November 2017 Newsletter CC - Alaska Geological Society 2017 Newsletter.pdf · Volume 48 Number 3...
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Volume 48 Number 3 November, 2017 Page 1 A L A S K A G E O L O G Y Alaska Geological Society Newsletter of the A L A S K A G E O L O G I C A L S O C I E T Y S G A New Geologic Interpretations from beneath the Chukchi Sea: Offshore Alaska, USA Thomas X. Homza Shell Exploration & Production Company, Anchorage, AK [email protected] In the context of Shell’s recent suspension of exploration activities in the Chukchi Sea and in the spir- it of knowledge retention, we present some key details of Shell’s regional geologic model for the US Chuk- chi Sea. Our model builds on the work of many predecessors, including those from the USGS and BOEM, and it comprises interpretations from modern 3D seismic data as well as re-interpretations of well data. We present a Devonian-through-Cenozoic tectono-stratigraphic evolutionary model that in- cludes several previously under-reported elements and events. These include: regional Devoni- an orogenic collapse; Jurassic karst formation on the Crackerjack Ridge; rift-related Jurassic maf- ic submarine magmatism in the Burger area; regional Berriasian-Hauterivian foreland flexural uplift that produced the Lower Cretaceous unconformity; Neocomian salt withdrawal from the Popcorn Trough; Barre- mian contractional tectonism above the northern Hanna Trough; widespread Cenomanian uplift and erosion; extensive Maastrichtian-aged transpressional inversion that drove the formation of a regional anticlinorium beneath the central Chukchi Shelf and, among others, several stages of Paleogene transtensional collapse. Although we contend that the US Chukchi Sea is a prolific petroleum province, we don’t discuss petroleum systems here; rather our focus is on observations and geologic interpretations that we hope will contribute to the understanding of the tectono-stratigraphic evolution of the Chukchi Sea and the wider circum-Arctic region. AGS Luncheon Date & Time: Tuesday, November 21, 11:30 am – 1:00 pm Program: New geologic interpretations from beneath the Chukchi Sea: Offshore Alsaka,USA Speaker: Thomas Homza, Shell Exploration & Production Company, Anchorage, AK Place: BP Energy Center, 1014 Energy Court, Anchorage, AK Reservations: Make your reservation before noon Friday, November 17, 2017 Cost: Seminar is free (catered lunches are no longer available) Fell free to bring your own brown-bag lunch For more information call (907) 854-2363 or visit the AGS website: http://www.alaskageology.org
Transcript of November 2017 Newsletter CC - Alaska Geological Society 2017 Newsletter.pdf · Volume 48 Number 3...
Volume 48 Number 3 November, 2017 Page 1
ALA SKA GE OLOGY
Alaska Geological SocietyNewsletter of the
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New Geologic Interpretations from beneath the Chukchi Sea: Off shore Alaska, USA
Thomas X. HomzaShell Exploration & Production Company, Anchorage, AK
In the context of Shell’s recent suspension of exploration activities in the Chukchi Sea and in the spir-it of knowledge retention, we present some key details of Shell’s regional geologic model for the US Chuk-chi Sea. Our model builds on the work of many predecessors, including those from the USGS and BOEM, and it comprises interpretations from modern 3D seismic data as well as re-interpretations of well data.
We present a Devonian-through-Cenozoic tectono-stratigraphic evolutionary model that in-cludes several previously under-reported elements and events. These include: regional Devoni-an orogenic collapse; Jurassic karst formation on the Crackerjack Ridge; rift-related Jurassic maf-ic submarine magmatism in the Burger area; regional Berriasian-Hauterivian foreland fl exural uplift that produced the Lower Cretaceous unconformity; Neocomian salt withdrawal from the Popcorn Trough; Barre-mian contractional tectonism above the northern Hanna Trough; widespread Cenomanian uplift and erosion; extensive Maastrichtian-aged transpressional inversion that drove the formation of a regional anticlinorium beneath the central Chukchi Shelf and, among others, several stages of Paleogene transtensional collapse.
