Julie A Dumoulin, Ph.D.
Carbonate sedimentology, circumpolar correlation, Paleozoic and Mesozoic stratigraphy of central and northern Alaska
Professional Experience
1979 - Present Research Geologist, USGS, Anchorage AK
Education and Certifications
Ph.D. 1991 University of California, Santa Cruz CA Geology
M.S. 1979 University of Wisconsin, Madison WI Geology
B.S. 1976 University of Wisconsin, Madison WI Geology/Anthropology
Affiliations and Memberships*
Alaskan Geological Society
American Association of Petroleum Geologists
Geological Society of America
International Association of Sedimentologists
SEPM (Society for Sedimentary Geology)
Honors and Awards
Graduate Fellowship, National Science Foundation, 1976
Graduate Training Program Award, USGS, 1985
USGS STAR awards for research and service contributions, 1997, 1999 (2), 2005, 2011
USGS Performance awards: 2010, 2011, 2012, 2013
Science and Products
Zircon U-Pb, Organic Carbon Isotope, and Geochemistry Data from the Hue Shale and Canning Formation, Arctic Alaska, 2025 Zircon U-Pb, Organic Carbon Isotope, and Geochemistry Data from the Hue Shale and Canning Formation, Arctic Alaska, 2025
This dataset contains results from three stratigraphic sections of the Hue Shale located in and adjacent to the Arctic National Wildlife Refuge in northeastern Alaska. Sample heights were measured with a tape measure in continuous successions. Zircon grains from volcanic ashes were analyzed via laser ablation at the University of California, Santa Barbara (UCSB) using a Photon Machines...
Total organic carbon, programmed temperature pyrolysis, vitrinite reflectance, organic carbon isotopes, elemental, and spectral gamma-ray data from the Cretaceous Hue Shale (Jago River outcrop), Arctic Alaska, USA Total organic carbon, programmed temperature pyrolysis, vitrinite reflectance, organic carbon isotopes, elemental, and spectral gamma-ray data from the Cretaceous Hue Shale (Jago River outcrop), Arctic Alaska, USA
Chemostratigraphic signatures were recorded in a 113 m thick outcrop of late Albian to early Campanian (~103–82 Ma) Hue Shale exposed on the bank of the Jago River in the coastal plain (“1002 Area”) of the Arctic National Wildlife Refuge (ANWR), Alaska. Spectral gamma-ray (SGR) data was collected in situ across the Jago River section. A total of 250 samples consisting of predominantly...
Carbon Isotopes, Total Organic Carbon, Programmed Pyrolysis, Volcanic Zircon U-Pb, and Geochemistry Data from the Hue Shale, Arctic Alaska - 2024 Carbon Isotopes, Total Organic Carbon, Programmed Pyrolysis, Volcanic Zircon U-Pb, and Geochemistry Data from the Hue Shale, Arctic Alaska - 2024
This dataset contains results from a stratigraphic section of the Hue Shale located along the Jago River in the Arctic National Wildlife Refuge at 69.9099, -143.3947 (WGS84). Sample heights were measured with a tape measure in a continuous succession. Zircon grains from volcanic ashes were analyzed via laser ablation at either the University of California, Santa Barbara (UCSB) or the...
Geochemical Data from Selected Triassic Rock Samples in Northeastern Alaska Geochemical Data from Selected Triassic Rock Samples in Northeastern Alaska
This set of data files contains analyses of samples representing Triassic units (Shublik and Ivishak Formations and Karen Creek Sandstone) in Alaska. The samples were collected from 20 outcrop localities in northeastern Alaska. The data set includes total organic carbon (TOC) and geochemical data from inductively coupled plasma-optical emission spectroscopy-mass spectroscopy (ICP-OES-MS)...
U-Pb Isotopic Data and Ages of Detrital Zircon from Selected Rocks from northern Yukon, Canada U-Pb Isotopic Data and Ages of Detrital Zircon from Selected Rocks from northern Yukon, Canada
This data set contains U-Pb isotopic data and associated ages of detrital zircon from sedimentary and metasedimentary rocks collected in northern Yukon, Canada. The samples were originally collected as part of geological mapping and research conducted by the Geological Survey of Canada. They were recovered from archived collections and sent to the U.S. Geological Survey for analysis of...
Whole Rock Major and Trace Element Chemistry for Igneous Rocks from Tyonek, Lime Hills, Talkeetna, McGrath, and Lake Clark Quadrangles, Western Alaska Range, Alaska Whole Rock Major and Trace Element Chemistry for Igneous Rocks from Tyonek, Lime Hills, Talkeetna, McGrath, and Lake Clark Quadrangles, Western Alaska Range, Alaska
This data release contains whole rock major and trace element data for 69 igneous rock samples collected from the Western Alaska Range between 2011 and 2012. The Series field relates to chronological units discussed in Jones et al. (2021). Descriptions are from original collector notebooks and are provided here for informational purposes.
Geochemical, Geochronologic, Rock-Eval, and Spectral Gamma Ray Data for Selected Triassic Rocks in Northwestern Alaska Geochemical, Geochronologic, Rock-Eval, and Spectral Gamma Ray Data for Selected Triassic Rocks in Northwestern Alaska
This dataset contains analyses of samples representing the Triassic Shublik and Otuk Formations in Alaska. The samples were collected from the Brontosaurus 1 well and measured stratigraphic sections at Surprise Creek and Cape Lisburne. The dataset includes total organic carbon (TOC), Rock-Eval (Tmax) data, geochemical data from inductively coupled plasma-optical emission spectroscopy...
