James Hein
zation
Geologist Emeritus with the USGS Pacific Coastal and Marine Science Center
Science and Products
Filter Total Items: 166
Description; mineralogical, chemical, and isotopic compositions; petrography; diagenesis; and uranium-series ages of drill cores from the Lagoon of Aitutaki, Cook Islands
No abstract available.
Authors
J. R. Hein, B. M. Richmond, S.C. Gray, Ruth Hausmann, M.W. Colgan, Dallilah El Sabbagh, L.M. Gein
Cobalt- and platinum-rich ferromanganese crusts and associated substrate rocks from the Marshall Islands
Ferromanganese crusts cover most hard substrates on seafloor edifices in the central Pacific basin. Crust samples and their associated substrates from seven volcanic edifices of Cretaceous age along the Ratak chain of the Marshall Islands are discussed. The two most abundant substrate lithologies recovered were limestone, dominantly fore-reef slope deposits, and volcanic breccia composed primarily
Authors
J. R. Hein, W. C. Schwab, A. Davis
Sr and Nd isotopic variations in ferromanganese crusts from the Central Pacific: Implications for age and source provenance
Isotopic analyses of two hydrogenetic ferromanganese (Fe-Mn) crusts from volcanic edifices in the central Pacific Ocean reveal systematic variations in 87Sr86Sr and 143Nd144Nd, with both ratios decreasing as a function of depth into the Fe-Mn crusts. Leaching experiments suggest that Sr in the crusts is contained in at least two discrete sites. A loosely bound Sr, dominated by modern marine Sr, is
Authors
K. Futa, Z. E. Peterman, J. R. Hein
Submarine ferromanganese deposits from the Mariana and Volcano volcanic arcs, West Pacific
No abstract available.
Authors
J. R. Hein, C.L. Fleishman, L.A. Morgenson, S.H. Bloomer, R.J. Stern
Comparison of multiple-year analyses of clay mineralogy of the Copper River system and the Gulf of Alaska
No abstract available.
Authors
Gretchen Luepke, B. F. Molnia, James R. Hein
Farnella Cruise F7-86-HW, cobalt-rich ferromanganese crust data report for Karin Ridge and Johnston Island, Central Pacific
No abstract available.
Authors
J. R. Hein, W. C. Schwab, D.G. Foot, Yoshio Masuda, Akira Usui, A. S. Davis, C.L. Fleishman, D.L. Barna, L. G. Pickthorn, D.A. Larson, Peter Ruzzi, L.M. Benninger, L.M. Gein
Cobalt-rich ferromanganese crusts from the Central Pacific
Ferromanganese crusts coat most hard substrates on seamounts, ridges, and plateaus in the centralPacific basin. Crusts from less than 2500 m water depth are rich in Mn, Co, Ni, Pb, and Pt. Samples we collected from the EEl of the Hawaiian, Johnston, Palmyra, and Marshall Islands are discussed. Necker Ridge in the Hawaiian EEl has the greatest average crust thickness of 4 em. The dominant mineral i
Authors
James R. Hein, Frank T. Manheim, William C. Schwab
Geological and geochemical data for seamounts and associated ferromanganese crusts in the Ratak Chain, Marshall Islands
In 1984, the U.S. Geological Survey (USGS) conducted a reconnaissance cruise L9-84-CP aboard the R/V S.P. LEE along the northern Ratak Ridge, Marshall Islands (Fig. 1). Preliminary geochemical results from the cruise show that ferromanganese crusts (Mn crusts) on the submarine slopes of seamounts, and islands may have potential for commercial exploitation (Schwab and others, 1985). In this report
Authors
W. C. Schwab, J. R. Hein, A. S. Davis, L.A. Morgenson, C.L. Daniel, J.A. Haggerty
Ferromanganese crusts from Necker Ridge, Horizon Guyot and S.P. Lee Guyot: Geological considerations
Necker Ridge, Horizon Guyot and S.P. Lee Guyot in the Central Pacific were sampled, seismically surveyed, and photographed by bottom cameras in order to better understand the distribution, origin, and evolution of ferromanganese crusts. Necker Ridge is over 600 km long with a rugged crest, pods of sediment to 146 m thick, slopes that average 12° to 20°, and debris aprons that cover some of the low
Authors
James R. Hein, Frank T. Manheim, William C. Schwab, Alice S. Davis
Stable-isotope study of volcanogenic- and sedimentary-manganese deposits
No abstract available.
