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Representative Bulk Composition of Oil Types for the 2002 U.S. Geological Survey Resource Assessment of National Petroleum Reserve in Alaska
Paul G. Lillis
2004, Open-File Report 2003-407
Bulk oil composition is an important economic consideration of a petroleum resource assessment. Geological and geochemical interpretations from previous North Slope studies combined with recently acquired geochemical data are used to predict representative oil gravity (?API) and sulfur content (wt.% S) of the oil types for the 2002 U.S. Geological...
National Assessment of Shoreline Change: Part 1, Historical Shoreline Changes and Associated Coastal Land Loss Along the U.S. Gulf of Mexico
Robert A. Morton, Tara L. Miller, Laura J. Moore
2004, Open-File Report 2004-1043
EXECUTIVE SUMMARY Beach erosion is a chronic problem along most open-ocean shores of the United States. As coastal populations continue to grow and community infrastructures are threatened by erosion, there is increased demand for accurate information regarding past and present trends and rates of shoreline movement. There is also a need...
Assessment of Fish Habitat, Water Quality, and Selected Contaminants in Streambed Sediments in Noyes Slough, Fairbanks, Alaska, 2001-2002
Ben W. Kennedy, Matthew S. Whitman, Robert L. Burrows, Sharon A. Richmond
2004, Water-Resources Investigations Report 2003-4328
During 2001-2002, the U.S. Geological Survey sampled streambed sediment at 23 sites, measured water quality at 26 sites, and assessed fish habitat for the entire length of Noyes Slough, a 5.5-mile slough of the Chena River in Fairbanks, Alaska. These studies were undertaken to document the environmental condition of the...
The National Assessment of Shoreline Change: A GIS Compilation of Vector Shorelines and Associated Shoreline Change Data for the U.S. Gulf of Mexico
Tara L. Miller, Robert A. Morton, Asbury H. Sallenger Jr., Laura J. Moore
2004, Open-File Report 2004-1089
Introduction The Coastal and Marine Geology Program of the U.S. Geological Survey has generated a comprehensive database of digital vector shorelines and shoreline change rates for the U.S. Gulf of Mexico. These data, which are presented herein, were compiled as part of the U.S. Geological Survey's National Assessment of Shoreline Change...
Complex trophic interactions in kelp forest ecosystems
J. A. Estes, E.M. Danner, D.F. Doak, B. Konar, A.M. Springer, P.D. Steinberg, M. Tim Tinker, T. M. Williams
2004, Bulletin of Marine Science (74) 621-638
The distributions and abundances of species and populations change almost continuously. Understanding the processes responsible is perhaps ecology’s most fundamental challenge. Kelp-forest ecosystems in southwest Alaska have undergone several phase shifts between alga- and herbivore-dominated states in recent decades. Overhunting and recovery of sea otters caused the earlier shifts. Studies...
Publications of the Volcano Hazards Program 2002
Manuel Nathenson
2004, Open-File Report 2004-1047
The Volcano Hazards Program of the U.S. Geological Survey (USGS) is part of the Geologic Hazards Assessments subactivity as funded by Congressional appropriation. Investigations are carried out in the Geology and Hydrology Disciplines of the USGS and with cooperators at the Alaska Division of Geological and Geophysical Surveys, University of...
Tertiary thrust systems and fluid flow beneath the Beaufort coastal plain (1002 area), Arctic National Wildlife Refuge, Alaska, U.S.A.
Christopher J. Potter, John A. Grow, William J. Perry Jr., Thomas E. Moore, Paul B. O'Sullivan, Jeffrey D. Phillips, Richard W. Saltus
2004, Book chapter, Deformation, fluid flow, and reservoir appraisal in foreland fold and thrust belts
Beneath the Arctic coastal plain (commonly referred to as "the 1002 area") in the Arctic National Wildlife Refuge, northeastern Alaska, United States, seismic reflection data show that the northernmost and youngest part of the Brookian orogen is preserved as a Paleogene to Neogene system of blind and buried thrust-related structures....
