James Hein
zation
Geologist Emeritus with the USGS Pacific Coastal and Marine Science Center
Science and Products
Filter Total Items: 167
Global occurrence of tellurium-rich ferromanganese crusts and a model for the enrichment of tellurium Global occurrence of tellurium-rich ferromanganese crusts and a model for the enrichment of tellurium
Hydrogenetic ferromanganese oxyhydroxide crusts (Fe-Mn crusts) precipitate out of cold ambient ocean water onto hard-rock surfaces (seamounts, plateaus, ridges) at water depths of about 400 to 4000 m throughout the ocean basins. The slow-growing (mm/Ma) Fe-Mn crusts concentrate most elements above their mean concentration in the Earth’s crust. Tellurium is enriched more than any other...
Authors
J.R. Hein, A. Koschinsky, A. N. Halliday
Clay-mineral suites, sources, and inferred dispersal routes: Southern California continental shelf Clay-mineral suites, sources, and inferred dispersal routes: Southern California continental shelf
Clay mineralogy is useful in determining the distribution, sources, and dispersal routes of fine-grained sediments. In addition, clay minerals, especially smectite, may control the degree to which contaminants are adsorbed by the sediment. We analyzed 250 shelf sediment samples, 24 river-suspended-sediment samples, and 12 river-bed samples for clay-mineral contents in the Southern...
Authors
J.R. Hein, J.S. Dowling, A. Schuetze, H.J. Lee
Lead isotopes in North Pacific deep water - Implications for past changes in input sources and circulation patterns Lead isotopes in North Pacific deep water - Implications for past changes in input sources and circulation patterns
The sources of non-anthropogenic Pb in seawater have been the subject of debate. Here we present Pb isotope time-series that indicate that the non-anthropogenic Pb budget of the northernmost Pacific Ocean has been governed by ocean circulation and riverine inputs, which in turn have ultimately been controlled by tectonic processes. Despite the fact that the investigated locations are...
Authors
T. van de Flierdt, M. Frank, A. N. Halliday, J.R. Hein, B. Hattendorf, D. Gunther, P.W. Kubik
Uptake of elements from seawater by ferromanganese crusts: Solid-phase associations and seawater speciation Uptake of elements from seawater by ferromanganese crusts: Solid-phase associations and seawater speciation
Marine Fe-Mn oxyhydroxide crusts form by precipitation of dissolved components from seawater. Three hydrogenetic crust samples (one phosphatized) and two hydrothermal Mn-oxide samples were subjected to a sequential-leaching procedure in order to determine the host phases of 40 elements. Those host-phase associations are discussed with respect to element speciation in seawater. The...
Authors
A. Koschinsky, J.R. Hein
Western Phosphate Field, U.S.A.; science in support of land management Western Phosphate Field, U.S.A.; science in support of land management
No abstract available.
Authors
James R. Hein
Composition of the Rex Chert and associated rocks of the Permian Phosphoria Formation: Soda Springs area, SE Idaho Composition of the Rex Chert and associated rocks of the Permian Phosphoria Formation: Soda Springs area, SE Idaho
This study, one in a series, reports bulk chemical and mineralogical compositions, as well as petrographic and outcrop descriptions of rocks collected from three measured outcrop sections of the Rex Chert member of the Phosphoria Formation in SE Idaho. The three measured sections were chosen from ten outcrops of Rex Chert that were described in the field. The Rex Chert overlies the Meade...
Authors
James R. Hein, Brandie McIntyre, Robert B. Perkins, David Z. Piper, James Evans
Science and Products
Filter Total Items: 167
Global occurrence of tellurium-rich ferromanganese crusts and a model for the enrichment of tellurium Global occurrence of tellurium-rich ferromanganese crusts and a model for the enrichment of tellurium
Hydrogenetic ferromanganese oxyhydroxide crusts (Fe-Mn crusts) precipitate out of cold ambient ocean water onto hard-rock surfaces (seamounts, plateaus, ridges) at water depths of about 400 to 4000 m throughout the ocean basins. The slow-growing (mm/Ma) Fe-Mn crusts concentrate most elements above their mean concentration in the Earth’s crust. Tellurium is enriched more than any other...
Authors
J.R. Hein, A. Koschinsky, A. N. Halliday
Clay-mineral suites, sources, and inferred dispersal routes: Southern California continental shelf Clay-mineral suites, sources, and inferred dispersal routes: Southern California continental shelf
Clay mineralogy is useful in determining the distribution, sources, and dispersal routes of fine-grained sediments. In addition, clay minerals, especially smectite, may control the degree to which contaminants are adsorbed by the sediment. We analyzed 250 shelf sediment samples, 24 river-suspended-sediment samples, and 12 river-bed samples for clay-mineral contents in the Southern...
Authors
J.R. Hein, J.S. Dowling, A. Schuetze, H.J. Lee
Lead isotopes in North Pacific deep water - Implications for past changes in input sources and circulation patterns Lead isotopes in North Pacific deep water - Implications for past changes in input sources and circulation patterns
The sources of non-anthropogenic Pb in seawater have been the subject of debate. Here we present Pb isotope time-series that indicate that the non-anthropogenic Pb budget of the northernmost Pacific Ocean has been governed by ocean circulation and riverine inputs, which in turn have ultimately been controlled by tectonic processes. Despite the fact that the investigated locations are...
Authors
T. van de Flierdt, M. Frank, A. N. Halliday, J.R. Hein, B. Hattendorf, D. Gunther, P.W. Kubik
Uptake of elements from seawater by ferromanganese crusts: Solid-phase associations and seawater speciation Uptake of elements from seawater by ferromanganese crusts: Solid-phase associations and seawater speciation
Marine Fe-Mn oxyhydroxide crusts form by precipitation of dissolved components from seawater. Three hydrogenetic crust samples (one phosphatized) and two hydrothermal Mn-oxide samples were subjected to a sequential-leaching procedure in order to determine the host phases of 40 elements. Those host-phase associations are discussed with respect to element speciation in seawater. The...
Authors
A. Koschinsky, J.R. Hein
Western Phosphate Field, U.S.A.; science in support of land management Western Phosphate Field, U.S.A.; science in support of land management
No abstract available.
Authors
James R. Hein
Composition of the Rex Chert and associated rocks of the Permian Phosphoria Formation: Soda Springs area, SE Idaho Composition of the Rex Chert and associated rocks of the Permian Phosphoria Formation: Soda Springs area, SE Idaho
This study, one in a series, reports bulk chemical and mineralogical compositions, as well as petrographic and outcrop descriptions of rocks collected from three measured outcrop sections of the Rex Chert member of the Phosphoria Formation in SE Idaho. The three measured sections were chosen from ten outcrops of Rex Chert that were described in the field. The Rex Chert overlies the Meade...
Authors
James R. Hein, Brandie McIntyre, Robert B. Perkins, David Z. Piper, James Evans