manganese nodule

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manganese nodule

a small node produced by microbial reduction of manganese oxides.
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
2) The practical opportunity for proposing a completely new regime was given by the technological developments which were expected to allow in a relatively short time the commercial exploitation of polymetallic nodules lying on the surface of the deep seabed and containing minerals such as manganese, nickel, cobalt and copper.
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.
Polymetallic nodule composition Typical constituents of interest (by weight) Manganese * 30% Iron 6% Silicon 5% Aluminum * 1.
This exclusive mining property is located at the C-C fracture zone in the East Pacific, 4900-5400 m deep, and it is estimated to contain over 420M mt polymetallic nodules, 112M mt manganese, 4.
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 far, it has issued 15-year contracts for exploration of polymetallic nodules, polymetallic sulphides and cobalt-rich ferromanganese crusts in the deep seabed to 26 contractors--but few are as far advanced as the Canadian firm.
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.
Seeking to rely on the sponsorship provisions of the LOS Convention, on 10 April 2008 two Pacific island developing states, Nauru and Tonga, applied to ISBA for approval to obtain contracts to explore for polymetallic nodules.