Heather A Lowers
Heather Lowers is a Research Geologist with the Geology, Geophysics, and Geochemistry Science Center.
Science and Products
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Preliminary analytical results for a mud sample collected from the LUSI Mud Volcano, Sidoarjo, East Java, Indonesia Preliminary analytical results for a mud sample collected from the LUSI Mud Volcano, Sidoarjo, East Java, Indonesia
On May 29, 2006, mud and gases began erupting unexpectedly from a vent 150 meters away from a hydrocarbon exploration well near Sidoarjo, East Java, Indonesia. The eruption, called the LUSI (Lumpur 'mud'-Sidoarjo) mud volcano, has continued since then at rates as high as 160,000 m3 per day. At the request of the United States Department of State, the U.S. Geological Survey (USGS) has...
Authors
Geoffrey S. Plumlee, Thomas J. Casadevall, Handoko T. Wibowo, Robert J. Rosenbauer, Craig A. Johnson, George N. Breit, Heather Lowers, Ruth E. Wolf, Philip L. Hageman, Harland L. Goldstein, Michael W. Anthony, Cyrus J. Berry, David L. Fey, Gregory P. Meeker, Suzette A. Morman
Chemistry, mineralogy, and petrology of amphibole in Mount St. Helens 2004-2006 dacite Chemistry, mineralogy, and petrology of amphibole in Mount St. Helens 2004-2006 dacite
Textural, compositional, and mineralogical data are reported and interpreted for a large population of clinoamphibole phenocrysts in 22 samples from the seven successive dacite spines erupted at Mount St. Helens between October 2004 and January 2006. Despite the uniformity in bulk composition of magma erupted since 2004, there is striking textural and compositional diversity among...
Authors
Carl R. Thornber, John S. Pallister, Heather Lowers, Michael C. Rowe, Charlie Mandeville, Gregory P. Meeker
Petrology of the 2004-2006 Mount St. Helens lava dome -- implications for magmatic plumbing and eruption triggering Petrology of the 2004-2006 Mount St. Helens lava dome -- implications for magmatic plumbing and eruption triggering
Eighteen years after dome-forming eruptions ended in 1986, and with little warning, Mount St. Helens began to erupt again in October 2004. During the ensuing two years, the volcano extruded more than 80×106 m3 of gas-poor, crystal-rich dacite lava. The 2004-6 dacite is remarkably uniform in bulk-rock composition and, at 65 percent SiO2 , among the richest in silica and most depleted in...
Authors
John S. Pallister, Carl R. Thornber, Katharine V. Cashman, Michael A. Clynne, Heather Lowers, Charlie Mandeville, Isabelle K. Brownfield, Gregory P. Meeker
Trace elements in hydrothermal quartz: Relationships to cathodoluminescent textures and insights into vein formation Trace elements in hydrothermal quartz: Relationships to cathodoluminescent textures and insights into vein formation
High-resolution electron microprobe maps show the distribution of Ti, Al, Ca, K, and Fe among quartz growth zones revealed by scanning electron microscope-cathodoluminescence (SEM-CL) from 12 hydrothermal ore deposits formed between ???100 and e1750 ??C. The maps clearly show the relationships between trace elements and CL intensity in quartz. Among all samples, no single trace element...
Authors
B.G. Rusk, H.A. Lowers, M.H. Reed
Development of lunar regolith simulant: From the macro to the micro Development of lunar regolith simulant: From the macro to the micro
[No abstract available]
Authors
H.A. Lowers, D. B. Stoeser, S. A. Wilson, G.P. Meeker
Combined EPMA and SHRIMP analyses of xenotime to interpret the geochronological record Combined EPMA and SHRIMP analyses of xenotime to interpret the geochronological record
[No abstract available]
Authors
H.A. Lowers, J. N. Aleinikoff, F.K. Mazdab
Compositional Data for Bengal Delta Sediment Collected from a Borehole at Rajoir, Bangladesh Compositional Data for Bengal Delta Sediment Collected from a Borehole at Rajoir, Bangladesh
Processes active within sediment of the Bengal basin 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 a borehole in the town of Rajoir, Rajoir upazila, Madaripur 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, Cyrus J. Berry, John W. Whitney
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
Science and Products
Filter Total Items: 32
No Result Found
Filter Total Items: 113
Preliminary analytical results for a mud sample collected from the LUSI Mud Volcano, Sidoarjo, East Java, Indonesia Preliminary analytical results for a mud sample collected from the LUSI Mud Volcano, Sidoarjo, East Java, Indonesia
On May 29, 2006, mud and gases began erupting unexpectedly from a vent 150 meters away from a hydrocarbon exploration well near Sidoarjo, East Java, Indonesia. The eruption, called the LUSI (Lumpur 'mud'-Sidoarjo) mud volcano, has continued since then at rates as high as 160,000 m3 per day. At the request of the United States Department of State, the U.S. Geological Survey (USGS) has...
