Ferromanganese micronodules from Bengal Fan

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dc.contributor.author Chauhan, O.S.
dc.contributor.author Gujar, A.R.
dc.contributor.author Rao, Ch.M.
dc.date.accessioned 2009-05-06T10:47:09Z
dc.date.available 2009-05-06T10:47:09Z
dc.date.issued 1993
dc.identifier.citation Giornale di Geologia, Vol.55; 3-9p.
dc.identifier.uri http://drs.nio.org/drs/handle/2264/2854
dc.description.abstract The occurrence of ferromanganese micronodules, hitherto unreported from any fan-valley system of the world, has been recorded from over 0.22 million km sup(2) area located in the middle fan region of the Bay of Bengal. Their abundance is higher in the eastern bay than in the western bay. Botryoidal and spheroidal are the two dominant morphological forms observed in the eastern and the western bay respectively. The bulk chemical analysis of the micronodules reveals that they have 24.1% Mn, depleted Fe (1.10%), Ni I0.089%), Zn (0.150%) and Co (0.01%), and a Mn/Fe ratio of 21.1. Todorokite in association with quartz, feldspar and phillipsite is observed in the nodules. The preliminary results suggest that Mn released from the smectite clay mineral and early diagenesis are the responsible for their formation
dc.language.iso en
dc.publisher Museo Geologico di Bologna
dc.rights Copyright [1993]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
dc.subject ferromanganese nodules
dc.subject fans
dc.subject chemical analysis
dc.subject manganese
dc.subject iron
dc.subject nickel
dc.subject zinc
dc.subject cobalt
dc.subject todorokite
dc.subject diagenesis
dc.title Ferromanganese micronodules from Bengal Fan
dc.type Journal Article


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