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Paleochemical Clues To Ancient Metalliferous Sediment Deposits: The Chinook Trough Hydrothermal Sequence
By Gerald R. Dickens
Massive sulfide ores and Fe-Mn oxyhydroxide precipitates represent two extremes of a spatial continuum of hydrothermal deposition along oceanic ridges. Elemental variations across this continuum are o
Jan 1, 1994
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Genesis Of The Diamond Mega-Placers Of Southern Africa And Its Global Context
By B. J. Bluck
Diamond mega-placers, in order to rank amongst the primary diamond deposits, are defined as => 70 m carats at =>95% gem quality. There is only one mega-placer known and that is found along the coast o
Jan 1, 2004
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Detection and Quantification of Seafloor Ilmenite Deposits Utilizing Induced Polarization
By Curtis Clement
Williamson & Associates, Inc. has developed a marine mineral exploration tool using an induced polarization technology (IP) under license from the US Geological Survey. Developed by Jeff Wynn at the
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Preliminary Economic Evaluation of Deep-sea REE Mud Mining
By Tetsuo Yamazaki
Deep-sea rare-earth element-rich mud (REE Mud) distributes in pelagic clayey sediment column on ocean seafloor at 4,000-6,000 m deep. The thickness ranges 5-80 m and the burial depth 0-100 m. The REE
Sep 14, 2011
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Marine Minerals And Paleoceanography
By Robert M. Owen
The reconstruction of ocean history has been a major focus of marine research over the past decade. A significant outcome of these investigations is the recognition that certain types of marine minera
Jan 1, 1995
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Hydrothermal Fields In Oceanic Fracture Zone Settings: An Example From The Blanco F.Z., Northeast Pacific
By James R. Hein
Low- to intermediate-temperature, diffuse-flow hydrothermal fields and associated mineral precipitates have been found at many locations along oceanic spreading centers, back-arc basin spreading axes,
Jan 1, 2001
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A Classification Society´s Experience with Subsea Mining
By Marco Figoni
The increased interest on deep water minerals resources is a challenge for both mining and oil industry. The exploration and production of oceans minerals require a synergy between of different techno
Sep 14, 2011
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Kuroko-Type Deposits From The Izu-Ogasawara (Bonin) Arc, Japan
By Kokichi Iizasa
Kuroko-type deposits exist in Japanese EEZ. Some of them are present in the Izu-Ogasawara oceanic island arc south of Tokyo. Major two Kuroko-type deposits occur in the area. One is the Sunrise hydr
Jan 1, 2002
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Evaluating Benthic Community Disturbance And Succession Following Simulated Manganese-Nodule Mining In The Equatorial Pacific
By Fred C. Dobbs
To effectively manage the potential environmental impacts of deep-sea mining of manganese nodules, we need to know substantially more about the effects of sediment redeposition on abyssal communities
Jan 1, 1992
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Iron And Manganese Oxide Deposits As Environmental Records: Examples In The NW Pacific Ocean And The Baltic Sea
By Akira Usui
Iron and manganese are very mobile metallic elements in the surface aqueous environment, particularly in the oceans. The elements are easily precipitated as oxides or dissolved back into water, contro
Jan 1, 2004
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Hydrothermal Sulfide Deposits In Lakes
By Sophia Katsouri
Hydrothermal circulation that produces sulfide deposits in the marine environment can also produce sulfide deposits in lakes. The major differences in terms of process are (1) in lakes the hydrotherma
Jan 1, 2001