Location Data for Petrographic Samples and Isotopic and Age Data from Detrital Zircon Grains from Selected Rock Samples from St. Lawrence Island and the Western Brooks Range, Alaska Location Data for Petrographic Samples and Isotopic and Age Data from Detrital Zircon Grains from Selected Rock Samples from St. Lawrence Island and the Western Brooks Range, Alaska
This dataset contains a list of geologic station localities on St. Lawrence Island, Alaska, from which thin section samples were examined. The dataset also contains U-Pb isotopic data and ages of detrital zircon (DZ) from sedimentary rocks collected on St. Lawrence Island and in the western Brooks Range. All St. Lawrence Island samples (DZ and thin sections) were collected by U.S...
Subsurface stratigraphic picks of the Middle-Upper Triassic Shublik Formation, Alaska North Slope Subsurface stratigraphic picks of the Middle-Upper Triassic Shublik Formation, Alaska North Slope
The Middle-Upper Triassic Shublik Formation is the main source rock for Arctic Alaska oil and gas accumulations, including the supergiant Prudhoe Bay field. A revised stratigraphic framework recently has been developed in outcrop for the Shublik and related strata that delineates three large-scale stratigraphic units: 1) the lower clastic (LC) unit, 2) the middle carbonate-chert (MCC)...
U-Pb Isotopic Data and Ages of Detrital Zircon Grains, Whole Rock Major and Trace-element Geochemistry, and Whole Rock Isotopic Data from Selected Rocks from the Western Alaska Range, Medfra area, and Livengood area, Alaska U-Pb Isotopic Data and Ages of Detrital Zircon Grains, Whole Rock Major and Trace-element Geochemistry, and Whole Rock Isotopic Data from Selected Rocks from the Western Alaska Range, Medfra area, and Livengood area, Alaska
This data release contains 3 datasets, U-Pb isotopic data and associated ages of detrital zircon grains for 27 sedimentary rocks, whole rock major and trace-element geochemistry for 15 igneous or phosphatic rock samples, and whole rock Sr, Nd, and Pb isotopic data for 6 igneous rock samples. The samples were collected from multiple localities across Alaska as part of geological mapping...
U-Pb Isotopic Data and Ages of Detrital Zircon Grains and Graptolite Fossil Data from Selected Rocks from the Western Alaska Range, Livengood area, and Seward Peninsula, Alaska U-Pb Isotopic Data and Ages of Detrital Zircon Grains and Graptolite Fossil Data from Selected Rocks from the Western Alaska Range, Livengood area, and Seward Peninsula, Alaska
This data set contains two data sets. One data set is of U-Pb isotopic data and associated ages of detrital zircon grains from 16 sedimentary and metasedimentary rocks from the western Alaska Range, Livengood area and Seward Peninsula, Alaska. Two samples were collected from the York Mountains area of the Seward Peninsula of western Alaska. Three samples were collected from the Livengood...
Appendices for Transgressive-Regressive Cycles in the Metalliferous, Oil Shale-Bearing Heath Formation (Upper Mississippian), Central Montana Appendices for Transgressive-Regressive Cycles in the Metalliferous, Oil Shale-Bearing Heath Formation (Upper Mississippian), Central Montana
This data release is teh set of appendices for Dumoulin et al. 2018 https://doi.org/10.29041/strat.14.1-4.97-122 ("Transgressive-regressive cycles in the metalliferous, oil shale-bearing Heath Formation (Upper Mississippian), central Montana"). The dataset consists of 8 appendices, including a histogram of solid bitumen and vitrinite Ro values, gas chromatograms, isotopic data, organic...
Bedrock geologic map of the Seward Peninsula, Alaska, and accompanying conodont data Bedrock geologic map of the Seward Peninsula, Alaska, and accompanying conodont data
This 1:500,000-scale geologic map depicts the bedrock geology of Seward Peninsula, western Alaska, on the North American side of the Bering Strait. The map encompasses all of the Teller, Nome, Solomon, and Bendeleben 1:250,000-scale quadrangles, and parts of the Shishmaref, Kotzebue, Candle, and Norton Bay 1:250,000-scale quadrangles (sh. 1; sh. 2). The geologic map is presented on Sheet...
Geologic and Fossil Locality Maps of the West-Central Part of the Howard Pass Quadrangle and Part of the Adjacent Misheguk Mountain Quadrangle, Western Brooks Range, Alaska Geologic and Fossil Locality Maps of the West-Central Part of the Howard Pass Quadrangle and Part of the Adjacent Misheguk Mountain Quadrangle, Western Brooks Range, Alaska
The map depicts the field distribution and contact relations between stratigraphic units, the tectonic relations between major stratigraphic sequences, and the detailed internal structure of these sequences. The stratigraphic sequences formed in a variety of continental margin depositional environments, and subsequently underwent a complexde formational history of imbricate thrust...
