James Hein
zation
Geologist Emeritus with the USGS Pacific Coastal and Marine Science Center
Science and Products
Filter Total Items: 167
Deep-ocean ferromanganese crusts and nodules Deep-ocean ferromanganese crusts and nodules
Ferromanganese crusts and nodules may provide a future resource for a large variety of metals, including many that are essential for emerging high- and green-technology applications. A brief review of nodules and crusts provides a setting for a discussion on the latest (past 10 years) research related to the geochemistry of sequestration of metals from seawater. Special attention is...
Authors
James R. Hein, Andrea Koschinsky
Sand sources and transport pathways for the San Francisco Bay coastal system, based on X-ray diffraction mineralogy Sand sources and transport pathways for the San Francisco Bay coastal system, based on X-ray diffraction mineralogy
The mineralogical compositions of 119 samples collected from throughout the San Francisco Bay coastal system, including bayfloor and seafloor, area beaches, cliff outcrops, and major drainages, were determined using X-ray diffraction (XRD). Comparison of the mineral concentrations and application of statistical cluster analysis of XRD spectra allowed for the determination of provenances...
Authors
James R. Hein, Kira Mizell, Patrick L. Barnard
A Sr-Nd isotopic study of sand-sized sediment provenance and transport for the San Francisco Bay coastal system A Sr-Nd isotopic study of sand-sized sediment provenance and transport for the San Francisco Bay coastal system
A diverse suite of geochemical tracers, including 87Sr/86Sr and 143Nd/144Nd isotope ratios, the rare earth elements (REEs), and select trace elements were used to determine sand-sized sediment provenance and transport pathways within the San Francisco Bay coastal system. This study complements a large interdisciplinary effort (Barnard et al., 2012) that seeks to better understand recent...
Authors
Robert J. Rosenbauer, Amy C. Foxgrover, James R. Hein, Peter W. Swarzenski
Integration of bed characteristics, geochemical tracers, current measurements, and numerical modeling for assessing the provenance of beach sand in the San Francisco Bay Coastal System Integration of bed characteristics, geochemical tracers, current measurements, and numerical modeling for assessing the provenance of beach sand in the San Francisco Bay Coastal System
Over 150 million m3 of sand-sized sediment has disappeared from the central region of the San Francisco Bay Coastal System during the last half century. This enormous loss may reflect numerous anthropogenic influences, such as watershed damming, bay-fill development, aggregate mining, and dredging. The reduction in Bay sediment also appears to be linked to a reduction in sediment supply...
Authors
Patrick L. Barnard, Amy C. Foxgrover, Edwin P.L. Elias, Li H. Erikson, James R. Hein, Mary McGann, Kira Mizell, Robert J. Rosenbauer, Peter W. Swarzenski, Renee K. Takesue, Florence L. Wong, Don Woodrow
U.S. Geological Survey Energy and Minerals science strategy: A resource lifecycle approach U.S. Geological Survey Energy and Minerals science strategy: A resource lifecycle approach
Executive Summary The economy, national security, and standard of living of the United States depend heavily on adequate and reliable supplies of energy and mineral resources. Based on population and consumption trends, the Nation’s use of energy and minerals can be expected to grow, driving the demand for ever broader scientific understanding of resource formation, location, and...
Authors
Richard C. Ferrero, Jonathan J. Kolak, Donald J. Bills, Zachary H. Bowen, Daniel J. Cordier, Tanya J. Gallegos, James R. Hein, Karen D. Kelley, Philip H. Nelson, Vito F. Nuccio, Jeanine M. Schmidt, Robert R. Seal
Deep-ocean mineral deposits as a source of critical metals for high- and green-technology applications: Comparison with land-based deposits Deep-ocean mineral deposits as a source of critical metals for high- and green-technology applications: Comparison with land-based deposits
No abstract available.
Authors
James R. Hein, Kira Mizell, Andrea Koschinsky, Tracey Conrad
Science and Products
Filter Total Items: 167
Deep-ocean ferromanganese crusts and nodules Deep-ocean ferromanganese crusts and nodules
Ferromanganese crusts and nodules may provide a future resource for a large variety of metals, including many that are essential for emerging high- and green-technology applications. A brief review of nodules and crusts provides a setting for a discussion on the latest (past 10 years) research related to the geochemistry of sequestration of metals from seawater. Special attention is...
Authors
James R. Hein, Andrea Koschinsky
Sand sources and transport pathways for the San Francisco Bay coastal system, based on X-ray diffraction mineralogy Sand sources and transport pathways for the San Francisco Bay coastal system, based on X-ray diffraction mineralogy
The mineralogical compositions of 119 samples collected from throughout the San Francisco Bay coastal system, including bayfloor and seafloor, area beaches, cliff outcrops, and major drainages, were determined using X-ray diffraction (XRD). Comparison of the mineral concentrations and application of statistical cluster analysis of XRD spectra allowed for the determination of provenances...
Authors
James R. Hein, Kira Mizell, Patrick L. Barnard
A Sr-Nd isotopic study of sand-sized sediment provenance and transport for the San Francisco Bay coastal system A Sr-Nd isotopic study of sand-sized sediment provenance and transport for the San Francisco Bay coastal system
A diverse suite of geochemical tracers, including 87Sr/86Sr and 143Nd/144Nd isotope ratios, the rare earth elements (REEs), and select trace elements were used to determine sand-sized sediment provenance and transport pathways within the San Francisco Bay coastal system. This study complements a large interdisciplinary effort (Barnard et al., 2012) that seeks to better understand recent...
Authors
Robert J. Rosenbauer, Amy C. Foxgrover, James R. Hein, Peter W. Swarzenski
Integration of bed characteristics, geochemical tracers, current measurements, and numerical modeling for assessing the provenance of beach sand in the San Francisco Bay Coastal System Integration of bed characteristics, geochemical tracers, current measurements, and numerical modeling for assessing the provenance of beach sand in the San Francisco Bay Coastal System
Over 150 million m3 of sand-sized sediment has disappeared from the central region of the San Francisco Bay Coastal System during the last half century. This enormous loss may reflect numerous anthropogenic influences, such as watershed damming, bay-fill development, aggregate mining, and dredging. The reduction in Bay sediment also appears to be linked to a reduction in sediment supply...
Authors
Patrick L. Barnard, Amy C. Foxgrover, Edwin P.L. Elias, Li H. Erikson, James R. Hein, Mary McGann, Kira Mizell, Robert J. Rosenbauer, Peter W. Swarzenski, Renee K. Takesue, Florence L. Wong, Don Woodrow
U.S. Geological Survey Energy and Minerals science strategy: A resource lifecycle approach U.S. Geological Survey Energy and Minerals science strategy: A resource lifecycle approach
Executive Summary The economy, national security, and standard of living of the United States depend heavily on adequate and reliable supplies of energy and mineral resources. Based on population and consumption trends, the Nation’s use of energy and minerals can be expected to grow, driving the demand for ever broader scientific understanding of resource formation, location, and...
Authors
Richard C. Ferrero, Jonathan J. Kolak, Donald J. Bills, Zachary H. Bowen, Daniel J. Cordier, Tanya J. Gallegos, James R. Hein, Karen D. Kelley, Philip H. Nelson, Vito F. Nuccio, Jeanine M. Schmidt, Robert R. Seal
Deep-ocean mineral deposits as a source of critical metals for high- and green-technology applications: Comparison with land-based deposits Deep-ocean mineral deposits as a source of critical metals for high- and green-technology applications: Comparison with land-based deposits
No abstract available.
Authors
James R. Hein, Kira Mizell, Andrea Koschinsky, Tracey Conrad