Download or read book Facies Analysis and Sedimentology of Cretaceous Nanushuk Formation at Slope Mountain Alaska written by Kevin K. Gardner and published by . This book was released on 2016 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analysis of sedimentary lithologies and structures in selected outcrop sites at Slope Mountain, Alaska identified thirteen distinct facies within a subsample of the Cretaceous (Albian-Cenomanian) Nanushuk Formation. Based on the distribution of the thirteen facies, this study defines five unique facies associations at Slope Mountain, each representing a specific depositional environment. The facies associations are as follows: 1) distributary channel bar, 2) tidal channel, 3) upper shoreface, 4) distributary mouth bar, and 5) fluvial channel. The relative stratigraphic positions of the facies associations in outcrop have implications for fluctuations in shifting shoreline positions within the Nanushuk Formation over time. The progression of facies associations within several hundred meters of section analyzed in this study depict a shift from a regressive deltaic system (sedimentation>accommodation) to an alluvial system affected by local transgression (sedimentationaccommodation). Despite significant overall accommodation in the Colville basin, the dominant pattern of Nanushuk Formation sedimentation is highly regressive, with significant progradation and aggradation of deltaic and alluvial deposits throughout the Albian-Cenomanian.

Download or read book Geology of the Nanushuk Group and Related Rocks North Slope Alaska written by A. C. Huffman and published by . This book was released on 1985 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Alluvial Facies and Paleosols in the Cretaceous Nanushuk Formation Kanayut River North Slope Alaska written by Paul J. McCarthy and published by . This book was released on 2003 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Depositional facies petrography and reservoir potential of the Fortress Mountain Formation Lower Cretaceous central North Slope Alaska written by C. M. Molenaar and published by . This book was released on 1981 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sedimentology and Stratigraphy of the Nanushuk Formation and Related Foreland Basin Deposits Central Brooks Range Foothills Alaska written by Grant Shimer and published by . This book was released on 2013 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: I interpret sedimentary facies and depositional environments from the Albian-Cenomanian Nanushuk Formation of Alaska's North Slope from sedimentary structures observed in core samples and in outcrop in the National Petroleum Reserve - Alaska (NPRA) and surrounding areas, and support these interpretations with supplemental analyses of geophysical well logs and 40Ar/39Ar dating of volcanogenic deposits. The results have implications for the reservoir characterization of a shallow, frozen oil field at Umiat, Alaska, and for interpretations of the Colville foreland basin. In the central Brooks Range foothills the Nanushuk Formation comprises shallow marine and non-marine fades associations that can be grouped into marine-distributive and river-distributive systems. In wells at Umiat, Alaska, shoreface and wave-influenced deltaic sandstones (marine-distributive systems) occur at the base of the Nanushuk Formation, followed by a marine transgression and subsequent progradation of a delta complex (river-distributive system). The shift from marine-distributive to river-distributive systems is related to shelf building processes during the Albian-Cenomanian. Marine-distributive systems occurred at or near the shelf edge in a high-energy coastal environment, whereas river-distributive systems rapidly prograded over the shallow Nanushuk shelf following transgression. Marine-distributive conditions resumed when rapidly progradational river-distributive systems reached the shelf edge. This pattern occurs in the Umiat, Wolf Creek, and Grandstand No. 1 subsurface wells. The reservoir quality of the Nanushuk Formation varies strongly with facies. Well-sorted sandstones at the top of upward-coarsening successions in both marine- and river-distributive units have the highest permeabilities within the Nanushuk Formation. Marine-distributive units have low permeability anisotropy in contrast to river-distributive units due to better sorting in wave-influenced environments and the higher frequency of impermeable lamination surfaces in deltaic sandstones. Despite coarser grain size and similar depositional environments as lower Nanushuk Formation sandstones, transgressive units at the top of the Nanushuk Formation have low permeability, probably due to the presence of calcite cement. These results suggest hat the highest quality Nanushuk Formation reservoirs most likely occur in time transgressive, regionally extensive marine-distributive sandstones of the lower Nanushuk Formation.

Download or read book Depositional Facies Petrography and Reservoir Potential of the Fortress Mountain Formation Lower Cretaceous Central North Slope Alaska written by Geological Survey (U.S.) and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Architectural Analysis and Fold Geometry of Syntectonic Fluvial Conglomerate in the Nanushuk Formation Brooks Range Foothills Alaska written by Emily Suzanne Finzel and published by . This book was released on 2004 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The fluvial style and syntectonic deposition of conglomerate in the upper part of the Nanushuk Formation are resolved using facies architectural analysis and structural geometry. Along the Kanayut River in the northern foothills of the Brooks Range, Alaska, fluvial conglomerate is exposed as benches on the north and south flanks of the Arc Mountain anticline. Photo mosaics of each bench on the north side, along with thirty-three detailed measured sections, were used to evaluate facies architecture. Eight lithofacies were described that characterize six facies associations including longitudinal and transverse gravel bars, diffuse gravel sheets, sediment gravity flow deposits, crevasse splay and floodplain deposits, and scour fills of a gravel-bed braided river. Strata on the south limb of the anticline show characteristics of syndeformational deposition during the growth of the south limb of the Arc Mountain anticline. These structural data provide new evidence for syndepositional contractional deformation during the mid-Cretaceous at this locality in the northern foothills of the Brooks Range. These results provide clues to the character and extent of potential reservoir rocks from the Nanushuk Group that are present in the subsurface of the National Petroleum Reserve in Alaska, which is important for continued recovery of natural resources on the North Slope"--Leaf iii.

Download or read book Age Determinations from Depositional Sequence Analysis and Stratigraphic Simulation of the Lower Cretaceous Torok and Nanushuk Formations North Slope of Alaska written by Sean Rockwell Ryan and published by . This book was released on 1997 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stratigraphy and Facies of Cretaceous Schrader Bluff and Prince Creek Formations in Colville River Bluffs North Slope Alaska written by Romeo M. Flores and published by . This book was released on 2007 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measured Sections of the Cretaceous Nanushuk Group Undivided Western North Slope Alaska written by A. C. Huffman and published by . This book was released on 1981 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book New Publications of the Geological Survey written by Geological Survey (U.S.) and published by . This book was released on 1989 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geological Survey Circular written by and published by . This book was released on 1983 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book List of U S Geological Survey Geologic and Water supply Reports and Maps for Alaska written by Geological Survey (U.S.) and published by . This book was released on 1987 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The United States Geological Survey in Alaska Accomplishments During written by and published by . This book was released on with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geologic Studies in Alaska by the U S Geological Survey During written by and published by . This book was released on 1992 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Catalog of Selected Offices of the Office of Surface Mining Bureau of Land Management and Geological Survey Relating to Coal 1981 written by Geological Survey (U.S.) and published by . This book was released on 1980 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessment of Undiscovered Oil and Gas Resources in the Cretaceous Nanushuk and Torok Formations Alaska North Slope and Summary of Resource Potential of the National Petroleum Reserve in Alaska 2017 written by David W. Houseknecht and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: