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dc.contributor.authorPeketi, A.
dc.contributor.authorMazumdar, A.
dc.contributor.authorJoao, H.M.
dc.contributor.authorPatil, D.J.
dc.contributor.authorUsapkar, A.
dc.contributor.authorDewangan, P.
dc.date.accessioned2016-03-31T10:59:20Z
dc.date.accessioned2017-09-30T03:12:36Z
dc.date.available2016-03-31T10:59:20Z
dc.date.available2017-09-30T03:12:36Z
dc.date.issued2015
dc.identifier.citationGeochemistry Geophysics Geosystems, vol.16(9); 2015; 2865-2883
dc.identifier.issn1525-2027
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/7653
dc.description.abstractIn the present study, we have investigated the C-S-Fe systematics in a sediment core (MD161-13) from the Krishna-Godavari (K-G) basin, Bay of Bengal he core covers the late Holocene period with high overall sedimentation rate of 573 cm kyr 21 . Pore fluid chemical analyses indicate that the depth of the present sulfate methane transition zone (SMTZ) is at 6 mbsf. The (DTA 1 DCa 1 DMg)/DSO 22 4 ratios suggest that both organoclastic degradation and anaerobic oxidation of methane (AOM) drive sulfate reduction at the study site. The positive correlation between total organic carbon content (TOC) and chro- mium reducible sulfur (CRS) content indicates marked influence of organoclastic sulfate reduction on sulfid- ization. Coupled occurrence of 34 S-enriched iron sulfide (pyrite) with 12 C-enriched authigenic carbonate zones is the possible records of paleo-sulfate methane transition zones where AOM-driven-focused sulfate reduction was likely fueled by sustained high methane flux from underlying gas-rich zone. Aluminum nor- malized poorly reactive iron (Fe PR /Al) and La/Yb ratios suggest increasing contribution from Deccan basalts relative to that of Archean-Proterozoic granitic complex in sediment flux of Krishna-Godavari basin during the last 4 kyr
dc.languageen
dc.publisherWiley
dc.relation.ispartofGeochem Geophy Geosy
dc.relation.isreferencedbySCI
dc.subjectGeology and Geophysics
dc.subject.otherGeochemistry
dc.subject.otherSedimentation
dc.subject.otherISW, India
dc.titleCoupled C-S-Fe geochemistry in a rapidly accumulating marine sedimentary system: Diagenetic and depositional implications
dc.typeJournal Article
dc.affiliation.authorCSIR-National Institute of Oceanography, Dona Paula, Goa, India


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