hanson et al. 2012 3d projection of the southern mid-continent basement-rock surface

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New insights into the Early Cambrian igneous and sedimentary history of the Southern Oklahoma Aulacogen from basement well penetrations Robert E. Puckett Jr., Richard E. Hanson, G. Randy Keller, Matthew E. Brueseke, Casey L. Bulen, Amy M. Eschberger, Stanley A. Mertzman

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Page 1: Hanson et al. 2012 3D Projection of the Southern Mid-Continent Basement-Rock Surface

New insights into the Early Cambrian igneous and sedimentary history of the Southern Oklahoma Aulacogen from basement well penetrations

Robert E. Puckett Jr., Richard E. Hanson, G. Randy Keller, Matthew E. Brueseke, Casey L. Bulen, Amy M. Eschberger, Stanley A. Mertzman

Page 2: Hanson et al. 2012 3D Projection of the Southern Mid-Continent Basement-Rock Surface

Hanson et al. 2012

Page 3: Hanson et al. 2012 3D Projection of the Southern Mid-Continent Basement-Rock Surface
Page 4: Hanson et al. 2012 3D Projection of the Southern Mid-Continent Basement-Rock Surface

3D Projection of the Southern Mid-Continent Basement-Rock Surface

Page 5: Hanson et al. 2012 3D Projection of the Southern Mid-Continent Basement-Rock Surface

Puckett et al., 2014

35 km

Washita Valley Fault and Overthrust Penetrations Western Arbuckle Mountains

42 overthrust drilling penetrations Accessible samples from 21 wells 26.6 km of uncorrelated igneous section

Page 6: Hanson et al. 2012 3D Projection of the Southern Mid-Continent Basement-Rock Surface

Oklahoma Geological SurveyGuidebook 38

2014

Page 7: Hanson et al. 2012 3D Projection of the Southern Mid-Continent Basement-Rock Surface

34

km N

on

-Co

rrel

ate

d C

ross

Se

ctio

n

Page 8: Hanson et al. 2012 3D Projection of the Southern Mid-Continent Basement-Rock Surface

Mafic Rock Photomicrographs

Page 9: Hanson et al. 2012 3D Projection of the Southern Mid-Continent Basement-Rock Surface

Mafic Rock Geochemistry

Pan Am Newberry Sec. 13-T1N-R3WPan Am Williams Sec. 20-T1N-R2WPan Am Jarman Sec. 19-T1N-R2W

Characterized as broadly transitional tholeiitic basalts to andesites from

multiple overlapping eruptive systems. Similar to OIB and other

continental flood basalts originating from an enriched mantle source.

Modified from Brueseke et al. 2014

Page 10: Hanson et al. 2012 3D Projection of the Southern Mid-Continent Basement-Rock Surface

Rhyolite Photomicrographs

Page 11: Hanson et al. 2012 3D Projection of the Southern Mid-Continent Basement-Rock Surface

Rhy

olite

Geo

chem

istr

y

Dominantly rhyolites and peralkaline rhyolites

Highly fractionated – Depleted Sr, P, Ti - Typical A-type signature

Typical within Plate, A-type, consistent with emplacement in alaucogen type setting

Page 12: Hanson et al. 2012 3D Projection of the Southern Mid-Continent Basement-Rock Surface

Outcrop-Based Generalized Cooling Unit DiagramSurface Exposures of the Carlton Rhyolite in the Wichita Mountains

From Puckett et al. 2011

Page 13: Hanson et al. 2012 3D Projection of the Southern Mid-Continent Basement-Rock Surface

Rhyolite Cooling Unit Pan American Oil Co. Moore #1-A Sec.20 T1N-R2W

Page 14: Hanson et al. 2012 3D Projection of the Southern Mid-Continent Basement-Rock Surface

Rhyolite Glassy Flow Margin Kaiser Francis/Westheimer-Neustadt Chapman #1 Sec.9-T2S-R2E

Rhyolite glassy flow

margin (Dark Brown

cuttings)

Flow interior 40 m below

glassy margin sample above

Page 15: Hanson et al. 2012 3D Projection of the Southern Mid-Continent Basement-Rock Surface

Well log interval from the COHO Resources Story #4 (18-1N-2W), showing gamma ray and induction logs and corresponding lithologic log.

