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 ?
Deep-sea nematode assemblage has not recovered 26 years after experimental mining of polymetallic nodules (Clarion-Clipperton Fracture Zone, Tropical Eastern Pacific).
The main environmental impacts of mining polymetallic nodules are expected at the seafloor, with less intense and persistent effects in the water column.
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.
The resources of the Area are limited to << all solid, liquid or gaseous mineral resources in-situ in the Area at or beneath the sea-bed, including polymetallic nodules >> (Art.
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.
In terms of safety, he says that harvesting polymetallic nodules carries far fewer risks than offshore oil and gas production.
Polymetallic nodules (also known as manganese nodules) are potato-shaped, largely porous nodules found in abundance carpeting the sea floor of world oceans in deep sea.
This marks the 16th exploration deal for polymetallic nodules in the CCZ.
The licence will allow exploration for polymetallic nodules at a site within the Clarion-Clipperton Fracture Zone of the Pacific.
In his address, the ISA Secretary-General spoke on the various functions of the Authority and its work on the applications for approval of plans of work for exploration for the three types of mineral resources in the Area (applications), the on-going work by contractors for exploration in the Area (contracts), the status of current work on the preparation of an exploitation code for deep seabed polymetallic nodules mining, capacity building, and marine environmental protection.
The Commission has, since its inception developed the Regulations on Prospecting and Exploration for Polymetallic Nodules in the Area; the Regulations on Prospecting and Exploration for Polymetallic Sulphides in the Area and the Regulations on Prospecting and Exploration for Cobalt-Rich Ferromanganese Crusts in the Area.
On 27 December 2013, the Cook Islands Investment Corporation (CIIC), which is a Cook Islands state enterprise, submitted an application for approval of a plan of work for exploration for polymetallic nodules in a reserved area.