

11

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1

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90

0.0

23

32

6

34

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Page 66: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

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IV

VEN

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1994

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Page 67: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

1994

-

LEG

I

sta

tio

n

T9

4C

ll

Cas

t 12

06

AUG

19

94

LAT:

47

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Page 68: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

~

VE

NT

S 1

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Page 69: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

1994

-

LEG

I

Sta

tio

n V

94C

02

Cas

t 13

06

AUG

19

94

LAT:

47

42

.49N

LO

NG

: 12

7 47

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kin

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Page 70: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

19

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4

27

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2

27

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7

27

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5

11

2

29

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1

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7

34

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34

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60

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4

27

.69

0

27

.68

9

27

.70

2

27

.70

1

TSM

(u

q/l

) --

----

---

22

.63

~

29

.42

2

1.3

4

20

.95

1

8.3

5

12

.83

1

0.9

6

9.9

2

8.1

5

9.2

2

D-T

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(ro

ws

1 to

1

1)=

pte

mp

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61

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41

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en

)+(6

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32

19

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50

60

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)

Page 71: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VE

NT

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S

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T

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(11m

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34

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64

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34

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4

34

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27

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4

27

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1

27

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27

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5

5 2

59

8.4

2

63

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1

. 7

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1

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37

13

9

34

.64

4

34

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96

0

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6

27

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4

27

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0

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27

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61

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0

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60

35

3

4.6

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3

4.6

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2

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58

2

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02

2

7.6

99

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2

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14

7

25

58

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25

96

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1. 7

73

1

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0.0

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14

6

34

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0

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60

0

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27

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1

27

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27

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5

27

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0

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3

4.6

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1

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55

2

7.6

99

2

7.6

97

2

7.7

13

2

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11

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24

80

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15

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70

1

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0.0

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20

0

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34

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0

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27

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27

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27

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0

.35

5

27

.68

9

27

.68

6

27

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1

27

.69

9

TSM

(u

g/l

) --

----

---

01

~

22

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2

0.2

8

D-T

heta

(ro

ws

1 to

1

1)=

pte

mp

-«-3

09

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67

8*

pd

en

)+(5

.51

36

97

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den

**

2)+

43

48

.23

62

)

Page 72: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

19

94

-

LEG

I

Sta

tio

n V

94

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C

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6

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----

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----

----

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2

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71

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34

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0

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1

27

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5

27

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2

27

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9

27

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7

4 2

60

8.7

2

64

7.3

1

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1.5

79

0

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3

4.6

45

3

4.6

41

7

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70

2

7.7

05

2

7.7

03

2

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20

2

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17

5

26

00

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26

39

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1.7

66

1

.57

7

0.0

31

54

6

34

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5

34

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17

0

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9

27

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5

27

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3

27

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0

27

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6 2

58

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61

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1

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1

1.5

84

0

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3

4.6

43

3

4.6

39

8

0.3

63

2

7.7

03

2

7.7

01

2

7.7

18

2

7.7

15

7

25

59

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25

97

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72

1

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0.0

29

24

3

34

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2

34

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0

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27

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3

27

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0

27

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6

27

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4

8 2

52

9.4

2

56

6.3

1

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3

1.5

91

0

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25

51

3

4.6

39

3

4.6

35

9

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57

2

7.7

00

2

7.6

98

2

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14

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29

6

34

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34

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0

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27

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27

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5

27

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1

27

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10

2

39

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2

43

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1

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1.6

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0

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1

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27

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27

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0

TSM

(u

g/l

) --

----

---

25

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0'

1 2

7.3

5

00

2

8.2

9

27

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5

14

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1

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en

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en

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58

89

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11

)

Page 73: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

19

94

-

LEG

I

Sta

tio

n T

94C

12

Cast

1

7

07

AU

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19

94

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: 47

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: 1

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kin

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26

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18

1

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34

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0

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3

27

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27

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27

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59

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1

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3

1.5

88

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3

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11

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25

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26

27

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27

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1

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27

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TSM

(u

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----

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Page 74: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

.....,J

o

VEN

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19

94

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cast

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Page 75: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

~

VEN

TS

19

94

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(u

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25

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Page 76: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

