by - usgs · 2011-01-14 · u.s. department of the interior u.s. geological survey...

U.S. DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY

AUDIO-MAGNETOTELLURIC DATA COLLECTED IN THE BEATTY, NEVADA AREA

By

Jackie M. Williams

Denver, Colorado

Open-File Report 98-231

1998

This report is preliminary and has not been edited or reviewed for conformity with the U.S. Geological Survey editorial standards. Any use of trade names is for descriptive purposes only and does not imply endorsement by the U.S. Geological Survey.

AUDIO-MAGNETOTELLURIC DATA COLLECTED IN THE AREA OF BEATTY, NEVADA

Jackie M. Williams,U.S. Geological Survey

1997

INTRODUCTION

In the summer of 1997, electrical geophysical data was collected north of Beatty, Nevada. Audio-magnetotellurics (AMT) was the geophysical method used to collect 16 stations along two (2) profiles. The purpose of this data collection was to determine the depth to the alluvial basement, based upon the needs of the geologists requesting the data.

DATA

The data was collected using the MT-1 magnetotelluric system (equipment and computer programs) of ElectroMagnetic Instruments, Inc. This system employs simultaneous orthogonal electric field and magnetic field measurements along with a remote station of either an electrical or magnetic field. We used a local remote that was less than 100 meters from the main station setup. This remote station allows for remote-reference noise cancellation which helps prevent bias of the data from noise created by power lines, radio antenna, or other cultural frequencies. Also, a vertical magnetic coil was used to collect tipper data which allows us to better determine the electrical strike direction.

Data was collected over five (5) ranges of frequency bands. The frequency bands used were, 1-170 Hz, 79-580 Hz, 340-3550 Hz, 885-23370 Hz and 1170-5210 Hz (to collect additional data at the weakest frequencies, the dead band). AMT methods correspond with those used in magnetotelluric (MT) methods (Cagniard, 1953: Vozoff, 1991), but occur at higher frequencies than the lower frequencies of MT . AMT signals originate mainly from atmospheric disturbances and MT signals occur from ionospheric phenomena.

Please, note in the models, that there are gaps in the data at the high frequency end, this is the result of weak signals at some frequencies. Data has not been edited to produce smooth Bostick inversions, but has been edited to eliminate noisy data and repeated data at various frequencies.

Why Use AMT ?

Measurement of earth resistivities can be an effective means of mapping geologic structures because of the large variation in the electrical resistivity of rocks, and in many instances, can be used to determine whether the rocks are intrusive, volcanic, sedimentary, or metamorphic. Alteration and fault zones can also be mapped. The resistivity of geologic units is largely dependent upon their fluid content, porosity, fracturing, temperature, and conductive mineral

1

content (Keller and Frischknecht, 1966).

Unaltered, unfractured crystalline rocks are normally very resistive (typically 1,000 ohm-m or greater), whereas faults will show low resistivity (less tan 100 ohm-m) when they are comprised of rocks fractured enough to have hosted fluid transport. Marine sedimentary rocks and clay-rich alluvium are normally very conductive (a few ohm-m to tens of ohm-m). Metamorphic rocks, including gneiss, schist (non-graphitic), and marble are moderately to highly resistive (hundreds to thousands of ohm-m). Tables of electrical resistivity for a variety of rocks, minerals and geological environments may be found in Keller, 1987; Olheoft, 1980; and Palacky, 1987.

References

Cagniard,L., 1953, Basic theory of the magnetotelluic method: Geophysics, v. 18, no.3,p. 605-635.

EMI, ElectroMagnetic Instruments, Inc., MT-1 Magnetotelluric System Operation Manual, v.3.2.

Keller, G. V. and Frischknecht, F. C., 1966, Electrical methods in geophysical prospecting:Pergamno Press, New York, 517 p.

Keller, G. V., 1987, Rock and mineral properties, in Electromagnetic Methods in AppliedGeophysics - Theory: M. N. Nabighian, Ed., Society of Exploration Geophysicists, Tulsa,Oklahoma, vol. 1, p. 13-51.

Olheoft, G. R., 1980, Electrical properties of rocks, in Physical Properties of Rocks andMinerals: Y. S. Touloukian, W. R. Judd, and R. F. Roy, Eds., McGraw-Hill, New York, 257-330.

Palacky, G. J., 1987, Resistivity characteristics of geologic targets, in Electromagnetic Methodsin Applied Geophysics - Theory: M. N. Nabighian, Ed., Society of Exploration Geophysicists,Tulsa, Oklahoma, vol. 1, 53-129.

Vozoff, Keeva, 1991, The magnetotelluric method; in Electromagnetic methods in appliedgeophysics: Nabighian, M.N., ed., v. 2, Applications, Part B: Tulsa, Society of ExplorationGeophysicist, p. 641-711.

Appendix

AMT data are presented with nine (9) different plots per station. Bostick inversion for station 1 will be Fig. 1 a. The other plots are the Apparent Resistivity, Impedance Phase, Rotation Angle, Impedance Skew, Electrical Multiple Coherency, Tipper Magnitude, Tipper Strike, and Polar Plots proceeding as Figs. Ib, Ic, Id, etc., respectively.

Fig._a. Bostick inversions. Preliminary 1-dimensional inversion models computed using theapparent resistivity and impedance phase.

Fig._b. Apparent resistivity. The relationship of the time-varying magnetic fields and theelectrical fields across frequencies.

Fig._c. Impedance Phase. Represents the ratio of the electric field intensity to magnetic fieldintensity across frequencies.

Fig._d. Rotation angle. Angle between measurement direction and direction of electrical strike,using only the horizontal sensors in the computation.

Fig._e. Impedance Skew. A measurement of the degree of the multi-dimensional resistivitystructure. It should be near 0 for 1-dimensional resistivity structures but larger for 2 or 3-

dimensional structures, and very large for noisy data. Fig._f. E Multiple Coherency. A measure of how well the electrical field correlates with the

magnetic field. High coherency generally means low noise in the data. Fig._g. Tipper Magnitude. A measure of nearby vertical resistivity structure (s). Values close to

0 represents horizontal layering. Fig._h. Tipper Strike, Angle between measurement direction and direction of electrical strike.

Uses both the horizontal sensors and the vertical coil to give a less ambiguous rotation. Fig._i. Polar Plots. Angular variations in impedance. The simpler circular plots often denote 1-

dimensionality; plots that are peanut-shaped denote 2-dimensionality; plots that are four-leafclover shaped denote 3-dimensionality and more complex denote noise at that frequency.

Contour interval 50 meters

0 1 2 3 4 5km l

Figure 1. AMT station locations.

Res

isti

vit

y

(Bos

tick

In

v.)

o

o

en

.1

DE

PTH

(K

m)

Clie

nt:

Rem

ote:

Acq

uire

d:

17:5

Ju

n

08,

1997

S

urve

y C

o:

Rot

atio

n:

Fil

enam

e:

abaO

lcom

b.al

lC

hann

els:

E

xl

Eyl

H

xl

Hyl

H

zl

Ex2

Plo

tted

: 18

57

Jun

08,

1997

< EM

I

Ele

ctro

Mag

neti

c In

stru

men

ts

Fig.

la

APP

AR

EN

T

RE

SIST

IVIT

YN

ort

h

of

Bea

tty

N

V

o

o

o

Cfl

o

fV*

O

x

x

®

9

x

*«

1010

0 10

00

FRE

QU

EN

CY

(H

z)

1000

0

Clie

nt:

Rem

ote:

re

mot

e e

Acq

uire

d:

17:5

Ju

n

08,

1997

Sur

vey

Co:

USG

S

1000

00

Rot

atio

n:

Fil

enam

e:

abaO

lcom

b.al

lC

han

nel

s:

Chl

C

h2

Ch3

C

h4

Ch5

C

h6P

lott

ed:

18:5

7 Ju

n

08,

1997

< EM

I -

Ele

ctro

Mag

neti

c In

stru

men

ts

Fig.

lb

-180DEGREES

135 -90 -45 04502 > JO O* 2 2 ~

2? w*

r»

^

0oa03O

A

wS

1wCDo

:roMagnet

g1

ETwHJ(-

iment

M

.0

Pf

1

*^

Ut

C-H

P

P

O

CD

"0t~« 0< *(T»cc a

?ui vZ

C-H

P

O CD

^COCO*^

Bo ccH{cc

1

op-PppCDsrop-

0

o P1 co

oP1IT-

Op-

og

CD P

^ 10!= oCD g"P S-p SI

MPPoh* Q O

It~*

h* O

h* O

rej O

JO

M^O

o >-^ oB °N

h* OOo o

h*o o oo o

-

: w

H

>--:

-

_

i

-

1 >

;

M

1 1

1 1

X

X

X

#XX

If

1 1

1 1

1 1

1 1

9

I i

I i

161

e

0

«

a

e

' i

i 1

-

-

-«>a e :

e£>

.

9 -

-

e

:

i i

M

za iC/3

O r+cr

o1-h

jn-

RO

TA

TIO

N

AN

GL

EN

ort

h

of

Beatt

y

NV

00

o CM O <o I o a I o (O

I III

1010

0 10

00

FRE

QU

EN

CY

(H

z)

1000

0

Clie

nt:

Rem

ote:

re

mot

e e

1000

00

Rot

atio

n:

Fil

enam

e:

abaO

lcom

b.a

llC

han

nel

s:

Chl

Ch2

C

h3

Chi

Ch5

C

h6A

cquir

ed:

17:5

Ju

n

08,

1997

P

lott

ed:

18:5

7 Ju

n

08,

1997

Sur

vey

Co:

USG

S<

EMI

E

lect

roM

agn

etic

In

stru

men

ts

Fig.

Id

IMPE

DA

NC

E

SKEW

No

rth

of

B

eatt

y

NV

* *

*10

100

1000

FR

EQ

UE

NC

Y

(Hz)

1000

010

0000

Cli

ent:

Rem

ote:

re

mote

e

Rot

atio

n:

Fil

enam

e:

abaO

lcom

b.a

llC

han

nel

s:

Ch

l C

h2

Ch3

C

h4

Ch5

C

h6A

cqui

red:

17

:5

Jun

08,

1997

P

lott

ed:

18:5

7 Ju

n

08,

1997

Sur

vey

Co:

USG

S<

EMI

- E

lect

roM

agne

tic

Inst

rum

ents

Fig.

le

01

COHERENCY.4 .6.8

00 J> p8 Op O Q p

3 p B P<3 R' § rr0 ^ "

Q D 00 H* (5 H;£} *3 O ^^oo m Q

cT QPo5°

5 "^ h-<W CD N- § co ^^% P^

JO

A T3 0 ^ PO M 0 g* ff ^ § Qd CP ^^ *^-*

M ? P P & D2 Q H P £ ^ »- S P- re P O O

£ P D x-s 0, K » R ffi o

S3 fP BT 5*

^ -vZ ^ O

1 s1 i^ 5 g N B H.5 ~ & S W O w OP g pr p o

O i-k OCD P1

j-. CD ^

g 0^ p-

1 " §

1 1 I

.