Authors
Geoffrey S. Plumlee, Thomas J. Casadevall, Handoko T. Wibowo, Robert J. Rosenbauer, Craig A. Johnson, George N. Breit, Heather Lowers, Ruth E. Wolf, Philip L. Hageman, Harland L. Goldstein, Michael W. Anthony, Cyrus J. Berry, David L. Fey, Gregory P. Meeker, Suzette A. Morman
Chemistry, mineralogy, and petrology of amphibole in Mount St. Helens 2004-2006 dacite Chemistry, mineralogy, and petrology of amphibole in Mount St. Helens 2004-2006 dacite
Textural, compositional, and mineralogical data are reported and interpreted for a large population of clinoamphibole phenocrysts in 22 samples from the seven successive dacite spines erupted at Mount St. Helens between October 2004 and January 2006. Despite the uniformity in bulk composition of magma erupted since 2004, there is striking textural and compositional diversity among...
Authors
Carl R. Thornber, John S. Pallister, Heather Lowers, Michael C. Rowe, Charlie Mandeville, Gregory P. Meeker
Petrology of the 2004-2006 Mount St. Helens lava dome -- implications for magmatic plumbing and eruption triggering Petrology of the 2004-2006 Mount St. Helens lava dome -- implications for magmatic plumbing and eruption triggering
Eighteen years after dome-forming eruptions ended in 1986, and with little warning, Mount St. Helens began to erupt again in October 2004. During the ensuing two years, the volcano extruded more than 80×106 m3 of gas-poor, crystal-rich dacite lava. The 2004-6 dacite is remarkably uniform in bulk-rock composition and, at 65 percent SiO2 , among the richest in silica and most depleted in...
Authors
John S. Pallister, Carl R. Thornber, Katharine V. Cashman, Michael A. Clynne, Heather Lowers, Charlie Mandeville, Isabelle K. Brownfield, Gregory P. Meeker
Trace elements in hydrothermal quartz: Relationships to cathodoluminescent textures and insights into vein formation Trace elements in hydrothermal quartz: Relationships to cathodoluminescent textures and insights into vein formation
High-resolution electron microprobe maps show the distribution of Ti, Al, Ca, K, and Fe among quartz growth zones revealed by scanning electron microscope-cathodoluminescence (SEM-CL) from 12 hydrothermal ore deposits formed between ???100 and e1750 ??C. The maps clearly show the relationships between trace elements and CL intensity in quartz. Among all samples, no single trace element...
Authors
B.G. Rusk, H.A. Lowers, M.H. Reed
Development of lunar regolith simulant: From the macro to the micro Development of lunar regolith simulant: From the macro to the micro
[No abstract available]
Authors
H.A. Lowers, D. B. Stoeser, S. A. Wilson, G.P. Meeker
Combined EPMA and SHRIMP analyses of xenotime to interpret the geochronological record Combined EPMA and SHRIMP analyses of xenotime to interpret the geochronological record
[No abstract available]
Authors
H.A. Lowers, J. N. Aleinikoff, F.K. Mazdab
Compositional Data for Bengal Delta Sediment Collected from a Borehole at Rajoir, Bangladesh Compositional Data for Bengal Delta Sediment Collected from a Borehole at Rajoir, Bangladesh
Processes active within sediment of the Bengal basin 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 a borehole in the town of Rajoir, Rajoir upazila, Madaripur 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, Cyrus J. Berry, John W. Whitney
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