...,J

~

VEN

TS

1994

-

LEG

I

Sta

tio

n V

94C

06

Cas

t 20

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94

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47

42

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: 12

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Page 77: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

19

94

-

LEG

I

Sta

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n V

94C

05

Cast

21

07

A

UG

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27

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Page 78: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

...... ~

VE

NT

S 1

99

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Page 79: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

-....l

Ul

VEN

TS

19

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2

7.7

12

8

24

45

.6

24

80

.8

1. 7

72

1

. 59

8

0.0

13

31

3

34

.63

5

34

.63

30

0

.35

5

27

.69

7

27

.69

5

27

.71

0

27

.70

8

TSM

(u

g/l

) --

----

---

D-T

heta

(ro

ws

1 to

8

)=p

tem

p-«

-60

5.8

73

06

*p

den

)+(1

0.8

64

10

6*

pd

en

**

2)+

84

48

.38

76

)

Page 80: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

-...I

0\

VEN

TS

1994

-

LEG

I

Sta

tio

n T

94C

17

Cas

t 24

OB

AU

G 19

94

LAT:

47

49

.32N

LO

NG

: 12

7 45

.49W

Nis

kin

D

epth

D

epth

In

sit

u

Po

ten

tial

Tem

p.

Sali

nit

y

Sali

nit

y

Att

en

. S

igm

a-t

Sig

ma-

t S

igm

a-T

het

a S

igm

a-T

het

a i

(m)

(db)

T

emp.

T

emp.

A

nom

1 25

41

25

78

.2

1.7

73

2

2621

2

65

9.8

1

.77

9

TSM

(u

g/l

)

23

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1

7.8

4

1.5

90

0.

0365

BO

1

. 5B

B

0.0

29

48

9

(CTD

) (B

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le)

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) (C

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(Bo

ttle

) (C

TD)

(Bo

ttle

)

34

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4

34

.64

11

0

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9

27

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4

34

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34

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00

0

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27

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2

27

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2

27

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0

27

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27

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6

27

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6

27

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5

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het

a(ro

ws

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2

)=p

tem

p-«

-54

0.0

54

34

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den

)+(9

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53

26

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den

**

2)+

75

37

.34

69

)

Page 81: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

-..J

-..J

VEN

TS

19

94

-

LEG

I

Sta

tio

n V

94C

10

Cast

2

5

08

AU

G

19

94

L

AT

: 47

4

3.3

8N

LO

NG

: 1

27

48

.46W

Nis

kin

D

epth

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epth

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sit

u

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tial

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p.

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nit

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nit

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. S

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a-t

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a-t

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S

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a-T

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i

(m)

(db

) T

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T

emp.

A

nom

1 2 3 4 5 6 7 8 9 1

0

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(u

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25

79

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26

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25

59

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25

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25

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24

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23

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23

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1.7

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9

0.0

29

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27

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27

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4.6

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9

27

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57

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7.6

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22

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den

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82

96

.00

47

)

Page 82: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

-..J

0

0

VEN

TS

19

94

-

LEG

I

Sta

tio

n

T94

C18

C

ast

2

6

09

AU

G

19

94

L

AT

: 47

4

1.5

3N

LO

NG

: 1

27

4

8.2

6W

Nis

kin

D

epth

D

epth

In

sit

u

Po

ten

tial

Tem

p.

Sali

nit

y

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en

. S

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igm

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t

(m)

(db

) T

emp.

T

emp.

A

nom

1 2 3 4 5 6 7 8 9 1

0

11

1

2

TSM

(u

g/l

) --

----

---

23

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4

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25

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25

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26

25

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26

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26

81

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1.7

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1

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25

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1

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0

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1

. 76

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1.5

84

0

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97

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52

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96

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1.6

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1

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80

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21

2

68

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1

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81

0

.03

31

18

(CT

D)

(Bo

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) (1

1m

) (C

TD

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le)

(CT

D)

(Bo

ttle

)