--

~

-

--~

:-

-

-

:

-

2

_

-1- i i i

i i i

i i i

i i i

i i i

i i i

0

i i i

i i i

_

-

ex :"oc

<x

oc.<s

o I

B

Cxo

X

B -

O

X

or0 -

o x

_

.~

, , , :

W

gaH

n otr

2; on5o*

CdP

£2j^

1 § I

II

.2MAGNITUDE

.4 .6 .8

3op*

1 1w

C/3P

O0aO?.in

A

M

2

1

MCDo

,roMagnet

Q'

P *

1H«

ument

00

!>Q

P

re£

*^2Ui

C-H

P

P

O

CD CD

J2o"

re

CDU1CD

OP

^CDCD

S3reP ore

i^re Pop*re

Q

op- p

2. w*

OP1H*

OP1

op-CO

op*

^

o

op-OS

gre'

P"

hxj W

f|P ?

I?PcrPocT o

| P

o

0 hrj O

S

M

|o

> oa ° N

0 O Oo

o o o o o

o

0o

o o o

OOOOOT OOOOT

i i i

i1-*-1

-x

- X

X

_#"x

SH

-

1 1 1

1 1 1

1 1 1

1 1 11 1 1

1 1 1

1 l 1

-

-

~-

.

-

-

1 1 1

"d "dM

S

Q

Ha

P

Zl

DEGREES

c1 10 100 1000 10000 100000

FREQUENCY (Hz)

Rotation:

Client: . Filename: abaOlcomb.all

Remote: remote e Channels: Chl Ch2 Ch3 Ch4 Ch5 Ch6 Acquired: 17:5 Jun 08, 1997 Plotted: 18:58 Jun 08, 1997 Survey Co:USGS < EMI - ElectroMagnetic Instruments

180 -120 -60 0 60 120i i ~n i

-

-

-

" ' ii '

i i i i i

.,/

1 K

w

vv

1 1 1 1 1

1 1 1 1 1

_ 1

-)H

-*-1

u-*-J

1 1 1 1 1

1 K '

f 1 1 1 l

1 1 1 1 1

,

*

1 1 1 1 l

1 l 1 1 1

-

-

-

-

HHH

w

HH-l

2J

0*-<50

p

POL

AR

PL

OT

SN

ort

h

of

Beatt

y

NV

u>

ET

v

/ \

I \

4.394

Hz

12.2

07 Hz

41.5

04 Hz

79.0

00 Hz

122

Hz

160

Hz

270

Hz

580

Hz

BBS

Hz

2420 Hz

3550 Hz

1159

0 Hz

Rotation:

Cli

ent:

F

ilen

ame:

ab

aOlc

omb.

all

Rem

ote:

re

mote

e

Cha

nnel

s:

Chl

C

h2

Ch3

C

h4

Ch5

C

h6

Ch7

Acq

uir

ed:

17:5

Ju

n

OB

, 19

97 P

lott

ed:

IBS

B

Jun

OB,

19

97S

urve

y C

o:U

SGS

< EM

! -

Ele

ctro

Mag

net

ic

Inst

rum

en

ts

>

Fig.

li

Res

isti

vit

y

(Bo

stic

k

Inv.)

o

oC

fl K

Clie

nt:

Rem

ote:

o o

x X O

a

.1

DE

PTH

(K

m)

Rot

atio

n:

Fil

enam

e:

aba0

2com

.all

Ch

ann

els:

E

xl

Eyl

H

xl

Hyl

H

zl

Ex2

Acq

uire

d:

09:2

Ju

l 11

, 19

97

Plo

tted

: 10

:10

Jul

11,

1997

Sur

vey

Co:

< EM

I -

Ele

ctro

Mag

neti

c In

stru

men

ts

Fig.

2a

APP

AR

EN

T

RE

SIST

IVIT

Yb

eatt

y

nv

o

o

o

W

oK

P

*

*

X

X

a> <&

®

1010

0 10

00

FRE

QU

EN

CY

(H

z)

1000

010

0000

Cli

ent:

Rem

ote:

re

mo

te

e

Rot

atio

n:

Fil

enam

e:

aba0

2co

m.a

llC

han

nel

s:

Chl

Ch2

C

h3

Ch4

C

h5

Ch6

Acq

uir

ed:

09:2

Ju

l 11

, 19

97

Plo

tted

: 10

:10

Jul

11,

1997

Su

rvey

C

o:us

gs<

EMI

Ele

ctro

Mag

net

ic

Inst

rum

ents

Fig.

2b

91

-180-135DEGREES

-90 -45 045C/3 > 70 Oe o CD p; "-J >O p CD< s g pnl"ff

O ^

MOP H» GR5 5O O O

cT

£"

<o o«> M 0*vj ^H

* ^ Q 2 S3 MQ S f? f* ^|

H ? P P ». 3

S - 1 1 8 8 l % ?. S °

CD H* |_ k ps OH* O

» H- n b § P H- P" ^ O CD CJ ^" O

O tQ O 05 P"

§" S

| ^ ®

P S § (* O> Ow

.

I ^

w>

>->

1 " -^

1 1

K

X

X

/«X X

X

1 1

1 1

1 1

1 1

1 1

1 1

i e i

,<*

<

r-e-.

1 1

-

1

>

G

e -e : -6

e e

<j> :

-

a

-

i i

w o

w

cr Q

LI

-180DEGREES

120 -60 0 60120GO > JO OP o co y. -< *Q P CO

III*0^"

0 ^

C B CO O 15 H«>

TO CO O OW M *"*

e_P*

h-> H*

^ H-. - JO 03 ^ *TJ O

w "* »K> W

a "§A T3 O ^ fO M

r- BT SI o y ® » 2 S" o

M ? P P 2. 3» CD a P £ . ^ H^E3 0. Q P o o

, ^iR B § H- ^ _ N hrt ?-> »3 P ^^2 .9 BT cr Q H-> ^. pj0 H-> OET ( ) IO

|s S§§F -MB 5 TO M- O ?D oP H- BT 2. 0CD CO " O

o' co O CO P* <^ "«2 **.

I 0^ p^

5 o 1 CO [J O

& 5 §

1 1 1 1 1

-

-

;~

-

-

-

;

-

-

-

_

-

;

-

-

-

- i i j i i

i i i i i

i t i i i

i i i i i

X

X

1 1 1 1 1

1 1 1 1 1

X

X

X

X

X

X

X

x$x X X

X X

X

X

Xx

1 1 1 1 1

1 1 1 1 1

1 1 1 1 1

1 1 1 1 1

-

:~

--

-:

:

-

-

-

;

-

-

-

1 1 1 1 1 ~

50O

HI-HO

y^*zfw

a*C^ G?r^ ^ 0<3

CO

IMPE

DA

NC

E

SKEW

beatt

y

nv

oo

1010

0 10

00

FRE

QU

EN

CY

(H

z)

1000

010

0000

Clie

nt:

Rem

ote:

re

mot

e e

Acq

uir

ed:

09:2

Ju

l 11

, 19

97S

urv

ey

Co:

usgs

Rot

atio

n:

Fil

enam

e:

abaO

Zco

m.a

llC

han

nel

s:

Chl

Ch2

C

h3

Ch4

C

h5

Ch6

Plo

tted

: 10

:11

Jul

11,

1997

< EM

I -

Ele

ctro

Mag

net

ic

Inst

rum

en

ts

Fig.

2e

61

IS cp*

K>

w > C 5

oB R WOP

(W CD O

n

CO

CD

5

o

M

P ,H- CD

(0M >

O

n01

.2COHERENCY

.4 .6.8

o

100 1000

FREQUENCY (Hz)

C5 C5

o

1 1 1

-

-

;

-

-

;

-

-

;

-ill

I I I

I I I

I I I

I I i

I I i

0 X

I I I

I I I

-

-

« ia .

xo x :

**o X

x xo

X 0x O '.

xo -

x o-X-

0O X

1 1 1

w

dH

notr

cr0>

.2MAGNITUDE

.6.8

w > 73 op-f >0 H o5"<J P § P

o .. o *t

WOP H-. (W CD O O

£ "*

H* |_t ^5j ^^ ^^

Op -sj 2 °

era JQ

pr p* El o *? ° p re <^ s

t?a ? P P 2. 3 2 re p p £ ^ ^5^2.B g _ g i w » R ffl o

M. 0 p ^re" M- h- pOH- 0

^ en ° 0*

? *"" H H P P O

05 H- O m OP r P* 2- o re co "" o

o o o ?o p*

p* "^

g. o

g ^ o

i S § p PJ o t* w o

_

-

: * x *

- -

-je1

: y

*»

"y

- «

[ w

^

- i i i

i i i

i i i

i i i

i i i

i i i

i i i

i i i

i i i

i i i

;

-

-

.

-

:

."

iii-

Hh 1

«

IAGNITUDE

cr

P

II

3cf3*

-180-120DEGREES

-60 0 60120

10 100 1000 10000 100000

FREQUENCY (Hz)

Rotation:

Client: Filename: aba02com.all

Remote: remote e Channels: Chl Ch2 Ch3 Ch4 Ch5 Ch6 Acquired: 09:2 Jul 11, 1997 Plotted: 10:11 Jul 11, 1997 Survey Co:usgs < EMI - ElectroMagnetic Instrument

-

-

-

-

- i i i i i

i i i i i

L

w

1 1 1 1 1

1 1 I 1 1

"-*-

e

V^-1

t i i i i

^

*

L *-

i i i i i

i i i i i

.

*

i

i i i i i

i i i i i

-

-

-

i i i i i

H

Wa

h-H

w

cr CD P

£3

POL

AR

PL

OT

Sb

eatt

y

nv

4.39

4 H

z 12

.207

H

z 41

.504

H

z 79

.000

H

z12

2 H

z 16

0 H

z 27

0 H

z 58

0 H

z88

5 H

z 24

20

Hz

3550

H

z 11

590

Hz

Rot

atio

n:

Clie

nt:

Fil

enam

e:

aba0

2com

.all

Rem

ote:

re

mote

e

Cha

nnel

s:

Chl

Ch2

C

h3

Ch4

C

h5

Ch6

C

h7

Acq

uire

d:

09:2

Ju

l 11

, 19

97

Plo

tted

: 10

:11

Jul

11,

1997

S

urve

y C

o:us

gs

< EM

I -

Ele

ctro

Mag

net

ic

Inst

rum

ents

>

Fig.

2i

Res

isti

vit

y

(Bost

ick

Inv.

