Geologic Mapping and Mineral Resource Assessment of the Healy and Talkeetna Mountains Quadrangles, Alaska Using Minimal Cloud- and Snow-Cover ASTER Data
Bernard E. Hubbard, Lawrence C. Rowan, Cynthia Dusel-Bacon, Robert G. Eppinger
2007, Open-File Report 2007-1046
On July 8, 2003, ASTER acquired satellite imagery of a 60 km-wide swath of parts of two 1:250,000 Alaska quadrangles, under favorable conditions of minimal cloud- and snow-cover. Rocks from eight different lithotectonic terranes are exposed within the swath of data, several of which define permissive tracts for various mineral...
Hydraulic survey and scour assessment of Bridge 524, Tanana River at Big Delta, Alaska
Thomas A. Heinrichs, Dustin E. Langley, Robert L. Burrows, Jeffrey S. Conaway
2007, Scientific Investigations Report 2006-5282
Bathymetric and hydraulic data were collected August 26–28, 1996, on the Tanana River at Big Delta, Alaska, at the Richardson Highway bridge and Trans-Alaska Pipeline crossing. Erosion along the right (north) bank of the river between the bridge and the pipeline crossing prompted the data collection. A water-surface profile hydraulic model...
Alaska Science Center: Providing Timely, Relevant, and Impartial Study of the Landscape, Natural Resources, and Natural Hazards for Alaska and Our Nation
USGS Alaska Science Center
2007, Fact Sheet 2007-3019
The U.S. Geological Survey (USGS), the Nation's largest water, earth, and biological science and civilian mapping agency, has studied the natural features of Alaska since its earliest geologic expeditions in the 1800s. The USGS Alaska Science Center (ASC), with headquarters in Anchorage, Alaska, studies the complex natural science phenomena of...
Regional geochemical results from the reanalysis of NURE stream sediment samples -- Eagle 3 degree quadrangle, east-central Alaska
J.G. Crock, Paul H. Briggs, L. P. Gough, R. B. Wanty, Z. A. Brown
2007, Open-File Report 2007-1075
This report presents reconnaissance geochemical data for a cooperative study in the Fortymile Mining District, east-central Alaska, initiated in 1997. This study has been funded by the U.S. Geological Survey (USGS) Mineral Resources Program. Cooperative funds were provided from various State of Alaska sources through the Alaska Department of Natural...
Publications of the Volcano Hazards Program 2005
Manuel Nathenson
2007, Open-File Report 2007-1064
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...
Philopatry: A return to origins
John M. Pearce
2007, The Auk (124) 1085-1087
The word “philopatry” is a combination of the prefix philo (from the Greekphilos, “beloved”) and the Latin patria, which means “fatherland” or “homeland.” Since the first English-language use of “philopatry” in an ornithological context by Huntington (1951), the term has been applied to two types of site-faithful behavior in birds. Closest to the etymological meaning...
Hydrology and glacier-lake-outburst floods (1987-2004) and water quality (1998-2003) of the Taku River near Juneau, Alaska
Edward G. Neal
2007, Scientific Investigations Report 2007-5027
The Taku River Basin originates in British Columbia, Canada, and drains an area of 6,600 square miles at the U.S. Geological Survey's Taku River gaging station. Several mines operated within the basin prior to 1957, and mineral exploration has resumed signaling potential for future mining developments. The U.S. Geological Survey...
International Polar Year: Science at the Ends of the Earth
Water Resources Division, U.S. Geological Survey
2007, Fact Sheet 2007-3013
In response to unprecedented changes in the fragile polar regions of our planet, the International Polar Year (IPY) 2007-2008 will encompass many scientific studies designed to improve our understanding of polar change and its effects on Earth's ecosystems and people. For 2 years, U.S. Geological Survey (USGS) researchers will don...