34

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5

34

.64

14

0

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1

27

.70

5

27

.70

2

27

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0

27

.71

7

34

.64

0

34

.63

83

0

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6

27

.70

2

27

.70

0

27

.71

5

27

.71

4

34

.63

4

34

.63

15

0

.35

4

27

.69

6

27

.69

4

27

.70

9

27

.70

7

34

.62

9

34

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68

0

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4

27

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2

27

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0

27

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4

27

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2

34

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5

34

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24

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3

27

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5

27

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3

27

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27

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9

27

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27

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1

27

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8

27

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5

34

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34

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6

27

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1

27

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27

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27

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2

34

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0

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27

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27

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27

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34

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34

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5

34

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0

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9

27

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5

27

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3

27

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27

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34

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5

34

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0

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0

27

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5

27

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2

27

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9

27

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6

D-T

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(ro

ws

1 to

1

2)=

pte

mp

-«-5

81

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06

7*

pd

en

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pd

en

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06

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88

)

Page 83: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

...J

\0

VEN

TS

1994

-

LEG

I

sta

tio

n T

94C

19

Cas

t 27

09

AU

G 19

94

LAT:

47

49

.95N

LO

NG

: 12

7 38

.08W

Nis

kin

D

epth

D

epth

In

sit

u

Po

ten

tial

Tem

p.

Sali

nit

y

Sali

nit

y

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en

. S

igm

a-t

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ma-

t S

igm

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het

a S

igm

a-T

het

a

* (m

) (d

b)

Tem

p.

Tem

p.

Ano

m

(CTD

) (B

ott

le)

(11

m)

(CTD

) (B

ott

le)

(CTD

) (B

ott

le)

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

---

1 2 3 4 5 6 7 8 9 10

12

13

1

4

TSM

(u

g/l

)

9.2

2

13

.41

14

.29

1

6.5

9

23

.53

2

8.8

9

22

.00

1

8.6

8

20

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24

83

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25

19

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25

63

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26

00

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25

62

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26

00

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25

31

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25

68

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24

86

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25

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25

92

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26

31

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25

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25

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26

04

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25

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25

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26

12

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25

72

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26

09

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25

85

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26

23

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25

78

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26

16

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1. 7

73

1.5

95

0

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52

83

3

4.6

36

3

4.6

33

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1. 7

74

1.5

89

0

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24

01

3

4.6

40

3

4.6

37

4

1. 7

73

1.5

88

0

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75

05

3

4.6

42

3

4.6

39

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1.5

87

0

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09

73

3

4.6

40

3

4.6

37

5

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67

1.5

89

0

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3

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3

4.6

34

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1.7

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1

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0.0

27

55

9

34

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3

34

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1

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72

6

34

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2

34

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03

1

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1

1.5

92

0

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32

62

3

4.6

43

3

4.6

40

3

1. 7

80

1.5

93

0

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43

20

3

4.6

43

3

4.6

40

5

1.7

78

1

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2

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11

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34

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3

34

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02

1

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01

0

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2

34

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1

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03

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27

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3

27

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1

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27

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17

Page 84: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

00

o

VEN

TS

1994

-

LEG

I

Sta

tio

n V

94C

12

Cas

t 28

09

AU

G 19

94

LAT:

47

5

5.0

1N

LO

NG

: 12

7 O

O.O

W

Nis

kin

D

epth

D

epth

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situ

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ote

nti

al

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p.

Sali

nit

y

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nit

y

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en

. S

igm

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ma-

t S

igm

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het

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gm

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het

a i

(m)

(db

) T

emp.

T

emp.

A

nom

(C

TD)

(Bo

ttle

) (1

1m

) (C

TD)

(Bo

ttle

) (C

TD)

(Bo

ttle

) --

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

-1 2 3 4 5 6 7 8 9

10

11

12

13

14

15

TSM

(u

g/l

)

35

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3

7.4

8

33

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3

4.0

7

23

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1

9.6

4

13

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1

0.7

4

14

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18

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24

95

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25

31

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24

95

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25

31

. 4

24

80

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25

16

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59

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24

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24

39

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24

74

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24

20

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23

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24

33

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24

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23

29

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21

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17

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17

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43

02

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4.6

44

3

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0

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3

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Page 86: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

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Page 87: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

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Page 88: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

19

94

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Page 89: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

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19

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Page 92: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

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19

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Page 94: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

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Page 95: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