)

N)

U)

o

o

o X oX

X

o o

X

x

.1

DE

PTH

(K

m)

Clie

nt:

Rem

ote:

Acq

uir

ed:

13:4

Ju

l 11

, 19

97

Surv

ey

Co:

Rota

tion:

Fil

enam

e:

aba0

3co

m.a

llC

han

nel

s:

Ex

l E

yl

Hx

l H

yl

Hzl

E

x2P

lott

ed:

14:0

1 Ju

l 11

, 19

97<

EMI

- E

lect

roM

agne

tic

Inst

rum

ents

Fig

. 3a

APP

AR

EN

T

RE

SIST

IVIT

YN

ort

h

of

Bea

tty,

Nev

o

o

o

C/J

o05

o

<§ 9

9 i i

i i

10

Nort

h

of

Bea

tty

, N

evC

lien

t:

nR

emot

e:

rem

ote

e

100

1000

FRE

QU

EN

CY

(H

z)

10000

100000

Ro

tati

on

:F

ilen

ame:

ab

aOS

com

.all

Chan

nel

s:

Chl

C

h2

Ch3

C

h4

Ch5

C

h6A

cqui

red:

13

:4

Jul

11,

1997

P

lott

ed:

14:0

1 Ju

l 11

, 19

97S

urve

y C

o:U

SGS

< EM

I -

Ele

ctro

Mag

neti

c In

stru

men

ts

Fig.

3b

IS(TO*

DEGREES

-180 -135 -90 -45 0 45W > JO O 2!P f CP jrt o » < hO B CP *"<« (3 g P £

CP CD "

o £ " P a ° 2S R Eg w ! 3 5oo £ £" £

£? CP

cfi ^"

CD o

^ 3 °

scO

£ A 'fl Q ^d ?B hrt N" rr ' f> t-d ?> P^ N" O *~^x » CD t+ =;

« ? S P 5. 3 s CP p » g: »< i-"ll§ ^ § N H* i \ > . ^

2 fr g & ^

0 t- *"* 0^ ^ ° g 0 ^ P" §S £ N g ^ f» P o2 *-* Q P o P H- P |1 OCP - co " o

C5 CD ^CD P*

51 ^ *" 2 ^ P* P y t± 5 C?

1 '

---

j HH

^-X

«

I M' y - A

u-*___

4tJ

~ i i

1 '

_j

»

M

X

X

*X

X«

J

"-*-

1 1

1 1

1 1

1 '

1 1

1 '

re-

re

6

r-e-.

e

i i

i i

---

i

ae9

o% :

Q

ee

.

a :-i

r«1

I

e

--

__i i

HN S

wS2!n

"d

gw

2! o£5.

o"*5

8?P".

w

2

^

CP Q o& 5 8 w

9Z

DEGREES

isore*

GO >f= 9

o rr o *»CJ pin J- P O co oGO ^ ^

o z;P o Q ^

rr?P 2,

CO Q P

2! CD

CO

W2

I

tJ O ^ JO

5lfSp p ?

JllM

o|9&O H- PH- O

o w6 ^s £58 op

*s

0p* Jl CO -

oP"

op-01

o

-180 -120-6060120

w «o c\ w

sN

0

0 0

0 0 0

0o0 0

o

1 1 1 1 1

---

:

__

-

- i i i i i

X

X

1 1 1 1 11 1 1 1 1

X

X

1 i 1 1 1

X

X

X

X

X

< X

xX

X

XX

X

1 1 1 1 1

1 1 1 1 1

---

;

.

;

-

1 1 1 1 1 -

s

Q t-1

o o

IMPE

DA

NC

E

SKEW

Nor

th

of

Bea

tty,

Nev

1010

0 10

00

FRE

QU

EN

CY

(H

z)

Nort

h

of

Bea

tty

, N

evC

lien

t:

nR

emo

te:

rem

ote

e

Acq

uir

ed:

13:4

Ju

l 11

, 19

97S

urv

ey

Co:

USG

S

Fig.

3e

1000

010

0000

Rota

tion:

Fil

enam

e:

aba0

3com

.all

Cha

nnel

s:

Chl

C

h2

Ch3

C

h4

Ch5

C

h6P

lott

ed:

14:0

1 Ju

l 11

, 19

97<

EMI

- E

lect

roM

agne

tic

Inst

rum

ents

.2

COHERENCY .4 .6

W > 70 0 2Jp O CD M. O "< ^ p CD *t<j p P p ?+

<3 51 § rr ^0 2- p 2,o " ^G a CDCO H* P CD h-Q CO 0 P 0

e * £ 2!

C '

i ^sMJO

A "0 O * *! ?0 H

. __ . ^^ M M Qd CjFy ^^ P ^ >! jj

2* b H- p OH* o JT r^ CO ~ _ v * 3^

!« S| P "" P oW H- ^ p OP h- P" > O CD - W " O

o" o o c P"

Po "-< P" P en g

§9 §5? 8 w

1 1 1

--

;

.

^

;

-

_

-

i i i

i i i

i i ii i i

>

O

i i i

i i i

.

--

x o :

x oX 0.

xo.

xa

9fo:xo

X 0 °

O XX "

O x I X

~-

o< x o

x o"

_

1 1 1

W

aH

nO

2

g.o

s?p

<

.2MAGNITUDE

.4 .6 .8CXJ > JO O 25C O CD P O^ ^ D CD *< <5 fl P B < *CD E. o Ji er *< T « * rro^"P&0 2G g OJ r/2 »- P CD »- Q CO 0 P 0w £ J" £

fl m "£ 2!

h- ^ ^-*

^ eo O

*" " 1 ° u> Hera ^o

A fl 0 ^ JO M

nllll | g CD H P ? *^ "* 3 O- CD B O O

j±. P n _. OI M S R ffl o

^ 0 5» xSjr fr P* ^CD O H* B>2> ^ o

s £ N g !» P o

CD "^ CJ *" O

O to OCD P*

ET "^ ^

1 n2 P* P m g

§ g S1 s §

1 1 1

-

--

: ' *~

-K-J

SH

4^

" Sf

se: * "*

X X1

Sf

] w1^«J

_

-

->-

' X '

"-X-1-

-I*-

~ ' ' a^^^^^^

1 1 1

_J

1 1 1

1 1 1

1 1 1

1 1 1

1 1 1

1 1 1

1 1 1

1 1 1

-

.-

;

-

-;

-

_

-

--

-

-_-

1 1 1 ~

HHH

wa^^

>

NH

HSM

^0

soba*b 1 T^

8?P r+«?«

2!(D^

CO

0£

-180-120DEGREES

-60 0 60120W > 70 0 2!P O Q ^. O

^ j| o g. 5CD CD "

o e- " P a 0 3a § CD 00 H- P » »-

Ow o P* o ( » (**

£Q 2!Q

H* ^^*

^ H* ^.

S § 3 §

Ǥ

A SgSg5 w.MM p9 cy * ~~r~ ^*~

M ? P P J». H^ ^*^* ^- A W l*> ^^

- 2. 5 g ^§ w Q r. '^ o

2? ?& ^ Q O H» P§" ^ o 8s £. 5 2P P o

*« ^ S p S P H* P^ = O Q - CO ^- O

o* S o o P*ff ^ ^ 1 o^ P"0 & g

is §

1 1 1 1 1

--

;-

-

-

-

-

:

---~-<

_

.I- i i i i i

i i i i i

'-H-1

L

l l i i i

i i i i i

*H**

-* '

. x .1 y i

i X '

1 K-

1 1 1 1 1

1 X

L

4f

-*-

He-

, _ i

1 1 1 1 1 1 1 1 1 1 1

i i i i i

^

i

*-

i i i i i

i i i i i

-

-

--

--

.-

~

i i i i i ~

HI-H

M50

LTlHI-H

M

O

?

O

s*

P rf

$*2^

M ~ O?» o> o

POL

AR

PL

OT

SN

ort

h

of

Beatt

y,

Nev

> /

¥,,

4.39

4 H

z 12

.207

H

z 41

.504

H

z 79

.000

H

z12

2 H

z 16

0 H

z 27

0 H

z 58

0 H

z88

5 H

z 24

20

Hz

3550

H

z 11

590

Hz

Nort

h

of

Bea

tty

, N

ev

Ro

tati

on

:C

lien

t:

n

Fil

enam

e:

aba0

3co

m.a

llR

emot

e:

rem

ote

e

Cha

nnel

s:

Chl

C

h2

Ch3

C

h4

Ch5

C

h6

Ch7

Acq

uire

d:

13:4

Ju

l 11

, 19

97

Plo

tted

: 14

:01

Jul

11,

1997

Sur

vey

Co:

USG

S <

EMl

- E

lect

roM

agnet

ic

Inst

rum

ents

>

Fig.

3i

Res

isti

vit

y

(Bo

stic

k

Inv

.)

U)

to

&

&

K £ Wo

o

oo

XQ

O

x

O

o

0 9>

o

o o

x

x

O

.1D

EPT

H

(Km

)

Clie

nt:

Rem

ote:

Acq

uire

d:

14:2

Ju

l 11

, 19

97S

urve

y Co

:

Rot

atio

n:F

ilen

ame:

ab

a04c

om.a

llC

hann

els:

E

xl

Eyl

H

xl

Hyl

H

zl

Ex2

E

y2P

lott

ed:

14:4

0 Ju

l 11

, 19

97<

ENfl

- E

lect

roM

agne

tic

Inst

rum

ents

>

Fig.

4a

APP

AR

EN

T

RE

SIST

IVIT

YN

ort

h

of

Bea

tty.N

V

o o o T-t

OT

_

«

§

H § o

2

:. i

i i

i i

i i

i

- - - - -

* $

- -

i i

i i

i i

i i

*

3C

*

X

^

(

(^

®

®

©

©

I I

1 1

1 1

I 1

@ (C

X

®

,x

x©

K 0

x

1 1

1 1

1 1

1 1

**

(D $

(fQ

i i

i i

? i

r j_ - - ~

3^

- -

10

Cli

ent:

Rem

ote:

re

mot

e e

Acq

uire

d:

14:2

Ju

l 11

, 19

97S

urve

y C

o:U

SGS

100

1000

FRE

QU

EN

CY

(H

z)

1000

010

0000

Rot

atio

n:F

ilen

ame:

ab

a04c

om.a

llC

hann

els:

C

hl

Ch2

C

h3

Ch4

C

h5

Ch6

C

h7P

lott

ed:

14:4

0 Ju

l 11

, 19

97<

EMI

- E

lect

roM

agne

tic

Inst

rum

ents

>

Fig.

4b

» Q (ft ^*

3 M

0 - 2. w w <T

OD

(JO

O

w§

1w

I3o

Plotted

"

>-*

oi*

Channe

t 1cc

9j&*

3I "s<1> ""

o1P>

5^/*«!

Rotatio

P

M ^>

M2!

'ffl

N

S £ »

9O)

~ so V

9o>

DEGREES

-180 -135 -90 -45 045

O

O O

> kOo o

o

o

100000

i i

-

se

N

-

-

-

I

X

X

.--

.-

_

ne

*

-

i i

i

(

X

-H X

X

X

XM

M

W

*

1 I

i i

1 1

i i

1 I

i i

r-e-i

r<

t

0

rO!

t

i (

r

!<

I |

1 1

-

*

B

0

Q

©

> :

0a

Q ^_--

0

©

? in

3t

1 1

^

w

2: or* P-

O

TO

-180 -120

DEGREES

-60 0120M > 50 Q^ >O 3 Jtt' < d 8

<2 S' & *"*"<3 <1> ""

o ft- "0 "1

w »- io f . ...

