マンガン瘤の研究

岡田 昭彦, 島 誠

doi:10.1007/bf02753889

マンガン瘤の研究

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岡田昭彦

理化学研究所
島誠

理化学研究所

書誌事項

タイトル別名

Study on the Manganese Nodule
マンガンリュウノケンキュウ
Study on the managanese nodule

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Chemical and X-ray analyses were performed on the fifteen manganese nodules collected from the Pacific Ocean floor. The results were discussed compared with the previous data on the manganese nodules. Minerals were found to be todorokite, δ-MnO₂ and other silicates, montmorillonite, illite, phillipsite and α-Si0₂. Average composition shows that copper is concentrated on the deep sea nodules more than the shallow ones, and that the todorokite rich nodules contain more copper and nickel than the δ-Mn0₂ rich ones. The analyses of fresh water iron-manganese precipitates by bacterial activity suggest that biological process is one of the important factors on the genesis of the sedimentary iron-manganese deposits, in cluding the manganese nodule.