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Nodul mangan

Sebiji nodul mangan.

Nodul mangan atau nodul polilogam ialah suatu bebola batu yang dijumpai di dasar laut yang terdiri daripada lapisan hidroksida mangan dan besi pada suatu teras. Teras nodul mangan boleh terdiri daripada basalt, mikrofosil seperti protozoa Radiolaria ataupun apatit.[1]

Saiz nodul mangan adalah pelbagai, daripada bersaiz mikroskopik hingga melebihi 20 cm, tetapi lazimnya bersaiz daripada tiga ke 10 cm, serupa dengan saiz telur ayam. Tekstur nodul mangan juga adalah pelbagai, ada yang bertekstur kasar dan ada yang licin.

Nodul mangan, disebabkan oleh kewujudannya yang banyak serta komposisi logam berharganya telah disifatkan memiliki kepentingan ekonomi,[2] dan usaha-usaha pengekstratan nodul mangan telah dijalankan. Meskipun begitu, usaha-usaha ini telah diabaikan sejak 1970-an.[3]

  1. ^ Thomson, Wyville (1875). On the cruise of H.M.S. Challenger (dalam bahasa Inggeris). m/s. 39.
  2. ^ Mero, John (1965). The mineral resources of the sea. Elsevier Oceanography Series.
  3. ^ United Nations Ocean Economics and Technology Office, Technology Branch, United Nations (1978). Manganese Nodules: Dimensions and Perspectives. Marine Geology. 41. Springer. m/s. 343. Bibcode:1981MGeol..41..343C. doi:10.1016/0025-3227(81)90092-X. ISBN 978-90-277-0500-6.CS1 maint: multiple names: authors list (link)
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Nodul mangan
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