Bradley S Van Gosen
Brad Van Gosen is a Research Geologist with the Geology, Geophysics, and Geochemistry Science Center.
Science and Products
Filter Total Items: 15
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The rare-earth elements: Vital to modern technologies and lifestyles
Until recently, the rare-earth elements (REEs) were familiar to a relatively small number of people, such as chemists, geologists, specialized materials scientists, and engineers. In the 21st century, the REEs have gained visibility through many media outlets because of (1) the public has recognized the critical, specialized properties that REEs contribute to modern technology, as well as (2) Chin
Authors
Bradley S. Van Gosen, Philip L. Verplanck, Keith R. Long, Joseph Gambogi, Robert R. Seal
Deposit model for heavy-mineral sands in coastal environments
This report provides a descriptive model of heavy-mineral sands, which are sedimentary deposits of dense minerals that accumulate with sand, silt, and clay in coastal environments, locally forming economic concentrations of the heavy minerals. This deposit type is the main source of titanium feedstock for the titanium dioxide (TiO2) pigments industry, through recovery of the minerals ilmenite (Fe2
Authors
Bradley S. Van Gosen, David L. Fey, Anjana K. Shah, Philip L. Verplanck, Todd M. Hoefen
Characterization of Lone Pine, California, tremolite asbestos and preparation of research material
Well-characterized amphibole asbestos mineral samples are required for use as analytical standards and in future research projects. Currently, the National Institute for Standards and Technology Standard Reference Material samples of asbestos are listed as ‘Discontinued’. The National Institute for Occupational Safety and Health (NIOSH) has a goal under the Asbestos Roadmap of locating and charact
Authors
Martin Harper, Bradley S. Van Gosen, Owen S Crankshaw, Stacy S Doorn, J. Todd Ennis, Sara E Harrison
Mineral resource of the month: Wollastonite
Wollastonite, a calcium metasilicate, has an ideal composition of 48.3 percent calcium oxide and 51.7 percent silicon dioxide, but it can also contain minor amounts of aluminum, iron, magnesium, manganese, potassium, sodium or strontium substituting for calcium. Wollastonite occurs as prismatic crystals that break into tabular-to-acicular fragments. It is usually white but also may be gray, cream,
Authors
Robert L. Virta, Bradley S. Van Gosen
A deposit model for carbonatite and peralkaline intrusion-related rare earth element deposits
Carbonatite and alkaline intrusive complexes, as well as their weathering products, are the primary sources of rare earth elements. A wide variety of other commodities have been exploited from carbonatites and alkaline igneous rocks including niobium, phosphate, titanium, vermiculite, barite, fluorite, copper, calcite, and zirconium. Other elements enriched in these deposits include manganese, str
Authors
Philip L. Verplanck, Bradley S. Van Gosen, Robert R. Seal, Anne E. McCafferty
Mineral Resource of the Month: Talc
When people think of talc, they often think of talcum and baby powder. However, these uses of talc are minor compared to its use in industrial manufacturing. The leading use of talc in the United States is in the production of ceramics, where it is a source of magnesium oxide, serves as a flux to reduce firing temperatures, and improves thermal shock characteristics of the final product. Worldwide
Authors
Robert L. Virta, Bradley S. Van Gosen
Geophysical interpretation of U, Th, and rare earth element mineralization of the Bokan Mountain peralkaline granite complex, Prince of Wales Island, southeast Alaska
A prospectivity map for rare earth element (REE) mineralization at the Bokan Mountain peralkaline granite complex, Prince of Wales Island, southeastern Alaska, was calculated from high-resolution airborne gamma-ray data. The map displays areas with similar radioelement concentrations as those over the Dotson REE-vein-dike system, which is characterized by moderately high %K, eU, and eTh (%K, perce
Authors
Anne E. McCafferty, Douglas B. Stoeser, Bradley S. Van Gosen
Geologic occurrences of erionite in the United States: an emerging national public health concern for respiratory disease
Erionite, a mineral series within the zeolite group, is classified as a Group 1 known respiratory carcinogen. This designation resulted from extremely high incidences of mesothelioma discovered in three small villages from the Cappadocia region of Turkey, where the disease was linked to environmental exposures to fibrous forms of erionite. Natural deposits of erionite, including fibrous forms, hav
