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Resource/Reserve Estimation Of Marine Diamond Deposits
By Luc Rombouts
The resources and reserves calculation of marine diamond deposits should be based on a systematic sampling grid. The distribution of the sample grade results tends to be very skew and has a large vari
Jan 1, 1998
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Sand Mining For The Restoration Of Waikiki Beach
By Michael J. Cruickshank
The State of Hawaii has expressed concern over deterioration of the tourist beaches at Waikiki, which are becoming seriously depleted of sand. In this report the options for acquisition, transportatio
Jan 1, 1991
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Marine Survey Methodology Of The Surficial Geology And Morphology Of Northwestern Graham Island
By Brian D. Bornhold
A comprehensive multi-disciplinary marine geological survey of northwestern Graham Island, Queen Charlotte Islands, British Columbia, Canada was conducted by Offshore Survey and Positioning Services L
Jan 1, 1985
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Platinum And Palladium In Co-Rich Ferromanganese Crust Deposits
By B. Prause
Ferromanganese crust samples collected from Central Pacific sea-mount areas became of special interest after surprisingly high nobel metal contents have been analyzed. Hydrogenetic crust growth is con
Jan 1, 1989
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New Approaches To Mineral Exploration Off The Southwest Pacific Island Nations
By D. S. Cronan
Mineral exploration problems in the S.W. Pacific are not unique to that region, but a combination of favourable circumstances render it an ideal area to attempt to solve such problems. The land are
Jan 1, 1985
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Massive Sulfides from Ancient and Modern Margins of the Asian Paleo-ocean and Pacific: Textures, Mineralogy and Fluid Inclusion Data
By G. A. Tret’yakov, V. A. Simonov, I. Yu. Melekestseva, V. V. Zaykov, N. N. Ankusheva
The Kyzyl-Tashtyg massive sulfide polymetallic deposit is situated 120 km north-east of Kyzyl (the capital of Tuva Republic, Russia). It is located in the Ulug-O volcanic zone which is interpreted a
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Mineralogy Of Polymetallic Nodules In The Central Mexican Pacific
By Mayumy Amparo Cabrera-Ramírez
Polymetallic nodules are a widespread resource in the Pacific Ocean, particularly in the areas of Clarion-Clipperton (Cronan, 2000). The most abundant mineral phases are formed by iron and manganese o
Jan 1, 2011
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Modeling of Methane Plume Behavior in a Water Column
By Daisuke Monoe, Kisaburo Nakata, Rika Takeuchi, Tetsuo Yamazaki, Tomoaki Oomi, Tomohiko Fukushima
There are generally two methane passes in conjunction with the seafloor natural cold seepages, as is schematically shown in Fig. 1. The first pass consists of the coupled anaerobic oxidation of methan
Sep 24, 2006
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Waste Rejection on Seafloor by Slurry Flashing for Economic Seafloor Massive Sulfide Mining
By Yuta Yamamoto
Seafloor massive sulfides (SMS) which contain Au, Ag, Cu, Zn, and Pb have been interested in as a target of commercial mining these 15 years. Japan has large potential of SMS and a national R&D projec
Sep 14, 2011
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The Role of Bimodal Magmatism and its Products in Volcanogenic Massive Sulfide Ore-Forming Systems: A Case Study from the Middle Okinawa Trough, Japan
By Toru Yamasaki
"Bimodal lithostratigrafic assemblages are of significance in volcanogenic massive sulfide (VMS)-hosted lithology. The largest deposits are either bimodal-siliciclastic or maficsiliciclastic, and the
Jan 1, 2017
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Gold Mineralization in Ancient and Modern Massive Sulfide Deposits Associated with Ultramafic Rocks
By I. Yu. Melekestseva, V. V. Zaykov
Paleooceanic structures of the Urals fold belt contain different volcanic-hosted massive sulfide deposits of the Urals, Kuroko and Cyprus types [Prokin, Buslaev, 1999]. Small Cobearing massive sulfid
Aug 24, 2006
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Mineralogy and Chemistry of Ferromanganese Nodules in the Campbell Nodule Field
By Hunsoo Choi, Sung Rock Lee, Ian J. Graham, Ian C. Wright
This is a part of the joint KIGAM-GNS-NIWA 3-year study of ferromanganese modules in the Campbell Nodule Field, east of Campbell Plateau to determine age distribution, growth rates and geochemical evo
Aug 24, 2006
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Hydrogenetic Fe-Mn Crusts From The Atlantic And Pacific Oceans: Geological Evolution And Conditions Of Formation
By Irina A. Pulyaeva
Hydrogenetic Fe-Mn crusts are ubiquitous in the ocean basins and play an important role in marine mineral-deposit research because of their widespread occurrence and high concentrations of valuable an
Jan 1, 2011
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Cobalt-Rich Crust Continuum Of Seamounts In The Central Pacific
By Alexander Malahoff
Accumulation of cobalt -rich ferromanganese crusts on Pacific seamounts located off-ridge in the Hawaiian EEZ, represents a complex process that involves geologic aging of the seamounts, geographic tr
Jan 1, 1991
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A New Concept Of Easy Pre-Site Survey Method Of Deep Sea Hydrothermal Deposits
By Shinichi Takagawa
The deep sea hydrothermal deposits are one of the most prospecting resources, and various works to develop these mines are now underway. There are also various methods for the pre-site survey of th
Jan 1, 2011
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Polymetallic Nodules as a Future Deep Sea Mineral Resource
By U. Schwarz-Schampera, C. Rühlemann, H. -R. Kudrass
Within 2006 BGR will conclude a contract with the UN International Seabed Authority (ISA) for the exploration of polymetallic nodules. The contract covers an area in the Pacific nodule belt between th
Aug 24, 2006
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Application of Radiometric Dating Methods to Modern Seafloor Volcanic Massive Sulfide Deposits: Insights into Hydrothermal Processes
By Robert G. Ditchburn, Cornel E. J. de Ronde, Bernard J. Barry
The age of mineralization, its mode of formation, the time elapsed to amass an economic deposit, its capacity for sustainable extraction and, ultimately, its grade and tonnage, are key aspects in th
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MARTEMIS – An Electromagnetic Coil System for the Detection of Buried Seafloor Massive Sulfides
By S. Hölz, M. Jegen, K. Reeck, A. Haroon
Past investigations of seafloor massive sulfides (SMS) focused on actively forming sites. New technologies are needed to explore for SMS deposits which have finished their active phase and are possibl
Jan 1, 2018
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Submarine Hydrothermal Activity and Mineralization on the Kurile and Western Aleutian Island Arcs, NW Pacific
By T. Semkova, G. Cherkashov, V. Rashidov, L. Anikeeva, G. Gavrilenko, G. Glasby
The Kurile Arc consists of at least 100 submarine volcanoes and 5 submarine calderas located mainly in the rear arc (Figure 1). The arc is seismically very active, particularly in the south, and is
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The Escanaba Trough, Southern Gorda Ridge: Sulfide Deposits And Hydrothermal Processes At A Sediment-Covered Spreading Axis Within The U.S. Exclusive Economic Zone
By Randolph A. Koski
Since 1985, numerous constructional sulfide-sulfate deposits in the form of mounds, pinnacles, chimneys, and sheets have been located between 40°45' and 41°05'N latitude in Escanaba Trough,
Jan 1, 1988