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\0

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VEN

TS

19

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VEN

TS

19

94

-

LEG

II

I S

tati

on

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14

17

SE

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VEN

TS

19

94

-

LEG

II

I S

tati

on

V94

E12

C

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1

5

18

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99

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46

2

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i5:

Page 100: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

1994

-

LEG

II

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tati

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·

~

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VEN

TS

19

94

-

LEG

II

I S

tati

on

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cast

17

19

SE

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~

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VEN

TS

1994

-

LEG

II

I sta

tio

n V

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1 C

ast

01

20

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1994

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II

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on

V94

F01

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ast

01

2

0

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94

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I S

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on

V94

F02

east

02

20

SE

P 19

94

LAT:

44

58

.20N

LO

NG

: 13

0 12

.76W

Nis

kin

D

epth

D

epth

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sit

u

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ten

tial

Tem

p.

sali

nit

y

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nit

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en

. S

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a-t

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t S

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ott

le)

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ott

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(eT

D)

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1.4

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I S

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on

V94

F03

east

03

21

SE

P 19

94

LAT:

44

5

6.1

3N

LO

NG

: 13

0 40

.30W

Nis

kin

D

epth

D

epth

In

sit

u

Po

ten

tial

Tem

p.

Sali

nit

y

Sali

nit

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en

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igm

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t S

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(eT

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(Bo

ttle

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1m)

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D)

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ttle

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) (B

ott

le)

----

----

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3

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Page 106: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

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1994

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II

I S

tati

on

V94

F03

Cas

t 03

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SE

P 19

94

LAT:

44

5

6.1

3N

LO

NG

: 13

0 40

.30W

P04

-UN

FIL

P

04

-FIL

S

i04-

UN

FIL

S

i04

-FIL

TS

M

(um

ol!L

) (u

mol

!L)

(um

ol!L

) (u

mol

!L)

(ug

!l)

----

----

----

----

----

----

----

----

----

----

----

----

----

2.B

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1B

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2.

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1

84

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1

42

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Page 107: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

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TS

1994

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LEG

II

I sta

tio

n V

94F0

4 C

ast

04

21

SEP

1994

LA

T:

44

53.0

3N

LON

G:

131

07.9

7W

Nis

kin

D

epth

D

epth

In

situ

P

ote

nti

al

Tem

p.

Sali

nit

y

Sali

nit

y

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en

. S

igm

a-t

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ma-

t S

igm

a-T

het

a S

igm

a-T

het

a f

(m)

(db

) T

emp.

T

emp.

A

nom

(C

TD)

(Bo

ttle

) (1

1m)

(CTD

) (B

ott

le)

(CTD

I (B

ott

le)

----

----

----

----

----

----

----

----

----

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7

Page 108: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VE

NT

S 1

99

4

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G III

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tio

n V

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Cast

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~

3.2

09

1

40

.9

Page 109: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

1994

-

LEG

II

I S

tati

on

V94

F05

Cas

t 05

21

SE

P 19

94

LAT:

44

5

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: 13

1 34

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Nis

kin

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situ

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p.

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nom

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ttle

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1m)

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42

2

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44

2

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61

2

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63

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51

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2

Page 110: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

19

94

-

LEG

II

I S

tati

on

V94

F05

C

ast

0

5

21

SEP

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5

0.0

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NG

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31

3

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~

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Page 111: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

19

94

-

LEG

II

I S

tati

on

V94

F06

cast

06

21

SEP

1994

L

AT

: 44

4

2.8

9N

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: 1

32

43

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Nis

kin

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u

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94

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LEG

II

I S

tati

on

V94

F06

C

ast

0

6

21

SEP

19

94

L

AT

: 44

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NG

: 1

32

43

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0

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TS

1994

-

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I S

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on

V94

F07

cast

07

21

SEP

19

94

L

AT

: 44

3

7.0

5N

LO

NG

: 13

3 50

.94W

Nis

kin

D

epth

D

epth

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sit

u

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ten

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p.

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nit

y

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en

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t si

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Sta

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94F

07

Cast

07

21

SE

P 1

99

4

LA

T:

44

37

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N

LON

G:

13

3

50

.94

W

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FIL

P

04

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S

i04

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FIL

S

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(um

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on

V94

F08

C

ast

08

22

SEP

1994

LA

T:

44

29

.99

N

LON

G:

135

00.1

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kin

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sit

u

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ten

tial

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p.