Water and Sediment Quality in the Yukon River Basin, Alaska, During Water Year 2005
Paul F. Schuster
2007, Open-File Report 2007-1037
OVERVIEW: This report contains water-quality and sediment-quality data from samples collected in the Yukon River Basin from March through September during the 2005 water year (WY). Samples were collected throughout the year at five stations in the basin (three on the main stem Yukon River, one each on the Tanana...
Status review of the Marbled Murrelet (Brachyramphus marmoratus) in Alaska and British Columbia
John F. Piatt, K.J. Kuletz, A.E. Burger, Scott A. Hatch, Vicki L. Friesen, T.P. Birt, Mayumi L. Arimitsu, G.S. Drew, A.M.A. Harding, K.S. Bixler
2007, Open-File Report 2006-1387
The Marbled Murrelet (Brachyramphus marmoratus) is a small, diving seabird inhabiting inshore waters of the Northeastern Pacific Ocean. This species feeds on small, schooling fishes and zooplankton, and nests primarily on the moss-covered branches of large, old-growth conifers, and also, in some parts of its range, on the ground. We...
Foraging behaviors of Surf Scoters and White-Winged Scoters during spawning of Pacific herring
Daniel Esler, Sean Boyd
2007, Condor (109) 216-222
Winter diets of Surf (Melanitta perspicillata) and White-winged Scoters (M. fusca) are composed primarily of bivalves. During spawning of Pacific herring (Clupea pallasi) in early spring, scoters shift their diets to herring eggs. Using radio-telemetry, we contrasted scoter foraging behaviors between winter and herring spawning periods. Scoters increased their dive...
3D Visualization of Earthquake Focal Mechanisms Using ArcScene
Keith A. Labay, Peter J. Haeussler
2007, Data Series 241
We created a new tool, 3D Focal Mechanisms (3DFM), for viewing earthquake focal mechanism symbols three dimensionally. This tool operates within the Environmental Systems Research Institute (ESRI®) GIS software ArcScene® 9.x. The program requires as input a GIS point dataset of earthquake locations containing strike, dip, and rake values for...
Effects of predation by sea ducks on clam abundance in soft-bottom intertidal habitats
Tyler Lewis, Daniel Esler, W. Sean Boyd
2007, Marine Ecology Progress Series (329) 131-144
Recent studies have documented strong, top-down predation effects of sea ducks on mussel populations in rocky intertidal communities. However, the impact of these gregarious predators in soft-bottom communities has been largely unexplored. We evaluated effects of predation by wintering surf scoters Melanitta perspicillata and white-winged scoters M. fusca on clam populations in soft-bottom intertidal...
Tectonic setting and metallogenesis of volcanogenic massive sulfide deposits in the Bonnifield Mining District, Northern Alaska Range: Chapter B in Recent U.S. Geological Survey studies in the Tintina Gold Province, Alaska, United States, and Yukon, Canada--results of a 5-year project
Cynthia Dusel-Bacon, John N. Aleinikoff, Wayne R. Premo, Suzanne Paradis, Ilana Lohr-Schmidt
Larry P. Gough, Warren C. Day, editor(s)
2007, Scientific Investigations Report 2007-5289-B
This paper summarizes the results of field and laboratory investigations, including whole-rock geochemistry and radiogenic isotopes, of outcrop and drill core samples from volcanogenic massive sulfide (VMS) deposits and associated metaigneous rocks in the Wood River area of the Bonnifield mining district, northern Alaska Range (see fig. 1 of Editors’...
Mapping known and potential mineral occurrences and host rocks in the Bonnifield Mining District using minimal cloud- and snow-cover ASTER data: Chapter E in Recent U.S. Geological Survey studies in the Tintina Gold Province, Alaska, United States, and Yukon, Canada--results of a 5-year project
Bernard E. Hubbard, Cynthia Dusel-Bacon, Lawrence C. Rowan, Robert G. Eppinger
Larry P. Gough, Warren C. Day, editor(s)
2007, Scientific Investigations Report 2007-5289-E
On July 8, 2003, the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) sensor acquired satellite imagery of a 60-kilometer-wide swath covering a portion of the Bonnifield mining district within the southernmost part of the Tintina Gold Province, Alaska, under unusually favorable conditions of minimal cloud and snow cover. Although...
