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Trace Elements In Massive Sulfides From The Semenov-2 Hydrothermal Field, 13º31´ N, Central Atlantic: ICP-MS And LA-ICP-MS Data
By Irina Melekestseva
The Cu-Zn massive sulfides from the basalt-hosted Semenov-2 hydrothermal field (13°31.13´ N, 44°59.03´ W, MAR) are enriched in Au (22?188 ppm) and Ag (127?1787 ppm) [Ivanov et al., 2008] and elevated
Sep 14, 2011
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Upscaling towards Deep-Sea Mining by Vertical Transport Experiments over 130 meter.
By S. C. W. de Jong, E. de Hoog, J. M. van Wijk, S. J. Dasselaar
Introduction Technology development for sustainable, safe, reliable and efficient mining of polymetallic nodules in the deep seas requires careful design, thorough understanding and integrated testing
Jan 1, 2018
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Heavy Minerals, Offshore Virginia: A Project Report
By C. H. Hobbs
A recently completed series of projects funded by the Commonwealth of Virginia and the U.S. Minerals Management Service was designed to assess the distribution of heavy minerals on the inner continent
Jan 1, 1988
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Pelagic Sediments Associated With Polymetallic Nodules In The Clarion Area Fracture Zone
By Marlene Olivares Cruz
The particles that make up the deep-sea sediments have two main sources: 1) those that are created in situ from dissolved components and 2) those that are washed into the ocean in solid phases from th
Jan 1, 2011
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Exploration and Estimation of Gravel Resource Potential in Southeast Chukchi Sea Continental Shelf Off Kivalina, Alaska
By S. Naidu, J. Kelley, Roger Amato
The Alaskan Continental Shelf covers 76 % of the total shelf area of the United States. There are a lot of potential gravel deposits in the Alaskan offshore region. The gravel resources are currentl
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Relative Assessments Of Manganese Nodules And Co-Rich Crusts In South Pacific EEZ's
By D. S. Cronan
Studies on polymetallic manganese nodules and Co-rich crusts in the EEZ's of the Cook, Line, Ellice and Phoenix Islands between 0-20°S show that Ni and Cu reach their greatest combined abundances
Jan 1, 1989
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New Morphological insights of the Fieberling Guyot, Northeast Pacific Ocean: Scales of Seafloor Mineral Exploration
By Brian Parsons
In June of 2013, Odyssey Marine Exploration conducted sea trials of the newly installed SeaBat 7150 full-ocean multibeam sonar system on the M/V Dorado Discovery over the Fierberling Guyot in the nort
Sep 14, 2011
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Nodules: Nineties & Beyond
By William Siapno
Manganese nodules, as metal ores, have for the most part been cast aside from further consideration within this century. However, in the decade of the 90s, rising demand at all levels of society, for
Jan 1, 1991
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Sediment Geochemistry Associated with Polymetallic Nodules in the Central Mexican Pacific
The chemical composition of the nodules varies with the type of manganese minerals and the size and characteristics of their nucleus, but those who have an economic interest have the following composi
Sep 14, 2011
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The Gorda Ridge Technical Task Force: A Cooperative Federal-State Approach To Offshore Mining Issues
By G. McMurray
The release by the U.S. Department of the Interior (DOI) of a Draft Environmental Impact Statement (DEIS) for the leasing of polymetallic sulfide minerals on the Gorda Ridge in December 1983 resulted
Jan 1, 1985
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Borehole Mining Technology For Underwater Application
By M. F. Dibble
The technology available for mining of underwater mineral resources such as placers and phosphorite, typically occurring with variable amounts of overburden, has remained largely unchanged for decades
Jan 1, 1986
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Mineralogical Characterization Of Southern Oregon Offshore Placers
By C. L. Mardock
The U. S. Bureau of Mines participated in a two-year joint State of Oregon/Department of Interior Placer Task Force study on the economic and environmental aspects of Oregon's marine placer depos
Jan 1, 1991
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Updated Economic Feasibility Analysis of Cobalt- rich Manganese Crust Mining Including the Substrate Rock Usage for Phosphates
By T. Yamazaki, T. Goto, R. Arai, N. Nakatani
The importance of cobalt-rich manganese crusts on the Pacific seamounts for possible future rare metal sources has been recognized these 30 years. The thin layer-type coverage and the micro-topographi
Jan 1, 2018
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Dating of Iron Oxide Crusts in the Study of Submarine Hydrothermal Events and Mineral Deposition ? Introduction
By Robert G. Ditchburn
The NW caldera hydrothermal vent field at Brothers volcano, of the Kermadec-Tonga arc, has associated massive sulfide mineralization. This includes an abundance of black smoker chimneys that contain s
Jan 1, 2010
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Arctic Ocean Fe-Mn Crusts and Nodules: A Genetic Model and Final Analyses
By Natalia Konstantinova, Kira Mizell, James R. Hein, Georgy Cherkashov, Amy Gartman, Mariah Mikesell
"Two types of metallic deposits have been found in the deep Arctic Ocean: Hydrothermal Fe, Cu, and Zn sulfide deposits form along Gakkel Ridge in the Eurasia Basin and associated ridges between Greenl
Jan 1, 2017
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Recent Developments; U.S. Atlantic Shelf Marine Mineral Surveys
By Andrew E. Grosz
The Atlantic Continental Shelf (ACS) of the United States includes about 391,000 km2 extending from the shoreline to the 200-m isobath. It varies in width from a fraction of a kilometer (offshore of s
Jan 1, 1988
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Nodule Types and Genetic Controls from the TOML Areas in the CCZ
By Christina Pomee, John Parianos
"TOML’s ISA Contract comprises six areas (A-F) that span from 118° to 152° W and from 7° to 15° N or over 70% of the CCZ.During a 2015 exploration cruise, TOML scientists found that the a logging syst
Jan 1, 2017
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Tellurium-Rich Ferromanganese Crusts
By James R. Hein
Ferromanganese oxyhydroxide crusts (Fe-Mn crusts) precipitate out of cold ambient seawater onto hard-rock surfaces at water depths of about 600-4000 m throughout the ocean basins. Fe-Mn crusts concen
Jan 1, 2000
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Advances In Seabed Mapping And Sediment Profiling Technology
By Freddy Pøhner
The paper describes recent advances in the technology for mapping of the seabed with acoustic instrumentation. These instruments are typically single beam echo sounders, multibeam echo sounders and hi
Jan 1, 2003
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Melt Inclusions in Brothers Dacite Reveal Metal Transporting Mechanisms
By Ian J. Graham
Brothers volcano, in the southern Kermadec Arc, is host to two hydrothermal vent fields with very different geology, permeability, vent fluid compositions and mineralogy (see de Ronde et al. and Ditch
Jan 1, 2010