Although we contend that the US Chukchi Sea is a prolifi c petroleum province, we don’t discuss petroleum systems here; rather our focus is on observations and geologic interpretations that we hope will contribute to the understanding of the tectono-stratigraphic evolution of the Chukchi Sea and the wider circum-Arctic region.
AGS LuncheonDate & Time: Tuesday, November 21, 11:30 am – 1:00 pmProgram: New geologic interpretations from beneath the Chukchi Sea: Off shore Alsaka,USA Speaker: Thomas Homza, Shell Exploration & Production Company, Anchorage, AKPlace: BP Energy Center, 1014 Energy Court, Anchorage, AKReservations: Make your reservation before noon Friday, November 17, 2017Cost: Seminar is free (catered lunches are no longer available)
Fell free to bring your own brown-bag lunchFor more information call (907) 854-2363 or visit the AGS website: http://www.alaskageology.org
Volume 48 Number 3 November, 2017 Page 2
About the Speaker:Tom Homza has been Shell’s Principal Regional Geologist for Alaska since 2005. Although there have been
several detours over the years to various basins & assignments, he has primarily worked exploratory projects along the Arctic rim from NE Siberia to the Sverdrup Basin with a focus between the Russian border and the Mackenzie Delta. Prior to Shell, Tom worked as Alaska Offi ce Manager and Senior Exploration Geologist for Encana Oil & Gas and he held various roles at BP in Anchorage and in London from 1994-2002. He is a past President and Vice President of AGS. Tom received his BSc in Geology from the University of Vermont in 1989, his MSc in Structural Geology from UAF in 1992, and his PHd in Structural Geology from UAF in 1995.
From the President’s Desk:Wow it is hard to believe that winter is upon us again. I just returned from a two week walking vacation in the Provence area of southern France to fi nd winter happened while I was gone. My wife and I had a great time walking through the vine yards looking at all the limestone outcrops of southern France. It re-minded me of growing up in the limestone outcrops of Iowa (yes there were actually outcrops in Iowa).
One piece of great news for the society is that the Gem and Mineral Society have decided to set up a scholarship endowment fund and direct part of the proceeds from the fund to the Alaska Geolog-ic Society to give out as another scholarship. Our portion is expected to be $1500/year which will allow us to help another geology student working on Alaska projects. Sue Karl is pretty excited about the news.
One item the board is concerned about is the low attendance at our last two lunch meetings. If anyone has any ideas on what we can be doing to increase the numbers at our lunch meetings, please let me know.
Regards ~Larry [email protected]
Volume 48 Number 3 November, 2017 Page 3
Ninuluk Bluff
Torok Formation
Nanushuk Formation
Delta Front – Distributary Channel
EstuarineSequenceboundary
FluvialSlope Mountain
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View toward west
View toward southeast
Flow
Shoreface
ShorefaceSSSS
Shelf
Alaska Geological Society Hosts USGS Public Assessment Review
The USGS is conducting an updated assessment of technically recoverable oil and gas resourc-es in the Nanushuk and Torok Formations in NPRA and adjacent state lands and waters. In prepa-ration for the upcoming assessment, a public geology review meeting will be held in Anchorage on November 7, 2017. Primary objectives are to (1) present the geological framework on which the assessment will be based and (2) solicit feedback from the geological community regarding the geology and interpretations that represent the foundation of the assessment. An overview of meth-odology also will be included.
The meeting will be hosted by the AGS and held at the BP Energy Center, 900 East Benson Blvd, Anchorage. The presentation and discussion will be held from 8:30 to 11:00 a.m., and USGS personnel also will be available for expanded discussions in the same room from 2:00 to 5:00 p.m. Please note the room is NOT available from 11:00 a.m. to 2:00 p.m.
Attendance is open to anyone interested in the scientifi c foundation on which the assessment will be conducted. Feel free to send any questions to Dave Houseknecht at [email protected]
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Photos and interpretations courtesy of David L. LePain, DGGS
Volume 48 Number 3 November, 2017 Page 4
Volume 48 Number 3 November, 2017 Page 5
Alaska Geological Calendar of Events Alaska Geological Calendar of EventsDate Time Organization Event Location
Sept 19 11:30 am AGS Dr. Birgit Hagedorn, “Sustainable Earth Research, LLC. “Mercury cycling in the Matanuska Glacier”.”
