James Hein
zation
Geologist Emeritus with the USGS Pacific Coastal and Marine Science Center
Science and Products
Filter Total Items: 167
Geological and geochemical data for seamounts and associated ferromanganese crusts in and near the Hawaiian, Johnston Island, and Palmyra Island Exclusive Economic Zone Geological and geochemical data for seamounts and associated ferromanganese crusts in and near the Hawaiian, Johnston Island, and Palmyra Island Exclusive Economic Zone
No abstract available.
Authors
J.R. Hein, F.T. Manheim, W. C. Schwab, A. S. Davis, C.L. Daniel, R. M. Bouse, L.A. Morgenson, R.E. Sliney, David Clague, G. B. Tate, D.A. Cacchione
Distribution of clay minerals in the suspended and bottom sediments from the northern Bering Sea shelf area, Alaska Distribution of clay minerals in the suspended and bottom sediments from the northern Bering Sea shelf area, Alaska
No abstract available.
Authors
Frederika C. Moser, James R. Hein
Paleogene geology and chronology of southwestern Umnak Island, Aleutian Islands, Alaska Paleogene geology and chronology of southwestern Umnak Island, Aleutian Islands, Alaska
The rocks of southwestern Umnak Island (Nikolski area) consist mainly of a slightly deformed marine sedimentary sequence intruded by hypabyssal quartz diorite sills and small plutons. Laminated and thin-bedded argillaceous and tuffaceous mudstone and siltstone reflect volcanic arc sedimentation from late Eocene to early Oligocene time. Zeolite facies minerals formed during diagenesis...
Authors
H. McLean, J.R. Hein
Reconnaissance geology of southern Atka Island, Aleutian Islands, Alaska Reconnaissance geology of southern Atka Island, Aleutian Islands, Alaska
No abstract available.
Authors
James R. Hein, Hugh McLean, T.L. Vallier
Uranium and thorium enrichment in rocks from the base of DSDP Hole 465A, Hess Rise, central North Pacific Uranium and thorium enrichment in rocks from the base of DSDP Hole 465A, Hess Rise, central North Pacific
Uranium and thorium are concentrated in Cretaceous limestone, chert, ash, basalt, and other rock types at Deep Sea Drilling Project Site 465 located on the southern Hess Rise in the central North Pacific. U concentrations, up to 194 ppm on a carbonate-free basis, are among the highest recorded for any deep-sea deposits. U was initially derived from seawater and concentrated by absorption...
Authors
J.R. Hein, R.A. Koski, L.A. Morgenson
Petrographic and chemical characteristics of pyrite-marcasite mineralization in hole 465A, southern Hess Rise Petrographic and chemical characteristics of pyrite-marcasite mineralization in hole 465A, southern Hess Rise
Core recovered from Hess Rise contains concentrations of pyrite, marcasite, and barite in the lowermost meter of limestone (Unit II) and in the brecciated upper part of the underlying volcanic basement (Unit HI). Petrographic and chemical data indicate that the sulfide-barite assemblage in the limestone is mainly a product of low-temperature diagenetic processes. The iron-sulfide phases...
Authors
Randolph A. Koski, James R. Hein
Science and Products
Filter Total Items: 167
Geological and geochemical data for seamounts and associated ferromanganese crusts in and near the Hawaiian, Johnston Island, and Palmyra Island Exclusive Economic Zone Geological and geochemical data for seamounts and associated ferromanganese crusts in and near the Hawaiian, Johnston Island, and Palmyra Island Exclusive Economic Zone
No abstract available.
Authors
J.R. Hein, F.T. Manheim, W. C. Schwab, A. S. Davis, C.L. Daniel, R. M. Bouse, L.A. Morgenson, R.E. Sliney, David Clague, G. B. Tate, D.A. Cacchione
Distribution of clay minerals in the suspended and bottom sediments from the northern Bering Sea shelf area, Alaska Distribution of clay minerals in the suspended and bottom sediments from the northern Bering Sea shelf area, Alaska
No abstract available.
Authors
Frederika C. Moser, James R. Hein
Paleogene geology and chronology of southwestern Umnak Island, Aleutian Islands, Alaska Paleogene geology and chronology of southwestern Umnak Island, Aleutian Islands, Alaska
The rocks of southwestern Umnak Island (Nikolski area) consist mainly of a slightly deformed marine sedimentary sequence intruded by hypabyssal quartz diorite sills and small plutons. Laminated and thin-bedded argillaceous and tuffaceous mudstone and siltstone reflect volcanic arc sedimentation from late Eocene to early Oligocene time. Zeolite facies minerals formed during diagenesis...
Authors
H. McLean, J.R. Hein
Reconnaissance geology of southern Atka Island, Aleutian Islands, Alaska Reconnaissance geology of southern Atka Island, Aleutian Islands, Alaska
No abstract available.
Authors
James R. Hein, Hugh McLean, T.L. Vallier
Uranium and thorium enrichment in rocks from the base of DSDP Hole 465A, Hess Rise, central North Pacific Uranium and thorium enrichment in rocks from the base of DSDP Hole 465A, Hess Rise, central North Pacific
Uranium and thorium are concentrated in Cretaceous limestone, chert, ash, basalt, and other rock types at Deep Sea Drilling Project Site 465 located on the southern Hess Rise in the central North Pacific. U concentrations, up to 194 ppm on a carbonate-free basis, are among the highest recorded for any deep-sea deposits. U was initially derived from seawater and concentrated by absorption...
Authors
J.R. Hein, R.A. Koski, L.A. Morgenson
Petrographic and chemical characteristics of pyrite-marcasite mineralization in hole 465A, southern Hess Rise Petrographic and chemical characteristics of pyrite-marcasite mineralization in hole 465A, southern Hess Rise
Core recovered from Hess Rise contains concentrations of pyrite, marcasite, and barite in the lowermost meter of limestone (Unit II) and in the brecciated upper part of the underlying volcanic basement (Unit HI). Petrographic and chemical data indicate that the sulfide-barite assemblage in the limestone is mainly a product of low-temperature diagenetic processes. The iron-sulfide phases...
Authors
Randolph A. Koski, James R. Hein