George N Breit (Former Employee)
Science and Products
Filter Total Items: 41
Microplastic and associated black particles from road-tire wear: Implications for radiative effects across the cryosphere and in the atmosphere Microplastic and associated black particles from road-tire wear: Implications for radiative effects across the cryosphere and in the atmosphere
The environmental effects of airborne micro- and nano-size plastic particles are poorly understood. Microscopy and chemical analyses of atmospherically deposited particles on snow surfaces at high elevation (2,865–3,690 m) in the Upper Colorado River basin (UCRB; Colorado Rocky Mountains) revealed the presence of black substances intimately associated with microplastic fibers, particles...
Authors
Richard Reynolds, Heather Lowers, George N. Breit, Harland Goldstein, Elizabeth Williams, Corey Lawrence, Raymond Kokaly, Jeff Derry
Dust deposited on snow cover in the San Juan Mountains, Colorado, 2011-2016: Compositional variability bearing on snow-melt effects Dust deposited on snow cover in the San Juan Mountains, Colorado, 2011-2016: Compositional variability bearing on snow-melt effects
Light-absorbing particles in atmospheric dust deposited on snow cover (dust-on-snow, DOS) diminish albedo and accelerate the timing and rate of snow melt. Identification of these particles and their effects are relevant to snow-radiation modeling and thus water-resource management. Laboratory-measured reflectance of DOS samples from the San Juan Mountains (USA) were compared with DOS...
Authors
Richard Reynolds, Harland Goldstein, Bruce Moskowitz, Raymond Kokaly, Seth Munson, Peat Solheid, George Breit, Corey Lawrence, Jeff Derry
Pleistocene hydrothermal activity on Brokeoff volcano and in the Maidu volcanic center, Lassen Peak area, northeast California: Evolution of magmatic-hydrothermal systems on stratovolcanoes Pleistocene hydrothermal activity on Brokeoff volcano and in the Maidu volcanic center, Lassen Peak area, northeast California: Evolution of magmatic-hydrothermal systems on stratovolcanoes
Partially eroded stratovolcanoes worldwide, notably Mounts Rainier and Adams in the Cascades and several volcanoes in Japan, record episodic periods of eruption and geothermal activity that produce zones of hydrothermal alteration. The partly eroded core of late Pleistocene Brokeoff volcano on the south side of Lassen Peak exposes the upper 1 km of multiple ancient (ca. 410–300 ka)...
Authors
David John, Robert Lee, George Breit, John Dilles, Andrew Calvert, L.J. Muffler, Michael Clynne
Method to characterize inorganic particulates in lung tissue biopsies using field emission scanning electron microscopy Method to characterize inorganic particulates in lung tissue biopsies using field emission scanning electron microscopy
Humans accumulate large numbers of inorganic particles in their lungs over a lifetime. Whether this causes or contributes to debilitating disease over a normal lifespan depends on the type and concentration of the particles. We developed and tested a protocol for in situ characterization of the types and distribution of inorganic particles in biopsied lung tissue from three human groups...
Authors
Heather Lowers, George Breit, Matthew Strand, Renee Pillers, Gregory Meeker, Todor Todorov, Geoffrey Plumlee, Ruth E. Wolf, Maura Robinson, Jane Parr, Robert Miller, Steve Groshong, Francis Green, Cecile Rose
Controls on the chemical composition of saline surface crusts and emitted dust from a wet playa in the Mojave Desert (USA) Controls on the chemical composition of saline surface crusts and emitted dust from a wet playa in the Mojave Desert (USA)
Saline-surface crusts and their compositions at ephemeral, dry, and drying lakes are important products of arid-land processes. Detailed understanding is lacking, however, about interactions among locally variable hydrogeologic conditions, compositional control of groundwater on vadose zone and surface salts, and dust composition. Chemical and physical data from groundwater, sediments...
Authors
Harland Goldstein, George Breit, Richard L. Reynolds
Resource potential for commodities in addition to Uranium in sandstone-hosted deposits Resource potential for commodities in addition to Uranium in sandstone-hosted deposits
Sandstone-hosted deposits mined primarily for their uranium content also have been a source of vanadium and modest amounts of copper. Processing of these ores has also recovered small amounts of molybdenum, rhenium, rare earth elements, scandium, and selenium. These deposits share a generally common origin, but variations in the source of metals, composition of ore-forming solutions, and...