Authors
Hsueh-Wen Yeh, J. R. Hein, R.A. Koski
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
Science and Products
Filter Total Items: 166
Description; mineralogical, chemical, and isotopic compositions; petrography; diagenesis; and uranium-series ages of drill cores from the Lagoon of Aitutaki, Cook Islands
No abstract available.
Authors
J. R. Hein, B. M. Richmond, S.C. Gray, Ruth Hausmann, M.W. Colgan, Dallilah El Sabbagh, L.M. Gein
Cobalt- and platinum-rich ferromanganese crusts and associated substrate rocks from the Marshall Islands
Ferromanganese crusts cover most hard substrates on seafloor edifices in the central Pacific basin. Crust samples and their associated substrates from seven volcanic edifices of Cretaceous age along the Ratak chain of the Marshall Islands are discussed. The two most abundant substrate lithologies recovered were limestone, dominantly fore-reef slope deposits, and volcanic breccia composed primarily
Authors
J. R. Hein, W. C. Schwab, A. Davis
Sr and Nd isotopic variations in ferromanganese crusts from the Central Pacific: Implications for age and source provenance
Isotopic analyses of two hydrogenetic ferromanganese (Fe-Mn) crusts from volcanic edifices in the central Pacific Ocean reveal systematic variations in 87Sr86Sr and 143Nd144Nd, with both ratios decreasing as a function of depth into the Fe-Mn crusts. Leaching experiments suggest that Sr in the crusts is contained in at least two discrete sites. A loosely bound Sr, dominated by modern marine Sr, is
Authors
K. Futa, Z. E. Peterman, J. R. Hein
Submarine ferromanganese deposits from the Mariana and Volcano volcanic arcs, West Pacific
No abstract available.
Authors
J. R. Hein, C.L. Fleishman, L.A. Morgenson, S.H. Bloomer, R.J. Stern
Comparison of multiple-year analyses of clay mineralogy of the Copper River system and the Gulf of Alaska
No abstract available.
Authors
Gretchen Luepke, B. F. Molnia, James R. Hein
Farnella Cruise F7-86-HW, cobalt-rich ferromanganese crust data report for Karin Ridge and Johnston Island, Central Pacific
No abstract available.
Authors
J. R. Hein, W. C. Schwab, D.G. Foot, Yoshio Masuda, Akira Usui, A. S. Davis, C.L. Fleishman, D.L. Barna, L. G. Pickthorn, D.A. Larson, Peter Ruzzi, L.M. Benninger, L.M. Gein
Cobalt-rich ferromanganese crusts from the Central Pacific
Ferromanganese crusts coat most hard substrates on seamounts, ridges, and plateaus in the centralPacific basin. Crusts from less than 2500 m water depth are rich in Mn, Co, Ni, Pb, and Pt. Samples we collected from the EEl of the Hawaiian, Johnston, Palmyra, and Marshall Islands are discussed. Necker Ridge in the Hawaiian EEl has the greatest average crust thickness of 4 em. The dominant mineral i
Authors
James R. Hein, Frank T. Manheim, William C. Schwab
Geological and geochemical data for seamounts and associated ferromanganese crusts in the Ratak Chain, Marshall Islands
In 1984, the U.S. Geological Survey (USGS) conducted a reconnaissance cruise L9-84-CP aboard the R/V S.P. LEE along the northern Ratak Ridge, Marshall Islands (Fig. 1). Preliminary geochemical results from the cruise show that ferromanganese crusts (Mn crusts) on the submarine slopes of seamounts, and islands may have potential for commercial exploitation (Schwab and others, 1985). In this report
Authors
W. C. Schwab, J. R. Hein, A. S. Davis, L.A. Morgenson, C.L. Daniel, J.A. Haggerty
Ferromanganese crusts from Necker Ridge, Horizon Guyot and S.P. Lee Guyot: Geological considerations
Necker Ridge, Horizon Guyot and S.P. Lee Guyot in the Central Pacific were sampled, seismically surveyed, and photographed by bottom cameras in order to better understand the distribution, origin, and evolution of ferromanganese crusts. Necker Ridge is over 600 km long with a rugged crest, pods of sediment to 146 m thick, slopes that average 12° to 20°, and debris aprons that cover some of the low
Authors
James R. Hein, Frank T. Manheim, William C. Schwab, Alice S. Davis
Stable-isotope study of volcanogenic- and sedimentary-manganese deposits
No abstract available.
Authors
Hsueh-Wen Yeh, J. R. Hein, R.A. Koski
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