BP Energy Center, Anchorage
Oct 3-4 WTC Arctic Ambitions VI Conferencehttps://www.wtca.org/locations/world-trade-center-anchor-age/events/arctic-ambitions-vi-intl-conference-trade-show
Sheraton Anchorage Hotel
Oct 12 GSA Airborne Imaging Conoco PhillipsAnchorage, AK
Oct 11-12 US-Canada Northern Oil and Gas Research Forum 2017https://www.uscanada2017nogf.com/
Dena’Ina Center, Anchorage
Oct 19-21 Alaska Federation of Natives Annual Convention
Dena’Ina Center, Anchorage
Oct 24 11:30 am AGS Dr. Michelle Coombs, USGS Alaska Volcano Observatory “Forecasting and detection during the 2017-2017 eruption of Alaska’s Bogoslof volcano.”
BP Energy Center, Anchorage
Nov 1 11:30 am USGS Ernest Leffi ngwell talk, Janet Collins USGSAnchorage
Nov 5-11 AMA Alaska Miners Association Annual Conventionhttps://alma.memberclicks.net/2017-convention
Dena’Ina Center, Anchorage
Nov 7 8:00-11:00 am
AGS David Houseknecht USGS “Nanushuk-Torok Assessment Review”.
BP Energy Center, Anchorage
Nov 9 GSA Rada Khadjinova & Steve Wardlow, Fugro; Geo-intelligence for Resource Development and Permitting, www.geophysicalsocietyofalaska.org
BP Energy Center, Anchorage
Nov 15-16 RDC 38th Annual Alaska Resources Conferencehttp://www.akrdc.org/conference
Dena’Ina Center, Anchorage
Nov 21 11:30 am AGS Tom Homza, Shell Exploration and Production, “A Geolog-ic Interpretation of the Chukchi Sea Petroleum Province: Off shore Alaska, USA”
BP Energy Center, Anchorage
Dec 14 11:30 am AGS/GSA Dr. Shuvajit (Jit) Bhattacharya, UAA , “Application of Predictive Data Analytics and Geostatistics for Multi-scale Shale Facies Modeling”
BP Energy Center, Anchorage
Jan 18, 2018
11:30 am AGS TBA BP Energy Center, Anchorage
Jan 22-26, 2018
Alaska Marine Science Symposiumhttps://www.alaskamarinescience.org/agenda/
Hotel Captain Cook, Anchorage
Feb 12-16, 2018
Alaska Forum on the Environmenthttp://www.akforum.org/afe/
Dena’Ina Center, Anchorage
Feb 20,2018
11:30 am AGS TBA BP Energy Center, Anchorage
March 20, 2018
11:30 AGS TBA BP Energy Center, Anchorage
March 26-31, 2018
AMA Alaska Miners Association. Spring Convention Carlson CenterFairbanks
April, 2018 AGS AGS Technical Conference AnchorageApril 24,
201811:30 AGS TBA BP Energy Center,
AnchorageMay 15,
201811:30 AGS Dr. Erin Shea, University of Alaska, Anchorage BP Energy Center,
AnchorageMay 20-23,
2018AAPG AAPG Annual Convention & Exhibition Salt Lake City, Utah
AMA: Alaska Miners Association; AGS: Alaska Geological Society: GSA: Geophysical Society of AlaskaAAEP: Alaska Association of Environmental Professionals; SPE Society of Petroleum Engineers
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Volume 48 Number 3 November, 2017 Page 6
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ROCK SOLID EXPERIENCE
www.corelab.com • 713-328-2748© 2013 Core Laboratories. All rights reserved.
The Alaska Geological Society, Inc.P.O. Box 101288
Anchorage AK 99510On the web at: http://www.alaskageology.org
The Alaska Geological Society is an organization which seeks to promote interest in and understanding of Geology and the related Earth Sciences, and to provide a common organization for those individuals interested in geology and the related earth sciences.This newsletter is the monthly (September-May) publication of the Alaska Geological Society, Inc. 300± newsletters delivered eletronically per month.
