manganese nodule

(redirected from Polymetallic nodule)
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manganese nodule

a small node produced by microbial reduction of manganese oxides.
References in periodicals archive ?
Evidence supporting that view is already available: In 1978, scientists performing an experiment scooped polymetallic nodules from the CCZ and left a track in the sediments that was 1.
16) According to the ISA, polymetallic nodules are only profitable when the yield exceeds 10 kg/[m.
Deep-sea nematode assemblage has not recovered 26 years after experimental mining of polymetallic nodules (Clarion-Clipperton Fracture Zone, Tropical Eastern Pacific).
While the authority has issued seven contracts for exploration for polymetallic nodules, it has not had experience with exploitation, nor has it gained experience in overseeing the exploration or exploitation of other minerals, notably cobalt crusts and polymetallic sulfides.
The existence of rules, regulations and procedures for exploring polymetallic nodules, the impending rules for sulfides and cobalt crusts and the process for developing and approving contracts for development provide the procedural basis to ensure that deep seabed mineral development can begin with minimal delay after metal markets rise in the future, to the benefit of both miners and consumers.
17) "Resolution II: Governing Preparatory Investment in Pioneer Activities Relating to Polymetallic Nodules," The Law of the Sea: United Nations Convention on the Law of the Sen (New York: United Nations, 1983), 177.
But these deposits are potentially valuable, the former containing commercially viable amounts of gold, silver, copper and zinc; and the latter being similar to polymetallic nodules, but with more cobalt.
For both regulations, similar environmental safeguards to the agreed regulation on polymetallic nodules have been drafted regarding the protection of sensitive marine ecologies that may be damaged by prospecting and exploration.
Under the exploration licence, OMS intends to conduct environmental studies and to survey for deposits of polymetallic nodules within the approved area.
In accordance with the Regulations on Prospecting and Exploration for Polymetallic Nodules in the Area, the members of the Legal and Technical Commission will be notified of the above application and consideration of this application will be placed on the agenda of the Commission at its next meeting, which is scheduled to commence on 3 February 2014.
In accordance with the Authority s Regulations on Prospecting and Exploration for Polymetallic Nodules in the Area, the members of the Legal and Technical Commission will be notified of the above applications and consideration of the application will be placed on the agenda of the Commission at its next meeting, which is scheduled to commence on 8 July 2013.
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.