Filter Total Items: 95
Chemostratigraphy of the Cretaceous Hue Shale in Arctic Alaska: Exploring paleoceanographic controls on trace element enrichment, organic matter accumulation, and source-rock evolution Chemostratigraphy of the Cretaceous Hue Shale in Arctic Alaska: Exploring paleoceanographic controls on trace element enrichment, organic matter accumulation, and source-rock evolution
We document chemostratigraphy in an outcrop of late Albian to early Campanian (∼103–82 Ma) marine source rocks to better understand paleoenvironmental controls on trace element (TE) enrichment and organic matter accumulation in the distal Colville foreland basin of Arctic Alaska and how those drivers are linked to arc volcanism and successions of Cretaceous oceanographic and climatic...
Authors
Palma Botterell, Margaret Sanders, David Houseknecht, Richard Lease, William Rouse, Katherine Whidden, Julie Dumoulin, Rebecca Smith, Christina DeVera, Brett Valentine
Facies variation within outcrops of the Triassic Shublik Formation, northeastern Alaska Facies variation within outcrops of the Triassic Shublik Formation, northeastern Alaska
The Shublik Formation (Middle to Upper Triassic) is a heterogeneous unit that is a major hydrocarbon source rock in northern Alaska and the largest known Triassic phosphate accumulation in the world. This formation, which occurs in the subsurface and crops out within the Arctic Alaska basin, was deposited on a gently sloping ramp along the northwestern Laurentian margin. In this study...
Authors
Julie Dumoulin, Katherine Whidden, William Rouse, Christina DeVera
Arctic Alaska deepwater organic carbon burial and environmental changes during the late Albian–early Campanian (103–82 Ma) Arctic Alaska deepwater organic carbon burial and environmental changes during the late Albian–early Campanian (103–82 Ma)
The middle Cretaceous greenhouse period experienced profound environmental change including episodes of enhanced global burial of organic carbon marked by carbon isotopic excursions (CIEs). However, the role and response of polar regions like the newly formed, partially enclosed Arctic Ocean Basin during middle Cretaceous carbon burial remains enigmatic. We present the first Arctic...
Authors
Richard Lease, Katherine Whidden, Julie Dumoulin, David Houseknecht, Palma Botterell, Mark Dreier, Neil Griffis, Roland Mundil, Andrew Kylander-Clark, Margaret Sanders, John Counts, Jean Self-Trail, Jared Gooley, William Rouse, Rebecca Smith, Christina DeVera
Ordovician geology of Alaska Ordovician geology of Alaska
Ordovician rocks, found in northern, east-central, interior and southern Alaska, formed in a variety of depositional and palaeogeographic settings. Shallow- and deep-water strata deposited along the northwestern Laurentian margin occur in east-central Alaska (Yukon River area) and probably correlative rocks crop out to the north in the Porcupine River area. Ordovician strata elsewhere in...
Authors
Julie Dumoulin, Justin Strauss, John Repetski
Biosiliceous, organic-rich, and phosphatic facies of Triassic strata of northwest Alaska: Transect across a high-latitude, low-angle continental margin Biosiliceous, organic-rich, and phosphatic facies of Triassic strata of northwest Alaska: Transect across a high-latitude, low-angle continental margin
The Shublik Formation (Middle and Upper Triassic) is a mixed siliciclastic-carbonate-phosphatic unit in northern Alaska. It generated oil found in Prudhoe Bay and other accumulations and is a prospective self-sourced resource play on Alaska’s North Slope. Its distal, deeper-water equivalent—the Otuk Formation—consists largely of radiolarian chert, mudstone, and limestone and contains...
Authors
Julie Dumoulin, Katherine Whidden, William Rouse, Richard Lease, Adam Boehlke, Paul O’Sullivan
Detrital zircon ages from upper Paleozoic–Triassic clastic strata on St. Lawrence Island, Alaska: An enigmatic component of the Arctic Alaska–Chukotka microplate Detrital zircon ages from upper Paleozoic–Triassic clastic strata on St. Lawrence Island, Alaska: An enigmatic component of the Arctic Alaska–Chukotka microplate
New lithologic and detrital zircon (DZ) U-Pb data from Devonian–Triassic strata on St. Lawrence Island in the Bering Sea and from the western Brooks Range of Alaska suggest affinities between these two areas. The Brooks Range constitutes part of the Arctic Alaska–Chukotka microplate, but the tectonic and paleogeographic affinities of St. Lawrence Island are unknown or at best speculative...
Authors
Jeffrey Amato, Julie Dumoulin, Eric Gottlieb, Thomas Moore
Diagenetic barite-pyrite-wurtzite formation and redox signatures in Triassic mudstone, Brooks Range, northern Alaska Diagenetic barite-pyrite-wurtzite formation and redox signatures in Triassic mudstone, Brooks Range, northern Alaska
Mineralogical and geochemical studies of interbedded black and gray mudstones in the Triassic part of the Triassic-Jurassic Otuk Formation (northern Alaska) document locally abundant barite and pyrite plus diverse redox signatures. These strata, deposited in an outer shelf setting at paleolatitudes of ~45 to 60°N, show widespread sedimentological evidence for bioturbation. Barite occurs...
Authors
John Slack, Ryan McAleer, Wayne (Pat) Shanks, Julie Dumoulin
The Sedimentary Geochemistry and Paleoenvironments Project The Sedimentary Geochemistry and Paleoenvironments Project
Geobiology explores how Earth's system has changed over the course of geologic history and how living organisms on this planet are impacted by or are indeed causing these changes. For decades, geologists, paleontologists, and geochemists have generated data to investigate these topics. Foundational efforts in sedimentary geochemistry utilized spreadsheets for data storage and analysis...