1"E

CDCD

O

a«odM

A ^rt ^j ^-j Jrri *T^

O m S\ ^4* v2

S S. § 8 o' x~, K* * ' S H ti? (3 OB <* P cn x I if .. Jt* O 1 N o

* i 7r f5* o*<% 4^ h^ P>

I& io

s H « I! <tt CO ^""*£ o O f /S VJ ^^

sD h.d ^*CD 5Jf o

g* ^2 ^ O

v <Z °OOoo

1 1 1 1 1

-

-

\

.

-

--

_

_

-

- 1 1 1 1 1

1 1 1 1 1

X

X

X

*x

X

yAX

X

X

1 1 1 1 1

1 1 1 1 1

X

X

1 1 1 1 1

1 1 1 1 1

X

1 1 1 1 1

I 1 1 1 1

X

X

X

X

1 1 1 1 1

1 1 1 1 1

-

--

_

-

-

-

-

-_

I

-

1 1 I 1 1

a0HfeHi i O2J

2J

tr1 W

2!o*irfsr

0

SPp?^

IMPE

DA

NC

E

SKEW

Nort

h

of

Bea

tty,N

V

u>

<o CD C\I

1 1

1

1 1

1\

r i

i r"

i n

10

Cli

ent:

Rem

ote:

re

mot

e e

Acq

uire

d:

14:2

Ju

l 11

, 19

97S

urve

y C

o:U

SGS

100

1000

FRE

QU

EN

CY

(H

z)

1000

010

0000

Rot

atio

n:F

ilen

ame:

ab

a04c

om.a

llC

hann

els:

C

hl

Ch2

C

h3

Ch4

C

h5

Ch6

C

h7P

lott

ed:

14:4

1 Ju

l 11

, 19

97<

EMI

- E

lect

roM

agne

tic

Inst

rum

ents

>

Fig.

4e

COHERENCY

.2.4.6.8

e o <t3 "8 13 J 1 rt fi- " o i

CO >r*0 £co M

"

CD CD

sTO*

f , 'r* f5 OB|2 g g g-

& ^ T I

CD

wM JO

3» 2! I i O f~\<tt <* 7J3 £0 1^

oO O

oo o o

o o o o o

1 1 1

-

.

-

-

-

- 1 1 1

1 1 1

1 1 1

1 1 1

1 1 1

1 1 1

o

1 1 1

1 1 1

<3

OX .

O< -

OX-

ox

Xa -

X O

xo!X -

e X-

o<

-

oxs

0

o

1 1 1

dtr1 HO otr

O

5O

s?

O CJ

ro %

TO «©

f -

K £ «* §p 9

.2

MAGNITUDE

.4 .6 .8

h->

so

>->

so

t-»ooooo

1 1 1

-

-

: x

u-*-1

- ^

X " X

X X

H *_ w

: xX

-

t V--.--1

i y i

-iii

i i i

i i i

i i i

i i i

i i i

i i i

i i i

i i i

i i i

-

-

.

;

-

-

1 1 1 ~

HHH

13M

O2HH

HaoM

2 O (-> CT

0

s?p<r*

<T

;> o

o n

O)

o

d

9

DEGREES

-180 -120 -60 0 60 120

d w25

cT <i> ?? S§ No

HHH"0

MS3

W

North

I?PBe*

o o

POL

AR

P

LO

TS

Nort

h

of

Bea

tty

.NV

"~~

~~

-^

a\

^^

i ^

/ ~-

-x1

^x

.

V, 8

'\V

\

"".^

/

*-

/

/'

/

\

'

\

1

*

\ \

xV

*

s

* *

«.

s

* >.

/

" x

( -

XN\ \

/

xs

/ ^

v s

-x

x

'

4.39

4 H

z 12

2 H

z 88

5 H

z

^ *

x

,''

v\/

('

?

x /

\ ^

s ,,

/

~* s

/

V

/ / ,

1 ,

1 ,

/ ;

c/

^ /

i ;

/

\ /

\ /

\ /

^ ,,

y"

"*<»

<i

i V

....

V_

% ";:

xv^

12.2

07

Hz

160

Hz

2420

H

z

/

*" v

/ xx

\ \

; \

\ \

/X

/

'-'~~

~--*

.

i ^-v

a

\ *

]\x

/ vx

/

""--,,'"

'

/- - ''"

^>

i /

\ /

\ f'

"*"*

~^.f'

41.5

04

Hz

270

Hz

3550

H

z

/ \

/ \

/ \

i \

\ i

\ i

%'M

'/

\ i

i\

i \

/ \

//

" »,. ^ i v

' \

* 1

xx

/ \

/v

v

/

"^

/

K^

x

S

">"^*

^

*-'

^_

"

/''

")

,-'-

'&?

---'

1

1

; /

\_s

79.0

00

Hz

580

Hz

1159

0 H

z

Cli

ent:

Rem

ote:

re

mot

e e

Acq

uire

d:

14:2

Ju

l 11

, 19

97S

urve

y C

o:U

SGS

Rot

atio

n:F

ilen

ame:

ab

a04c

om.a

llC

hann

els:

C

hl

Ch2

C

h3

Ch4

C

h5

Ch6

C

h7P

lott

ed:

14:4

1 Ju

l 11

, 19

97<

EMI

- E

lect

roM

agne

tic

Inst

rum

ents

>

Fig.

4i

JT w 3 <?^

a »

i?a^a

OHM METERS

10 1001 1 1 1 1 1 1 1

o

-

}

.

-

1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1

X

0

X

o

X

xo x x

o ®X

dPX

ox

0

X

0

0

1 1 1 1 1 1 1 1

1 I 1 1 1 1 1 1

o

-

-

_

-

1 1 1 1 1 1 ! 1

Resistivity

oCQM*

O

1

APP

AR

EN

T

RE

SIST

IVIT

Yn

ort

h

of

Bea

tty

to

o

o

o

Cfl

_«

§

o

2

10

Cli

ent:

Rem

ote:

re

mot

e e

Acq

uire

d:

15:1

Ju

l 11

, 19

97S

urve

y C

o:U

SGS

100

1000

FRE

QU

EN

CY

(H

z)

i i

i i

i i

1000

010

0000

Rot

atio

n:F

ilen

ame:

ab

a05c

om.a

llC

hann

els:

C

hl

Ch2

C

h3

Ch4

C

h5

Ch6

C

h7P

lott

ed:

15:3

2 Ju

l 11

, 19

97<

EMI

- E

lect

roM

agne

tic

Inst

rum

ents

>

Fig.

5b

Efr

3w*

DEGREES

-180 -135 -90 -45 0 45cfl > 50 Q ' ' ' ' ' ' ' ' c <5 2 CT

l!|l (D <D« fi" "9 2s 9 c/2 >t 63O C* O

w ~ £" »-s-- k "

>-*>-*

>-*

CDCD >2

K- k

O*1 0t?d

JOS

A "0 Q S1 » Z

«IPI 3s£l|? _ ^ sr 8 P s s I S S g* §

s« 9& ^<? ro ^ p3^9? * c M 0 S & M B P 3

? c 9'z S. " 0 ^ »- ^^ F"^

S' *- ^ ° ° «o Q o«O tf O

^* -J * 0CQ >*n

^T &* C w

s i ff *9 v ^a o

1 1

.

,

-

: w -X

X

H

X

-

"

4(-

se

i i

i i

X

w^ '

*

i i

i i

i

-x , (.

\ i

i i

x

) i

i i

i i

ei

a

0

©£

r-e-i

r-e

Q

r-e-.

i i

i i

©© :

&©e

ii

_---i

-

.-:

i i

HH

g"dMk^^P> ZS^d

£ww

3o*-<rt-troM»

CTJ P rf ?

v ^ o ' - oo o

DEGREES

05 > » Q

pd

O " "^

^1

JO

O- S b o t i 3 Mco <s R

« CO O M ^^

?PSN

pI

-180 -120 -60 0 60 120

K-o

> oo

^oo o

^-k

o0

^*

1 1 1 1 1

-

--

-

- 1 1 1 1 1

1 1 1 1 1

1 1 1 1 1

1 1 1 1 1

>

X

X

X

X

X

1 1 1 1 1

1 1 1 1 1

X

X

X

X

X

1 1 1 1 1

1 1 1 1 1

1 1 1 1 1

1 1 I 1 1

-

-

-

----

_

-

1 1 1 1 1

»0H>Ho

>otr1M

3O ^r^tro

COp

o ooo

IMPE

DA

NC

E SK

EWn

ort

h

of

Bea

tty

10

Cli

ent:

Rem

ote:

re

mote

e

Acq

uire

d:

15:1

Ju

l 11

, 19

97Su

rvey

C

o:U

SGS

100

1000

FR

EQ

UE

NC

Y

(Hz)

1000

010

0000

Rot

atio

n:F

ilen

ame:

ab

aOS

com

.all

Cha

nnel

s:

Chl

C

h2

Ch3

C

h4

Ch5

C

h6

Ch7

Plo

tted

: 15

:32

Jul

11,

1997

< EM

I -

Ele

ctro

Mag

neti

c In

stru

men

ts

>

Fig.

5e

.2

COHERENCY

.4 .6.8

rQ

§$ n' 8- rr

$ o " 2r* 3 ^^ H

C^ ^^ OM ^ £" i-* ^ 0

1 I

?t k<0

t ko

irq °77tflJOG

« ^ Wo' g* J' ^. n

S (^ ^ § O ^ s K-.

So' S ^ S °1 " " ^ °? § E fl^gf

*3 t-* Q CD 53 ^ * E7 P"*

rt «o £5 o«D M O

g- -i * o

| 9 tf 01

§ 9sr *

9 s

1 1 1

-.--

-

.