Authors
George Breit
Sedimentary exhalative (sedex) zinc-lead-silver deposit model Sedimentary exhalative (sedex) zinc-lead-silver deposit model
This report draws on previous syntheses and basic research studies of sedimentary exhalative (sedex) deposits to arrive at the defining criteria, both descriptive and genetic, for sedex-type deposits. Studies of the tectonic, sedimentary, and fluid evolution of modern and ancient sedimentary basins have also been used to select defining criteria. The focus here is on the geologic...
Authors
Poul Emsbo, Robert Seal, George Breit, Sharon Diehl, Anjana Shah
Discovery of alunite in Cross crater, Terra Sirenum, Mars: Evidence for acidic, sulfurous waters Discovery of alunite in Cross crater, Terra Sirenum, Mars: Evidence for acidic, sulfurous waters
Cross crater is a 65 km impact crater, located in the Noachian highlands of the Terra Sirenum region of Mars (30°S, 158°W), which hosts aluminum phyllosilicate deposits first detected by the Observatoire pour la Minéralogie, L’Eau, les Glaces et l’Activitié (OMEGA) imaging spectrometer on Mars Express. Using high-resolution data from the Mars Reconnaissance Orbiter, we examine Cross...
Authors
Bethany Ehlmann, Gregg Swayze, Ralph Milliken, John Mustard, Roger Clark, Scott Murchie, George N. Breit, James Wray, Brigitte Gondet, Francois Poulet, John Carter, Wendy Calvin, William Benzel, Kimberly Seelos
Assessment of undiscovered sandstone-hosted uranium resources in the Texas Coastal Plain, 2015 Assessment of undiscovered sandstone-hosted uranium resources in the Texas Coastal Plain, 2015
The U.S. Geological Survey estimated a mean of 220 million pounds of recoverable uranium oxide (U3O8 ) remaining as potential undiscovered resources in southern Texas. This estimate used a geology-based assessment method for Tertiary sandstone-hosted uranium deposits in the Texas Coastal Plain sedimentary strata (fig.1).
Authors
Mark Mihalasky, Susan Hall, Jane Hammarstrom, Kathleen R. Tureck, Mark Hannon, George Breit, Robert Zielinski, Brent Elliott
Rare earth elements in sedimentary phosphate deposits: Solution to the global REE crisis? Rare earth elements in sedimentary phosphate deposits: Solution to the global REE crisis?
The critical role of rare earth elements (REEs), particularly heavy REEs (HREEs), in high-tech industries has created a surge in demand that is quickly outstripping known global supply and has triggered a worldwide scramble to discover new sources. The chemical analysis of 23 sedimentary phosphate deposits (phosphorites) in the United States demonstrates that they are significantly...
Authors
Poul Emsbo, Patrick McLaughlin, George Breit, Edward du Bray, Alan Koenig
Weathering and transport of chromium and nickel from serpentinite in the Coast Range ophiolite to the Sacramento Valley, California, USA Weathering and transport of chromium and nickel from serpentinite in the Coast Range ophiolite to the Sacramento Valley, California, USA
A soil geochemical study in northern California was done to investigate the role that weathering and transport play in the regional distribution and mobility of geogenic Cr and Ni, which are both potentially toxic and carcinogenic. These elements are enriched in ultramafic rocks (primarily serpentinite) and the soils derived from them (1700–10,000 mg Cr per kg soil and 1300–3900 mg Ni...
Authors
Jean Morrison, Martin Goldhaber, Christopher T. Mills, George Breit, Robert Hooper, JoAnn Holloway, Sharon Diehl, James Ranville
Aeolian responses to climate variability during the past century on Mesquite Lake Playa, Mojave Desert Aeolian responses to climate variability during the past century on Mesquite Lake Playa, Mojave Desert
The erosion and deposition of sediments by wind from 1901 to 2013 have created large changes in surface features of Mesquite Lake playa in the Mojave Desert. The decadal scale recurrence of sand-sheet development, migration, and merging with older dunes appears related to decadal climatic changes of drought and wetness as recorded in the precipitation history of the Mojave Desert...
