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dc.contributor.authorBanakar, V.K.
dc.contributor.authorNair, R.R.
dc.contributor.authorTarkian, M.
dc.contributor.authorHaake, B.
dc.date.accessioned2009-05-06T10:47:09Z
dc.date.available2009-05-06T10:47:09Z
dc.date.issued1993
dc.identifier.citationMarine Geology, Vol.110; 393-402p.
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/2855
dc.description.abstractA detailed study of a nodule from the Somali Basin datEd. by sup(230)Th sub(excess) was correlated with the paleoceanographic events recorded in Site 236 (Leg 24) Deep Sea Drilling Project (DSDP) cores. Tentative indications are that the phase of nodule accretion starting with the development of pillar structure at a depth of 20 mm in the nodule around 13 Ma coincides with increased Antarctic Bottom Water (AABW) flow and an elevated calciumcarbonate compensation depth (CCD). The Late Miocene lowering of the CCD is representEd. by the mottled zones between 8 and 18 mm in the nodule is characterisEd. by an abundant silicate component (> 20%) of aeolian origin. The Miocene/Pliocene boundary (5 Ma) occurs at a depth of about 8 mm and is representEd. by the development of pillar structure and minimum of aeolian dust (10.3%). The increased biological productivity of the Somali surface water since the Middle Miocene is demonstratEd. by the increasing C sub(org) content of the nodule (from 0.11 to 0.19%) towards its surface
dc.language.isoen
dc.publisherElsevier
dc.rightsCopyright [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.subjectferromanganese nodules
dc.subjectpalaeoceanography
dc.subjectneogene
dc.subjectcores
dc.subjectgeochemistry
dc.subjectcorrelation analysis
dc.titleNeogene oceanographic variations recorded in manganese nodules from the Somali Basin
dc.typeJournal Article


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