Blue Mountain and the Gas Rocks: Rear-arc dome clusters on the Alaska Peninsula
Wes Hildreth, Judith Fierstein, Andrew T. Calvert
2007, Professional Paper 1739-A
Behind the single-file chain of stratovolcanoes on the Alaska Peninsula, independent rear-arc vents for mafic magmas are uncommon, and for silicic magmas rarer still. We report here the characteristics, compositions, and ages of two andesite-dacite dome clusters and of several nearby basaltic units, all near Becharof Lake and 15 to...
Mid-holocene sector collapse at Mount Spurr Volcano, South-Central Alaska
Christopher F. Waythomas
2007, Professional Paper 1739-C
Radiocarbon-dated volcanic mass-flow deposits on the southeast flank of Mount Spurr in south-central Alaska provide strong evidence for the timing of large-scale destruction of the south flank of the volcano by sector collapse at 4,769^ndash;4,610 yr B.P. The sector collapse created an avalanche caldera and produced an ~1-km3-volume clay-rich debris...
Major- and Trace-Element Concentrations in Rock Samples Collected in 2006 from the Taylor Mountains 1:250,000-scale Quadrangle, Alaska
Edward P. Klimasauskas, Marti L. Miller, Dwight Bradley
2007, Open-File Report 2007-1386
Introduction The Kuskokwim mineral belt of Bundtzen and Miller (1997) forms an important metallogenic region in southwestern Alaska that has yielded more than 3.22 million ounces of gold and 400,000 ounces of silver. Precious-metal and related deposits in this region associated with Late Cretaceous to early Tertiary igneous complexes extend into...
Mining Claim Activity on Federal Land in the United States
J. Douglas Causey
2007, Data Series 290
Several statistical compilations of mining claim activity on Federal land derived from the Bureau of Land Management's LR2000 database have previously been published by the U.S Geological Survey (USGS). The work in the 1990s did not include Arkansas or Florida. None of the previous reports included Alaska because it is...
Atlantic salmon genetics: Past, present and what's in the future?
Jennifer L. Nielsen
Eric Verspoor, Lee Stradmeyer, Jennifer L. Nielsen, editor(s)
2007, Book chapter, The atlantic salmon: Genetics, conservation and management
No abstract available...
Great Basin Paleontological Bibliography
Robert B. Blodgett, Ning Zhang, Albert H. Hofstra, Jared R. Morrow
2007, Open-File Report 2006-1379
Introduction This work was conceived as a derivative product for 'The Metallogeny of the Great Basin' project of the Mineral Resources Program of the U.S. Geological Survey. In the course of preparing a fossil database for the Great Basin that could be accessed from the Internet, it was determined that a...
Supplemental materials for the analysis of capture-recapture data for polar bears in Western Hudson Bay, Canada, 1984-2004
Eric V. Regehr, Nicholas J. Lunn, Steven C. Amstrup, Ian Stirling
2007, Data Series 304
Regehr and others (2007, Survival and population size of polar bears in western Hudson Bay in relation to earlier sea ice breakup: Journal of Wildlife Management, v. 71, no. 8) evaluated survival in relation to climatic conditions and estimated population size for polar bears (Ursus maritimus) in western Hudson Bay,...
About the geologic map in the National Atlas of the United States of America
John C. Reed, Charles A. Bush
2007, Circular 1300
Introduction The geologic map in the National Atlas of the United States of America shows the age, distribution, and general character of the rocks that underlie the Nation, including Alaska, Hawaii, Puerto Rico, and the Virgin Islands (but excluding other small island possessions). (The National Atlas of the United States...
Chemical data for rock, sediment, biological, precipitate, and water samples from abandoned copper mines in Prince William Sound, Alaska
Randolph A. Koski, LeeAnn Munk
2007, Open-File Report 2007-1359
Introduction In the early 20th century, approximately 6 million metric tons of copper ore were mined from numerous deposits located along the shorelines of fjords and islands in Prince William Sound, Alaska. At the Beatson, Ellamar, and Threeman mine sites (fig. 1), rocks containing Fe, Cu, Zn, and Pb sulfide minerals...
