Bradley S Van Gosen
Brad Van Gosen is a Research Geologist with the Geology, Geophysics, and Geochemistry Science Center.
Science and Products
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Mineral resource of the month: talc
When most people think of talc, they probably think of talcum and baby powder. However, these uses of talc are quite minor compared to its wide variety of applications in manufacturing. The leading use of talc is in the production of ceramics, where it acts as a source of magnesium oxide, serves as a flux to reduce firing temperatures and improves thermal shock characteristics of the final product
Authors
Robert Virta, Brad Van Gosen
Mineralogy and Morphology of Amphiboles Observed in Soils and Rocks in El Dorado Hills, California
From the Executive Summary: At the request of the U.S. Environmental Protection Agency (USEPA), the U.S. Geological Survey (USGS) has conducted an independent study of amphiboles in rocks and soils in the El Dorado Hills, California, area. The purpose of this study is to investigate specific issues regarding the presence of 'naturally occurring asbestos' raised by an USEPA activity-based sampling
Authors
G.P. Meeker, H.A. Lowers, G.A. Swayze, B. S. Van Gosen, S. J. Sutley, I. K. Brownfield
Reported historic asbestos prospects and natural asbestos occurrences in the central United States
This map and its accompanying dataset provide information for 26 natural asbestos occurrences in the Central United States (U.S.), using descriptions found in the geologic literature. Data on location, mineralogy, geology, and relevant literature for each asbestos site are provided. Using the map and digital data in this report, the user can examine the distribution of previously reported asbestos
Authors
Bradley S. Van Gosen
Ultramafic-Hosted Talc-Magnesite Deposits
This presentation on the geology of ultramafic-hosted talc-magnesite deposits was given at the 42nd Forum on the Geology of Industrial Minerals, May 7-13, 2006, in Asheville, North Carolina (USA). Talc is a soft inert industrial mineral commodity commonly used as a component or filler in ceramic, paint, paper, plastic, roofing, and electrical applications. Ultramafic-hosted talc-magnesite deposits
Authors
Gilpin R. Robinson, Bradley S. Van Gosen, Nora K. Foley
A reconnaissance geochemical and mineralogical study of the Stanley uranium district, Custer County, central Idaho
No abstract available.
Authors
Bradley S. Van Gosen, Jane M. Hammarstrom, Robert G. Eppinger, Paul H. Briggs, James G. Crock, Allen L. Meier, Stephen J. Sutley, Peter M. Theodorakos, Philip L. Hageman
Preliminary integrated geologic map databases for the United States: Central states: Montana, Wyoming, Colorado, New Mexico, North Dakota, South Dakota, Nebraska, Kansas, Oklahoma, Texas, Iowa, Missouri, Arkansas, and Louisiana
The growth in the use of Geographic Information Systems (GIS) has highlighted the need for regional and national digital geologic maps attributed with age and lithology information. Such maps can be conveniently used to generate derivative maps for purposes including mineral-resource assessment, metallogenic studies, tectonic studies, and environmental research. This Open-File Report is a prelimin
Authors
Douglas B. Stoeser, Gregory N. Green, Laurie C. Morath, William D. Heran, Anna B. Wilson, David W. Moore, Bradley S. Van Gosen
Spatial databases for the geology of the northern Rocky Mountains — Idaho, Montana, and Washington
No abstract available.
Authors
Michael L. Zientek, Pamela D. Derkey, Robert J. Miller, J. Douglas Causey, Arthur A. Bookstrom, Mary H. Carlson, Gregory N. Green, Thomas P. Frost, David E. Boleneus, Karl V. Evans, Bradley S. Van Gosen, Anna B. Wilson, Jeremy C. Larsen, Helen Z. Kayser, William N. Kelley, Kenneth C. Assmus
Reported historic asbestos mines, historic asbestos prospects, and natural asbestos occurrences in the eastern United States
No abstract available.
Authors
Bradley S. Van Gosen
A USGS Study of Talc Deposits and Associated Amphibole Asbestos Within Mined Deposits of the Southern Death Valley Region, California
No abstract available.
Authors
Bradley S. Van Gosen, Heather Lowers, Stephen J. Sutley
Using the geologic setting of talc deposits as an indicator of amphibole asbestos content
This study examined commercial talc deposits in the U.S. and their amphibole-asbestos content. The study found that the talc-forming environment directly influenced the amphibole and amphibole-asbestos content of the talc deposit. Large talc districts in the U.S. have mined hydrothermal talcs that replaced dolostone. Hydrothermal talcs, created by siliceous fluids heated by magmas at depth, consis
Authors
B. S. Van Gosen, H.A. Lowers, S. J. Sutley, C. A. Gent
Reconnaissance study of the geology of U.S. vermiculite deposits: Are asbestos minerals common constituents?
Unusually high incidences of asbestos-related mortality and respiratory disease in the small town of Libby, Montana, have been linked to amphibole mineral fibers intergrown with the vermiculite deposits mined and milled near the town from 1923 to 1990. A study conducted by the U.S. Agency for Toxic Substances and Disease Registry concluded that mortality due to asbestosis in Libby mine and mill wo
Authors
Bradley S. Van Gosen, Heather Lowers, Alfred L. Bush, Gregory P. Meeker, Geoffrey S. Plumlee, Isabelle K. Brownfield, Stephen J. Sutley
Are asbestos minerals common in US vermiculite deposits?
No abstract available.