Authors
John Whitney, George Breit, S.E. Buckingham, Richard Reynolds, Rian C. Bogle, Lifeng Luo, Harland Goldstein, John Vogel
Science and Products
Filter Total Items: 41
Microplastic and associated black particles from road-tire wear: Implications for radiative effects across the cryosphere and in the atmosphere Microplastic and associated black particles from road-tire wear: Implications for radiative effects across the cryosphere and in the atmosphere
The environmental effects of airborne micro- and nano-size plastic particles are poorly understood. Microscopy and chemical analyses of atmospherically deposited particles on snow surfaces at high elevation (2,865–3,690 m) in the Upper Colorado River basin (UCRB; Colorado Rocky Mountains) revealed the presence of black substances intimately associated with microplastic fibers, particles...
Authors
Richard Reynolds, Heather Lowers, George N. Breit, Harland Goldstein, Elizabeth Williams, Corey Lawrence, Raymond Kokaly, Jeff Derry
Dust deposited on snow cover in the San Juan Mountains, Colorado, 2011-2016: Compositional variability bearing on snow-melt effects Dust deposited on snow cover in the San Juan Mountains, Colorado, 2011-2016: Compositional variability bearing on snow-melt effects
Light-absorbing particles in atmospheric dust deposited on snow cover (dust-on-snow, DOS) diminish albedo and accelerate the timing and rate of snow melt. Identification of these particles and their effects are relevant to snow-radiation modeling and thus water-resource management. Laboratory-measured reflectance of DOS samples from the San Juan Mountains (USA) were compared with DOS...
Authors
Richard Reynolds, Harland Goldstein, Bruce Moskowitz, Raymond Kokaly, Seth Munson, Peat Solheid, George Breit, Corey Lawrence, Jeff Derry
Pleistocene hydrothermal activity on Brokeoff volcano and in the Maidu volcanic center, Lassen Peak area, northeast California: Evolution of magmatic-hydrothermal systems on stratovolcanoes Pleistocene hydrothermal activity on Brokeoff volcano and in the Maidu volcanic center, Lassen Peak area, northeast California: Evolution of magmatic-hydrothermal systems on stratovolcanoes
Partially eroded stratovolcanoes worldwide, notably Mounts Rainier and Adams in the Cascades and several volcanoes in Japan, record episodic periods of eruption and geothermal activity that produce zones of hydrothermal alteration. The partly eroded core of late Pleistocene Brokeoff volcano on the south side of Lassen Peak exposes the upper 1 km of multiple ancient (ca. 410–300 ka)...
Authors
David John, Robert Lee, George Breit, John Dilles, Andrew Calvert, L.J. Muffler, Michael Clynne
Method to characterize inorganic particulates in lung tissue biopsies using field emission scanning electron microscopy Method to characterize inorganic particulates in lung tissue biopsies using field emission scanning electron microscopy
Humans accumulate large numbers of inorganic particles in their lungs over a lifetime. Whether this causes or contributes to debilitating disease over a normal lifespan depends on the type and concentration of the particles. We developed and tested a protocol for in situ characterization of the types and distribution of inorganic particles in biopsied lung tissue from three human groups...
Authors
Heather Lowers, George Breit, Matthew Strand, Renee Pillers, Gregory Meeker, Todor Todorov, Geoffrey Plumlee, Ruth E. Wolf, Maura Robinson, Jane Parr, Robert Miller, Steve Groshong, Francis Green, Cecile Rose
Controls on the chemical composition of saline surface crusts and emitted dust from a wet playa in the Mojave Desert (USA) Controls on the chemical composition of saline surface crusts and emitted dust from a wet playa in the Mojave Desert (USA)
Saline-surface crusts and their compositions at ephemeral, dry, and drying lakes are important products of arid-land processes. Detailed understanding is lacking, however, about interactions among locally variable hydrogeologic conditions, compositional control of groundwater on vadose zone and surface salts, and dust composition. Chemical and physical data from groundwater, sediments...
Authors
Harland Goldstein, George Breit, Richard L. Reynolds
Resource potential for commodities in addition to Uranium in sandstone-hosted deposits Resource potential for commodities in addition to Uranium in sandstone-hosted deposits
Sandstone-hosted deposits mined primarily for their uranium content also have been a source of vanadium and modest amounts of copper. Processing of these ores has also recovered small amounts of molybdenum, rhenium, rare earth elements, scandium, and selenium. These deposits share a generally common origin, but variations in the source of metals, composition of ore-forming solutions, and...