Water and sediment quality in the Yukon River and its tributaries between Atlin, British Columbia, Canada, and Eagle, Alaska, USA, 2004
Douglas R. Halm, Mark M. Dornblaser
2007, Open-File Report 2007-1197
The Yukon River basin is the fourth largest watershed in North America at 855,300 square kilometers (km2). Approximately 126,000 people live within the basin and depend on the Yukon River and its tributaries for drinking water, commerce, subsistence and recreational fish and game resources.Climate warming in the Arctic...
Introduction to Regional Geology, Tectonics, and Metallogenesis of Northeast Asia
Leonid M. Parfenov, Gombosuren Badarch, Nikolai A. Berzin, Duk-Hwan Hwang, Alexander I. Khanchuk, Mikhail I. Kuzmin, Warren J. Nokleberg, Alexander O. Obolenskiy, Masatsugu Ogasawara, Andrei V. Prokopiev, Sergey M. Rodionov, Alexander P. Smelov, Hongquan Yan
2007, Open-File Report 2007-1183-A
Purpose This introduction presents an overview of the regional geology, tectonics, and metallogenesis of Northeast Asia. The major purposes are to provide a relatively short summary of these features for readers who are unfamiliar with Northeast Asia; a general scientific introduction for the succeeding chapters of this volume; and an overview...
Tintina Gold Province Study, Alaska and Yukon Territory, 2002-2007
Larry P. Gough, Warren C. Day
2007, Fact Sheet 2007-3061
The Tintina gold province is an arc-shaped 2,000-kilometer-long metallogenic province that extends from northern British Columbia, through the Yukon Territory, and across and into southwestern Alaska. In the United States, the province remains a prime area for gold exploration and includes such large gold deposits as Pogo, Fort Knox-True North,...
Preface
Yousif K. Kharaka, James K. Otton
2007, Applied Geochemistry (22) 2095-2098
Energy is the essential commodity that powers the expanding global economy. Starting in the 1950s, oil and natural gas became the main sources of primary energy for the rapidly increasing world population (Edwards, 1997). In 2003, petroleum was the source for 62.1% of global energy, and projections by energy...
Geoscience for Alaska's D-1 lands: A preliminary report
Jeanine M. Schmidt, B. M. Gamble, Keith A. Labay
2007, Open-File Report 2007-1286
Purpose of This Report This interim report follows from the June 2006 recommendations to Congress by the BLM concerning disposition of the d-1 lands. That report recommended lifting of a significant number of d-1 PLOs, through the ongoing land management process within the BLM (e.g. resource management planning areas), or...
Technical-information products for a National Volcano Early Warning System
Marianne C. Guffanti, Steven R. Brantley, Peter F. Cervelli, Christopher J. Nye, George N. Serafino, Lee Siebert, Dina Y. Venezky, Lisa A. Wald
2007, Open-File Report 2007-1250
Technical outreach — distinct from general-interest and K-12 educational outreach — for volcanic hazards is aimed at providing usable scientific information about potential or ongoing volcanic activity to public officials, businesses, and individuals in support of their response, preparedness, and mitigation efforts. Within the context of a National Volcano Early...
Seismic detection and analysis of icequakes at Columbia Glacier, Alaska
Shad O’Neel, Hans P. Marshall, Daniel E. McNamara, William Tad Pfeffer
2007, Journal of Geophysical Research (112)
Contributions to sea level rise from rapidly retreating marine-terminating glaciers are large and increasing. Strong increases in iceberg calving occur during retreat, which allows mass transfer to the ocean at a much higher rate than possible through surface melt alone. To study this process, we deployed an 11-sensor passive seismic...
Determining the pattern of cementum annuli and relationship to reproduction in male sea otters
Josh Proper, Vanessa R. von Biela, Jennifer M. Burns
2007, Ethnicity and Disease (17) S545-S547
Since the early 1990s, the southwestern Alaskan sea otter (Enhydra lutris) population has declined dramatically and the cause has yet to be determined. Population trajectories of large mammals are determined by three factors: survival rate, reproduction rate, and age of first reproduction (AFR). Of these three, AFR should respond first...
