Warren C Day, Ph.D.
Warren Day is Scientist Emeritus with the Mineral Resources Program.
Science and Products
Filter Total Items: 59
Geochemistry, petrography, and zircon U-Pb geochronology of Paleozoic metaigneous rocks in the Mount Veta area of east-central Alaska: implications for the evolution of the westernmost part of the Yukon-Tanana terrane
We report the results of new mapping, whole-rock major, minor, and trace-element geochemistry, and petrography for metaigneous rocks from the Mount Veta area in the westernmost part of the allochthonous Yukon–Tanana terrane (YTT) in east-central Alaska. These rocks include tonalitic mylonite gneiss and mafic metaigneous rocks from the Chicken metamorphic complex and the Nasina and Fortymile River
Authors
Cynthia Dusel-Bacon, Warren C. Day, John N. Aleinikoff
Recent U.S. Geological Survey Studies in the Tintina Gold Province, Alaska, United States, and Yukon, Canada-Results of a 5-Year Project
This report presents summary papers of work conducted between 2002 and 2007 under a 5-year project effort funded by the U.S. Geological Survey Mineral Resources Program, formerly entitled 'Tintina Metallogenic Province: Integrated Studies on Geologic Framework, Mineral Resources, and Environmental Signatures.' As the project progressed, the informal title changed from 'Tintina Metallogenic Provinc
Authors
Larry P. Gough, Warren C. Day
Geologic Field Notes, Geochemical Analyses, and Field Photographs of Outcrops and Rock Samples from the Big Delta B-1 Quadrangle, East-Central Alaska
The U.S. Geological Survey, in cooperation with the Alaska Department of Natural Resources Division of Mining, Land, and Water, has released a geologic map of the Big Delta B-1 quadrangle of east-central Alaska (Day and others, 2007). This companion report presents the major element oxide and trace element geochemical analyses, including those for gold, silver, and base metals, for representative
Authors
Warren C. Day, J. Michael O'Neill
Tintina Gold Province Study, Alaska and Yukon Territory, 2002-2007
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, and Donlin Creek.
In recent years, gold exploratio
Authors
Larry P. Gough, Warren C. Day
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
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, Ca
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’
Preface and Overview). U-Pb zircon igneous
Authors
Cynthia Dusel-Bacon, John N. Aleinikoff, Wayne R. Premo, Suzanne Paradis, Ilana Lohr-Schmidt
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
Science and Products
Filter Total Items: 59
Geochemistry, petrography, and zircon U-Pb geochronology of Paleozoic metaigneous rocks in the Mount Veta area of east-central Alaska: implications for the evolution of the westernmost part of the Yukon-Tanana terrane
We report the results of new mapping, whole-rock major, minor, and trace-element geochemistry, and petrography for metaigneous rocks from the Mount Veta area in the westernmost part of the allochthonous Yukon–Tanana terrane (YTT) in east-central Alaska. These rocks include tonalitic mylonite gneiss and mafic metaigneous rocks from the Chicken metamorphic complex and the Nasina and Fortymile River
Authors
Cynthia Dusel-Bacon, Warren C. Day, John N. Aleinikoff
Recent U.S. Geological Survey Studies in the Tintina Gold Province, Alaska, United States, and Yukon, Canada-Results of a 5-Year Project
This report presents summary papers of work conducted between 2002 and 2007 under a 5-year project effort funded by the U.S. Geological Survey Mineral Resources Program, formerly entitled 'Tintina Metallogenic Province: Integrated Studies on Geologic Framework, Mineral Resources, and Environmental Signatures.' As the project progressed, the informal title changed from 'Tintina Metallogenic Provinc
Authors
Larry P. Gough, Warren C. Day
Geologic Field Notes, Geochemical Analyses, and Field Photographs of Outcrops and Rock Samples from the Big Delta B-1 Quadrangle, East-Central Alaska
The U.S. Geological Survey, in cooperation with the Alaska Department of Natural Resources Division of Mining, Land, and Water, has released a geologic map of the Big Delta B-1 quadrangle of east-central Alaska (Day and others, 2007). This companion report presents the major element oxide and trace element geochemical analyses, including those for gold, silver, and base metals, for representative
Authors
Warren C. Day, J. Michael O'Neill
Tintina Gold Province Study, Alaska and Yukon Territory, 2002-2007
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, and Donlin Creek.
In recent years, gold exploratio
Authors
Larry P. Gough, Warren C. Day
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
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, Ca
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’
Preface and Overview). U-Pb zircon igneous
Authors
Cynthia Dusel-Bacon, John N. Aleinikoff, Wayne R. Premo, Suzanne Paradis, Ilana Lohr-Schmidt
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