Publications
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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,
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 quadrangle, in which
Black Mountain is the principal physiographic feature, h
Authors
J. Michael O'Neill, Warren C. Day, John N. Alienikoff, Richard W. Saltus
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--r
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 than 1,100 km.
The apparent geophysical alignments have geologic implicatio
Authors
Richard W. Saltus
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
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 areas. The resultant data and interpretation
a
Authors
Bronwen Wang, Larry P. Gough, Richard B. Wanty, James G. Crock, Gregory K. Lee, Warren C. Day, Jim Vohden
Public geoscience at the frontiers of democracy
No abstract available.
Authors
Deborah R. Hutchinson, Richard S. Williams
Geology and origin of epigenetic lode gold deposits, Tintina Gold Province, Alaska and Yukon
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 Alaska and Yukon, and around 70 million years
ago in southwestern Alaska, late in th
Authors
Richard J. Goldfarb, Erin E. Marsh, Craig J. R. Hart, John L. Mair, Marti L. Miller, Craig Johnson
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 Pr
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 known mineral deposits. Samples were collected from e
Authors
Seth H. Mueller, Richard J. Goldfarb, Philip L. Verplanck, Thomas P. Trainor, Richard F. Sanzolone, Monique Adams
Triggering mechanism and tsunamogenic potential of the Cape Fear Slide complex, U.S. Atlantic margin
Analysis of new multibeam bathymetry data and seismic Chirp data acquired over the Cape Fear Slide complex on the U.S. Atlantic margin suggests that at least 5 major submarine slides have likely occurred there within the past 30,000 years, indicating that repetitive, large-scale mass wasting and associated tsunamis may be more common in this area than previously believed. Gas hydrate deposits and
Authors
Matthew J. Hornbach, Luc L. Lavier, Carolyn D. Ruppel
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--result
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 in the local water
table until discharge occur
Authors
Richard B. Wanty, Bronwen Wang, Jim Vohden, Warren C. Day, Larry P. Gough
Recommendations for a barrier island breach management plan for Fire Island National Seashore, including the Otis Pike High Dune Wilderness Area, Long Island, New York
The U.S Army Corps of Engineers, New York District is developing engineering plans, including
economic costs and benefits, for storm damage reduction along an 83 mile stretch of the coastal
barrier islands and beaches on the south shore of Long Island, NY from Fire Island Inlet east to the
Montauk Point headland. The plan, expected to include various alternatives for storm protection and
erosi
Authors
S. Jeffress Williams, Mary K. Foley
Book review: Remote sensing of mountain glaciers and permafrost creep
No abstract available.
Authors
Richard S. Williams
Integration of seafloor point data in usSEABED
Sediments of the beach, nearshore, and continental shelves record a complex interplay of processes including wave energy and direction , currents, beach erosion or accretion, bluff or cliff retreat, fluvial input, sediment longshore and cross-shelf transport processes, contaminant content and transport, sediment sources and sinks, and others. In turn, sediments and rocks modify wave patterns, affe
Authors
Jane A. Reid, S. Jeffress Williams, Mark Zimmermann, Chris Jenkins, Nadine E. Golden
Glacial landforms on German Bank, Scotian Shelf: evidence for Late Wisconsinan ice-sheet dynamics and implications for the formation of De Geer moraines
The extent and behaviour of the southeast margin of the Laurentide Ice Sheet in Atlantic Canada is of significance in the study of Late Wisconsinan ice sheet-ocean interactions. Multibeam sonar imagery of subglacial, ice-marginal and glaciomarine landforms on German Bank, Scotian Shelf, provides evidence of the pattern of glacial-dynamic events in the eastern Gulf of Maine. Northwest-southeast tre
Authors
Brian J. Todd, Page C. Valentine, Oddvar Longva, John Shaw