Authors
Una Farrell, Rifaat Samawi, Savitha Anjanappa, Roman Klykov, Oyeleye Adeboye, Heda Agic, Anne-Sofie Ahm, Thomas Boag, Fred Bowyer, Jochen Brocks, Tessa Brunoir, Donald Canfield, Xiaoyan Chen, Meng Cheng, Matthew Clarkson, Devon Cole, David Cordie, Peter Crockford, Huan Cui, Tais Dahl, Lucas Del Mouro, Keith Dewing, Stephen Dornbos, Nadja Drabon, Julie Dumoulin, Jospeh Emmings, Cecilia Endringa, Tiffani Fraser, Robert Gaines, Richard Gaschnig, Timothy Gibson, Geoffrey Gilleaudeau, Benjamin Gill, Karin Goldberg, Romain Guilbaud, Galen Halverson, Emma Hammarlund, Kalev Hantsoo, Miles Henderson, Malcolm Hodgskiss, Tristan Horner, Jon Husson, Benjamin Johnson, Pavel Kabanov, C. Keller, Julien Kimmig, Michael Kipp, Andrew Knoll, Timmu Kreitsmann, Marcus Kunzmann, Florian Kurzweil, Matthew LeRoy, Chao Li, Alex Lipp, David Loydell, Xinze Lu, Francis Macdonald, Joseph Magnall, Kaarel Mand, Akshay Mehra, Michael Melchin, Austin Miller, Chiza Mwinde, Brennan O’Connell, Lawrence Och, Frantz Ossa Ossa, Anais Pages, Kart Paiste, Camille Partin, Shanan Peters, Peter Petrov, Tiffany Playter, Stephanie Plaza-Torres, Susannah Porter, Simon Poulton, Sara Pruss, Sylvain Richoz, Samantha Ritzer, Alan Rooney, Swapan Sahoo, Shane Schoepfer, Judith Sclafani, Yanan Shen, Oliver Shorttle, Sarah Slotznick, Emily Smith, Sam Spinks, Richard Stockey, J. Strauss, Eva Stueken, Sabrina Tecklenburg, Danielle Thomson, N. Tosca, Gabriel Uhlein, Maoli Vizcaino, Huajian Wang, Tristan White, Philip Wilby, Christina Woltz, Rachel A. Wood, Lei Xiang, Inessa Yurchenko, Tianran Zhang, Noah Planavsky, Kimberly Lau, David Johnston, Erik Sperling
Assessment of undiscovered gas resources in Upper Devonian to Lower Cretaceous strata of the western North Slope, Alaska, 2021 Assessment of undiscovered gas resources in Upper Devonian to Lower Cretaceous strata of the western North Slope, Alaska, 2021
Using a geology-based assessment methodology, the U.S. Geological Survey estimated a mean of 1,407 billion (1.4 trillion) cubic feet of gas in conventional accumulations in Upper Devonian to Lower Cretaceous strata of the western North Slope, Alaska.
Authors
David Houseknecht, Tracey Mercier, Christopher Schenk, Thomas Moore, William Rouse, Julie Dumoulin, William Craddock, Richard Lease, Palma Botterell, Margaret Sanders, Rebecca Smith, Christopher Connors, Christopher Garrity, Katherine Whidden, Jared Gooley, John Counts, Joshua Long, Christina DeVera
Surface to subsurface correlation of the Middle-Upper Triassic Shublik Formation within a revised sequence stratigraphic framework Surface to subsurface correlation of the Middle-Upper Triassic Shublik Formation within a revised sequence stratigraphic framework
Recent work on cores and outcrops of the Middle-Upper Triassic Shublik Formation has facilitated surface to subsurface correlation of depositional sequences across the Alaska North Slope. Five transgressive-regressive depositional sequences have been defined within three large-scale stratigraphic units. Outcrop spectral gamma-ray (GR) profiles were used to correlate observed stacking...
Authors
William Rouse, Katherine Whidden, Julie Dumoulin, David Houseknecht
Assessment of undiscovered oil and gas resources in the Central North Slope of Alaska, 2020 Assessment of undiscovered oil and gas resources in the Central North Slope of Alaska, 2020
Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 3.6 billion barrels of oil and 8.9 trillion cubic feet of natural gas (associated and nonassociated) in conventional accumulations in Mississippian through Paleogene strata in the central North Slope of Alaska.
Authors
David Houseknecht, Katherine Whidden, Christopher Connors, Richard Lease, Christopher Schenk, Tracey Mercier, William Rouse, Palma J. Botterell, Rebecca Smith, Margaret M. Sanders, William Craddock, Christina DeVera, Christopher Garrity, Marc Buursink, C. Karacan, Samuel Heller, Thomas Moore, Julie Dumoulin, Marilyn Tennyson, Katherine French, Cheryl Woodall, Ronald Drake, Kristen Marra, Thomas Finn, Scott Kinney, Chilisa Shorten
Element cycling in the Middle-Late Triassic Shublik Formation: Mineralization vs. recycling of biolimiting nutrients in an unconventional resource play Element cycling in the Middle-Late Triassic Shublik Formation: Mineralization vs. recycling of biolimiting nutrients in an unconventional resource play
The Triassic Shublik Formation in northern Alaska is one of the major source rocks in North America, having generated much of the petroleum in Prudhoe Bay and associated fields. The middle Shublik Formation, the focus of this study, is a highly phosphatic, organic-rich carbonate mudstone interval. Apatite cements can occur as phosphatic peloids, steinkerns, elongate or angular nodules...
Authors
Katherine Whidden, Julie Dumoulin, James Macquaker, Justin Birdwell, Adam Boehlke, Katherine French
Science and Products
Zircon U-Pb, Organic Carbon Isotope, and Geochemistry Data from the Hue Shale and Canning Formation, Arctic Alaska, 2025 Zircon U-Pb, Organic Carbon Isotope, and Geochemistry Data from the Hue Shale and Canning Formation, Arctic Alaska, 2025
This dataset contains results from three stratigraphic sections of the Hue Shale located in and adjacent to the Arctic National Wildlife Refuge in northeastern Alaska. Sample heights were measured with a tape measure in continuous successions. Zircon grains from volcanic ashes were analyzed via laser ablation at the University of California, Santa Barbara (UCSB) using a Photon Machines...
Total organic carbon, programmed temperature pyrolysis, vitrinite reflectance, organic carbon isotopes, elemental, and spectral gamma-ray data from the Cretaceous Hue Shale (Jago River outcrop), Arctic Alaska, USA Total organic carbon, programmed temperature pyrolysis, vitrinite reflectance, organic carbon isotopes, elemental, and spectral gamma-ray data from the Cretaceous Hue Shale (Jago River outcrop), Arctic Alaska, USA
Chemostratigraphic signatures were recorded in a 113 m thick outcrop of late Albian to early Campanian (~103–82 Ma) Hue Shale exposed on the bank of the Jago River in the coastal plain (“1002 Area”) of the Arctic National Wildlife Refuge (ANWR), Alaska. Spectral gamma-ray (SGR) data was collected in situ across the Jago River section. A total of 250 samples consisting of predominantly...
Carbon Isotopes, Total Organic Carbon, Programmed Pyrolysis, Volcanic Zircon U-Pb, and Geochemistry Data from the Hue Shale, Arctic Alaska - 2024 Carbon Isotopes, Total Organic Carbon, Programmed Pyrolysis, Volcanic Zircon U-Pb, and Geochemistry Data from the Hue Shale, Arctic Alaska - 2024
This dataset contains results from a stratigraphic section of the Hue Shale located along the Jago River in the Arctic National Wildlife Refuge at 69.9099, -143.3947 (WGS84). Sample heights were measured with a tape measure in a continuous succession. Zircon grains from volcanic ashes were analyzed via laser ablation at either the University of California, Santa Barbara (UCSB) or the...
Geochemical Data from Selected Triassic Rock Samples in Northeastern Alaska Geochemical Data from Selected Triassic Rock Samples in Northeastern Alaska
This set of data files contains analyses of samples representing Triassic units (Shublik and Ivishak Formations and Karen Creek Sandstone) in Alaska. The samples were collected from 20 outcrop localities in northeastern Alaska. The data set includes total organic carbon (TOC) and geochemical data from inductively coupled plasma-optical emission spectroscopy-mass spectroscopy (ICP-OES-MS)...
U-Pb Isotopic Data and Ages of Detrital Zircon from Selected Rocks from northern Yukon, Canada U-Pb Isotopic Data and Ages of Detrital Zircon from Selected Rocks from northern Yukon, Canada
This data set contains U-Pb isotopic data and associated ages of detrital zircon from sedimentary and metasedimentary rocks collected in northern Yukon, Canada. The samples were originally collected as part of geological mapping and research conducted by the Geological Survey of Canada. They were recovered from archived collections and sent to the U.S. Geological Survey for analysis of...
Whole Rock Major and Trace Element Chemistry for Igneous Rocks from Tyonek, Lime Hills, Talkeetna, McGrath, and Lake Clark Quadrangles, Western Alaska Range, Alaska Whole Rock Major and Trace Element Chemistry for Igneous Rocks from Tyonek, Lime Hills, Talkeetna, McGrath, and Lake Clark Quadrangles, Western Alaska Range, Alaska
This data release contains whole rock major and trace element data for 69 igneous rock samples collected from the Western Alaska Range between 2011 and 2012. The Series field relates to chronological units discussed in Jones et al. (2021). Descriptions are from original collector notebooks and are provided here for informational purposes.
Geochemical, Geochronologic, Rock-Eval, and Spectral Gamma Ray Data for Selected Triassic Rocks in Northwestern Alaska Geochemical, Geochronologic, Rock-Eval, and Spectral Gamma Ray Data for Selected Triassic Rocks in Northwestern Alaska
This dataset contains analyses of samples representing the Triassic Shublik and Otuk Formations in Alaska. The samples were collected from the Brontosaurus 1 well and measured stratigraphic sections at Surprise Creek and Cape Lisburne. The dataset includes total organic carbon (TOC), Rock-Eval (Tmax) data, geochemical data from inductively coupled plasma-optical emission spectroscopy...
