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3 edition of Petrography of the Nanushuk Group and Torok Formation found in the catalog.

Petrography of the Nanushuk Group and Torok Formation

Petrography of the Nanushuk Group and Torok Formation

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Published by U.S. Dept. of the Interior, Geological Survey in [Menlo Park, Calif.?] .
Written in English

    Subjects:
  • Petrology -- Alaska

  • Edition Notes

    Statementby Susan Bartsch-Winkler and A. Curtis Huffman
    SeriesOpen-file report -- 81-1222, Open-file report (Geological Survey (U.S.)) -- 81-1222
    ContributionsHuffman, A. C, Geological Survey (U.S.)
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL13604849M

    Nanushuk Development Project Colby VanDenburg Geologic Manager Armstrong Energy, LLC Resource Development Council 38th Annual Alaska Resources Conference Novem 1. Willow Nanushuk Discovery • Recoverable resource > MMBO • , BOPD potential - ConocoPhillips Press Release. The Nanushuk Group is a geologic group in Alaska. It preserves fossils dating back to the Cretaceous period. See also List of fossiliferous stratigraphic units in Alaska This article about a specific stratigraphic formation in Alaska is a stub. You can help Wikipedia by expanding it. This article related to the Cretaceous period is a y: United States.

    The Nanushuk project is located near existing industry infrastructure, minimizing potential environmental impact. Thanks to continuing improvements in technology, practices, and oversight, the oil industry has demonstrated that North Slope energy development and environmental stewardship can and do coexist. It is named after the Nanushuk geologic formation that is Armstrong's primary target. Armstrong Energy operates the Pikka Unit for its partners Spanish major Repsol and Denver-based independent GMT Exploration Co. Armstrong increased its stake in the project to become majority owner and took over as operator of the project from Repsol in late

      The Nanushuk and the related Torok formation were created roughly million years ago as sediments from eroding mountains deposited across the Slope, when it was an oceanic basin.   88 Energy has encountered encouraging oil shows whilst drilling its potentially high impact Winx-1 exploration well in Alaska’s famed North Slope oil province. Data observed while drilling the Nanushuk formation in the Winx-1 well appears to be comparable with a nearby third party well targeting the same formation. The company also encountered oil shows in the deeper Torok : Matt Birney.


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Petrography of the Nanushuk Group and Torok Formation Download PDF EPUB FB2

Part or all of this report is presented in Portable Document Format (PDF). For best results viewing and printing PDF documents, it is recommended that you download the documents to your computer and open them with Adobe Reader.

Bartsch-Winkler, Susan, and Huffman, A.C.,Petrography of the Nanushuk Group and Torok Formation: U.S. Geological Survey Open-File Report62 p. Publication Products. Report Information. ofpdf ( M) Top of Page. Nanushuk strata grade downsection and northward to outer-shelf, slope, and basinal clastic rocks of the upper Torok Formation.

This is apparent on seismic lines where the Nanushuk is present as topset reflectors that grade northeastward and eastward to distal topset, foreset (slope clinoforms), and bottomset reflectors of the Torok Formation (Bird and Andrews, ).

The Nanushuk Formation is a thick fluvial-deltaic-shelf succession, whereas the Torok Formation is its basinward equivalent. These two formations are genetically related and composed of clastic rocks.

Nanushuk Formation • Lower Cretaceous (Albian – Cenomanian) • Shallow marine to nonmarine topsets with abundant reservoir-prone sandstone • Genetic equivalent of Torok Formation slope foresets and basinal facies • Nanushuk + Torok represent a major clinoformal succession that filled the western Colville foreland basin by.

Petrographic, X-ray diffraction, and scanning electron microscope investigations of Nanushuk Group and Torok/Topagoruk formation (Brookian) sandstones and siltstones from 9 wells in the National Petroleum Reserve in Alaska resulted in recognition of features of interest regarding the diagenetic development of these rocks.

It is named after the Nanushuk geologic formation that is Armstrong’s primary target. Armstrong Energy operates the Pikka Unit for its partners Spanish major Repsol and Denver-based independent GMT Exploration Co.

Armstrong increased its stake in the project to become majority owner and took over as operator of the project from Repsol in late. The Nanushuk Formation is part of a larger Torok-Nanushuk depositional sequence, separated from the Seabee-Tuluvak sequence by a major flooding surface (Decker, ).

