James Hein
zation
Geologist Emeritus with the USGS Pacific Coastal and Marine Science Center
Science and Products
Filter Total Items: 167
Precambrian to modern manganese mineralization: Changes in ore type and depositional environment Precambrian to modern manganese mineralization: Changes in ore type and depositional environment
No abstract available.
Authors
Keith Nicholson, James R. Hein, Bernhard Buhn, Somnath Dasgupta
The zeolite deposits of Greece The zeolite deposits of Greece
Zeolites are present in altered pyroclastic rocks at many localities in Greece, and large deposits of potential economic interest are present in three areas: (1) the Evros region of the province of Thrace in the north-eastern part of the Greek mainland; (2) the islands of Kimolos and Poliegos in the western Aegean; and (3) the island of Samos in the eastern Aegean Sea. The deposits in...
Authors
M.G. Stamatakis, A. Hall, J.R. Hein
Global distribution of beryllium isotopes in deep ocean water as derived from Fe-Mn crusts Global distribution of beryllium isotopes in deep ocean water as derived from Fe-Mn crusts
The direct measurement of the ratio of cosmogenic 10Be (T12= 1.5 Ma) to stable terrigenously sourced 9Be in deep seawater or marine deposits can be used to trace water mass movements and to quantify the incorporation of trace metals into the deep sea. In this study a SIMS-based technique has been used to determine the 10Be9Be ratios of the outermost millimetre of hydrogenetic...
Authors
F. Von Blanckenburg, R. K. O’Nions, N.S. Belshaw, A. Gibb, J.R. Hein
Distribution and sources of pre-anthropogenic lead isotopes in deep ocean water from Fe-Mn crusts Distribution and sources of pre-anthropogenic lead isotopes in deep ocean water from Fe-Mn crusts
The lead isotope composition of ocean water is not well constrained due to contamination by anthropogenic lead. Here the global distribution of lead isotopes in deep ocean water is presented as derived from dated (ca. 100 ka) surface layers of hydrogenetic Fe-Mn crusts. The results indicate that the radiogenic lead in North Atlantic deep water is probably supplied from the continents by...
Authors
F. Von Blanckenburg, R. K. O’Nions, J.R. Hein
Hydrothermal mineralization along submarine rift zones, Hawaii Hydrothermal mineralization along submarine rift zones, Hawaii
This is the first article to describe mineralization of midplate submarine rift zones and hydrothermal manganese oxide mineralization of midplate volcanic edifices. Hydrothermal Mn oxides were recovered from submarine extensions of two Hawaiian rift zones, along Haleakala and Puna Ridges. These Mn oxides form two types of deposits, metallic stratiform layers in volcaniclastic rocks and...
Authors
J.R. Hein, A. E. Gibbs, D.A. Clague, M. Torresan
Comparison of the partitioning behaviours of yttrium, rare earth elements, and titanium between hydrogenetic marine ferromanganese crusts and seawater Comparison of the partitioning behaviours of yttrium, rare earth elements, and titanium between hydrogenetic marine ferromanganese crusts and seawater
In order to evaluate details of the partitioning behaviours of Y, rare earth elements (REEs), and Ti between inorganic metal oxide surfaces and seawater, we studied the distribution of these elements in hydrogenetic marine ferromanganese (Fe-Mn) crusts from the Central Pacific Ocean. Nonphosphatized Fe-Mn crusts display shale-normalized rare earths and yttrium (REYSN) patterns (Y...
Authors
Michael Bau, Andrea Koschinsky, Peter Dulski, James R. Hein
Science and Products
Filter Total Items: 167
Precambrian to modern manganese mineralization: Changes in ore type and depositional environment Precambrian to modern manganese mineralization: Changes in ore type and depositional environment
No abstract available.
Authors
Keith Nicholson, James R. Hein, Bernhard Buhn, Somnath Dasgupta
The zeolite deposits of Greece The zeolite deposits of Greece
Zeolites are present in altered pyroclastic rocks at many localities in Greece, and large deposits of potential economic interest are present in three areas: (1) the Evros region of the province of Thrace in the north-eastern part of the Greek mainland; (2) the islands of Kimolos and Poliegos in the western Aegean; and (3) the island of Samos in the eastern Aegean Sea. The deposits in...
Authors
M.G. Stamatakis, A. Hall, J.R. Hein
Global distribution of beryllium isotopes in deep ocean water as derived from Fe-Mn crusts Global distribution of beryllium isotopes in deep ocean water as derived from Fe-Mn crusts
The direct measurement of the ratio of cosmogenic 10Be (T12= 1.5 Ma) to stable terrigenously sourced 9Be in deep seawater or marine deposits can be used to trace water mass movements and to quantify the incorporation of trace metals into the deep sea. In this study a SIMS-based technique has been used to determine the 10Be9Be ratios of the outermost millimetre of hydrogenetic...
Authors
F. Von Blanckenburg, R. K. O’Nions, N.S. Belshaw, A. Gibb, J.R. Hein
Distribution and sources of pre-anthropogenic lead isotopes in deep ocean water from Fe-Mn crusts Distribution and sources of pre-anthropogenic lead isotopes in deep ocean water from Fe-Mn crusts
The lead isotope composition of ocean water is not well constrained due to contamination by anthropogenic lead. Here the global distribution of lead isotopes in deep ocean water is presented as derived from dated (ca. 100 ka) surface layers of hydrogenetic Fe-Mn crusts. The results indicate that the radiogenic lead in North Atlantic deep water is probably supplied from the continents by...
Authors
F. Von Blanckenburg, R. K. O’Nions, J.R. Hein
Hydrothermal mineralization along submarine rift zones, Hawaii Hydrothermal mineralization along submarine rift zones, Hawaii
This is the first article to describe mineralization of midplate submarine rift zones and hydrothermal manganese oxide mineralization of midplate volcanic edifices. Hydrothermal Mn oxides were recovered from submarine extensions of two Hawaiian rift zones, along Haleakala and Puna Ridges. These Mn oxides form two types of deposits, metallic stratiform layers in volcaniclastic rocks and...
Authors
J.R. Hein, A. E. Gibbs, D.A. Clague, M. Torresan
Comparison of the partitioning behaviours of yttrium, rare earth elements, and titanium between hydrogenetic marine ferromanganese crusts and seawater Comparison of the partitioning behaviours of yttrium, rare earth elements, and titanium between hydrogenetic marine ferromanganese crusts and seawater
In order to evaluate details of the partitioning behaviours of Y, rare earth elements (REEs), and Ti between inorganic metal oxide surfaces and seawater, we studied the distribution of these elements in hydrogenetic marine ferromanganese (Fe-Mn) crusts from the Central Pacific Ocean. Nonphosphatized Fe-Mn crusts display shale-normalized rare earths and yttrium (REYSN) patterns (Y...
Authors
Michael Bau, Andrea Koschinsky, Peter Dulski, James R. Hein