manganese nodule

(redirected from Polymetallic nodules)
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manganese nodule

a small node produced by microbial reduction of manganese oxides.
References in periodicals archive ?
Caption: Polymetallic nodules (left)--seen here with Psychropotes longicauda, a species of sea cucumber--dot the abyssal plains that cover nearly two-thirds of the earth's surface.
1: The Polymetallic Nodule Ecosystem of the Eastern Equatorial Pacific Ocean.
35) International Seabed Authority, The Regulations on Prospecting and Exploration For Polymetallic Nodules in the Area, ISBA/6/A/18, 13 July 2000.
29 July-2 August 2002 Standardization of Environmental Data and Information: Development of Guidelines: workshop, Kingston, Jamaica, June 25-29, 2001 Minerals other than Polymetallic Nodules of the International Seabed Area: workshop held in Kingston, Jamaica, June 26-30, 2000 Proposed Technologies for Deep Seabed Mining of Polymetallic Nodules: workshop held Kingston, Jamaica, August 3-6, 1999 Deep Seabed Polymetallic Nodule Exploration: Development of Environmental Guidelines: workshop held in Sanva, Hainan Island, People's Republic of China, 1-5 June 1998 TECHNICAL STUDIES AND REPORTS * Marine Mineral Resources: Scientific Advances and Economic Perspectives ISBN 976-610-712-2 * Global non-living resources on the extended continental shelf: Prospects at the year 2000.
According to Union Secretary of Earth Sciences Ministry Shailesh Nayak, the National Institute of Ocean Technology is developing a crawler to take up underwater sea mining below 6,000 metres for polymetallic nodule mining.
On 8 February 2013, the International Seabed Authority received an application for approval of a plan of work for exploration for polymetallic nodules in the Area from UK Seabed Resources Ltd.
He noted that ISA has adopted two sets of Regulations on Prospecting and Exploration for polymetallic nodules (in 2000) and for polymetallic sulphides (in 2010) in the Area, and is on the verge of adopting a third set of regulations on cobalt-rich ferromanganese crusts.