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    Comparison of internal features and microchemistry of ferromanganese crusts from the Central Indian Basin

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    Geo-Mar_Lett_11_44.pdf (568.9Kb)
    Date
    1991
    Author
    Iyer, S.D.
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    Abstract
    SEM/probe analyses of two ferromanganese crusts from the Central Indian Basin, formed on basalt substrate, reveal botryoids and cusps. The botryoids composed of delta-MnOs2, are enriched in Co, and the cusps and laminations with todorokite are enriched in Ni and Cu. Microstructural and elemental variations, from the ferromanganese crust outer surface to the basalt substrate, probably reflect changes in the accretion or in the source of metals. The major source of the crust metals in seawater, as indicatEd. by the Mn/Fe ratio of unity and by the microstructures.
    URI
    http://drs.nio.org/drs/handle/2264/3259
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