Heather A Lowers
Heather Lowers is a Research Geologist with the Geology, Geophysics, and Geochemistry Science Center.
Science and Products
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Iron Hill (Powderhorn) carbonatite complex, Gunnison County, CO - A potential source of several uncommon mineral resources Iron Hill (Powderhorn) carbonatite complex, Gunnison County, CO - A potential source of several uncommon mineral resources
The Iron Hill (Powderhorn) carbonatite complex is a 31-kM2 (12-sq mile) alkalic intrusion located about 35 km (22 miles) south-southwest of Gunnison, CO. The intrusion has been well studied and described because of its classic petrology and architecture ofa carbonatite-alkalic complex. The complex is also noteworthy because it contains enrichments of titanium, rare earth elements...
Authors
B. S. Van Gosen, H.A. Lowers
Arsenic incorporation into authigenic pyrite, Bengal Basin sediment, Bangladesh Arsenic incorporation into authigenic pyrite, Bengal Basin sediment, Bangladesh
Sediment from two deep boreholes (∼400 m) approximately 90 km apart in southern Bangladesh was analyzed by X-ray absorption spectroscopy (XAS), total chemical analyses, chemical extractions, and electron probe microanalysis to establish the importance of authigenic pyrite as a sink for arsenic in the Bengal Basin. Authigenic framboidal and massive pyrite (median values 1500 and 3200 ppm...
Authors
Heather A. Lowers, George N. Breit, Andrea L. Foster, John W. Whitney, James Yount, Nehal Uddin, Ad. Atual Muneem
Mineralogy and Morphology of Amphiboles Observed in Soils and Rocks in El Dorado Hills, California 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...
Authors
G.P. Meeker, H.A. Lowers, G.A. Swayze, B. S. Van Gosen, S. J. Sutley, I. K. Brownfield
Compositional data for Bengal delta sediment collected from boreholes at Srirampur, Kachua, Bangladesh Compositional data for Bengal delta sediment collected from boreholes at Srirampur, Kachua, Bangladesh
Processes active within sediment of the Bengal delta have attracted world concern because of the locally high content of arsenic dissolved in ground water drawn from that sediment. Sediment samples were collected from two boreholes in Srirampur village, Kachua upazila, Chandphur district, Bangladesh, to investigate the processes contributing to arsenic contamination. The samples were
Authors
George N. Breit, James C. Yount, Nehal Uddin, Ad. Atual Muneem, Heather Lowers, Rhonda L. Driscoll, John W. Whitney
The use of synthetic jarosite as an analog for natural jarosite 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...
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
Science and Products
Filter Total Items: 31
No Result Found
Filter Total Items: 106
Iron Hill (Powderhorn) carbonatite complex, Gunnison County, CO - A potential source of several uncommon mineral resources Iron Hill (Powderhorn) carbonatite complex, Gunnison County, CO - A potential source of several uncommon mineral resources
The Iron Hill (Powderhorn) carbonatite complex is a 31-kM2 (12-sq mile) alkalic intrusion located about 35 km (22 miles) south-southwest of Gunnison, CO. The intrusion has been well studied and described because of its classic petrology and architecture ofa carbonatite-alkalic complex. The complex is also noteworthy because it contains enrichments of titanium, rare earth elements...
Authors
B. S. Van Gosen, H.A. Lowers
Arsenic incorporation into authigenic pyrite, Bengal Basin sediment, Bangladesh Arsenic incorporation into authigenic pyrite, Bengal Basin sediment, Bangladesh
Sediment from two deep boreholes (∼400 m) approximately 90 km apart in southern Bangladesh was analyzed by X-ray absorption spectroscopy (XAS), total chemical analyses, chemical extractions, and electron probe microanalysis to establish the importance of authigenic pyrite as a sink for arsenic in the Bengal Basin. Authigenic framboidal and massive pyrite (median values 1500 and 3200 ppm...
Authors
Heather A. Lowers, George N. Breit, Andrea L. Foster, John W. Whitney, James Yount, Nehal Uddin, Ad. Atual Muneem
Mineralogy and Morphology of Amphiboles Observed in Soils and Rocks in El Dorado Hills, California 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...
Authors
G.P. Meeker, H.A. Lowers, G.A. Swayze, B. S. Van Gosen, S. J. Sutley, I. K. Brownfield
Compositional data for Bengal delta sediment collected from boreholes at Srirampur, Kachua, Bangladesh Compositional data for Bengal delta sediment collected from boreholes at Srirampur, Kachua, Bangladesh
Processes active within sediment of the Bengal delta have attracted world concern because of the locally high content of arsenic dissolved in ground water drawn from that sediment. Sediment samples were collected from two boreholes in Srirampur village, Kachua upazila, Chandphur district, Bangladesh, to investigate the processes contributing to arsenic contamination. The samples were
Authors
George N. Breit, James C. Yount, Nehal Uddin, Ad. Atual Muneem, Heather Lowers, Rhonda L. Driscoll, John W. Whitney
The use of synthetic jarosite as an analog for natural jarosite 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...
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