I

- 1 1 1

1 1 1

X

1 1 1

1 1 1

x o

i i i

i i i

c

o

1 ! 1

1 1 1

ex :

ex

OL

&'2>

£

P :XO

x co

yA

O X

--

-

-

ox

x o"

--

-III-

M

gGr1H

n0t^

gsf*tro

03

1^

o o

MAGNITUDE

TO"

O £ '"

o n

to *+ 3JTJ W o

«-(£

<t o

?§££ 2 CO ^ m« ro £>

£

S' ^ o ^- 3 p ^

cW

0

(-*o

80

l-k 0

§

l-koo§

s(^«>

.2i i i

: <-*- '

He

. "-XJ

. 4f

^ #

: w«w

SH

-*-1

-III

.4i i i

1 x

i i i

.6i i i

i i i

.8i i i

-x

i i i

1i i i

i i i

i i i

-

-

i

-

i i i -

HH-iTJ tJ W

O

dM

north

03 rt P

-180-120DEGREES

-60 0 60120W > 70 0p o CD pr2 ^. I s

CD roO .7 0 ^G g 00 H* P £Q y o o w M- £"

£*

H*£ *

^ S ,-

V S *l 8

53T" M JO

? 5 S o5 S 2. » co <* s

M ? P P g. 3 2 CD a p» S- ^ *-* * P- g g 5 o , " 5f I p- ^o

1- 0 M N?^^& Cw Uv ^^ tt ON o

o e~> p" 2 SC TO 2 & B K P* P O

<B i- Q c» og * 5 & S

~le1 i p c'§3 § p s ° w

1 1 1 1 1

-

-

I

-

j

-

-

-

I

-

- 1 1 1 1 1

1 1 1 1 1

,

i 1 1 1 1

1 1 1 1 1

*

^

4

.

i «

*

i

1 >f

1 l 1 l 1

1 1 1 1 1

i

^

- _ i

l 1 i i l

-

-

;

-

-

-

:

-

\

'

1 l i l i "

H

S3

W

H-l

W

S3

8r*-

0

cd0?

ff

POL

AR

PL

OT

Snort

h

of

Beatt

y

4.39

4 H

z 12

2 H

z 88

5 H

z

12.2

07

Hz

160

Hz

2420

H

z

41.5

04

Hz

270

Hz

3550

H

z

79.0

00

Hz

580

Hz

1159

0 H

z

Rota

tion:

Cli

ent:

F

ilen

ame:

ab

aOS

com

.all

Rem

ote:

re

mote

e

Cha

nnel

s:

Chl

C

h2

Ch3

C

h4

Ch5

C

h6

Ch7

A

cqui

red:

15

:1

Jul

11,

1997

P

lott

ed:

15:3

2 Ju

l 11

, 19

97

Sur

vey

Co:

USG

S <

EMl

- E

lect

roM

agne

tic

Inst

rum

ents

>

Fig.

5i

Res

isti

vit

y

(Bo

stic

k

Inv

.)

o

o

IS

Cli

ent:

R

emot

e:

*

x

.1

DE

PTH

(K

m)

Rot

atio

n:

Fil

enam

e:

aba0

6com

.all

Cha

nnel

s:

Exl

E

yi

Hxi

H

yl

Hzl

E

x2A

cqui

red:

21

:3

Jun

10

, 19

97

Plo

tted

: 14

:11

Jul

10,

1997

Sur

vey

Co:

< EM

I -

Ele

ctro

Mag

neti

c In

stru

men

ts

Fig.

6a

APP

AR

EN

T

RE

SIST

IVIT

Yn

ort

h

of

Bea

tty

o

o

o §

o

s

<$>0

©03

o

10

Cli

ent:

Rem

ote:

re

mot

e e

Acq

uire

d:

21:3

Ju

n

10,

1997

Sur

vey

Co:

USG

S

100

1000

FRE

QU

EN

CY

(H

z)

1000

010

0000

Rot

atio

n:F

ilen

ame:

ab

aOG

com

.all

Cha

nnel

s:

Chl

C

h2

Ch3

C

h4

Ch5

C

h6

Ch7

Plo

tted

: 14

:11

Jul

10,

1997

< EM

I -

Ele

ctro

Mag

neti

c In

stru

men

ts

>

Fig.

6b

eraON

3 §IIw wo ^ 00 G5

If-180-135-90

DEGREES-4545

M JO G M

N

K- '

O

o o

o

o§o

( Io«

I 1

: se

46-

*

j

-

X

-

, ^

X

1 1

i i

<

4

N

w

1 1

i i

I I

i i

e-

i i

i i

e

©

©©oQcj

Q

©

Q

e ie

a

r-

1 1

1 1

-

-

-

--

§D

-

1

e L

a

I

i

i i

M

1

C/3M

Cd CD

O O

-180-120

DEGREES

-60 0 60120

0c: CO 0 CO

2? cp"

ONa

A

ws

1w X"I3 &f»

<fe3£fTX> 1pr*^£

§r+GO

V

>-^ OJ

«_

t k O

l-k SO SO

Plotted

l-krf^h^to

&1 -

l-kpl-kso so-s3

remote e

Channe

i - 00

91-^

O&* ro

9CO< }

!fr>trCJl

eO)

9-s3

Rotatio Filenan

S R

P0"

a06com

ELi-^

*J

JO

tfl

1H N"-^^

O

0 0

1 > 0o0

1 ko o0 0

l-too000

1 1 1 1 1

-

-

-

-

I

-

-

-

-

- 1 1 1 1 1

1 1 1 1 1

X

X

1 1 I 1 1

1 1 1 1 1

X

X

X

X

X

X

X

X

X

X

X

X

1 1 1 1 1

I 1 1 1 1

X

X

1 1 1 1 1

1 1 1 1 1

1 1 1 1 1

1 1 1 1 1

-

-

-

-

-

_

-

:

-

1 1 1 1 1 ~

oH > HHH

O

2! Qr1 M

IMPE

DA

NC

E

SKEW

no

rth

of

B

eatt

y

oo CM

1 1

1 1

1 1

1 1

: - - - . .

...l.

11

*_

i T-

r

i i ti

r

*

i i

r"

i i

i i

r

1

}

1 1

1 1

1 1

1 1 _ -

1 1

1 1

1 1

1 1

10

100

1000

10

000

1000

00

FRE

QU

EN

CY

(H

z)

Cli

ent:

Rem

ote:

re

mot

e e

Acq

uire

d:

21:3

Ju

n

10,

1997

Sur

vey

Co:

USG

S

Rot

atio

n:F

ilen

ame:

ab

aOG

com

.all

Cha

nnel

s:

Chl

C

h2

Ch3

C

h4

Ch5

C

h6

Ch7

Plo

tted

: 14

:12

Jul

10,

1997

< EM

I -

Ele

ctro

Mag

neti

c In

stru

men

ts

>

Fig.

6e

COHERENCY

.2.6.8

o n

S M 3

3era*

£53

O 05 OO5. M I-H r? iu

Oi

I 9 s

t 'o

l-k 0

WJO

w3N

^ 55 o^ §

i->.o o o

>-* <*5>

1 1 1

-

.--

-

-

, , ,1 ! 1

X

1 1 1

1 1 1

o

oo

«

1 1 1

1 1 1

-o x :-

ox

Qt-

CK.

0 05

°<9*-

O X

o x I_--

_

0

o x -

o o "

III"

sH

no&

J30"-Jr^tr0

COp^

.2

MAGNITUDE

4 .6 .8

era

cp > » Q £ a

sfl* ct fl>/-> O* " o rrq "*

O2 K> 3

o^£w " % ,-

&< &> k o> kCO CO ^2

t ko

*J ° 3ra JO CJM

A 13 O 3 W 2

«Sfr| 3 Sc» B g f± P- (6 § 0 , s ^" S" 5 3 T« ^ oj <t r: lit ^-u

1 " " No ._, ^ o a v"""' s *- 9 § o ^^^

iggf P 9

3 s9£ » ° s* ^* /-> °§i § ^ ^ * o

rl ^ ? Pf g 01

§ 9 8- & CO

P s v -J g

o0o

1 1 1

-

-'.

"-*-1

. 4P

w- V

- w7A

: w w

$X

X

^e

i x

i \f -i "n ~

4H

' *-*-

- J J _ i

i i i

1 1 1

I i i

1 1 1

i i i

1 1 1

i i i

1 1 1

I i I

-

_

-

*

-

-

III-

Ht i"d "d 3S3

sh-^

^GNITUI

s^M

V o(T*cr

oH<i

tdCT> P e*

4

TIP

PE

R

STR

IKE

no

rth

of

Beatt

y

DEGREES

0

60

120 0 I o CVI

»-t 1 o 03 »-t

-- "

T "'

r riii

r-

r i

- - - -

i1

'"1 "T

1i

i i

-t1 > .

-i

5

' 1 T

J' i~

i i

i i

i i

t i

i i

i i

i i

i i

'M }

i iii ;

-

i i

i r

-

i

-T ~[

i

n i

r- - -

* : - - - -

10

Cli

ent:

Rem

ote:

re

mo

te

eA

cqui

red:

21

:3

Jun

10,

1997

Sur

vey

Co:

USG

S

100

1000

FRE

QU

EN

CY

(H

z)

1000

010

0000

Rot

atio

n:F

ilen

ame:

ab

a06c

om.a

llC

hann

els:

C

hl

Ch2

C

h3

Ch4

C

h5

Ch6

C

h7P

lott

ed:

14:1

2 Ju

l 10

, 19

97<

EMI

- E

lect

roM

agne

tic

Inst

rum

ents

>

Fig

. 6h

POL

AR

PL

OT

Sn

ort

h

of

Beatt

y

oo

4.39

4 H

z12

2 H

z 11

70

Hz

12.2

07

Hz

160

Hz

2420

H

z

41.5

04

Hz

270

Hz

5210

H

z

<=*»

79.0

00

Hz

460

Hz

1159

0 H

z

Cli

ent:

Rem

ote:

re

mote

e

Acq

uire

d:

21:3

Ju

n

10,

1997

Sur

vey

Co:

USG

S

Ro

tati

on

:F

ilen

ame:

ab

a06

com

.all

Chan

nel

s:

Chl

C

h2

Ch3

C

h4

Ch5

C

h6

Ch7

Plo

tted

: 14

:12

Jul

10,

1997

< EM

I -

Ele

ctro

Mag

neti

c In

stru

men

ts

>

Fig.

6i

Res

isti

vit

y

(Bo

stic

k

Inv.

)

o

oC

fl

Cli

ent:

R

emot

e:

X

XX

.1

DE

PTH

(K

m)

Rot

atio

n:

Fil

enam

e:

aba0

7co

mb.a

llC

hann

els:

E

xl

Eyl

H

xl

Hyl

H

zl

Ex2

Acq

uire

d:

21:2

Ju

n

09,

1997

P

lott

ed:

20:0

2 Ju

n

10,

1997

S

urve

y C

o:

< EM

I

Ele

ctro

Mag

neti

c In

stru

men

tsFi

g. 7

a

09

OHM METERS

*J

QTQ-JO1

?r£9 q rv

ote: remote uired: 21:2 ey Co:USGS

lien em

Jun 09

997

e

M £ 3 3 £

t " «5 H<ca rt R

<tJ ^> K^ CD

o ^

101001000

g

ffl

o

1 ko

1 o o0

o o o o

100000

i i i 1 1 1 1 1

-

-

1 1 J 1 Mil

I 1 1 1 II 1 1

1 1 1 1 1 III

W

H (

X <a

x d

© «

©

©

><

H<T

r<

1 1 1 1 1 III

1 1 1 1 1 1 1 1

a

e

>

B 6>

*

e*

©

KGei

^TI

1 i M 1 1 II

1 1 1 1 1 1 1 1

-

-

-

-

-

-

-

_

-

i i i i 1 1 ir

1313

W2

ooi i <! I-H

3

tr o

CO n>

19

DEGREES

-180 -135 -90 -45 045

TO

o? > » Q£ O <5 »_> 1 »o g <p

If |* p.

