Show simple item record

dc.contributor.authorNath, B.N.
dc.contributor.authorBorole, D.V.
dc.contributor.authorAldahan, A.
dc.contributor.authorPatil, S.K.
dc.contributor.authorMascarenhas-Pereira, M.B.L.
dc.contributor.authorPossnert, G.
dc.contributor.authorEricsson, T.
dc.contributor.authorRamaswamy, V.
dc.contributor.authorGupta, S.M.
dc.date.accessioned2008-05-14T10:20:44Z
dc.date.accessioned2017-09-30T03:07:59Z
dc.date.available2008-05-14T10:20:44Z
dc.date.available2017-09-30T03:07:59Z
dc.date.issued2008
dc.identifier.citationGeophysical Research Letters, vol.35(9):L09603; 2008; doi:10.1029/2008GL033849, 6pp
dc.identifier.issn0094-8276
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/7588
dc.description.abstractIsotopic (sup(210)Pb, sup(238)U-sup(230)Th, sup(10)Be), major and trace elements, and micromorphological and microchemical data, were used to identify recent (approx. 100 yrs) hydrothermal alteration of a greater than 200 kyr sedimentary record from the flank of a seamount in the Central Indian Basin located at the edge of the 75 degrees 30 minutes E fracture zone. Alteration effects are also reflected in 1) the depleted sedimentary organic carbon, 2) dissolution features of radiolarian skeletons, 3) the presence of altered minerals such as smectite and zeolites, and 4) distinctly different magnetic properties in the altered sediments. A predominant influence of neutral chloride type hydrothermal fluids is interpreted. This is the first report of recently occurring sediment alteration by shallow circulating sub-surface fluids along the Indian Ocean intra-plate seamount environment.
dc.languageen
dc.publisherWiley
dc.relation.ispartofGeophys Res Lett
dc.relation.isreferencedbySCI
dc.subject.othersediments
dc.subject.otherlead isotopes
dc.subject.otherthorium isotopes
dc.subject.otherberyllium isotopes
dc.subject.othersediments
dc.subject.otherdegassing
dc.subject.otherhydrothermal alteration
dc.subject.othermineral composition
dc.subject.otherhydrothermal solutions
dc.subject.otherISW, Central Indian Ocean Basin
dc.title210Pb, 230Th, and 10Be in Central Indian Basin seamount sediments: Signatures of degassing and hydrothermal alteration of recent origin
dc.typeJournal Article
dc.affiliation.authorCSIR-National Institute of Oceanography, Dona Paula, Goa, India


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record