Gamma Ray, Induction Log, and Lithologic LogCOHO Resources Story #4 Sec. 18-T1N-R2W

Page 16: Hanson et al. 2012 3D Projection of the Southern Mid-Continent Basement-Rock Surface

Phreatomagmatic Interval – Magma in Contact With Ground WaterPan American Oil Co. Whyte #1 Sec. 21-T1N-R1W

Page 17: Hanson et al. 2012 3D Projection of the Southern Mid-Continent Basement-Rock Surface

Clastic SectionPan Am Jar man #1Sec. 19-T1N-R2W

1.14

km

42

6 m

Page 18: Hanson et al. 2012 3D Projection of the Southern Mid-Continent Basement-Rock Surface

Puckett et al., 2014

35 km

Washita Valley Fault and Overthrust Penetrations Western Arbuckle Mountains

42 overthrust drilling penetrations Accessible samples from 21 wells 26.6 km of uncorrelated igneous section

Page 19: Hanson et al. 2012 3D Projection of the Southern Mid-Continent Basement-Rock Surface

1.2 km Cumulative Volcaniclastic Interval Intercalated with RhyoliteFrankfort Oil Co. Sparks Ranch #1 Sec. 32-T1S-R1W

Page 20: Hanson et al. 2012 3D Projection of the Southern Mid-Continent Basement-Rock Surface

Post Volcanic Sedimentation close to the Rift AxisFrankfort Oil Co. Sparks Ranch Sec. 32-T1S-R1W

Page 21: Hanson et al. 2012 3D Projection of the Southern Mid-Continent Basement-Rock Surface

Reagan Islands

• Positive relief features that resisted inundation until Latest Cambrian/Early Ordovician

• Identifiable by the absence of Reagan Sandstone resulting in Arbuckle Group carbonates unconformably overlying the Early Cambrian volcanic rocks.

• Also found in the Wichita Mountains at Balley Mountain and the Slick Hills

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Page 24: Hanson et al. 2012 3D Projection of the Southern Mid-Continent Basement-Rock Surface

Modified from Campbell and Weber 2006

Page 25: Hanson et al. 2012 3D Projection of the Southern Mid-Continent Basement-Rock Surface

FAULT

POSSIBLE FAULT

SOHIO Traub #1-3Sec. 3-T6N-R14W6.8 km NNE of Bally Mountain

2.48 km beneath surface

6.19 km beneath surface

415 m thick basalt interval with 35 m rhyolite dike/sill

104 m thick basalt interval

229 m thick basalt interval

Page 26: Hanson et al. 2012 3D Projection of the Southern Mid-Continent Basement-Rock Surface

Helmerich & Payne McNutt Unit #1

Sec. 23-T9N-R26W

2.91 km

Surface

4.35 km

4.9 km(minimum)

Normal fault

5.48 km Total Depth

2.91 km ofPermian and Pennsylvanian sedimentary rocks including Granite Wash

1.44 km ofDiabase, Diorite, and Granite

850 m of Gabbro

3 m core of amphibolite and quartzo-feldspathic gneiss

Poss. Fault indicated on Caliper log

2.49 km

280 m of metamorphic rocks

Page 27: Hanson et al. 2012 3D Projection of the Southern Mid-Continent Basement-Rock Surface

5,436.5 m

5,467.8 mPhoto by OGS Core Facility Staff

Page 28: Hanson et al. 2012 3D Projection of the Southern Mid-Continent Basement-Rock Surface

Penetratively folded tonalitic gneiss

Amphibolite with migmatitic quartz-feldspar patch.

Hornblende Biotite

Light green areas on hornblende represent partial retrogression to actinolite. PPL Field width 5mm

Sericitized plagioclase

Page 29: Hanson et al. 2012 3D Projection of the Southern Mid-Continent Basement-Rock Surface

The Southern Oklahoma Aulacogen contains a minimum emplaced volume of 250,000 km3.

Igneous activity was voluminous, strongly bimodal, and intercalated. Coeval mafic and felsic volcanism phases overlap.

Felsic magmas were A-type, mafic magmas have an EMI-OIB signature. Eruption products are lava-dominated - Rhyolitic pyroclastic deposits are limited to thin beds between flows - Basalt pyroclastic deposits seem to be primarily sourced from phreatomagmatic eruptions.

Cratonic-sourced sedimentation into the rift was active during volcanism and defines a negative topographic profile after volcanism ceased.

Intercalated rhyolites and basalts are present in the subsurface throughout the aulacogen.

Summary