0 " 2C3 803 10 3O >- o03 ft £ ^

OfT *£

oCO

t k COCO

1 kof**l

wJD

W A ^Tj £^ ^^ 5CJ *"!3'

^ g- g: o ^E^J <"^ M ^ JlL

§ 2- « § o' ^^. M. jr g a "^ o cc « r: I-IH o

M ^ °

I ft 1§ o S EL ^^ " h^ K^

"59 1 ^ H (O tf*V f^5 "^N S3*d en

fi 9 § v ^i 2

1 1

-

.-- ^-

w

«

1

!

-

I

-

" X--

.

Xne

ne

i i

i i

<

X

X

X

X

ne

X

1 1

1 1

1 *

1 1

i 1

,

1 1

1 1

rO-i

e

@

©©

©

cc<

©

i

Gr-e-.

re,

1 1

1 1

-

-

-

)©t>

_

Je -

a-

& -~

"

-

i i

HH

^^^^

Z=

^d

!>MM

O "Se*tr

o

»e*

3

0oo

Z9

-180 -120

DEGREES

-60 0 60 120

ISTO*

w > » O P 5 fi M-

3t|ft ^ 2 £-o fr "P 2 £ 3 03 10 S0^2. 03 tO £ ^

O t- ...

? *30so

1 k

1 k

O>TJ °

jjnMJOC

ft ^ M

^ of S' ^ ^M £ g 3 ^ ^

H f^ <^ § o' ,~^ t

IO ^-> « x"-'/ M o LJ l_i ^ ^ -T ^r CT^ <^ t**^ ^^ JP 2. en o

l&g?p 3 S

1 o i | t-1- <g» rt t i O ^

so ST off «5 4^ 0 3 ^2Oj ^

J g

S 9 r+ ®

9 s v ^I Oo0o

1 1 1 1 1

-

:

--

-

I

-

_

-~

--

-

1 1 1 1 1

X

1 1 1 i 1

1 1 1 1 1

X

yA

X

X

X

X

XX

X

X

X

*

X

1 1 1 1 1

1 1 1 1 1

X

X

1 1 1 1 1

1 1 1 1 1

1 1 1 1 1

1 1 1 1 1

--

-

I

-

-

-~

--

-

--

-

I

-

1 1 1 1 1 ~

ROTAT

O2!

2! 0

M

2! O"I

so""*

taPB

^"

IMPE

DA

NC

E

SKEW

Nort

h

of

Beatt

y

U)

*,*

,,,

J10

Cli

ent:

Rem

ote:

re

mote

e

Acq

uire

d:

21:2

Ju

n

09,

1997

Sur

vey

Co:

USG

S

100

1000

FRE

QU

EN

CY

(H

z)

1000

010

0000

Ro

tati

on

:F

ilen

ame:

ab

a07

com

b.a

llC

hann

els:

C

hl

Ch2

C

h3

Ch4

C

h5

Ch6

C

h7P

lott

ed:

20:0

5 Ju

n

10,

1997

< EM

I -

Ele

ctro

Mag

neti

c In

stru

men

ts

>

Fig.

7e

S: o

e-a§Cfi ft

o01

H sSg, h^> O )_* O

os

COHERENCY

A .6.8

w*-4Mh ^*9

o? > » Q ff o « jn

llal ft <B

« fr "o nC3 3w 10 »0^2. w 10 g-

cT A

o5°» k «2«2-v2

» »0

t ' 0o

s«oaw

o o o

o o o o

o o

1 1 1

-

.

-

-

-

.

- 1 1 1

1 1 1

1 1 1

1 1 1

1 1 1

1 1 1

1 1 1

1 1 1

XO

XQ

JO

C

X3

O

>O O

o IX

X Oo =

X

xo ~

x -

8

O X

X O

III"

w

O Otr

O

£r o

MAGNITUDE

.2.4.6.8

2 era*

era

flf 13 1 1 *o ^c: a w ro 3 w ro ST

o

3

o

»-*?o^3

t-^o

| . o

M

CJ M <*> "d £ 5 W Z

g- er £ o ft*|§8g 3 P fi- <t g o' ,^-s ^

! H ^ " jj §ro /~\ « ^^^ M f~> La >~.

<t o i t p O. O« o *t ^ 2?o ^4 er § K g w |

^s9^ <B O cj C-ff O0 ^ 0 O «3 tr o 5* S ^ °

i ^1 »

tf ^^ v -<2 0O O O O

1 I I

-

-

-

1 x-

1 \/J

t yi

; ^

w

, x .

x

-

-Ill

1 1 1

x

_J

1

X '

X

1 1 1

1 1 1

,

1 1 1

1 1 1

1 1 1

1 1 1

1 1 1

1 1 1

:

-

-

I

-

~

1 1 1 -

HI-H

w

1I-HH C|

M

North

o

j

TIP

PE

R

STR

IKE

Nort

h

of

Beatt

y

o

W

W

Q

o I o

W o CD

10

Clie

nt:

Rem

ote:

re

mot

e e

Acq

uire

d:

21:2

Ju

n

09,

1997

Surv

ey

Co:U

SGS

100

1000

FRE

QU

EN

CY

(H

z)

1000

010

0000

Rota

tion:

Fil

enam

e:

aba0

7com

b.al

lC

han

nel

s:

Chl

C

h2

Ch3

C

h4

Ch5

C

h6

Ch7

Plo

tted

: 20

:05

Jun

10,

1997

< EM

I -

Ele

ctro

Mag

neti

c In

stru

men

ts

>

Fig.

7h

POL

AR

PL

OT

SN

ort

h

of

Beatt

y

ON

,*"'''

XN>

( 0

)\

f'f

\ .'-

'

/

VS

\f

\1

\ 1 \

/ >

/ \

/

^

^s

f

"" ^

/ 1 V

V /

* /

"V

4394

Hz

122

Hz

885

Hz

,,-'

~-

»v

/ '

\ / '

»/

° /°°/

1 I

1 /

\s

^/

V 1 x,

i X

. 1

^-

x v

^%v

Xs\

1 1 x^

/

s

12.2

07

Hz

160

Hz

2420

H

z

""

VN/

\»

\ /

/'

""v

/ ^

/ v

/

N

I X

x

[ s

\ /

\ /

** ^

s

N -^

^ /

0 / \

1 \ \

\ "»

\ Nx

NN

*

\

s\

X \

Xx

1\

/

41.5

04

Hz

270

Hz

3550

H

z

P"'

~^N

/

X

1 >,

1 1 xv

8\

X

i \

i xx

/">

/ ^ x

/

/'

f \

/ \

a

/

\

*

\ i

v ,

^

f

a

s

~* ^

^

/,

\\

1 \

/NN

/

X /

x s

. s

*- ^

f

79.0

00

Hz

580

Hz

1159

0 H

z

Cli

ent:

Rem

ote:

re

mo

te

eA

cqui

red:

21

:2

Jun

09,

1997

Sur

vey

Co:

USG

S

Ro

tati

on

:F

ilen

ame:

ab

a07

com

b.a

llC

hann

els:

C

hl

Ch2

C

h3

Ch4

C

h5

Ch6

C

h7P

lott

ed:

20:0

5 Ju

n

10,

1997

< EM

I -

Ele

ctro

Mag

neti

c In

stru

men

ts

>

Fig.

7i

Res

isti

vit

y

(Bost

ick

Inv.

)

00

O

OCO K

O

OO

OO

OO

OO

O

.1

DE

PTH

(K

m)

Clie

nt:

Rem

ote:

Acq

uire

d:

16:0

Ju

l 11

, 19

97Su

rvey

Co

:

Rot

atio

n:F

ilen

ame:

ab

aOB

com

.all

Cha

nnel

s:

Exl

E

yl

Hxl

H

yl

Hzl

E

x2

Ey2

Plo

tted

: 16

:19

Jul

11,

1997

< EM

I -

Ele

ctro

Mag

neti

c In

stru

men

ts

Fig.

8a

APP

AR

EN

T

RE

SIST

IVIT

Yn

ort

h

of

Beatt

y

ON

o

o o 1 1

« §

p -

o

s 1-1

_-

"'

"1"

1 1

1 1

! 1

1

- 1 *

^ :

i i

i i

i r

1 1

®

©

©

©

*

x

x

x

i - 1

-j

r j"T

rr

®

©

x

ic

X

1 1

1 1

1 1

© 1 1

1 1

1 1

1 1

1 1

! T"

I1

" 1

T 1

T L -

-* ! -

.

10

Cli

ent:

Rem

ote:

re

mot

e e

Acq

uire

d:

16:0

Ju

l 11

, 19

97Su

rvey

C

o:U

SGS

100

1000

FRE

QU

EN

CY

(H

z)

1000

010

0000

Rot

atio

n:F

ilen

ame:

ab

a08c

om.a

llC

hann

els:

C

hl

Ch2

C

h3

Ch4

C

h5

Ch6

C

h7P

lott

ed:

16:1

9 Ju

l 11

, 19

97<

EMI

- E

lect

roM

agne

tic

Inst

rum

ents

>

Fig.

8b

-180 -135

DEGREES-90 -4545

££ > » QM O TO P.

3f*& 0 * "0 2C g CO fc» »O ^ °

CO 0 ^ ^0

& * !» *

t 'k-.

*-»

SOso

*J 0

Op' ' *J °oo S

SCJM

Sr 9 S c? 2 P p « <-f Hw J | 3 P M^

H P- « 5 O y s ^-, " sr S R a g 1 NO

L*J O5 b^ ^--^^ mJ ^} CT

^ ° ^ i o ^ 9 2 j~l ^ ^ Q

ff fr S P 9

? ? & £r^ i-1 H-- |»k O0 50 O o

SO M OC* ^1 ^ O

1" 5 ri 01

3 9

M '"*v ^2 ° ^ o '

I 1

-

-

.

; *-

X

X

K

X

;i

X

" ' X '

X

L.

1 1

I 1

K

X

X

_U 1f\

1 1

1 '

1 1

1 1

1 1

1 '

r-©-,

a

0

00

a

c

i

r9-,

1 1

! 1

I

©

0

.

-

^

0 :

-

o

-

:i i

h- 1

-dMP^sT{

QT3S

wW

O

?o

CdPf^

<^"

OOO

RO

TA

TIO

N

AN

GLE

no

rth

of

B

eatt

y

tfl w Q

o CM o «D I O

CM O

CO

x

x

x

x

X

x

10

Cli

ent:

Rem

ote:

re

mo

te

eA

cqui

red:

16

:0

Jul

11,

1997

Sur

vey

Co:

USG

S

100

1000

FRE

QU

EN

CY

(H

z)

1000

010

0000

Rot

atio

n:F

ilen

ame:

ab

aOO

com

.all

Cha

nnel

s:

Chl

C

h2

Ch3

C

h4

Ch5

C

h6

Ch7

Plo

tted

: 16

:19

Jul

11,

1997

< EM

I -

Ele

ctro

Mag

neti

c In

stru

men

ts

>

Fig.