Location Data for Petrographic Samples and Isotopic and Age Data from Detrital Zircon Grains from Selected Rock Samples from St. Lawrence Island and the Western Brooks Range, Alaska Location Data for Petrographic Samples and Isotopic and Age Data from Detrital Zircon Grains from Selected Rock Samples from St. Lawrence Island and the Western Brooks Range, Alaska
This dataset contains a list of geologic station localities on St. Lawrence Island, Alaska, from which thin section samples were examined. The dataset also contains U-Pb isotopic data and ages of detrital zircon (DZ) from sedimentary rocks collected on St. Lawrence Island and in the western Brooks Range. All St. Lawrence Island samples (DZ and thin sections) were collected by U.S...
Subsurface stratigraphic picks of the Middle-Upper Triassic Shublik Formation, Alaska North Slope Subsurface stratigraphic picks of the Middle-Upper Triassic Shublik Formation, Alaska North Slope
The Middle-Upper Triassic Shublik Formation is the main source rock for Arctic Alaska oil and gas accumulations, including the supergiant Prudhoe Bay field. A revised stratigraphic framework recently has been developed in outcrop for the Shublik and related strata that delineates three large-scale stratigraphic units: 1) the lower clastic (LC) unit, 2) the middle carbonate-chert (MCC)...
U-Pb Isotopic Data and Ages of Detrital Zircon Grains, Whole Rock Major and Trace-element Geochemistry, and Whole Rock Isotopic Data from Selected Rocks from the Western Alaska Range, Medfra area, and Livengood area, Alaska U-Pb Isotopic Data and Ages of Detrital Zircon Grains, Whole Rock Major and Trace-element Geochemistry, and Whole Rock Isotopic Data from Selected Rocks from the Western Alaska Range, Medfra area, and Livengood area, Alaska
This data release contains 3 datasets, U-Pb isotopic data and associated ages of detrital zircon grains for 27 sedimentary rocks, whole rock major and trace-element geochemistry for 15 igneous or phosphatic rock samples, and whole rock Sr, Nd, and Pb isotopic data for 6 igneous rock samples. The samples were collected from multiple localities across Alaska as part of geological mapping...
U-Pb Isotopic Data and Ages of Detrital Zircon Grains and Graptolite Fossil Data from Selected Rocks from the Western Alaska Range, Livengood area, and Seward Peninsula, Alaska U-Pb Isotopic Data and Ages of Detrital Zircon Grains and Graptolite Fossil Data from Selected Rocks from the Western Alaska Range, Livengood area, and Seward Peninsula, Alaska
This data set contains two data sets. One data set is of U-Pb isotopic data and associated ages of detrital zircon grains from 16 sedimentary and metasedimentary rocks from the western Alaska Range, Livengood area and Seward Peninsula, Alaska. Two samples were collected from the York Mountains area of the Seward Peninsula of western Alaska. Three samples were collected from the Livengood...
Appendices for Transgressive-Regressive Cycles in the Metalliferous, Oil Shale-Bearing Heath Formation (Upper Mississippian), Central Montana Appendices for Transgressive-Regressive Cycles in the Metalliferous, Oil Shale-Bearing Heath Formation (Upper Mississippian), Central Montana
This data release is teh set of appendices for Dumoulin et al. 2018 https://doi.org/10.29041/strat.14.1-4.97-122 ("Transgressive-regressive cycles in the metalliferous, oil shale-bearing Heath Formation (Upper Mississippian), central Montana"). The dataset consists of 8 appendices, including a histogram of solid bitumen and vitrinite Ro values, gas chromatograms, isotopic data, organic...
Bedrock geologic map of the Seward Peninsula, Alaska, and accompanying conodont data Bedrock geologic map of the Seward Peninsula, Alaska, and accompanying conodont data
This 1:500,000-scale geologic map depicts the bedrock geology of Seward Peninsula, western Alaska, on the North American side of the Bering Strait. The map encompasses all of the Teller, Nome, Solomon, and Bendeleben 1:250,000-scale quadrangles, and parts of the Shishmaref, Kotzebue, Candle, and Norton Bay 1:250,000-scale quadrangles (sh. 1; sh. 2). The geologic map is presented on Sheet...
Geologic and Fossil Locality Maps of the West-Central Part of the Howard Pass Quadrangle and Part of the Adjacent Misheguk Mountain Quadrangle, Western Brooks Range, Alaska Geologic and Fossil Locality Maps of the West-Central Part of the Howard Pass Quadrangle and Part of the Adjacent Misheguk Mountain Quadrangle, Western Brooks Range, Alaska
The map depicts the field distribution and contact relations between stratigraphic units, the tectonic relations between major stratigraphic sequences, and the detailed internal structure of these sequences. The stratigraphic sequences formed in a variety of continental margin depositional environments, and subsequently underwent a complexde formational history of imbricate thrust...
Filter Total Items: 95
Chemostratigraphy of the Cretaceous Hue Shale in Arctic Alaska: Exploring paleoceanographic controls on trace element enrichment, organic matter accumulation, and source-rock evolution Chemostratigraphy of the Cretaceous Hue Shale in Arctic Alaska: Exploring paleoceanographic controls on trace element enrichment, organic matter accumulation, and source-rock evolution
We document chemostratigraphy in an outcrop of late Albian to early Campanian (∼103–82 Ma) marine source rocks to better understand paleoenvironmental controls on trace element (TE) enrichment and organic matter accumulation in the distal Colville foreland basin of Arctic Alaska and how those drivers are linked to arc volcanism and successions of Cretaceous oceanographic and climatic...