Sockeye salmon evolution, ecology, and management
Carol Ann Woody
2007, Scitech Book News (31)
This collection of articles and photographs gives managers a good idea of recent research into what the sockeye salmon is and does, covering such topics as the vulnerability and value of sockeye salmon ecotypes, their homing ability, using new technologies to monitor reproduction, DNA and a founder event in the...
Geologic Map of the Big Delta B-1 Quadrangle, East-Central Alaska
Warren C. Day, J. Michael O’Neill, John N. Aleinikoff, Gregory N. Green, Richard W. Saltus, Larry P. Gough
2007, Scientific Investigations Map 2975
Geologic mapping and U-Pb age dating of rocks from the Big Delta B-1 quadrangle, east-central Alaska, have yielded new insights into the geology and gold mineral resource for the headwater region of the Goodpaster River, northeast of Delta, Alaska. The area lies within the Yukon-Tanana Upland and is underlain by...
Assessment of hydrology, water quality, and trace elements in selected placer-mined creeks in the birch creek watershed near central, Alaska, 2001-05
Ben W. Kennedy, Dustin E. Langley
2007, Scientific Investigations Report 2007-5124
Executive Summary The U.S. Geological Survey, in cooperation with the Bureau of Land Management, completed an assessment of hydrology, water quality, and trace-element concentrations in streambed sediment of the upper Birch Creek watershed near Central, Alaska. The assessment covered one site on upper Birch Creek and paired sites, upstream and...
Geophysical Characterization of Pre-Cenozoic Basement for Hydrocarbon Assessment, Yukon Flats, Alaska
R. W. Saltus, J. D. Phillips, R. G. Stanley, A. Till, R. L. Morin
2007, Open-File Report 2007-1208
The Cenozoic basins of interior Alaska are poorly understood, but may host undiscovered hydrocarbon resources in sufficient quantities to serve remote villages and for possible export. Purported oil seeps and the regional occurrence of potential hydrocarbon source and reservoir rocks fuel an exploration interest in the 46,000 km2 Yukon Flats...
Revision of Time-Independent Probabilistic Seismic Hazard Maps for Alaska
Robert L. Wesson, Oliver S. Boyd, Charles S. Mueller, Charles G. Bufe, Arthur D. Frankel, Mark D. Petersen
2007, Open-File Report 2007-1043
We present here time-independent probabilistic seismic hazard maps of Alaska and the Aleutians for peak ground acceleration (PGA) and 0.1, 0.2, 0.3, 0.5, 1.0 and 2.0 second spectral acceleration at probability levels of 2 percent in 50 years (annual probability of 0.000404), 5 percent in 50 years (annual probability of...
Digital outlines and topography of the glaciers of the American West
Andrew G. Fountain, Matthew Hoffman, Keith Jackson, Hassan Basagic, Thomas Nylen, David Percy
2007, Open-File Report 2006-1340
Alpine glaciers have generally receded during the past century (post-“Little Ice Age”) because of climate warming (Oerlemans and others, 1998; Mann and others, 1999; Dyurgerov and Meier, 2000; Grove, 2001). This general retreat has accelerated since the mid 1970s, when a shift in atmospheric circulation occurred (McCabe and Fountain, 1995;...
USGS Western Coastal and Marine Geology Team
Sam Johnson, Helen Gibbons
2007, Fact Sheet 2007-3050
The Western Coastal and Marine Geology Team of the U.S. Geological Survey (USGS) studies the coasts of the western United States, including Alaska and Hawai‘i. Team scientists conduct research, monitor processes, and develop information about coastal and marine geologic hazards, environmental conditions, habitats, and energy and mineral resources. This information...
Preliminary volcano-hazard assessment for the Tanaga volcanic cluster, Tanaga Island, Alaska
Michelle L. Coombs, Robert G. McGimsey, Brandon L. Browne
2007, Scientific Investigations Report 2007-5094
Summary of Volcano Hazards at Tanaga Volcanic Cluster The Tanaga volcanic cluster lies on the northwest part of Tanaga Island, about 100 kilometers west of Adak, Alaska, and 2,025 kilometers southwest of Anchorage, Alaska. The cluster consists of three volcanoes-from west to east, they are Sajaka, Tanaga, and Takawangha. All...