8d

IMPE

DA

NC

E SK

EWn

ort

h

of

Bea

tty

00

to

<o CV!

10

Clie

nt:

Rem

ote:

re

mot

e e

Acq

uire

d:

16:0

Ju

l 11

, 19

97S

urve

y C

o:U

SGS

100

1000

FRE

QU

EN

CY

(H

z)

1000

010

0000

Rot

atio

n:F

ilen

ame:

ab

a08c

om.a

llC

hann

els:

C

hl

Ch2

C

h3

Ch4

C

h5

Ch6

C

h7P

lott

ed:

16:1

9 Ju

l 11

, 19

97<

EMI

- E

lect

roM

agne

tic

Inst

rum

ents

>

Fig.

8e

£L

COHERENCY

3 op*

00

.2.8

rQ§'

X *- rt M <D M- O £+

<D <1> p.

w ^ i O o* ow o 5T >-

o?"

fCO

oo

JO

A ^ ft a x «o SK* 5+ c"3 <"^ 2 S Q i^ M (+ M ^» >^ ^

& P- S § o' > . " 5*8 H Kg

^ " " ^ SL*d Cft h«rf Li ^M! .. ^j QT

|gg| ^^ ^^ Ej 0? 3

Q ** Q b<1> " tO > -^ ^rt co Q o

B^^^ §

d d

§ 9ff *

{3* t-»v <2 ° «

i i i

-

-

--

- 1 1 1

i i i

1 1 1

i i i

1 1 i

1 1 1

X

O

1 1 1

1 1 1

o x :

a

ex.

Or

O

-

O X

O X 0

X

x_-

O-

-

-

0o -

X

X

X

-

-

1 I 1 -

M

s aIT1H

O Op*

0o -J

c-fcr

o

cdCD P rf ^"

.2

MAGNITUDE

.4 .6 .8

oreoo

ore

§1 i §' 3 M. o 2. ^ 3 £" pr

^ K- i O 5? g.* * TO k«*

0cf *H- '

1 kI-*

SO

o

JO CJ W A hd ^^ *^j trt '"^

glill 3 5 a- <t a o x s ^^^ m t^ ^ri ^^

' H " " ^oM^* ^^ 0 ga ^j *~.<i> ro )_k p

1^1 p p

M ' ^* <*s ®

FSK 13 ^ g en

S- O)

v g So o o o

1 1 1

-

: MM

. -*^

I

-

-H-1

-III

I I I

X

1 1 1

I I I

1 1 1

w

1 1 1

I I I

1 1 1

I I I

-

I

-

1 1 1 -

H i <

W

21H-H

HCJ

w

£3 o"Sr»-H*<

O

cdCD P

rt ff o "iC! | O3 » »Q C35 OW O ST

(W

00

W ? g P S-

, " ff S ??

ro0p

o

01

tf

DEGREES

-180 -120 -60 0 60120

wcO

No

o o o

1 1 1 1 11 1 1 1 I

i i i i i

I I I I I -o o o

W

H S3

north

CD

POL

AR

PL

OT

Sn

ort

h

of

Bea

tty

Os

X ^

' \

CD\

\ \

\ 1

V

's.

/

/

*X.

CD

i \

x \

v^

\

\ V

\

*»v

\

"--

-_-'

"

/"

"s^

D

'

*~

N.

\

<#>

\

"X»

\

*X

'

4.39

4 H

z12

2 H

z88

5 H

z

''

^^v

D

\ \ xx

s

xx

X\

\ x

^ S \

\ /

:''"

"~V

-"X

V"-

x...J

Q%

5(.

.-'''^

^^

12.2

07

Hz

160

Hz

2420

H

z

' ^x

v n

\ v\

\ xs

s v^

\

\

Xv

^ 1

»,

1 \

1

^v

/

^"

~v

v

; ^

1 > ;c

\

\ '

^ ^ /

(

\ \

xv \

s /

V

f

41.5

04

Hz

270

Hz

3550

H

z

/ \

/ \

> \

! i

; i

i t

1 '

\ /

^

y

'

X

ff

N

/

\ '

>

\ \

v

----

-

-~^

n

/ \

/ N

,

\ .

\,

\

1

N

/

79.0

00

Hz

580

Hz

1159

0 H

z

Cli

ent:

Rem

ote:

re

mot

e e

Acq

uire

d:

16:0

Ju

l 11

, 19

97S

urve

y C

o:U

SGS

Rot

atio

n:F

ilen

ame:

ab

aOS

com

.all

Cha

nnel

s:

Chl

C

h2

Ch3

C

h4

Ch5

C

h6

Ch7

Plo

tted

: 16

:20

Jul

11,

1997

< EM

I -

Ele

ctro

Mag

neti

c In

stru

men

ts

>

Fig.

8i

Res

isti

vit

y

(Bost

ick

Inv.)

o

o

oo

en

K

W

H

O

oo

oo

Oo

.1

DE

PTH

(K

m)

Cli

ent:

Rem

ote:

Acq

uire

d:

20:3

Ju

n

10,

1997

Sur

vey

Co:

Rot

atio

n:F

ilen

ame:

ab

a09c

omb.

all

Cha

nnel

s:

Exl

E

yl

Hxl

H

yl

Hzl

E

x2

Ey2

Plo

tted

: 20

:49

Jun

10,

1997

< EM

I -

Ele

ctro

Mag

neti

c In

stru

men

ts

Fig.

9a

APP

AR

EN

T

RE

SIST

IVIT

Ynort

h

of

Beatt

y

oo

o

o

o

rv*

°M

H

ow

S

H O

S

(

3;

x0©

<D

10

Cli

ent:

Rem

ote:

re

mot

e e

Acq

uire

d:

20:3

Ju

n

10,

1997

Sur

vey

Co:

USG

S

100

1000

FRE

QU

EN

CY

(H

z)

1000

010

0000

Rot

atio

n:F

ilen

ame:

ab

a09c

omb.

all

Cha

nnel

s:

Chl

C

h2

Ch3

C

h4

Ch5

C

h6

Ch7

Plo

tted

: 20

:49

Jun

10,

1997

< EM

I -

Ele

ctro

Mag

neti

c In

stru

men

ts

>

Fig

. 9b

6L

<wVO

COS5 Q 2 *

III aS-rr <&

o o

co to O OCO CO

remote

CO CO

^ M2 p

O "^ 50tr Si o p <5 ^

£. 3 2 a « R

0o"

o

ro

O 05

5 e* ^£L

O v- CO

cr1 «oof?

g

O)

-180

50 M JO

aN

-135

DEGREES

-90 -45 045

o

00

> o0 0

» koo

t 1. 0

1 !

-

-

w

X

X

X

X

X

" '

: *

Hi

HH

1 1

1 1

W

X

X

_J

1 1

1 1

1 11 1

1 1

r-e-i

e.

e

e0©

©

e

a

i <

rOn

1 1

1 I

-

-

-

-

-

-

© :

e-

©

5 ---

Q

-

1 1

13 M

nM

tJH|H

P

£3 O "-Sr*srO

ccCT5

08

-180 -120

DEGREES -60 0 60120

GO > 70 Op o CD jr*» >J2 P CD< Pf g P^ T f* ^*o&"O ^

a g w 55 e £ O O O O

w w CD"e_PP

I » 0

« S o ^ ?D ^d ®

flro *^2 50

Q* "pH

A T3 O ^ JO rt

5 ??? ^« ? P P » 3 g CD p 59 SI ^S H- i i f^ ro D O O

££ P B x~v O» o> r. ^ o

10 o « NESpgg- CD .fk. H-. (9 O CD OS* n ® o ^ pr 2

I§NI 5 TO O O* oP t± P* b o CD _O CO !-. O

O t_i. Oto P" ET to tf*-

P "»2w 0^T 8g w 5

1 1 1 1 1

--

-'-"

----

;

3

-

-

_

""-

_

- i i I I I

l 1 l l l

1 1 1 1 1

l l l l l

X

X

X

X

X

X

X

X

X

1 1 1 1 1

1 1 1 1 1

XX

X

X

X

1 1 1 I 1

1 1 1 1 1

X

1 1 1 1 1

1 1 1 1 1

--

:~~

---

:

-

-

_~-I

,,,,,:

50OH

H O

^^

§£Liprj

gO

?

O

Cd CD P3

s s § g. 5 § (A

IMPE

DA

NC

E

SKEW

nort

h

of

Beatt

y

oo

CO

1010

0 10

00

FRE

QU

EN

CY

(H

z)

1000

010

0000

Cli

ent:

Rem

ote:

re

mot

e e

Acq

uire

d:

20:3

Ju

n

10,

1997

S

urve

y C

o:U

SGS

Rot

atio

n:F

ilen

ame:

ab

a09co

mb.a

llC

han

nel

s:

Chl

C

h2

Ch3

C

h4

Ch5

C

h6P

lott

ed:

20:4

9 Ju

n

10,

1997

< EM

I -

Ele

ctro

Mag

net

ic

Inst

rum

ents

Fig.

9e

.2

COHERENCY .4 .6.8

CO !> JT3 OP O CD P* < 02 B CD

£ * 5 P CD f^» U ^p

CO COP- "

*JGO M P ^Q O O Ow w c7

5* "p^p

a 5 HH § CTQ CD 2

2 W~» ,O

* 2g2£ %£ p* 2 sr o M £ P P £ 9 g co p p £ K h-

S P. co R 0 0 ^_ P B ^^ ow co K -O o

M ^ m N HH >y o p ^^^ 2 9 pr o-05 ^x h- 5»O to O

^ « ??o ^ p- 2

f §NB S TO O O' oP tt P" P o CO p W p; O

o' ,-. oCD P*

ff CD *"P -^S- oH crcm g 1 g §

i i i

---

:**

-----:

:

;

.

~-

I

1 l l

1 l l

1 1 1

1 1 l

1 1 1

l l 1

1 1 1

1 l 1

-

"

-

o x :~O X

O X.

0 X.

ox-o x-

O XI

oxO X

oX xo~

ax -

d° ;x o -

Q

X 0

_--

_

1 1 1

M

atrH

o ocr

p Sr*tr

o5

cdPr* J

P S S

SOera

00 > 33 O C o a> £1

11II fD CD "

o a w

*Jn>

10 B o o w ff

pwp

A ^TJ (^^ ^CJ5" P" ^i p re

M ? P Pg» OD ^S is.

h* Oco pr CO if^- vl

O

Ul

n

TO

p P ? S-l R i

7\3 > \ .> hrl >^ c. J pP 9 p- cr re >f*. ^ pO CD O£ o ® O c_ p- O?§NB

TO O CJ1P tt P* Pre p co S.