Authors
George Breit
Sedimentary exhalative (sedex) zinc-lead-silver deposit model Sedimentary exhalative (sedex) zinc-lead-silver deposit model
This report draws on previous syntheses and basic research studies of sedimentary exhalative (sedex) deposits to arrive at the defining criteria, both descriptive and genetic, for sedex-type deposits. Studies of the tectonic, sedimentary, and fluid evolution of modern and ancient sedimentary basins have also been used to select defining criteria. The focus here is on the geologic...
Authors
Poul Emsbo, Robert Seal, George Breit, Sharon Diehl, Anjana Shah
Discovery of alunite in Cross crater, Terra Sirenum, Mars: Evidence for acidic, sulfurous waters Discovery of alunite in Cross crater, Terra Sirenum, Mars: Evidence for acidic, sulfurous waters
Cross crater is a 65 km impact crater, located in the Noachian highlands of the Terra Sirenum region of Mars (30°S, 158°W), which hosts aluminum phyllosilicate deposits first detected by the Observatoire pour la Minéralogie, L’Eau, les Glaces et l’Activitié (OMEGA) imaging spectrometer on Mars Express. Using high-resolution data from the Mars Reconnaissance Orbiter, we examine Cross...
Authors
Bethany Ehlmann, Gregg Swayze, Ralph Milliken, John Mustard, Roger Clark, Scott Murchie, George N. Breit, James Wray, Brigitte Gondet, Francois Poulet, John Carter, Wendy Calvin, William Benzel, Kimberly Seelos
Assessment of undiscovered sandstone-hosted uranium resources in the Texas Coastal Plain, 2015 Assessment of undiscovered sandstone-hosted uranium resources in the Texas Coastal Plain, 2015
The U.S. Geological Survey estimated a mean of 220 million pounds of recoverable uranium oxide (U3O8 ) remaining as potential undiscovered resources in southern Texas. This estimate used a geology-based assessment method for Tertiary sandstone-hosted uranium deposits in the Texas Coastal Plain sedimentary strata (fig.1).
Authors
Mark Mihalasky, Susan Hall, Jane Hammarstrom, Kathleen R. Tureck, Mark Hannon, George Breit, Robert Zielinski, Brent Elliott
Rare earth elements in sedimentary phosphate deposits: Solution to the global REE crisis? Rare earth elements in sedimentary phosphate deposits: Solution to the global REE crisis?
The critical role of rare earth elements (REEs), particularly heavy REEs (HREEs), in high-tech industries has created a surge in demand that is quickly outstripping known global supply and has triggered a worldwide scramble to discover new sources. The chemical analysis of 23 sedimentary phosphate deposits (phosphorites) in the United States demonstrates that they are significantly...
Authors
Poul Emsbo, Patrick McLaughlin, George Breit, Edward du Bray, Alan Koenig
Weathering and transport of chromium and nickel from serpentinite in the Coast Range ophiolite to the Sacramento Valley, California, USA Weathering and transport of chromium and nickel from serpentinite in the Coast Range ophiolite to the Sacramento Valley, California, USA
A soil geochemical study in northern California was done to investigate the role that weathering and transport play in the regional distribution and mobility of geogenic Cr and Ni, which are both potentially toxic and carcinogenic. These elements are enriched in ultramafic rocks (primarily serpentinite) and the soils derived from them (1700–10,000 mg Cr per kg soil and 1300–3900 mg Ni...
Authors
Jean Morrison, Martin Goldhaber, Christopher T. Mills, George Breit, Robert Hooper, JoAnn Holloway, Sharon Diehl, James Ranville
Aeolian responses to climate variability during the past century on Mesquite Lake Playa, Mojave Desert Aeolian responses to climate variability during the past century on Mesquite Lake Playa, Mojave Desert
The erosion and deposition of sediments by wind from 1901 to 2013 have created large changes in surface features of Mesquite Lake playa in the Mojave Desert. The decadal scale recurrence of sand-sheet development, migration, and merging with older dunes appears related to decadal climatic changes of drought and wetness as recorded in the precipitation history of the Mojave Desert...
Authors
John Whitney, George Breit, S.E. Buckingham, Richard Reynolds, Rian C. Bogle, Lifeng Luo, Harland Goldstein, John Vogel