Submarine slope failures near Seward, Alaska, during the M9.2 1964 earthquake
Peter J. Haeussler, H.J. Lee, H. F. Ryan, Keith A. Labay, R. E. Kayen, M. A. Hampton, E. Suleimani
2007, Book chapter, Submarine mass movements and their consequences
Following the 1964 M9.2 megathrust earthquake in southern Alaska, Seward was the only town hit by tsunamis generated from both submarine landslides and tectonic sources. Within 45 seconds of the start of the earthquake, a 1.2-km-long section of waterfront began sliding seaward, and soon after, ~6-8-m high waves inundated the...
The biogeochemistry and occurrence of unusual plant species inhabiting acidic, metal-rich water, Red Mountain, Bonnifield district, Alaska Range: Chapter J in Recent U.S. Geological Survey studies in the Tintina Gold Province, Alaska, United States, and Yukon, Canada--results of a 5-year project
Larry P. Gough, Robert G. Eppinger, Paul H. Briggs
2007, Scientific Investigations Report 2007-5289-J
This report presents results on the occurrence and biogeochemistry of unusual plant species, and of their supporting sediment, in an undisturbed volcanogenic massive sulfide deposit in the Tintina Gold Province (see fig. 1 of Editors’ Preface and Overview). The extraordinary plant assemblage found growing in the acidic metal-rich waters that...
Environmental geochemical study of Red Mountain--an undisturbed volcanogenic massive sulfide deposit in the Bonnifield District, Alaska range, east-central Alaska: Chapter I in Recent U.S. Geological Survey studies in the Tintina Gold Province, Alaska, United States, and Yukon, Canada--results of a 5-year project
Robert G. Eppinger, Paul H. Briggs, Cynthia Dusel-Bacon, Stuart A. Giles, Larry P. Gough, Jane M. Hammarstrom, Bernard E. Hubbard
2007, Scientific Investigations Report 2007-5289-I
The Red Mountain volcanogenic massive sulfide (VMS) deposit exhibits well-constrained examples of acid-generating, metal-leaching, metal-precipitation, and self-mitigation (via co-precipitation, dilution, and neutralization) processes that occur in an undisturbed natural setting, a rare occurrence in North America. The unmined pyrite-rich deposit displays a remarkable environmental footprint of natural acid generation, high...
The Black Mountain tectonic zone--a reactivated northeast-trending crustal shear zone in the Yukon-Tanana Upland of east-central Alaska: Chapter D in Recent U.S. Geological Survey studies in the Tintina Gold Province, Alaska, United States, and Yukon, Canada--results of a 5-year project
J. Michael O’Neill, Warren C. Day, John N. Alienikoff, Richard W. Saltus
Larry P. Gough, Warren C. Day, editor(s)
2007, Scientific Investigations Report 2007-5289-D
The Black Mountain tectonic zone in the YukonTanana terrane of east-central Alaska is a belt of diverse northeast-trending geologic features that can been traced across Black Mountain in the southeast corner of the Big Delta 1°×3° degree quadrangle. Geologic mapping in the larger scale B1 quadrangle of the Big Delta...
Reassessment of seismically induced, tsunamigenic submarine slope failures in Port Valdez, Alaska, USA
H.J. Lee, H. F. Ryan, Peter J. Haeussler, R. E. Kayen, M. A. Hampton, Jacques Locat, E. Suleimani, C. R. Alexander
Vasilis Lykousis, Dimitris Sakellariou, Jacques Locat, editor(s)
2007, Book chapter, Submarine mass movements and their consequences: 3rd international symposium (Advances in natural and technological hazards research volume 27)
The M9.2 Alaska earthquake of 1964 caused major damage to the port facilities and town of Valdez, most of it the result of submarine landslide and the consequent tsunamis. Recent bathymetric multibeam surveys, high-resolution subbottom profiles, and dated sediment cores in Port Valdez supply new information about the morphology and...
