Heather A Lowers
Heather Lowers is a Research Geologist with the Geology, Geophysics, and Geochemistry Science Center.
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The use of synthetic jarosite as an analog for natural jarosite
The presence of jarosite in soil or mining waste is an indicator of acidic sulfate-rich conditions. Physical and chemical properties of synthetic jarosites are commonly used as analogs in laboratory studies to determine solubility and acid-generation of naturally occurring jarosites. In our work we have mineralogically and chemically characterized both natural and synthetic jarosites. Analysis of
Authors
George A. Desborough, Kathleen S. Smith, Heather A. Lowers, Gregg A. Swayze, Jane M. Hammarstrom, Sharon F. Diehl, Rhonda L. Driscoll, Reinhard W. Leinz
Relationship between quartz trace elements and SEM-Cathodoluminescence textures revealed using WDS mapping techniques
[No abstract available]
Authors
H.A. Lowers, B.G. Rusk
Not-so-routine electron probe microanalyses of jarosite
No abstract available.
Authors
Heather Lowers, George A. Desborough, Jane M. Hammarstrom, Gregg A. Swayze, Kathleen S. Smith, Sharon F. Diehl
Particle atlas of World Trade Center dust
The United States Environmental Protection Agency (EPA) has begun a reassessment of the presence of World Trade Center (WTC) dust in residences, public buildings, and office spaces in New York City, New York. Background dust samples collected from residences, public buildings, and office spaces will be analyzed by multiple laboratories for the presence of WTC dust. Other laboratories are currently
Authors
Heather Lowers, Gregory P. Meeker
Analysis of background residential dust for World Trade Center signature components using scanning electron microscopy and x-ray microanalysis
No abstract available.
Authors
Heather Lowers, Gregory P. Meeker, Isabelle K. Brownfield
Determination of a diagnostic signature for World Trade Center dust using scanning electron microscopy point counting techniques
No abstract available.
Authors
Gregory P. Meeker, Amy M. Bern, Heather Lowers, Isabelle K. Brownfield
The composition of coexisting jarosite-group minerals and water from the Richmond mine, Iron Mountain, California
Jarosite-group minerals accumulate in the form of stalactites and fine-grained mud on massive pyrite in the D drift of the Richmond mine, Iron Mountain, California. Water samples were collected by placing beakers under the dripping stalactites and by extracting pore water from the mud using a centrifuge. The water is rich in Fe3+ and SO4 2−, with a pH of approximately 2.1, which is significantly h
Authors
Heather E. Jamieson, Clare Robinson, Charles N. Alpers, D. Kirk Nordstrom, Alexei Poustovetov, Heather A. Lowers
Differentiation of commercial vermiculite based on statistical analysis of bulk chemical data: Fingerprinting vermiculite from Libby, Montana U.S.A
Major-, minor-, and trace-element compositions, as determined by X-ray fluorescence (XRF) analysis, were obtained on 34 samples of vermiculite to ascertain whether chemical differences exist to the extent of determining the source of commercial products. The sample set included ores from four deposits, seven commercially available garden products, and insulation from four attics. The trace-element
Authors
M. E. Gunter, E. Singleton, B.R. Bandli, H.A. Lowers, G.P. Meeker
Questa baseline and pre-mining ground-water quality invistigation. 13. Mineral microscopy and chemistry of mined and unmined porphyry molybdenum mineralization along the Red River, New Mexico: Implications for ground- and surface-water quality
This report is one in a series presenting results of an interdisciplinary U.S. Geological Survey (USGS) study of ground-water quality in the lower Red River watershed prior to open-pit and underground molybdenite mining at Molycorp's Questa mine. The stretch of the Red River watershed that extends from just upstream of the town of Red River to just above the town of Questa includes several mineral
Authors
Geoff Plumlee, Heather Lowers, Steve Ludington, Alan Koenig, Paul Briggs
By
Water Resources Mission Area, Ecosystems Mission Area, Mineral Resources Program, Toxic Substances Hydrology, Environmental Health Program, Geology, Geophysics, and Geochemistry Science Center, Geology, Minerals, Energy, and Geophysics Science Center, New Mexico Water Science Center, Denver Microbeam Laboratory
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
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
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
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The use of synthetic jarosite as an analog for natural jarosite
