manganese nodule

(redirected from Polymetallic nodule)
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manganese nodule

n
(Geological Science) geology a small irregular concretion found on deep ocean floors having high concentrations of certain metals, esp manganese
References in periodicals archive ?
1: The Polymetallic Nodule Ecosystem of the Eastern Equatorial Pacific Ocean.
In the polymetallic nodule areas of the central Eastern Pacific, two species of cosmopolitan distributed mobile epifauna holothurians dominate the abyssal ecosystem.
India has been granted a polymetallic nodule exploration licence near the Chagos, which Mauritius has laid claim to from the British.
16-20 September 2004 Development of a geological model of the polymetallic nodule resources in the Clarion-Clipperton Fracture Zone: workshop held in Nadi, Fiji.
Speaking at an ocean mining industry round table meeting held in Tokyo, Japan on 28 January 2014, Secretary-General Odunton said the first of a series of three workshops to develop a standardized taxonomy for megafauna associated with polymetallic nodule deposits was convened in 2013.
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.
Mr Burt said mining companies were already lining up for licences to mine for "potatosized" polymetallic nodules, which could be exploited for a widerange of minerals that can be used in telecoms technologies, as well as in the energy sector.
With this in mind, it is also important and useful that United Nations Regulations on Prospecting and Exploration for Polymetallic Nodules were agreed in the year 2000, covering the mining of the best known type of these mineral deposits.
In 2012, The International Seabed Authority entered into a 15-year exploration contract with Nautilus Minerals subsidiary, Tonga Offshore Mining Limited (TOML) for exploration for polymetallic nodules in the Clarion-Clipperton Fracture Zone.
Its first contract for exploration for polymetallic nodules in the Clarion Clipperton Fracture Zone was signed in June 2001.
Apart from knowledge acquisition and capacity building in the area of manned deep sea vehicle development, the manned submersible, with scientists onboard with suitable observation and intervention devices, can be a tool for exploration of mineral resources of the ocean like polymetallic nodules, cobalt enriched ferromanganese crust, polymetallic sulphides, hydrothermal vents, gas hydrates; exploration of deep-sea life forms; observation, intervention and engineering support for underwater activities; and underwater search and recovery operations.