Two stages of deformation and fluid migration in the west-central Brooks Range fold-and-thrust belt, Northern Alaska
Thomas E. Moore, Christopher J. Potter, Paul B. O'Sullivan, Kevin L. Shelton, Michael B. Underwood
2004, Book chapter
The Brooks Range is a north-directed fold and thrust belt that forms the southern boundary of the North Slope petroleum province in northern Alaska. Field-based studies have long recognized that large-magnitude, thin-skinned folding and thrusting in the Brooks Range occurred during arc-continent collision in the Middle Jurassic to Early Cretaceous...
Paleozoic sedimentary rocks in the Red Dog Zn-Pb-Ag district and vicinity, western Brooks Range, Alaska: provenance, deposition, and metallogenic significance
John F. Slack, Julie A. Dumoulin, J.M. Schmidt, L. E. Young, Cameron Rombach
2004, Economic Geology (99) 1385-1414
Geochemical analyses of Paleozoic sedimentary rocks in the western Brooks Range reveal a complex evolutionary history for strata surrounding the large Zn-Pb-Ag deposits of the Red Dog district. Data for major elements, trace elements, and rare earth elements (REE) were obtained on 220 samples of unaltered and unmineralized siliciclastic rocks...
A kinematic model for the southern Alaska orocline based on regional fault patterns
Jonathan M.G. Glen
Aviva J. Sussman, Arlo B. Weil, editor(s)
2004, Book chapter, Orogenic curvature: Integrating paleomagnetic and structural analyses
Among the most prominent physiographic features of southern Alaska are a series of nested arcuate lineations, including the Denali fault, that parallel the concave-southward southern coastline of the state. These features are generally interpreted as major dextral shear zones that formed in the Late Cretaceous to early Tertiary in response...
Nature of hydrothermal fluids at the shale-hosted Red Dog Zn-Pb-Ag deposits, Brooks Range, Alaska
David L. Leach, Erin E. Marsh, Poul Emsbo, Cameron Rombach, Karen D. Kelley, Michael W. Anthony
2004, Economic Geology (99) 1449-1480
The Red Dog Zn-Pb-Ag district in the western Brooks Range, northern Alaska, contains numerous shale-hosted Zn-Pb sulfide and barite deposits in organic-rich siliceous mudstone and shale, chert, and carbonate rocks of the Carboniferous Kuna Formation. The giant Red Dog shale-hosted deposits consist of a cluster of four orebodies (Main, Qanaiyaq,...
A geologic framework for mineralization in the western Brooks Range
Lorne E. Young
2004, Economic Geology (99) 1281-1306
The Brooks Range is a 950-km-long north-vergent fold and thrust belt, which was formed during Mesozoic convergence of the continental Arctic Alaska terrane and the oceanic Angayucham terrane and was further shortened and uplifted in Tertiary time. The Arctic Alaska terrane consists of parautochthonous rocks and the Endicott Mountains and...
Structure of the Red Dog District, western Brooks Range, Alaska
Jean-Pierre P. de Vera, K. R. McClay
2004, Economic Geology (99) 1415-1434
The Red Dog district of the western Brooks Range of northern Alaska, which includes the sediment-hosted Zn-Pb-Ag ± Ba deposits at Red Dog, Su-Lik, and Anarraaq, contains one of the world's largest reserves of zinc. This paper presents a new model for the structural development of the area and shows...
40Ar/39Ar Dating of Zn-Pb-Ag Mineralization in the Northern Brooks Range, Alaska
Melanie B. Werdon, Paul W. Layer, Rainer J. Newberry
2004, Economic Geology (99) 1323-1343
The 40Ar/39Ar laser step-heating method potentially can be used to provide absolute ages for a number of formerly undatable, low-temperature ore deposits. This study demonstrates the use of this method by determining absolute ages for Zn-Pb-Ag sediment-hosted massive sulfide deposits and vein-breccia occurrences found throughout a 300-km-long, east-west-trending belt in...
