Erin Marsh
Erin Marsh is a Research Geologist with the Geology, Geophysics, and Geochemistry Science Center.
Science and Products
Filter Total Items: 22
Nickel-cobalt laterites: a deposit model
Nickel-cobalt (Ni-Co) laterite deposits are supergene enrichments of Ni±Co that form from intense chemical and mechanical weathering of ultramafic parent rocks. These regolith deposits typically form within 26 degrees of the equator, although there are a few exceptions. They form in active continental margins and stable cratonic settings. It takes as little as one million years for a laterite prof
Authors
Erin E. Marsh, Eric D. Anderson, Floyd Gray
Mauritania – A greenfields exploration opportunity in northwestern Africa
No abstract available.
Authors
Cliff D. Taylor, E. D. Anderson, D. C. Bradley, G. Beaudoin, Michael A. Cosca, Robert G. Eppinger, Gregory L. Fernette, Carol A. Finn, Michael J. Friedel, Stuart A. Giles, Richard J. Goldfarb, John D. Horton, Gregory K. Lee, Erin E. Marsh, Jeffrey L. Mauk, Holly A. Motts, M. Y. Ould El Joud, S. Ould Soueidatt, A. Ould Taleb Mohamed, Barnaby W. Rockwell
Mineral potential tracts for orogenic, Carlin-like, and epithermal gold deposits in the Islamic Republic of Mauritania, (phase V, deliverable 68): Chapter H1 in Second projet de renforcement institutionnel du secteur minier de la République Islamique
In 1996, at the request of the Government of the Islamic Republic of Mauritania, a team of U.S. Geological Survey (USGS) scientists produced a strategic plan for the acquisition, improvement and modernization of multidisciplinary sets of data to support the growth of the Mauritanian minerals sector and to highlight the geological and mineral exploration potential of the country. In 1999, the Minis
Authors
Richard J. Goldfarb, Erin E. Marsh, John D. Horton
The Kharapeh orogenic gold deposit: Geological, structural, and geochemical controls on epizonal ore formation in West Azerbaijan Province, Northwestern Iran
The Kharapeh gold deposit is located along the northwestern margin of the Sanandaj–Sirjan Zone (SSZ) in the West Azerbaijan province, Iran. It is an epizonal orogenic gold deposit formed within the deformed zone between central Iran and the Arabian plate during the Cretaceous–Tertiary Zagros orogeny. The deposit area is underlain by Cretaceous schist and marble, as well as altered andesite and dac
Authors
Shojaeddin Niroomand, Richard J. Goldfarb, Farib Moore, Mohammad Mohajjel, Erin E. Marsh
Ni-Co laterite deposits
Nickel-cobalt (Ni-Co) laterite deposits are an important source of nickel (Ni). Currently, there is a decline in magmatic Ni-bearing sulfide lode deposit resources. New efforts to develop an alternative source of Ni, particularly with improved metallurgy processes, make the Ni-Co laterites an important exploration target in anticipation of the future demand for Ni. This deposit model provides a ge
Authors
Erin E. Marsh, Eric D. Anderson
Book review: Geology of gem deposits
Geology of Gem Deposits is the most recent addition to the classic short course volumes published by the Mineralogical Association of Canada. Although not as comprehensive as the title might imply, this volume does contain overview papers devoted (in varying degrees) to the geology of diamond, beryl, corundum, chrysoberyl, tanzanite and tsarvorite, topaz, and jade deposits, as well as gem-bearing
Authors
Erin E. Marsh
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
Regional Fluid Flow and Basin Modeling in Northern Alaska
The foothills of the Brooks Range contain an enormous accumulation of zinc (Zn) in the form of zinc sulfide and barium (Ba) in the form of barite in Carboniferous shale, chert, and mudstone. Most of the resources and reserves of Zn occur in the Red Dog deposit and others in the Red Dog district; these resources and reserves surpass those of most deposits worldwide in terms of size and grade. In ad
