Heather A Lowers
Heather Lowers is a Research Geologist with the Geology, Geophysics, and Geochemistry Science Center.
Science and Products
Filter Total Items: 31
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Filter Total Items: 106
Not-so-routine electron probe microanalyses of jarosite 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 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...
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 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 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 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...
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 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...
Authors
M. E. Gunter, E. Singleton, B.R. Bandli, H.A. Lowers, G.P. Meeker
Science and Products
Filter Total Items: 31
No Result Found
Filter Total Items: 106
Not-so-routine electron probe microanalyses of jarosite 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 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...
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 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 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 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...
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 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...
Authors
M. E. Gunter, E. Singleton, B.R. Bandli, H.A. Lowers, G.P. Meeker