Publications
Listed below are publication products directly associated with the Geology, Energy & Minerals Science Center:
Filter Total Items: 1166
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
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 rocks from more than eight different
li
Authors
Bernard E. Hubbard, Cynthia Dusel-Bacon, Lawrence C. Rowan, Robert G. Eppinger
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, an
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 drain the area is composed predominantly of
bryop
Authors
Larry P. Gough, Robert G. Eppinger, Paul H. Briggs
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,
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
Authors
Robert G. Eppinger, Paul H. Briggs, Cynthia Dusel-Bacon, Stuart A. Giles, Larry P. Gough, Jane M. Hammarstrom, Bernard E. Hubbard
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
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
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
Environmental geochemistry at Red Mountain, an unmined volcanogenic massive sulphide deposit in the Bonnifield district, Alaska Range, east-central Alaska
The unmined, pyrite-rich Red Mountain (Dry Creek) deposit displays a remarkable environmental footprint of natural acid generation, high metal and exceedingly high rare earth element (REE) concentrations in surface waters. The volcanogenic massive sulphide deposit exhibits well-constrained examples of acid-generating, metal-leaching, metal-precipitation and self-mitigation (via co-precipitation, d
Authors
Robert G. Eppinger, Paul H. Briggs, Cynthia Dusel-Bacon, Stuart A. Giles, Larry P. Gough, Jane M. Hammarstrom, Bernard E. Hubbard
Estimating the amount of eroded section in a partially exhumed basin from geophysical well logs: An example from the North Slope
The reconstruction of burial and thermal histories of partially exhumed basins requires an estimation of the amount of erosion that has occurred since the time of maximum burial. We have developed a method for estimating eroded thickness by using porosity-depth trends derived from borehole sonic logs of wells in the Colville Basin of northern Alaska. Porosity-depth functions defined from sonic-por
Authors
W. Matthew Burns, Daniel O. Hayba, Elisabeth L. Rowan, David W. Houseknecht