Authors
Robert A. Ayuso, Robert Burruss, Julie A. Dumoulin, Garth E. Graham, Anita G. Harris, Craig A. Johnson, Karen D. Kelley, David L. Leach, Paul G. Lillis, Erin E. Marsh, Thomas E. Moore, Christopher J. Potter, John F. Slack
By
Ecosystems Mission Area, Energy Resources Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Geology, Energy & Minerals Science Center, Alaska Science Center, Geology, Geophysics, and Geochemistry Science Center, Geology, Minerals, Energy, and Geophysics Science Center, Central Energy Resources Science Center
Nature of hydrothermal fluids at the shale-hosted Red Dog Zn-Pb-Ag deposits, Brooks Range, Alaska
The Red Dog Zn-Pb-Ag district in the western Brooks Range, northern Alaska, contains numerous shale-hosted Zn-Pb sulfide and barite deposits in organic-rich siliceous mudstone and shale, chert, and carbonate rocks of the Carboniferous Kuna Formation. The giant Red Dog shale-hosted deposits consist of a cluster of four orebodies (Main, Qanaiyaq, Aqqaluk, and Paalaaq) that lie within distinct thrust
Authors
David L. Leach, Erin E. Marsh, Poul Emsbo, Cameron Rombach, Karen D. Kelley, Michael W. Anthony
The late cretaceous Donlin Creek gold deposit, Southwestern Alaska: Controls on epizonal ore formation
The Donlin Creek gold deposit, southwestern Alaska, has an indicated and inferred resource of approximately 25 million ounces (Moz) Au at a cutoff grade of 1.5 g/t. The ca. 70 Ma deposit is hosted in the Late Cretaceous Kuskokwim flysch basin, which developed in the back part of the arc region of an active continental margin, on previously accreted oceanic terranes and continental fragments. A hyp
Authors
Richard J. Goldfarb, Robert A. Ayuso, Marti L. Miller, Shane W. Ebert, Erin E. Marsh, Scott A. Petsel, Lance D. Miller, Dwight Bradley, Chad Johnson, William C. McClelland
Science and Products
Filter Total Items: 22
Nickel-cobalt laterites: a deposit model
Nickel-cobalt (Ni-Co) laterite deposits are supergene enrichments of Ni±Co that form from intense chemical and mechanical weathering of ultramafic parent rocks. These regolith deposits typically form within 26 degrees of the equator, although there are a few exceptions. They form in active continental margins and stable cratonic settings. It takes as little as one million years for a laterite prof
Authors
Erin E. Marsh, Eric D. Anderson, Floyd Gray
Mauritania – A greenfields exploration opportunity in northwestern Africa
No abstract available.
Authors
Cliff D. Taylor, E. D. Anderson, D. C. Bradley, G. Beaudoin, Michael A. Cosca, Robert G. Eppinger, Gregory L. Fernette, Carol A. Finn, Michael J. Friedel, Stuart A. Giles, Richard J. Goldfarb, John D. Horton, Gregory K. Lee, Erin E. Marsh, Jeffrey L. Mauk, Holly A. Motts, M. Y. Ould El Joud, S. Ould Soueidatt, A. Ould Taleb Mohamed, Barnaby W. Rockwell
Mineral potential tracts for orogenic, Carlin-like, and epithermal gold deposits in the Islamic Republic of Mauritania, (phase V, deliverable 68): Chapter H1 in Second projet de renforcement institutionnel du secteur minier de la République Islamique
In 1996, at the request of the Government of the Islamic Republic of Mauritania, a team of U.S. Geological Survey (USGS) scientists produced a strategic plan for the acquisition, improvement and modernization of multidisciplinary sets of data to support the growth of the Mauritanian minerals sector and to highlight the geological and mineral exploration potential of the country. In 1999, the Minis
Authors
Richard J. Goldfarb, Erin E. Marsh, John D. Horton
The Kharapeh orogenic gold deposit: Geological, structural, and geochemical controls on epizonal ore formation in West Azerbaijan Province, Northwestern Iran
