Discovery of the manganese nodule in ground water from the Oppu Mine, Aomori Prefecture, Japan

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  • 青森県尾太鉱山跡地の廃水中から発見されたマンガン団塊
  • アオモリケン オップコウザン アトチ ノ ハイスイ チュウ カラ ハッケン サレタ マンガン ダンカイ

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The authors found ground water origin manganese nodules which were been in the Oppu Mine in Aomori Prefecture, Japan. The manganese nodules have formed in less than 15 years. The manganese nodules sized between granule and pebble occurred with manganese crust in the well-developed seem microbe of mat materials. Microbe material are present in cores and surface of some manganese nodules. All of the manganese nodules were spherical and having layered structure which were classified into s-m[SDP]s or s-m[SDP]s+r types according to deep-sea manganese nodules form (Meylan 1974). The manganese nodules are existent with microbe materials suggesting the genetic relation to the microbe materials.

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