Kenneth P. Helmold (Editor)Alaska Geological Society, Inc.
P. O. Box 101288Anchorage, AK 99510
e-mail: [email protected] (offi ce)
MEMBERSHIP INFORMATIONAGS annual memberships expire November 1. The annual membership fee is $25/year ($5 for students). You may download a membership application from the AGS website and return it at a luncheon meeting, or mail it to the address above.Contact membership coordintor Kirk Sherwood with changes or updates (e-mail: membership at alaskageology.org; phone: 907-334-5337)All AGS publications are now available for on-line purchase on our website. Check to see the complete catalogue:
http://www.alaskageology.org/publications.htmADVERTISING RATES
Advertisements may be purchased at the following rates:1/10 Page--$190/9mo, $75/1mo; size=1.8 x 3.5 inch
1/4 Page--$375/9mo, $95/1mo; size=4.5 x 3.5 or 2.2 x 7.5 inch1/3 Page- $470/9mo, $105/1mo; size=7.0 x 3.5 or 3.0 x 7.5 inch1/2 Page--$655/9mo, $125/1mo; size=9.0 x 3.5 or 4.5 x 7.5 inch
Full Page--$1000/9mo, $165/1mo; size=7.5 x 9.0 inch1mo rate=(9mo rate/9)+$50 (rounded up).
Contact Keith Torrance at 907-952-1288 for advertising information.
Volume 48 Number 3 November, 2017 Page 8
2017 - 2018 Alaska Geological Society Board, Committees and Delegates
Title Name Phone e-mail Affi liationPresident Larry Smith 907-865-5803 Ljsmithak at gmail.com Brook Range Petroleum
Past-President Chad Hults 907-332-0740 chadcph at gmail.com NPS
President-Elect Greg DuBois 907-830-8360 gdubois at apcservicesllc.com APC Services LLC
Vice-President Keith Torrance 907-952-1288 ktorrance at gci.net
Treasurer Carla Sanchez Phelps 832-589-4567 carlasphelps at gmail.com
Secretary Dave Buthman 907-344-6001 dbuthman at hilcorp.com Hilcorp
Director 16-2018 Laura Gregersen 907-375-8240 Laura.gregersen at alaska.gov AK DOG
Director 16-2018 Karri Sicard 907-451-5040 karri.sicard at alaska.gov AK DGGS
Director 16-2018 Steve Wright 907-855-2363 alaskageo at aol.com Consultant
Director 17-2019 Jennifer Crews 907-263-4516 jennifer.r.crews at conocophillips.com ConocoPhillips
Director 17-2019 Kirk Sherwood 907-334-5337 sherwook at mtaonline.net
Director 17-2019 Monte Mabry 907-230-4488 monte.mabry at live.com Hilcorp
AAPG Delegate Ken Helmold 907-269-86733 ken.helmold at alaska.gov AK DOG
PSAAPG AGS Representative Ken Helmold 907-269-86733 ken.helmold at alaska.gov AK DOG
Advertising Keith Torrance 907-952-1288 ktorrance at gci.net UMIAQ
Com. Ed./Science Fair Jana DaSilva Lage 907-980-9368 jldasilva5 at hotmail.com APICC
Field Trips Chad Hults 907-332-0740 chadcph at gmail.com NPS
Bylaws Sue Karl 907-786-7428 skarl at usgs.gov USGS
Memberships Kirk Sherwood 907-334-5337 sherwook at mtaonline.net
Newsletter Editor Ken Helmold 907-269-8673 ken.helmold at alaska.gov AK DOG
Publications Mick Bradway brad8450 at yahoo.com
Scholarship Sue Karl 907-786-7428 skarl at usgs.gov USGS
Website Jan Hazen homesteadgraphics at gmail.com Consultant
Fundraising Jennifer Crews 907-263-4516 jennifer.r.crews at conocophillips.com ConocoPhillips
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