Authors
Bradley S. Van Gosen, Thomas A. Blitz, Geoffrey S. Plumlee, Gregory P. Meeker, M. Patrick Pierson
Alaska's rare earth deposits and resource potential
Alaska’s known mineral endowment includes some of the largest and highest grade deposits of various metals, including gold, copper and zinc. Recently, Alaska has also been active in the worldwide search for sources of rare earth elements (REE) to replace exports now being limitedby China. Driven by limited supply of the rare earths, combined with their increasing use in new ‘green’ energy, lightin
Authors
James C. Barker, Bradley S. Van Gosen
The principal rare earth elements deposits of the United States: A summary of domestic deposits and a global perspective
Demand for the rare earth elements (REE, lanthanide elements) is estimated to be increasing at a rate of about 8% per year due to increasing applications in consumer products, computers, automobiles, aircraft, and other advanced technology products. Much of this demand growth is driven by new technologies that increase energy efficiency and substitute away from fossil fuels. Production of these el
Authors
Keith R. Long, Bradley S. Van Gosen, Nora K. Foley, Daniel Cordier
Data report for the geologic and scenic quality evaluation of selected sand and gravel sites on the Wind River Indian Reservation, Wyoming
In April 2005, the U.S. Geological Survey (USGS) conducted field studies on the Wind River Indian Reservation, Wyoming, to inventory and evaluate sand and gravel deposits underlying river terraces on tribal lands along the Wind River. This report contains the results for 12 sites of sand and gravel deposits evaluated for their potential use as aggregate in Portland cement concrete, asphalt, and ba
Authors
William H. Langer, Bradley S. Van Gosen, Belinda Arbogast, David A. Lindsey
Carbonatite and alkaline intrusion-related rare earth element deposits–A deposit model
The rare earth elements are not as rare in nature as their name implies, but economic deposits with these elements are not common and few deposits have been large producers. In the past 25 years, demand for rare earth elements has increased dramatically because of their wide and diverse use in high-technology applications. Yet, presently the global production and supply of rare earth elements come
Authors
Philip L. Verplanck, Bradley S. Van Gosen
Science and Products
Filter Total Items: 15
No Result Found
Filter Total Items: 100
The rare-earth elements: Vital to modern technologies and lifestyles
Until recently, the rare-earth elements (REEs) were familiar to a relatively small number of people, such as chemists, geologists, specialized materials scientists, and engineers. In the 21st century, the REEs have gained visibility through many media outlets because of (1) the public has recognized the critical, specialized properties that REEs contribute to modern technology, as well as (2) Chin
Authors
Bradley S. Van Gosen, Philip L. Verplanck, Keith R. Long, Joseph Gambogi, Robert R. Seal
Deposit model for heavy-mineral sands in coastal environments
This report provides a descriptive model of heavy-mineral sands, which are sedimentary deposits of dense minerals that accumulate with sand, silt, and clay in coastal environments, locally forming economic concentrations of the heavy minerals. This deposit type is the main source of titanium feedstock for the titanium dioxide (TiO2) pigments industry, through recovery of the minerals ilmenite (Fe2
Authors
Bradley S. Van Gosen, David L. Fey, Anjana K. Shah, Philip L. Verplanck, Todd M. Hoefen
Characterization of Lone Pine, California, tremolite asbestos and preparation of research material
Well-characterized amphibole asbestos mineral samples are required for use as analytical standards and in future research projects. Currently, the National Institute for Standards and Technology Standard Reference Material samples of asbestos are listed as ‘Discontinued’. The National Institute for Occupational Safety and Health (NIOSH) has a goal under the Asbestos Roadmap of locating and charact
Authors
Martin Harper, Bradley S. Van Gosen, Owen S Crankshaw, Stacy S Doorn, J. Todd Ennis, Sara E Harrison
Mineral resource of the month: Wollastonite
Wollastonite, a calcium metasilicate, has an ideal composition of 48.3 percent calcium oxide and 51.7 percent silicon dioxide, but it can also contain minor amounts of aluminum, iron, magnesium, manganese, potassium, sodium or strontium substituting for calcium. Wollastonite occurs as prismatic crystals that break into tabular-to-acicular fragments. It is usually white but also may be gray, cream,