Ground-nesting marine birds and potential for human disturbance in Glacier Bay National Park
Mayumi L. Arimitsu, Marc D. Romano, John F. Piatt
John F. Piatt, S.M. Gende, editor(s)
2004, Conference Paper, Proceedings of the Fourth Glacier Bay Science Symposium
Glacier Bay National Park and Preserve contains a diverse assemblage of marine birds that use the area for nesting, foraging and molting. The abundance and diversity of marine bird species in Glacier Bay is unmatched in the region, due in part to the geomorphic and successional characteristics that result in...
Textural, compositional, and sulfur isotope variations of sulfide minerals in the Red Dog Zn-Pb-Ag deposits, Brooks Range, Alaska: Implications for Ore Formation
K.D. Kelley, D. L. Leach, C. A. Johnson, J.L. Clark, M. Fayek, J. F. Slack, V.M. Anderson, R. A. Ayuso, W.I. Ridley
2004, Economic Geology (99) 1509-1532
The Red Dog Zn-Pb deposits are hosted in organic-rich mudstone and shale of the Mississippian Kuna Formation. A complex mineralization history is defined by four sphalerite types or stages: (1) early brown sphalerite, (2) yellow-brown sphalerite, (3) red-brown sphalerite, and (4) late tan sphalerite. Stages 2 and 3 constitute the...
Sustaining salmonid populations: A caring understanding of naturalness of taxa
Jennifer L. Nielsen, Henry A. Regier
E. Eric Knudsen, editor(s)
2004, Conference Paper, Sustainable management of North American fisheries: American Fisheries Society Symposium 43
Species of the family of Salmonidae occur naturally in Northern Hemisphere waters that remain clear and cool to cold in summer. For purposes of reproduction, salmonids generally behaviorally respond to the currents of streams and lakes in recently glaciated areas. For feeding and maturation, many larger species migrate into existing...
Surface rupture and slip distribution of the Denali and Totschunda faults in the 3 November 2002 M 7.9 earthquake, Alaska
Peter J. Haeussler, David P. Schwartz, Timothy E. Dawson, Heidi D. Stenner, James J. Lienkaemper, Brian L. Sherrod, Francesca R. Cinti, Paola Montone, Patricia Craw, Anthony J. Crone, Stephen F. Personius
2004, Bulletin of the Seismological Society of America (94) S23-S52
The 3 November 2002 Denali fault, Alaska, earthquake resulted in 341 km of surface rupture on the Susitna Glacier, Denali, and Totschunda faults. The rupture proceeded from west to east and began with a 48-km-long break on the previously unknown Susitna Glacier thrust fault. Slip on this thrust averaged about...
Status of sea otter populations in southcentral and southeast Alaska, 2002-2003
James L. Bodkin
Daniela Maldini, Donald Calkins, Shannon Atkinson, Rosa Meehan, editor(s)
2004, Conference Paper, Alaska Sea Otter Research Workshop: Addressing the Decline of the Southwestern Alaska Sea Otter Population
During the years 2002-2004 estimated sea otter population sizes were calculated for Southeast Alaska, Prince William Sound, and the Kenai Peninsula and Cook Inlet regions of Alaska. Aerial surveys were conducted by a single observer from a float-equipped Bellanca Scout fixed-wing aircraft flying at 91 m altitude and 65 mph....
Sulfur and oxygen isotopes in barite deposits of the western Brooks Range, Alaska, and implications for the origin of the Red Dog massive sulfide deposits
C. A. Johnson, K.D. Kelley, D. L. Leach
2004, Economic Geology (99) 1435-1448
Sulfur and oxygen isotope analyses have been obtained for barite samples from the giant stratiform sulfide barite deposits at Red Dog in the western Brooks Range of Alaska, from stratiform barite deposits elsewhere in the Red Dog district, and from stratiform and vein and breccia barite occurrences in the central...