James Hein
zation
Geologist Emeritus with the USGS Pacific Coastal and Marine Science Center
Science and Products
Filter Total Items: 167
Deep-sea mining: Integrating geology, oceanography, and engineering
[No abstract available]
Authors
F.M. Meyer, P.E. Halbach, P.N. Martens, James R. Hein, S. Scott
Lithium contents and isotopic compositions of ferromanganese deposits from the global ocean
To test the feasibility of using lithium isotopes in marine ferromanganese deposits as an indicator of paleoceanographic conditions and seawater composition, we analyzed samples from a variety of tectonic environments in the global ocean. Hydrogenetic, hydrothermal, mixed hydrogenetic–hydrothermal, and hydrogenetic–diagenetic samples were subjected to a two-step leaching and dissolution...
Authors
L.-H. Chan, James R. Hein
Barite-forming environments along a rifted continental margin, Southern California Borderland
The Southern California Continental Borderland (SCCB) is part of the broad San Andreas transform-fault plate boundary that consists of a series of fault-bounded, petroleum-generating basins. The SCCB has high heat flow and geothermal gradients produced by thinned continental crust and Neogene volcanism. Barite deposits in the SCCB occur along faults.Barite samples from two sea-cliff...
Authors
James R. Hein, Robert A. Zierenberg, J. Barry Maynard, Mark D. Hannington
Platinum group elements and gold in ferromanganese crusts from Afanasiy-Nikitin seamount, equatorial Indian Ocean: Sources and fractionation
The major element relationships in ferromanganese (Fe-Mn) crusts from Afanasiy-Nikitin seamount (ANS), eastern equatorial Indian Ocean, appear to be atypical. High positive correlations (r = 0.99) between Mn/Co and Fe/Co ratios, and lack of correlation of those ratios with Co, Ce, and Ce/Co, indicate that the ANS Fe-Mn crusts are distinct from Pacific seamount Fe-Mn crusts, and reflect...
Authors
Virupaxa K. Banakar, James R. Hein, R.P. Rajani, A.R. Chodankar
Quantitative x-ray diffraction mineralogy of Los Angeles basin core samples
This report contains X-ray diffraction (XRD) analysis of mineralogy for 81 sediment samples from cores taken from three drill holes in the Los Angeles Basin in 2000-2001. We analyzed 26 samples from Pier F core, 29 from Pier C core, and 26 from the Webster core. These three sites provide an offshore-onshore record across the Southern California coastal zone. This report is designed to be...
Authors
James R. Hein, Brandie R. McIntyre, Brian Edwards, Orion I. Lakota
Methanogenic calcite, 13C-depleted bivalve shells, and gas hydrate from a mud volcano offshore southern California
Methane and hydrogen sulfide vent from a cold seep above a shallowly buried methane hydrate in a mud volcano located 24 km offshore southern California in?? 800 m of water. Bivalves, authigenic calcite, and methane hydrate were recovered in a 2.1 m piston core. Aragonite shells of two bivalve species are unusually depleted in 13C (to -91??? ??13C), the most 13C-depleted shells of marine...
Authors
James R. Hein, W.R. Normark, B.R. McIntyre, T.D. Lorenson, C.L. Powell
Science and Products
Filter Total Items: 167
Deep-sea mining: Integrating geology, oceanography, and engineering
[No abstract available]
Authors
F.M. Meyer, P.E. Halbach, P.N. Martens, James R. Hein, S. Scott
Lithium contents and isotopic compositions of ferromanganese deposits from the global ocean
To test the feasibility of using lithium isotopes in marine ferromanganese deposits as an indicator of paleoceanographic conditions and seawater composition, we analyzed samples from a variety of tectonic environments in the global ocean. Hydrogenetic, hydrothermal, mixed hydrogenetic–hydrothermal, and hydrogenetic–diagenetic samples were subjected to a two-step leaching and dissolution...
Authors
L.-H. Chan, James R. Hein
Barite-forming environments along a rifted continental margin, Southern California Borderland
The Southern California Continental Borderland (SCCB) is part of the broad San Andreas transform-fault plate boundary that consists of a series of fault-bounded, petroleum-generating basins. The SCCB has high heat flow and geothermal gradients produced by thinned continental crust and Neogene volcanism. Barite deposits in the SCCB occur along faults.Barite samples from two sea-cliff...
Authors
James R. Hein, Robert A. Zierenberg, J. Barry Maynard, Mark D. Hannington
Platinum group elements and gold in ferromanganese crusts from Afanasiy-Nikitin seamount, equatorial Indian Ocean: Sources and fractionation
The major element relationships in ferromanganese (Fe-Mn) crusts from Afanasiy-Nikitin seamount (ANS), eastern equatorial Indian Ocean, appear to be atypical. High positive correlations (r = 0.99) between Mn/Co and Fe/Co ratios, and lack of correlation of those ratios with Co, Ce, and Ce/Co, indicate that the ANS Fe-Mn crusts are distinct from Pacific seamount Fe-Mn crusts, and reflect...
Authors
Virupaxa K. Banakar, James R. Hein, R.P. Rajani, A.R. Chodankar
Quantitative x-ray diffraction mineralogy of Los Angeles basin core samples
This report contains X-ray diffraction (XRD) analysis of mineralogy for 81 sediment samples from cores taken from three drill holes in the Los Angeles Basin in 2000-2001. We analyzed 26 samples from Pier F core, 29 from Pier C core, and 26 from the Webster core. These three sites provide an offshore-onshore record across the Southern California coastal zone. This report is designed to be...
Authors
James R. Hein, Brandie R. McIntyre, Brian Edwards, Orion I. Lakota
Methanogenic calcite, 13C-depleted bivalve shells, and gas hydrate from a mud volcano offshore southern California
Methane and hydrogen sulfide vent from a cold seep above a shallowly buried methane hydrate in a mud volcano located 24 km offshore southern California in?? 800 m of water. Bivalves, authigenic calcite, and methane hydrate were recovered in a 2.1 m piston core. Aragonite shells of two bivalve species are unusually depleted in 13C (to -91??? ??13C), the most 13C-depleted shells of marine...
Authors
James R. Hein, W.R. Normark, B.R. McIntyre, T.D. Lorenson, C.L. Powell