Authors
Robert L. Virta, Bradley S. Van Gosen
A deposit model for carbonatite and peralkaline intrusion-related rare earth element deposits
Carbonatite and alkaline intrusive complexes, as well as their weathering products, are the primary sources of rare earth elements. A wide variety of other commodities have been exploited from carbonatites and alkaline igneous rocks including niobium, phosphate, titanium, vermiculite, barite, fluorite, copper, calcite, and zirconium. Other elements enriched in these deposits include manganese, str
Authors
Philip L. Verplanck, Bradley S. Van Gosen, Robert R. Seal, Anne E. McCafferty
Mineral Resource of the Month: Talc
When people think of talc, they often think of talcum and baby powder. However, these uses of talc are minor compared to its use in industrial manufacturing. The leading use of talc in the United States is in the production of ceramics, where it is a source of magnesium oxide, serves as a flux to reduce firing temperatures, and improves thermal shock characteristics of the final product. Worldwide
Authors
Robert L. Virta, Bradley S. Van Gosen
Geophysical interpretation of U, Th, and rare earth element mineralization of the Bokan Mountain peralkaline granite complex, Prince of Wales Island, southeast Alaska
A prospectivity map for rare earth element (REE) mineralization at the Bokan Mountain peralkaline granite complex, Prince of Wales Island, southeastern Alaska, was calculated from high-resolution airborne gamma-ray data. The map displays areas with similar radioelement concentrations as those over the Dotson REE-vein-dike system, which is characterized by moderately high %K, eU, and eTh (%K, perce
Authors
Anne E. McCafferty, Douglas B. Stoeser, Bradley S. Van Gosen
Geologic occurrences of erionite in the United States: an emerging national public health concern for respiratory disease
Erionite, a mineral series within the zeolite group, is classified as a Group 1 known respiratory carcinogen. This designation resulted from extremely high incidences of mesothelioma discovered in three small villages from the Cappadocia region of Turkey, where the disease was linked to environmental exposures to fibrous forms of erionite. Natural deposits of erionite, including fibrous forms, hav
Authors
Bradley S. Van Gosen, Thomas A. Blitz, Geoffrey S. Plumlee, Gregory P. Meeker, M. Patrick Pierson
Alaska's rare earth deposits and resource potential
Alaska’s known mineral endowment includes some of the largest and highest grade deposits of various metals, including gold, copper and zinc. Recently, Alaska has also been active in the worldwide search for sources of rare earth elements (REE) to replace exports now being limitedby China. Driven by limited supply of the rare earths, combined with their increasing use in new ‘green’ energy, lightin
Authors
James C. Barker, Bradley S. Van Gosen
The principal rare earth elements deposits of the United States: A summary of domestic deposits and a global perspective
Demand for the rare earth elements (REE, lanthanide elements) is estimated to be increasing at a rate of about 8% per year due to increasing applications in consumer products, computers, automobiles, aircraft, and other advanced technology products. Much of this demand growth is driven by new technologies that increase energy efficiency and substitute away from fossil fuels. Production of these el
Authors
Keith R. Long, Bradley S. Van Gosen, Nora K. Foley, Daniel Cordier
Data report for the geologic and scenic quality evaluation of selected sand and gravel sites on the Wind River Indian Reservation, Wyoming
In April 2005, the U.S. Geological Survey (USGS) conducted field studies on the Wind River Indian Reservation, Wyoming, to inventory and evaluate sand and gravel deposits underlying river terraces on tribal lands along the Wind River. This report contains the results for 12 sites of sand and gravel deposits evaluated for their potential use as aggregate in Portland cement concrete, asphalt, and ba
Authors
William H. Langer, Bradley S. Van Gosen, Belinda Arbogast, David A. Lindsey
Carbonatite and alkaline intrusion-related rare earth element deposits–A deposit model
The rare earth elements are not as rare in nature as their name implies, but economic deposits with these elements are not common and few deposits have been large producers. In the past 25 years, demand for rare earth elements has increased dramatically because of their wide and diverse use in high-technology applications. Yet, presently the global production and supply of rare earth elements come
Authors
Philip L. Verplanck, Bradley S. Van Gosen