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nit

y

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nit

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en

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(m)

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T

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nom

(C

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(Bo

ttle

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) (B

ott

le)

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9

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III

Sta

tio

n V

94F

08

Cast

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Page 117: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

1994

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Page 118: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

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Page 119: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

1994

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II

I S

tati

on

V94

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Page 120: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

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TS

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94

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II

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Page 121: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

1994

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III

Sta

tio

n V

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11

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76

2.8

1

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23

3

4.6

76

3

4.6

76

0

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93

2

7.7

49

2

7.7

49

2

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70

2

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70

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32

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33

47

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44

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91

34

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7

34

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0

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7

27

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27

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27

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Page 122: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VE

NT

S 1

99

4

-LE

G III

Sta

tio

n V

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11

Cast

1

1

23

SE

P 1

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IL

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IL

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TSM

(u

mol

/L)

(um

ol/L

) (u

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/L)

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Page 123: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

1994

-

LEG

II

I S

tati

on

V94

F12

Cas

t 12

23

SE

P 19

94

LAT:

42

35

.16N

LO

NG

: 14

0 05

.08W

Nis

kin

D

epth

D

epth

In

situ

P

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nti

al

Tem

p.

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nit

y

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nit

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en

. S

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a-t

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ma-

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a S

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a

* (m

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b)

Tem

p.

Tem

p.

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m

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ott

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(11

m)

(CTD

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ott

le)

(CTD

) (B

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82

3

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9

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52

2

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81

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7.6

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10

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13

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26

3

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13

3

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27

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40

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41

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3

4.4

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7.5

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2

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11

99

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2

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34

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6

27

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3

Page 124: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

19

94

-

LEG

II

I S

tati

on

V94

F12

cast

12

2

3

SEP

19

94

L

AT

: 42

3

5.1

6N

LO

NG

: 1

40

O

S.0

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4-U

NF

IL

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IL

Si0

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NF

IL

Si0

4-F

IL

TSM

(u

mo

l/L

) (u

mol

/L)

(um

ol/L

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1

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1

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.0

Page 125: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

1994

-

LEG

II

I S

tati

on

V94

F13

C

ast

13

23

SE

P 19

94

LA

T:

41

29

.99

N

LON

G:

141

29.9

8W

Nis

kin

D

epth

D

epth

In

sit

u

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ten

tial

Tem

p.

Sali

nit

y

Sali

nit

y

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en

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igm

a-t

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ma-

t S

igm

a-T

het

a S

igm

a-T

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a t

(m)

(db

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emp.

T

emp.

M

om

(C

TD)

(Bo

ttle

) (l

Im)

(CTD

) (B

ott

le)

(CTD

) (B

ott

le)

----

----

----

----

----

----

----

----

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----

----

----

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----

----

----

----

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----

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----

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----

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----

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----

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1 4

00

3.2

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07

3.3

1

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1

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2

34

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2

34

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0

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4

27

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4

27

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1

27

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7

27

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5

2 3

69

6.6

3

75

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1

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1

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6

34

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0

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0

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27

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27

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35

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56

3

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3

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69

6

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95

2

7.7

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2

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45

2

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64

2

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62

4

29

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48

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63

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52

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Page 126: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

19

94

-

LEG

II

I S

tati

on

V94

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C

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1

3

23

SE

P 1

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Page 127: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VE

NT

S 1

99

4

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III

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tio

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1

4

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Page 128: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

19

94

-

LEG

III

Sta

tio

n

V94

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ast

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24

SE

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Page 129: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

1994

-

LEG

II

I S

tati

on

V94

Fl5

C

ast

15

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TS

19

94

-

LEG

III

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VEN

TS

1994

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LEG

II

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tati

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19

94

-

LEG

III

Sta

tio

n v

94

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Page 133: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

1994

-

LEG

II

I S

tati

on

V94

F17

Cas

t 17

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SE

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37

30

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19

94

-

LEG

III

Sta

tio

n V

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Page 135: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

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Page 136: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

19

94

-

LEG

III

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tio

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Page 137: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

1994

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LEG

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Page 138: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

