Show simple item record

dc.contributor.authorBalaram, V.
dc.contributor.authorBanakar, V.K.
dc.contributor.authorSubramanyam, K.S.V.
dc.contributor.authorRoy, P.
dc.contributor.authorSatyanarayan, M.
dc.contributor.authorRamMohan, M.
dc.contributor.authorSawant, S.S.
dc.date.accessioned2013-02-01T09:23:52Z
dc.date.available2013-02-01T09:23:52Z
dc.date.issued2012
dc.identifier.citationCurrent Science, vol.103; 2012; 1334-1338
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/4226
dc.description.abstractCobalt-rich Fe-Mn crusts occur on almost all seamounts and plateaus of the world oceans. Fe-Mn crusts are formed through layer-by-layer accretion of colloidal precipitates from cold ambient seawater onto exposed seamount rock substrates. This study reports high concentrations of rare earth elements (REE) and yttrium ranging from 1,727 to 2,511 mu g/g in the crust samples collected from the Afanasy Niktin Seamount (ANS) in the Eastern Equatorial Indian Ocean. The concentrations of REE in the ANS Fe-Mn crusts are much higher than those of the mid-Pacific seamount and nodules (1,180-1,434 mu g/g). Ce-enrichment up to 0.17 percent has been recorded in the present study as against approx. 0.1 percent content in global seamount Fe-Mn crusts. This enrichment is attributed to oxidative removal of Ce from seawater to the marine Fe-Mn crust. The negative Ce-anomalies obtained for seawater samples from the ANS region coupled with strong positive Ce-anomalies in Fe-Mn crusts clearly indicate that the source of Ce in ANS Fe-Mn crusts is sea-water. This investigation warrants further detailed exploration studies in order to make an estimate of these highly useful elements in the cobalt enriched Fe-Mn crusts of Indian Ocean.
dc.language.isoen
dc.publisherCurrent Science Association
dc.rightsCopyright [2012]. 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.subjectcobalt
dc.subjectseamounts
dc.subjectrare earths
dc.subjectyttrium
dc.subjectoceanic crust
dc.titleYttrium and rare earth element contents in seamount cobalt crusts in the Indian Ocean
dc.typeJournal Article


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record