Qualitative assessment of composition and reservoir quality of Albian-Cenomanian Nanushuk Formation sandstones, measured outcrop sections, central North Slope, Alaska

Raw Data File 2021-13, Qualitative assessment of composition and reservoir quality of Albian-Cenomanian Nanushuk Formation sandstones, measured outcrop sections, central North Slope, Alaska, presents a qualitative appraisal of thin sections collected from Nanushuk outcrops to ascertain their reservoir potential. The DGGS sample collection was searched for petrographic thin sections collected from stratigraphic sections of the Nanushuk Formation measured by David LePain working with various colleagues, including Russ Kirkham, Paul Decker, Dave Houseknecht, and Nina Harun over the past 22 years. The search yielded 264 thin sections of Nanushuk siltstone and sandstone. Three additional thin sections of the Seabee Formation mudstone, siltstone, and sandstone were collected from the upper portion of a measured section that straddles the Nanushuk - Seabee contact. These 267 samples were collected from 32 stations located in eight geographic areas on the North Slope, including Slope Mountain, May Creek, Arc Mountain, Rooftop Ridge, Big Bend of the Chandler River, Ninuluk Bluff on the Colville River, Killik Bend of the Colville River, and Horseshoe Bend of the Colville River. The thin sections were examined qualitatively to ascertain several petrographic properties, including grain size, detrital composition, cement and matrix content, the abundance of burrows and laminations, and porosity distribution. Sedimentary structures observed in the field were noted, as was the interpreted sedimentary facies association. The results are compiled in a spreadsheet along with information on geographic location, latitude, longitude, and measured petrophysical properties (porosity, permeability, and grain density) of the few samples where available. All files are available from the DGGS website: http://doi.org/10.14509/30746.

Data e Risorse

Campo	Valore
access_constraints	["Use Constraints: Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.", "Access Constraints: This report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below)."]
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contact-email	dggspubs@alaska.gov
coupled-resource	[]
dataset-reference-date	[{"type": "publication", "value": "2021-01-01"}]
frequency-of-update	notPlanned
licence	["The State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product."]
metadata-date	2022-01-05
metadata-language	eng; USA
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temporal-extent-begin	1999-01-01
temporal-extent-end	2021-01-01
Gruppi	AmeriGEOSS National Provider North America
Tag	albian amerigeo amerigeoss analyses awuna-river bedrock bedrock-geology big-bend brookian calcite cement cenomanian chert chlorite ckan clay colville-river correlation cretaceous dggs dolomite energy exploration feldspar fluvial geo geologic geoss glauconite hydrocarbon kaklik-naitka-creek kaolinite killik-bend mayuasanik-creek mica mineralogy mudstone nanushuk-formation nanushuk-river national ninuluk-bluff ninuluk-creek nonmarine north-america north-slope oil-and-gas oil-and-gas-basin oil-development oolamnagavik-river permeability petrographic petroleum petrology plagioclase porosity provenance quartz quartzite replacement reservoir resources rocks sand sandstone sediment sedimentary sedimentology shale shelf shoreface siderite silica siltstone slope slope-mountain sorting stratigraphy trouble-creek united-states
isopen	False
metadata_created	2025-11-21T21:08:17.704729
metadata_modified	2025-11-21T21:08:17.704735
notes	Raw Data File 2021-13, Qualitative assessment of composition and reservoir quality of Albian-Cenomanian Nanushuk Formation sandstones, measured outcrop sections, central North Slope, Alaska, presents a qualitative appraisal of thin sections collected from Nanushuk outcrops to ascertain their reservoir potential. The DGGS sample collection was searched for petrographic thin sections collected from stratigraphic sections of the Nanushuk Formation measured by David LePain working with various colleagues, including Russ Kirkham, Paul Decker, Dave Houseknecht, and Nina Harun over the past 22 years. The search yielded 264 thin sections of Nanushuk siltstone and sandstone. Three additional thin sections of the Seabee Formation mudstone, siltstone, and sandstone were collected from the upper portion of a measured section that straddles the Nanushuk - Seabee contact. These 267 samples were collected from 32 stations located in eight geographic areas on the North Slope, including Slope Mountain, May Creek, Arc Mountain, Rooftop Ridge, Big Bend of the Chandler River, Ninuluk Bluff on the Colville River, Killik Bend of the Colville River, and Horseshoe Bend of the Colville River. The thin sections were examined qualitatively to ascertain several petrographic properties, including grain size, detrital composition, cement and matrix content, the abundance of burrows and laminations, and porosity distribution. Sedimentary structures observed in the field were noted, as was the interpreted sedimentary facies association. The results are compiled in a spreadsheet along with information on geographic location, latitude, longitude, and measured petrophysical properties (porosity, permeability, and grain density) of the few samples where available. All files are available from the DGGS website: http://doi.org/10.14509/30746.
num_resources	12
num_tags	79
title	Qualitative assessment of composition and reservoir quality of Albian-Cenomanian Nanushuk Formation sandstones, measured outcrop sections, central North Slope, Alaska