Authors
Bradley S. Van Gosen, Heather A. Lowers, Alfred L. Bush, Gregory P. Meeker, Geoffrey S. Plumlee, Isabelle K. Brownfield, Stephan J. Sutley
Science and Products
Filter Total Items: 15
No Result Found
Filter Total Items: 100
Mineral resource of the month: talc
When most people think of talc, they probably think of talcum and baby powder. However, these uses of talc are quite minor compared to its wide variety of applications in manufacturing. The leading use of talc is in the production of ceramics, where it acts as a source of magnesium oxide, serves as a flux to reduce firing temperatures and improves thermal shock characteristics of the final product
Authors
Robert Virta, Brad Van Gosen
Mineralogy and Morphology of Amphiboles Observed in Soils and Rocks in El Dorado Hills, California
From the Executive Summary: At the request of the U.S. Environmental Protection Agency (USEPA), the U.S. Geological Survey (USGS) has conducted an independent study of amphiboles in rocks and soils in the El Dorado Hills, California, area. The purpose of this study is to investigate specific issues regarding the presence of 'naturally occurring asbestos' raised by an USEPA activity-based sampling
Authors
G.P. Meeker, H.A. Lowers, G.A. Swayze, B. S. Van Gosen, S. J. Sutley, I. K. Brownfield
Reported historic asbestos prospects and natural asbestos occurrences in the central United States
This map and its accompanying dataset provide information for 26 natural asbestos occurrences in the Central United States (U.S.), using descriptions found in the geologic literature. Data on location, mineralogy, geology, and relevant literature for each asbestos site are provided. Using the map and digital data in this report, the user can examine the distribution of previously reported asbestos
Authors
Bradley S. Van Gosen
Ultramafic-Hosted Talc-Magnesite Deposits
This presentation on the geology of ultramafic-hosted talc-magnesite deposits was given at the 42nd Forum on the Geology of Industrial Minerals, May 7-13, 2006, in Asheville, North Carolina (USA). Talc is a soft inert industrial mineral commodity commonly used as a component or filler in ceramic, paint, paper, plastic, roofing, and electrical applications. Ultramafic-hosted talc-magnesite deposits
Authors
Gilpin R. Robinson, Bradley S. Van Gosen, Nora K. Foley
A reconnaissance geochemical and mineralogical study of the Stanley uranium district, Custer County, central Idaho
No abstract available.
Authors
Bradley S. Van Gosen, Jane M. Hammarstrom, Robert G. Eppinger, Paul H. Briggs, James G. Crock, Allen L. Meier, Stephen J. Sutley, Peter M. Theodorakos, Philip L. Hageman
Preliminary integrated geologic map databases for the United States: Central states: Montana, Wyoming, Colorado, New Mexico, North Dakota, South Dakota, Nebraska, Kansas, Oklahoma, Texas, Iowa, Missouri, Arkansas, and Louisiana
The growth in the use of Geographic Information Systems (GIS) has highlighted the need for regional and national digital geologic maps attributed with age and lithology information. Such maps can be conveniently used to generate derivative maps for purposes including mineral-resource assessment, metallogenic studies, tectonic studies, and environmental research. This Open-File Report is a prelimin
Authors
Douglas B. Stoeser, Gregory N. Green, Laurie C. Morath, William D. Heran, Anna B. Wilson, David W. Moore, Bradley S. Van Gosen
Spatial databases for the geology of the northern Rocky Mountains — Idaho, Montana, and Washington
No abstract available.
Authors
Michael L. Zientek, Pamela D. Derkey, Robert J. Miller, J. Douglas Causey, Arthur A. Bookstrom, Mary H. Carlson, Gregory N. Green, Thomas P. Frost, David E. Boleneus, Karl V. Evans, Bradley S. Van Gosen, Anna B. Wilson, Jeremy C. Larsen, Helen Z. Kayser, William N. Kelley, Kenneth C. Assmus
Reported historic asbestos mines, historic asbestos prospects, and natural asbestos occurrences in the eastern United States
No abstract available.
Authors
Bradley S. Van Gosen
A USGS Study of Talc Deposits and Associated Amphibole Asbestos Within Mined Deposits of the Southern Death Valley Region, California
No abstract available.
Authors
Bradley S. Van Gosen, Heather Lowers, Stephen J. Sutley
Using the geologic setting of talc deposits as an indicator of amphibole asbestos content
This study examined commercial talc deposits in the U.S. and their amphibole-asbestos content. The study found that the talc-forming environment directly influenced the amphibole and amphibole-asbestos content of the talc deposit. Large talc districts in the U.S. have mined hydrothermal talcs that replaced dolostone. Hydrothermal talcs, created by siliceous fluids heated by magmas at depth, consis
Authors
B. S. Van Gosen, H.A. Lowers, S. J. Sutley, C. A. Gent
Reconnaissance study of the geology of U.S. vermiculite deposits: Are asbestos minerals common constituents?
Unusually high incidences of asbestos-related mortality and respiratory disease in the small town of Libby, Montana, have been linked to amphibole mineral fibers intergrown with the vermiculite deposits mined and milled near the town from 1923 to 1990. A study conducted by the U.S. Agency for Toxic Substances and Disease Registry concluded that mortality due to asbestosis in Libby mine and mill wo
Authors
Bradley S. Van Gosen, Heather Lowers, Alfred L. Bush, Gregory P. Meeker, Geoffrey S. Plumlee, Isabelle K. Brownfield, Stephen J. Sutley
Are asbestos minerals common in US vermiculite deposits?
No abstract available.
Authors
Bradley S. Van Gosen, Heather A. Lowers, Alfred L. Bush, Gregory P. Meeker, Geoffrey S. Plumlee, Isabelle K. Brownfield, Stephan J. Sutley