The Kharapeh gold deposit is located along the northwestern margin of the Sanandaj–Sirjan Zone (SSZ) in the West Azerbaijan province, Iran. It is an epizonal orogenic gold deposit formed within the deformed zone between central Iran and the Arabian plate during the Cretaceous–Tertiary Zagros orogeny. The deposit area is underlain by Cretaceous schist and marble, as well as altered andesite and dac
Authors
Shojaeddin Niroomand, Richard J. Goldfarb, Farib Moore, Mohammad Mohajjel, Erin E. Marsh
Ni-Co laterite deposits
Nickel-cobalt (Ni-Co) laterite deposits are an important source of nickel (Ni). Currently, there is a decline in magmatic Ni-bearing sulfide lode deposit resources. New efforts to develop an alternative source of Ni, particularly with improved metallurgy processes, make the Ni-Co laterites an important exploration target in anticipation of the future demand for Ni. This deposit model provides a ge
Authors
Erin E. Marsh, Eric D. Anderson
Book review: Geology of gem deposits
Geology of Gem Deposits is the most recent addition to the classic short course volumes published by the Mineralogical Association of Canada. Although not as comprehensive as the title might imply, this volume does contain overview papers devoted (in varying degrees) to the geology of diamond, beryl, corundum, chrysoberyl, tanzanite and tsarvorite, topaz, and jade deposits, as well as gem-bearing
Authors
Erin E. Marsh
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
Regional Fluid Flow and Basin Modeling in Northern Alaska
The foothills of the Brooks Range contain an enormous accumulation of zinc (Zn) in the form of zinc sulfide and barium (Ba) in the form of barite in Carboniferous shale, chert, and mudstone. Most of the resources and reserves of Zn occur in the Red Dog deposit and others in the Red Dog district; these resources and reserves surpass those of most deposits worldwide in terms of size and grade. In ad
Authors
Robert A. Ayuso, Robert Burruss, Julie A. Dumoulin, Garth E. Graham, Anita G. Harris, Craig A. Johnson, Karen D. Kelley, David L. Leach, Paul G. Lillis, Erin E. Marsh, Thomas E. Moore, Christopher J. Potter, John F. Slack
By
Ecosystems Mission Area, Energy Resources Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Geology, Energy & Minerals Science Center, Alaska Science Center, Geology, Geophysics, and Geochemistry Science Center, Geology, Minerals, Energy, and Geophysics Science Center, Central Energy Resources Science Center
Nature of hydrothermal fluids at the shale-hosted Red Dog Zn-Pb-Ag deposits, Brooks Range, Alaska
The Red Dog Zn-Pb-Ag district in the western Brooks Range, northern Alaska, contains numerous shale-hosted Zn-Pb sulfide and barite deposits in organic-rich siliceous mudstone and shale, chert, and carbonate rocks of the Carboniferous Kuna Formation. The giant Red Dog shale-hosted deposits consist of a cluster of four orebodies (Main, Qanaiyaq, Aqqaluk, and Paalaaq) that lie within distinct thrust
Authors
David L. Leach, Erin E. Marsh, Poul Emsbo, Cameron Rombach, Karen D. Kelley, Michael W. Anthony
The late cretaceous Donlin Creek gold deposit, Southwestern Alaska: Controls on epizonal ore formation
The Donlin Creek gold deposit, southwestern Alaska, has an indicated and inferred resource of approximately 25 million ounces (Moz) Au at a cutoff grade of 1.5 g/t. The ca. 70 Ma deposit is hosted in the Late Cretaceous Kuskokwim flysch basin, which developed in the back part of the arc region of an active continental margin, on previously accreted oceanic terranes and continental fragments. A hyp
Authors
Richard J. Goldfarb, Robert A. Ayuso, Marti L. Miller, Shane W. Ebert, Erin E. Marsh, Scott A. Petsel, Lance D. Miller, Dwight Bradley, Chad Johnson, William C. McClelland