19

94

-

LEG

II

I S

tati

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Page 139: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

1994

-

LEG

II

I S

tati

on

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1

Page 140: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

19

94

-

LEG

III

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Page 141: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

1994

-

LEG

II

I S

tati

on

V94

F21

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t 21

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SE

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33

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1

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VEN

TS

19

94

-

LEG

II

I S

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ast

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Page 143: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VE

NT

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99

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III

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8

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on

V94

F22

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22

27

SEP

19

94

L

AT

: 32

3

0.0

3N

LO

NG

: 1

55

00

.07W

P04

-UN

FIL

P

04

-FIL

S

i04

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FIL

S

i04

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TS

M

(um

ol/

L)

(um

ol/

L)

(um

ol/

L)

(um

ol/

L)

(ug

/l)

2.4

51

1

54

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2.4

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1

59

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2.5

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67

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3.1

26

1

52

.3

.....

3.1

82

1

43

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~

3.1

90

1

30

.7

0

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V94

F23

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27

SEP

1994

L

AT

: 30

5

0. I

ON

LO

NG

: 1

55

00

.03W

Nis

kin

D

epth

D

epth

In

sit

u

Po

ten

tial

Tem

p.

Sali

nit

y

Sali

nit

y

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en

. S

igm

a-t

Sig

ma-

t S

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a-T

het

a si

gm

a-T

heta

* (m

) (d

b)

Tem

p.

Tem

p.

Ano

m

(CTD

) (B

ott

le)

(11

m)

(CTD

) (B

ott

le)

(CTD

) (B

ott

le)

------------------~---------------------------------------------------------------------------------------------------------

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Page 146: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

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TS

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II

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on

V94

F23

C

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23

27

SE

P 1

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4

LA

T:

30

50

.10

N

LON

G:

15

5

00.0

3W

, P

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NF

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IL

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(um

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(um

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(um

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(um

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/l)

2.5

24

1

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50

1

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94

1

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3

14

1.3

~

N

3.2

00

1

29

.2

Page 147: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

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1994

-

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II

I S

tati

on

V94

F24

Cas

t 24

28

SE

P 19

94

LA

T:

29

09

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N

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155

00.0

3W

Nis

kin

D

epth

D

epth

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sit

u

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ten

tial

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p.

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nit

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nit

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en

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ma-

t S

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a S

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a ..

(m)

(db)

T

emp.

T

emp.

A

nom

(C

TD)

(Bo

ttle

) ( 1

1m)

(CTD

) (B

ott

le)

(CTD

) (B

ott

le)

----

----

----

----

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----

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----

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1 5

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04

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3

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F24

C

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P 1

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4

LA

T:

29

0

9.8

SN

LO

NG

: 1

55

00

.03W

P0

4-0

NF

IL

P0

4-F

IL

Si0

4-0

NF

IL

Si0

4-F

IL

TSM

(u

mo

l/L

) (u

mo

l/L

) (u

mo

l/L

) (u

mo

l/L

) (u

g/l

)

2.4

14

1

49

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2.4

27

1

51

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2.5

52

1

66

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2.6

25

1

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2.7

05

1

71

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2.7

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1

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7.6

0

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3

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2

2.8

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1

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12

1

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67

1

29

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- t

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1994

-

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II

I S

tati

on

V94

F25

C

ast

25

28

SEP

1994

LA

T:

27

29.9

1N

LON

G:

15

5

00.1

4W

Nis

kin

D

epth

D

epth

In

situ

P

ote

nti

al

Tem

p.

Sali

nit

y

Sali

nit

y

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en

. S

igm

a-t

Sig

ma-

t S

igm

a-T

het

a S

igm

a-T

het

a t

(m)

(db

) T

emp.

T

emp.

A

nom

(C

TD)

(Bo

ttle

) (1

1m

) (C

TD)

(Bo

ttle

) (C

TD)

(Bo

ttle

) --

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

----

--1

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Page 150: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

TS

19

94

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Page 151: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

VEN

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VE

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Page 160: Vents 1994 Cleft and Coaxial Segment plume monitoring ... · the Blanco Fracture Zone and on the north by the Sovanco Fracture Zone. As part of the continuing VENTS Program research

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