Authors
Palma Botterell, Margaret Sanders, David Houseknecht, Richard Lease, William Rouse, Katherine Whidden, Julie Dumoulin, Rebecca Smith, Christina DeVera, Brett Valentine
Facies variation within outcrops of the Triassic Shublik Formation, northeastern Alaska Facies variation within outcrops of the Triassic Shublik Formation, northeastern Alaska
The Shublik Formation (Middle to Upper Triassic) is a heterogeneous unit that is a major hydrocarbon source rock in northern Alaska and the largest known Triassic phosphate accumulation in the world. This formation, which occurs in the subsurface and crops out within the Arctic Alaska basin, was deposited on a gently sloping ramp along the northwestern Laurentian margin. In this study...
Authors
Julie Dumoulin, Katherine Whidden, William Rouse, Christina DeVera
Arctic Alaska deepwater organic carbon burial and environmental changes during the late Albian–early Campanian (103–82 Ma) Arctic Alaska deepwater organic carbon burial and environmental changes during the late Albian–early Campanian (103–82 Ma)
The middle Cretaceous greenhouse period experienced profound environmental change including episodes of enhanced global burial of organic carbon marked by carbon isotopic excursions (CIEs). However, the role and response of polar regions like the newly formed, partially enclosed Arctic Ocean Basin during middle Cretaceous carbon burial remains enigmatic. We present the first Arctic...
Authors
Richard Lease, Katherine Whidden, Julie Dumoulin, David Houseknecht, Palma Botterell, Mark Dreier, Neil Griffis, Roland Mundil, Andrew Kylander-Clark, Margaret Sanders, John Counts, Jean Self-Trail, Jared Gooley, William Rouse, Rebecca Smith, Christina DeVera
Ordovician geology of Alaska Ordovician geology of Alaska
Ordovician rocks, found in northern, east-central, interior and southern Alaska, formed in a variety of depositional and palaeogeographic settings. Shallow- and deep-water strata deposited along the northwestern Laurentian margin occur in east-central Alaska (Yukon River area) and probably correlative rocks crop out to the north in the Porcupine River area. Ordovician strata elsewhere in...
Authors
Julie Dumoulin, Justin Strauss, John Repetski
Biosiliceous, organic-rich, and phosphatic facies of Triassic strata of northwest Alaska: Transect across a high-latitude, low-angle continental margin Biosiliceous, organic-rich, and phosphatic facies of Triassic strata of northwest Alaska: Transect across a high-latitude, low-angle continental margin
The Shublik Formation (Middle and Upper Triassic) is a mixed siliciclastic-carbonate-phosphatic unit in northern Alaska. It generated oil found in Prudhoe Bay and other accumulations and is a prospective self-sourced resource play on Alaska’s North Slope. Its distal, deeper-water equivalent—the Otuk Formation—consists largely of radiolarian chert, mudstone, and limestone and contains...
Authors
Julie Dumoulin, Katherine Whidden, William Rouse, Richard Lease, Adam Boehlke, Paul O’Sullivan
Detrital zircon ages from upper Paleozoic–Triassic clastic strata on St. Lawrence Island, Alaska: An enigmatic component of the Arctic Alaska–Chukotka microplate Detrital zircon ages from upper Paleozoic–Triassic clastic strata on St. Lawrence Island, Alaska: An enigmatic component of the Arctic Alaska–Chukotka microplate
New lithologic and detrital zircon (DZ) U-Pb data from Devonian–Triassic strata on St. Lawrence Island in the Bering Sea and from the western Brooks Range of Alaska suggest affinities between these two areas. The Brooks Range constitutes part of the Arctic Alaska–Chukotka microplate, but the tectonic and paleogeographic affinities of St. Lawrence Island are unknown or at best speculative...
Authors
Jeffrey Amato, Julie Dumoulin, Eric Gottlieb, Thomas Moore
Diagenetic barite-pyrite-wurtzite formation and redox signatures in Triassic mudstone, Brooks Range, northern Alaska Diagenetic barite-pyrite-wurtzite formation and redox signatures in Triassic mudstone, Brooks Range, northern Alaska
Mineralogical and geochemical studies of interbedded black and gray mudstones in the Triassic part of the Triassic-Jurassic Otuk Formation (northern Alaska) document locally abundant barite and pyrite plus diverse redox signatures. These strata, deposited in an outer shelf setting at paleolatitudes of ~45 to 60°N, show widespread sedimentological evidence for bioturbation. Barite occurs...
Authors
John Slack, Ryan McAleer, Wayne (Pat) Shanks, Julie Dumoulin
The Sedimentary Geochemistry and Paleoenvironments Project The Sedimentary Geochemistry and Paleoenvironments Project
Geobiology explores how Earth's system has changed over the course of geologic history and how living organisms on this planet are impacted by or are indeed causing these changes. For decades, geologists, paleontologists, and geochemists have generated data to investigate these topics. Foundational efforts in sedimentary geochemistry utilized spreadsheets for data storage and analysis...
