manganese nodule

(redirected from Manganese nodules)
Also found in: Dictionary.

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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Engineered by the Ocean Management Inc (OMI) consortium, the $50 million venture netted 1000 tonnes of manganese nodules. A report claimed: "Perhaps an even bigger catch, however, was the clean bill of health the operation won from government scientists monitoring the environmental effects of scooping the potato-sized nodules from the ocean floor and shooting them up to the surface." (4) So far government agencies have dominated in exploring the feasibility of deep seabed mining.
He listed the major marine mineral deposits into three groups: SMS (seafloor massive sulphides), cobalt-rich crusts, and manganese nodules. The SOPAC statement said SMS deposits included high-grade copper, with significant enrichment in gold, silver, zinc and lead.