The Torok and Seabee formations are distal shelf to slope and basin mudstones, whereas the Nanushuk and Tuluvak are fluvial, deltaic, and shallow-marine deposits (Mull et al Cited by: 1.

The metamorphic minerals occur in the Torok Formation and the Nanushuk Group; they are contained in sediments at least as old as middle Albian in age, and may have arrived earlier. The source of the minerals is the blueschist‐facies schist belt, the structurally highest, more internal of two structurally and metamorphically distinct belts Cited by: The USACE has received a permit application to place fill in wetlands to develop an oil lease on the North Slope of Alaska near the Colville River approximately miles from the community of Nuiqsut (at the southernmost location of the Nanushuk Project), within the North Slope Borough (NSB).

The base of Nanushuk is gradational and intertongues with the underlying recessive shales of Torok Formation; contact is mapped at the base of the stratigraphically lowest laterally persistent sandstone trace visible on aerial photographs.

The Torok Formation was originally named by Gryc and others () and revised by Patton () for a thick sequence of dominantly nonresistant, fine-grained sedimentary rocks that underlie the herein revised Nanushuk Formation. The Torok forms the base of the folded sedimentary sequence that constitutes most of the northern foothills belt.

Seismic Stratigraphy of Lower Cretaceous Foreland Basin Submarine Fans in the North Slope, Alaska Bartsch-Winkler, S., and Huffman, A.C., Petrography of the Nanushuk Group and Torok formations; U.S. Geol. Surv. Open-file report 81–, 62p. () Seismic Stratigraphy of Lower Cretaceous Foreland Basin Submarine Fans in the Cited by: 9.

DOCUMENTS Record of Decision (ROD) Final USACE Permit Application Final USACE Issued Permit ( ) Final EIS. Executive Summary. FEIS - Cover to Chapter 2.

FEIS - Chapter 3 to Chapter Appendices: Appendix I Permit Application; Appendix II Scoping and Public Meetings ; Appendix III Alternatives Development ; Appendix IV IÑUPIAQ AND.

Together, the Nanushuk and Torok Formations form a huge wedge of sediment deposited in a deep water basin. While the Torok Formation was deposited on the floor of the deep basin, the younger Nanushuk Formation was deposited in shallow water and includes potential reservoirs in deltaic, shoreface, and fluvial sandstones.

of the Nanushuk Group and Torok Formation show modal plots which reflect subtle variations corresponding to those of the surface plots, possibly indicating a gradation, transition, or interfingering of lithic types in the subsurface. Sources for the Nanushuk Group sandstone File Size: 2MB.

Get this from a library. Petrography of the Nanushuk Group and Torok Formation. [S Bartsch-Winkler; A C Huffman; Geological Survey (U.S.)].

The Torok Formation and overlying Nanushuk Formation (both mostly Albian) display the overall seismic geometry of bottomset-clinoform-topset strata indicating northeastward migration of a shelf. Named for Nanushuk River on Arctic Slope, AK. Extends in north and south direction for about 30 mi.

Consists mainly of thin-bedded gray and brown sandstone, generally fine-grained and sometimes friable; slate-colored arenaceous and impure fossiliferous limestone, dark shale or mud rock, soft uncleaved slate, fine-grained gray quartzite, drab-colored chert, and bituminous coal.

The Torok Formation and overlying Nanushuk Formation (Cretaceous, Albian–Cenomanian) comprise sediment derived from the Brooks Range and deposited in a system that prograded eastward and. Bartsch-Winkler, Susan, and Huffman, A. Curtis,Petrography of the Nanushuk Group and Torok Formation, U.S.

Geological Survey Open-File report Collins, F. R.,Test wells, Meade and Kaolak areas, Alaska, with Micropaleontology of Meade test well 1 Author: S. Bartsch-Winkler.Recent exploration drilling has targeted two major plays in the lower Brookian Nanushuk and Torok Formations.

The Nanushuk represents shelfal to non-marine topsets deposited concurrently with deeper water slope and basinal facies of the Torok Formation. Stratigraphically trapped Brookian turbidites are not uncommon, but most turbidite.

The well data and the seismic data suggests that the Nanushuk Group accumulated in shallow deltaic and fluvial settings, while the Torok Formation collected in delta slope and basin floor fan settings. Individual sequences are interpreted to contain evidence of slumping, basin floor fans, slope fans, and onlapping high stand wedges (Figure 07), and the exercise will examine this.