Heather A Lowers
Heather Lowers is a Research Geologist with the Geology, Geophysics, and Geochemistry Science Center.
Science and Products
Filter Total Items: 24
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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
Analytical error in the identification of fibrous and asbestiform amphiboles: Implications for the analytical and regulatory communities
[No abstract available]
Authors
G.P. Meeker, H.A. Lowers
Chapter 8 Petrogenesis and mineralogic residence of selected elements in the meade peak phosphatic shale member of the permian phosphoria formation, Southeast Idaho
The Meade Peak Phosphatic Shale Member of the Permian Phosphoria Formation hosts the ore mined by the phosphate industry of southeast Idaho. It also hosts environmentally sensitive elements (ESE) such as Se, As, Hg, Ni, Cd, Zn, and Cr. Primary chemistry, elemental distribution patterns, and mineralogy within the Meade Peak were modified by element migration and possibly the introduction of element
Authors
Richard I. Grauch, George A. Desborough, Gregory P. Meeker, A. L. Foster, Russell G. Tysdal, J. R. Herring, Heather A. Lowers, B. A. Ball, Robert A. Zielinski, E. A. Johnson
Electron probe microanalysis as a tool for identifying vermiculite sources
[No abstract available]
Authors
H.A. Lowers, G.P. Meeker
The composition and morphology of amphiboles from the Rainy Creek complex, near Libby, Montana
Thirty samples of amphibole-rich rock from the largest mined vermiculite deposit in the world in the Rainy Creek alkaline-ultramafic complex near Libby, Montana, were collected and analyzed. The amphibole-rich rock is the suspected cause of an abnormally high number of asbestos-related diseases reported in the residents of Libby, and in former mine and mill workers. The amphibole-rich samples were
Authors
G.P. Meeker, A.M. Bern, I. K. Brownfield, H.A. Lowers, S. J. Sutley, T.M. Hoefen, J.S. Vance
Tabulation of asbestos-related terminology
The term asbestos has been defined in numerous publications including many State and Federal regulations. The definition of asbestos often varies depending on the source or publication in which it is used. Differences in definitions also exist for the asbestos-related terms acicular, asbestiform, cleavage, cleavage fragment, fiber, fibril, fibrous, and parting. An inexperienced reader of the asbes
Authors
Heather Lowers, Greg Meeker
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: 24
No Result Found
Filter Total Items: 92
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
Analytical error in the identification of fibrous and asbestiform amphiboles: Implications for the analytical and regulatory communities
[No abstract available]
Authors
G.P. Meeker, H.A. Lowers
Chapter 8 Petrogenesis and mineralogic residence of selected elements in the meade peak phosphatic shale member of the permian phosphoria formation, Southeast Idaho
The Meade Peak Phosphatic Shale Member of the Permian Phosphoria Formation hosts the ore mined by the phosphate industry of southeast Idaho. It also hosts environmentally sensitive elements (ESE) such as Se, As, Hg, Ni, Cd, Zn, and Cr. Primary chemistry, elemental distribution patterns, and mineralogy within the Meade Peak were modified by element migration and possibly the introduction of element
Authors
Richard I. Grauch, George A. Desborough, Gregory P. Meeker, A. L. Foster, Russell G. Tysdal, J. R. Herring, Heather A. Lowers, B. A. Ball, Robert A. Zielinski, E. A. Johnson
Electron probe microanalysis as a tool for identifying vermiculite sources
[No abstract available]
Authors
H.A. Lowers, G.P. Meeker
The composition and morphology of amphiboles from the Rainy Creek complex, near Libby, Montana
Thirty samples of amphibole-rich rock from the largest mined vermiculite deposit in the world in the Rainy Creek alkaline-ultramafic complex near Libby, Montana, were collected and analyzed. The amphibole-rich rock is the suspected cause of an abnormally high number of asbestos-related diseases reported in the residents of Libby, and in former mine and mill workers. The amphibole-rich samples were
Authors
G.P. Meeker, A.M. Bern, I. K. Brownfield, H.A. Lowers, S. J. Sutley, T.M. Hoefen, J.S. Vance
Tabulation of asbestos-related terminology
The term asbestos has been defined in numerous publications including many State and Federal regulations. The definition of asbestos often varies depending on the source or publication in which it is used. Differences in definitions also exist for the asbestos-related terms acicular, asbestiform, cleavage, cleavage fragment, fiber, fibril, fibrous, and parting. An inexperienced reader of the asbes
Authors
Heather Lowers, Greg Meeker
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