Authors
Una Farrell, Rifaat Samawi, Savitha Anjanappa, Roman Klykov, Oyeleye Adeboye, Heda Agic, Anne-Sofie Ahm, Thomas Boag, Fred Bowyer, Jochen Brocks, Tessa Brunoir, Donald Canfield, Xiaoyan Chen, Meng Cheng, Matthew Clarkson, Devon Cole, David Cordie, Peter Crockford, Huan Cui, Tais Dahl, Lucas Del Mouro, Keith Dewing, Stephen Dornbos, Nadja Drabon, Julie Dumoulin, Jospeh Emmings, Cecilia Endringa, Tiffani Fraser, Robert Gaines, Richard Gaschnig, Timothy Gibson, Geoffrey Gilleaudeau, Benjamin Gill, Karin Goldberg, Romain Guilbaud, Galen Halverson, Emma Hammarlund, Kalev Hantsoo, Miles Henderson, Malcolm Hodgskiss, Tristan Horner, Jon Husson, Benjamin Johnson, Pavel Kabanov, C. Keller, Julien Kimmig, Michael Kipp, Andrew Knoll, Timmu Kreitsmann, Marcus Kunzmann, Florian Kurzweil, Matthew LeRoy, Chao Li, Alex Lipp, David Loydell, Xinze Lu, Francis Macdonald, Joseph Magnall, Kaarel Mand, Akshay Mehra, Michael Melchin, Austin Miller, Chiza Mwinde, Brennan O’Connell, Lawrence Och, Frantz Ossa Ossa, Anais Pages, Kart Paiste, Camille Partin, Shanan Peters, Peter Petrov, Tiffany Playter, Stephanie Plaza-Torres, Susannah Porter, Simon Poulton, Sara Pruss, Sylvain Richoz, Samantha Ritzer, Alan Rooney, Swapan Sahoo, Shane Schoepfer, Judith Sclafani, Yanan Shen, Oliver Shorttle, Sarah Slotznick, Emily Smith, Sam Spinks, Richard Stockey, J. Strauss, Eva Stueken, Sabrina Tecklenburg, Danielle Thomson, N. Tosca, Gabriel Uhlein, Maoli Vizcaino, Huajian Wang, Tristan White, Philip Wilby, Christina Woltz, Rachel A. Wood, Lei Xiang, Inessa Yurchenko, Tianran Zhang, Noah Planavsky, Kimberly Lau, David Johnston, Erik Sperling
Assessment of undiscovered gas resources in Upper Devonian to Lower Cretaceous strata of the western North Slope, Alaska, 2021 Assessment of undiscovered gas resources in Upper Devonian to Lower Cretaceous strata of the western North Slope, Alaska, 2021
Using a geology-based assessment methodology, the U.S. Geological Survey estimated a mean of 1,407 billion (1.4 trillion) cubic feet of gas in conventional accumulations in Upper Devonian to Lower Cretaceous strata of the western North Slope, Alaska.
Authors
David Houseknecht, Tracey Mercier, Christopher Schenk, Thomas Moore, William Rouse, Julie Dumoulin, William Craddock, Richard Lease, Palma Botterell, Margaret Sanders, Rebecca Smith, Christopher Connors, Christopher Garrity, Katherine Whidden, Jared Gooley, John Counts, Joshua Long, Christina DeVera
Surface to subsurface correlation of the Middle-Upper Triassic Shublik Formation within a revised sequence stratigraphic framework Surface to subsurface correlation of the Middle-Upper Triassic Shublik Formation within a revised sequence stratigraphic framework
Recent work on cores and outcrops of the Middle-Upper Triassic Shublik Formation has facilitated surface to subsurface correlation of depositional sequences across the Alaska North Slope. Five transgressive-regressive depositional sequences have been defined within three large-scale stratigraphic units. Outcrop spectral gamma-ray (GR) profiles were used to correlate observed stacking...
Authors
William Rouse, Katherine Whidden, Julie Dumoulin, David Houseknecht
Assessment of undiscovered oil and gas resources in the Central North Slope of Alaska, 2020 Assessment of undiscovered oil and gas resources in the Central North Slope of Alaska, 2020
Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 3.6 billion barrels of oil and 8.9 trillion cubic feet of natural gas (associated and nonassociated) in conventional accumulations in Mississippian through Paleogene strata in the central North Slope of Alaska.
Authors
David Houseknecht, Katherine Whidden, Christopher Connors, Richard Lease, Christopher Schenk, Tracey Mercier, William Rouse, Palma J. Botterell, Rebecca Smith, Margaret M. Sanders, William Craddock, Christina DeVera, Christopher Garrity, Marc Buursink, C. Karacan, Samuel Heller, Thomas Moore, Julie Dumoulin, Marilyn Tennyson, Katherine French, Cheryl Woodall, Ronald Drake, Kristen Marra, Thomas Finn, Scott Kinney, Chilisa Shorten
Element cycling in the Middle-Late Triassic Shublik Formation: Mineralization vs. recycling of biolimiting nutrients in an unconventional resource play Element cycling in the Middle-Late Triassic Shublik Formation: Mineralization vs. recycling of biolimiting nutrients in an unconventional resource play
The Triassic Shublik Formation in northern Alaska is one of the major source rocks in North America, having generated much of the petroleum in Prudhoe Bay and associated fields. The middle Shublik Formation, the focus of this study, is a highly phosphatic, organic-rich carbonate mudstone interval. Apatite cements can occur as phosphatic peloids, steinkerns, elongate or angular nodules...
Authors
Katherine Whidden, Julie Dumoulin, James Macquaker, Justin Birdwell, Adam Boehlke, Katherine French
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government