manganese nodule

(redirected from Polymetallic nodule)
Also found in: Dictionary, Medical.

manganese nodule

[′maŋ·gə‚nēs ′naj·ül]
(geology)
Small, irregular black to brown concretions consisting chiefly of manganese salts and manganese oxide minerals; formed in oceans as a result of pelagic sedimentation or precipitation.
References in periodicals archive ?
Polymetallic nodules are much more widespread deposits.
111 DEEP SEA MINING OF POLYMETALLIC NODULES IN THE CENTRAL EASTERN PACIFIC AND KEEPING THE INTEGRITY OF THE ABYSSAL MARINE ENVIRONMENT
The first substantive actions were the approval of the plans of work submitted to the PrepComm by pioneer investors and the drafting and adoption of the first element of the "mining code"--the rules, regulations and procedures for prospecting and exploration for polymetallic nodules.
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.
Polymetallic nodules contain cobalt, manganese, copper, and nickel, in addition to small amounts of iron and aluminium as well as rare metals such as tellurium, molybdenum and titanium.
So it is polymetallic nodules in international waters that are covered by the 2000 regulation.
The licence will allow exploration for polymetallic nodules at a site within the Clarion-Clipperton Fracture Zone of the Pacific.
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.
The Assembly, in another decision, adopted amendments to the Regulations on Prospecting and Exploration for Polymetallic Nodules in the Area, as contained in the annex to the decision of the Council.
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.