Matching magnetic trends and patterns across the Tintina fault, Alaska and Canada--evidence for offset of about 490 kilometers: Chapter C in Recent U.S. Geological Survey studies in the Tintina Gold Province, Alaska, United States, and Yukon, Canada--results of a 5-year project
Richard W. Saltus
Larry P. Gough, Warren C. Day, editor(s)
2007, Scientific Investigations Report 2007-5289-C
Magnetic anomaly patterns on opposite sides of the mapped Tintina fault in eastern Alaska and western Canada show an apparent offset of about 490 kilometers (km), probably of Eocene age. This estimate is compared with previous geologically based estimates of 400 to 430 km and paleomagnetically based estimates of more...
Landscape geochemistry near mineralized areas of eastern Alaska: Chapter H in Recent U.S. Geological Survey studies in the Tintina Gold Province, Alaska, United States, and Yukon, Canada--results of a 5-year project
Bronwen Wang, Larry P. Gough, Richard B. Wanty, James G. Crock, Gregory K. Lee, Warren C. Day, Jim Vohden
2007, Scientific Investigations Report 2007-5289-H
The Pogo lode gold deposit was discovered in eastern Alaska in the early 1990s and provided the opportunity to study elemental distribution and mobility in the natural environment prior to mine development. Studying mineralized systems prior to mining allows us to compare the natural biogeochemical signature in mineralized versus nonmineralized...
Geology and origin of epigenetic lode gold deposits, Tintina Gold Province, Alaska and Yukon
Richard J. Goldfarb, Erin E. Marsh, Craig J. R. Hart, John L. Mair, Marti L. Miller, Craig Johnson
Larry P. Gough, Warren C. Day, editor(s)
2007, Scientific Investigations Report 2007-5289-A
More than 50 million ounces of lode gold resources have been defined in the previous 15 years throughout accreted terranes of interior Alaska and in adjacent continental margin rocks of Yukon. The major deposits in this so-called Tintina Gold Province formed around 105 to 90 million years ago in east-central...
Surface-water, ground-water, and sediment geochemistry of epizonal and shear-hosted mineral deposits in the Tintina Gold Province--arsenic and antimony distribution and mobility: Chapter G in Recent U.S. Geological Survey studies in the Tintina Gold Province, Alaska, United States, and Yukon, Canada--results of a 5-year project
Seth H. Mueller, Richard J. Goldfarb, Philip L. Verplanck, Thomas P. Trainor, Richard F. Sanzolone, Monique Adams
Larry P. Gough, Warren C. Day, editor(s)
2007, Scientific Investigations Report 2007-5289-G
Epigenetic mineral deposits in the Tintina Gold Province are generally characterized by high concentrations of arsenic and antimony in their mineral assemblage. A total of 347 samples (ground water, surface water, and stream sediment) were collected to investigate the distribution and mobility of arsenic and antimony in the environment near...
Aufeis accumulations in stream bottoms in arctic and subarctic environments as a possible indicator of geologic structure: Chapter F in Recent U.S. Geological Survey studies in the Tintina Gold Province, Alaska, United States, and Yukon, Canada--results of a 5-year project
Richard B. Wanty, Bronwen Wang, Jim Vohden, Warren C. Day, Larry P. Gough
Larry P. Gough, Warren C. Day, editor(s)
2007, Scientific Investigations Report 2007-5289-F
Thick accumulations of ice, called “aufeis,” form during winter along stream and river valleys in arctic and subarctic regions. In high-gradient alpine streams, aufeis forms mostly as a result of ground-water discharge into the stream channel. The ice occludes this discharge, perturbing the steady-state condition, and causing an incremental rise...