The presence of jarosite in soil or mining waste is an indicator of acidic sulfate-rich conditions. Physical and chemical properties of synthetic jarosites are commonly used as analogs in laboratory studies to determine solubility and acid-generation of naturally occurring jarosites. In our work we have mineralogically and chemically characterized both natural and synthetic jarosites. Analysis ofAuthorsGeorge A. Desborough, Kathleen S. Smith, Heather A. Lowers, Gregg A. Swayze, Jane M. Hammarstrom, Sharon F. Diehl, Rhonda L. Driscoll, Reinhard W. LeinzRelationship between quartz trace elements and SEM-Cathodoluminescence textures revealed using WDS mapping techniques
[No abstract available]AuthorsH.A. Lowers, B.G. RuskNot-so-routine electron probe microanalyses of jarosite
No abstract available.AuthorsHeather Lowers, George A. Desborough, Jane M. Hammarstrom, Gregg A. Swayze, Kathleen S. Smith, Sharon F. DiehlParticle atlas of World Trade Center dust
The United States Environmental Protection Agency (EPA) has begun a reassessment of the presence of World Trade Center (WTC) dust in residences, public buildings, and office spaces in New York City, New York. Background dust samples collected from residences, public buildings, and office spaces will be analyzed by multiple laboratories for the presence of WTC dust. Other laboratories are currentlyAuthorsHeather Lowers, Gregory P. MeekerAnalysis of background residential dust for World Trade Center signature components using scanning electron microscopy and x-ray microanalysis
No abstract available.AuthorsHeather Lowers, Gregory P. Meeker, Isabelle K. BrownfieldDetermination of a diagnostic signature for World Trade Center dust using scanning electron microscopy point counting techniques
No abstract available.AuthorsGregory P. Meeker, Amy M. Bern, Heather Lowers, Isabelle K. BrownfieldThe composition of coexisting jarosite-group minerals and water from the Richmond mine, Iron Mountain, California
Jarosite-group minerals accumulate in the form of stalactites and fine-grained mud on massive pyrite in the D drift of the Richmond mine, Iron Mountain, California. Water samples were collected by placing beakers under the dripping stalactites and by extracting pore water from the mud using a centrifuge. The water is rich in Fe3+ and SO4 2−, with a pH of approximately 2.1, which is significantly hAuthorsHeather E. Jamieson, Clare Robinson, Charles N. Alpers, D. Kirk Nordstrom, Alexei Poustovetov, Heather A. LowersDifferentiation of commercial vermiculite based on statistical analysis of bulk chemical data: Fingerprinting vermiculite from Libby, Montana U.S.A
Major-, minor-, and trace-element compositions, as determined by X-ray fluorescence (XRF) analysis, were obtained on 34 samples of vermiculite to ascertain whether chemical differences exist to the extent of determining the source of commercial products. The sample set included ores from four deposits, seven commercially available garden products, and insulation from four attics. The trace-elementAuthorsM. E. Gunter, E. Singleton, B.R. Bandli, H.A. Lowers, G.P. MeekerQuesta baseline and pre-mining ground-water quality invistigation. 13. Mineral microscopy and chemistry of mined and unmined porphyry molybdenum mineralization along the Red River, New Mexico: Implications for ground- and surface-water quality
This report is one in a series presenting results of an interdisciplinary U.S. Geological Survey (USGS) study of ground-water quality in the lower Red River watershed prior to open-pit and underground molybdenite mining at Molycorp's Questa mine. The stretch of the Red River watershed that extends from just upstream of the town of Red River to just above the town of Questa includes several mineralAuthorsGeoff Plumlee, Heather Lowers, Steve Ludington, Alan Koenig, Paul BriggsByWater Resources Mission Area, Ecosystems Mission Area, Mineral Resources Program, Toxic Substances Hydrology, Environmental Health Program, Geology, Geophysics, and Geochemistry Science Center, Geology, Minerals, Energy, and Geophysics Science Center, New Mexico Water Science Center, Denver Microbeam LaboratoryA USGS Study of Talc Deposits and Associated Amphibole Asbestos Within Mined Deposits of the Southern Death Valley Region, California
No abstract available.AuthorsBradley S. Van Gosen, Heather Lowers, Stephen J. SutleyChapter 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 elementAuthorsRichard 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. JohnsonUsing 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, consisAuthorsB. S. Van Gosen, H.A. Lowers, S. J. Sutley, C. A. Gent - News