50 W JOd w2!

N

MAGNITUDE0

o

o o

h*o o

OOOOOT OOOOT

.2 .4 .6 .8 1i i i

-

: ' * * '

L-#-1

_

- *#

:i

:

i X I

i i i

g i

i i i

i i i

i i i

i i i

i i i

i i i

i i i

i i i

j

-

-

'-

-

;

|

III"

H^

Ma

MAGNl

HaM

o

cr o

co

era voBT

-180-120DEGREES

-60 0 60120CO > fO O (3 o re JT!

<J C P p re e« o £.*&-"O "«

C pCO fO P ! "*O o o ow w re"

ef Q

P

p

5 * § to ^g t?

W

A TJ O TJ fO tfl 5T P* SI' O "-T*? »» ^ S1 o

M ? P P 2. 3 g re p p JT. ^ H*5 ^ a 5 g 8i - a - a ° spgg. ^ re £ji i ' p 2. o o £ o £>0 5? P" § S P ^ § P p P oW O C71 oP |± P" p Ore p CJ 5- o

O H* OCD P"

r ^ ^ P <f

1 °i ^ o5 0 1 re _ oa 5 8 CO

1 1 i 1 1

-

- 1 1 1 1 1

1 1 1 1 1

1 1 1 I 1

1 1 1 1 1

1

-*-

X

X

X

Xw

X

HH

1 1 1 1 1

1

1 1 1 1 1

1 1 1 1 1

1 1 1 1 1

1 1 1 1 1

:

-

-

-

:

i i i i i

TIPPER ST

53HH

w

north

o

03 fl> P

3

POL

AR

PL

OT

Sn

ort

h

of

Bea

tty

oo

4.394

Hz

12.207 Hz

41.5

04 Hz

79.0

00 Hz

122

Hz

160

Hz

270

Hz

580

Hz

BBS

Hz

2420 Hz

3550

Hz

11590

Hz

Rotation:

Clie

nt:

File

nam

e:

aba0

9com

b.al

l R

emot

e:

rem

ote

e C

hann

els:

C

hl

Ch2

C

h3

Ch4

C

h5

Ch6

C

h7A

cquir

ed:

20:3

Ju

n

10,

1997

Plo

tted

: 20

:50

Jun

10,

1997

Su

rvey

C

o:U

SGS

< EM

l

Ele

ctro

Mag

net

ic

Inst

rum

ents

>

Fig.

9i

Res

isti

vit

y

(Bost

ick

Inv

.)

00

Os

0 o

«

o

x

Xo

c

-

- -

X

X

X

0

xx

- x

xx

x x

xx

oO

o °

°

o o

1 1

1 1

1 1

1 1

.1 1

DE

PTH

(K

m)

Rota

tion:

Cli

ent:

F

ilen

ame:

b

bal

Oco

m.a

ll

Rem

ote:

C

hann

els:

E

xl

Eyl

H

xl

Hyl

H

zlA

cqui

red:

14

:1

Sep

05

, 19

97

Plo

tted

: 10

:44

Sep

17

, 19

97S

urve

y C

o:<

EMI

- E

lect

roM

agne

tic

Inst

rum

ents

Fig.

lOa

APP

AR

EN

T

RE

SIST

IVIT

Yn

ort

h

of

Bea

tty

oo

o

o

o

05

q

£

l i

t i

i 1 1

**

1010

0 10

00

FRE

QU

EN

CY

(H

z)

1000

010

0000

Cli

ent:

Rem

ote:

re

mote

e

Rot

atio

n:

Fil

enam

e:

bbal

Oco

m.a

llC

han

nel

s:

Chl

Ch2

C

h3

Ch4

C

h5

Ch6

Acq

uire

d:

14:1

S

ep

05,

1997

P

lott

ed:

10:4

4 S

ep

17,

1997

Sur

vey

Co:

USG

S<

EMI

-

Ele

ctro

Mag

net

ic

Inst

rum

ents

Fig.

lO

b

IMPE

DA

NC

E PH

ASE

no

rth

of

B

eatt

y

oo 00

10

o

o OJ I irt n *H

1 o

*-*

-

* *

i i

i i

1 1

1010

0 10

00

FRE

QU

EN

CY

(H

z)

1000

010

0000

Rota

tion:

Cli

ent:

F

ilen

ame:

bb

alO

com

.all

R

emot

e:

rem

ote

e

Chan

nel

s:

Chl

C

h2

Ch3

C

h4

Ch5

C

h6

Acq

uire

d:

14:1

S

ep

05,

1997

P

lott

ed:

10:4

5 Se

p 17

, 19

97

Sur

vey

Co:

USG

S <

EMI

- E

lect

roM

agne

tic

Inst

rum

ents

Fig.

lO

c

68

3w*

co> ?o nS

8

^ *fl C"5 ^3 50

S?il w £ P P 2. g- re p p £"" &!§

M o

o en

oI*!;

n cr "* 2*h P

H*

s* 5B

g fc

0 5 g H «O S.F -I ^ff 9 p en

I 5 p %

50 W <Oa w2

N

-180-120-60DEGREES

060120

o

H*Oo

H*

o5{"}

H*Oo o o

OOOOOT

i i i i i

__--;

-

j

-

- 1 1 I 1 1

X

1 1 1 1 1

X

X

1 1 1 1 1

1 1 1 1 1

X

X

X

X

X

X

X

X

X

X

X

1 1 1 1 1

1 1 1 1 1

1 1 1 1 1

1 1 1 1 1

-

.-

-

:

-

\

-

i i i i i ~

50O

O 25

25 O

IMPE

DA

NC

E

SKEW

nort

h

of

Beatt

y

h*;

1010

0 10

00

FRE

QU

EN

CY

(H

z)

1000

010

0000

Cli

ent:

Rem

ote:

re

mote

e

Acq

uire

d:

14:1

Se

p 05

, 19

97S

urve

y C

o:U

SGS

Fig.

10e

Rot

atio

n:

Fil

enam

e:

bbal

Oco

m.a

llC

han

nel

s:

Ch

l C

h2

Ch3

C

h4

Ch5

C

h6P

lott

ed:

10:4

5 Se

p 17

, 19

97<

EMI

-

Ele

ctro

Mag

net

ic

Inst

rum

ents

16

COHERENCY.2.4.6.8

03 > 70 Oi- o CD n: i-j X3 B CD

CD P. 0 g.o!""° 2a § 03 H- P H*O ^ o ow £ cT

tf» x)

o

CD OO ^^ G^

M

A TJ C2 ^ J8 W5- p- S o §

«?§SS; 3 g CD p 09 ff ^ H*

-^ IB g _ 8 ( w CD R ^ o*o

S3 9 p? ^ CD 4^- (-* P>o m H*JT ,-N O

3 # ^§ f'S N§

p^si 1 CD - W ^ O

^Sgp 1 ^ *» p -^ ^S1 ?I w s

i i i

-

-

:

-iii

i i i

i i i

i i i

o

X

1 1 1

1 1 1

0 X

X

1 1 1

1 1 1

-

--

x o :~X

8

X .

»-

OX-

X &

SoOo-

8

X

I

-

-

o x"

-

1 1 1

W

dc^H

0O cr

S3 O *1r*sr oT^

cd r& P

§ s § D " O?» "^ OCO

16

.2MAGNITUDE

.4 .6 .8

wi-*o era

CO > ?0 0(3 o re p;

3 *§ 1 s Cp £ < u ^

CD £o rr0 2 e oo H* B j± Q if* O O

1-oen >

t I-*CD OCD hrj O

JOa A -0 0 21 70 M

5* " - SL Z £;. P 2 £T o w £ P P 2. 3 g re p p ff ^ H- S P- S B o g

1 «?» P. ^ o*o

w o 2 g >-CP )f^ H* Po cn M. JT o O . -. * « o0 SP P* o f-3 5I 5 TO .. O p op ts p* £ § CO » W O

f tt o CD ry 1 1®^.P ^

1 9g ^ 0

i i i_~-: _^

- *^

L^j

: ^: ^

1 X '

-

_

<-*r-t

-

~-

i x '--

:1 1 1

1 1 1

,

1 1 1

1 1 1

1 1 1

1 1 1

1 1 1

1 1 1

1 1 1

1 1 1

-

I

-

.-

:

-

_

-

-

;

-

-

\

III"

HN"«4"0 ^MS3

sdNITUD

M

S3 O"1

S?

o"^

w a? P

^

1 g 8& S §

DEGREES

GO > ?8 O

| |||

O ..

a a GO H- P H; O £ O O

tf»

O

H- M 05 O50 hq o

JO

A TJ O ^ W M

2 CD H P £ ^S ( S P- S R O Oj " M" CD P ^ §

W .^ O p OP -3 P" C O CD - CO ^ O ^*

CO r^

i " sS P* O?* o» o

180 -120 -60 0 60 120

;~-

-

-

-

:

-

-

- 1 1 1 1 1

11111

i i t i I

I I I I I

i

s.

1 1 1 1 1

.....

>-*-'

^e

X 1

-*-

t5L

L.

1 1 1 1 1

1 I 1 1 1

X '

1 1 1 1 1

1 1 1 1 1

-

-

-

-

-

-

-

1 1 1 1 1 "

HHH

MHrl

J STRIKE

?

0

CO 0>

POL

AR

PL

OT

Sn

ort

h

of

Bea

tty

4.39

4 H

z 12

2 H

z 88

5 H

z

12.2

07

Hz

160

Hz

2420

H

z

41.5

04

Hz

270

Hz

3550

H

z

79.0

00

Hz

580

Hz

1159

0 H

z

Rot

atio

n:

Clie

nt:

Fil

enam

e:

bb

alO

com

.all

Rem

ote:

re

mot

e e

Cha

nnel

s:

Chl

C

h2

Ch3

C

h4

Ch5

C

h6

Ch7

A

cqui

red:

14

:1

Sep

05,

1997

Plo

tted

: 10

:46

Sep

17

, 19

97

Sur

vey

Co:

USG

S <

EMl

- E

lect

roM

agn

etic

In

stru

men

ts

>

Fig.

10!

Res

isti

vit

y

(Bost

ick

In

v.)

o

o

Cli

ent:

R

emot

e:

Qx

XX

X

.1

DE

PTH

(K

m)

Rot

atio

n:

Fil

enam

e:

bb

ailc

om

.all

Cha

nnel

s:

Exl

E

yl

Hxl

H

yl

Hzi

E

x2A

cqui

red:

13

:3

Sep

17,

1997

P

lott

ed:

13:5

7 Se

p 17

, 19

97S

urve

y C

o:<

EMI

- E

lect

roM

agne

tic

Inst

rum

ents

Fig.

Ha

APP

AR

EN

T

RE

SIST

IVIT

Ynort

h

of

Bea

tty

0 0 o

C/D

0

W o

3 H

- - I

X

- : -

<C

m

*

«

0

*

o o

*g

^

§; x

41 ^

*f

T

1 1

1 1

1 1

1 1

: -

if

iJ

- -

1 1

1 1

1 1

1 1

10

100

1000

10

000

1000

00

FRE

QU

EN

CY

(H

z)

Cli

ent:

Rem

ote:

re

mote

e

Acq