dc.contributor.author | Peketi, A. | |
dc.contributor.author | Mazumdar, A. | |
dc.contributor.author | Joao, H.M. | |
dc.contributor.author | Patil, D.J. | |
dc.contributor.author | Usapkar, A. | |
dc.contributor.author | Dewangan, P. | |
dc.date.accessioned | 2016-03-31T10:59:20Z | |
dc.date.accessioned | 2017-09-30T03:12:36Z | |
dc.date.available | 2016-03-31T10:59:20Z | |
dc.date.available | 2017-09-30T03:12:36Z | |
dc.date.issued | 2015 | |
dc.identifier.citation | Geochemistry Geophysics Geosystems, vol.16(9); 2015; 2865-2883 | |
dc.identifier.issn | 1525-2027 | |
dc.identifier.uri | http://drs.nio.org/drs/handle/2264/7653 | |
dc.description.abstract | In 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.language | en | |
dc.publisher | Wiley | |
dc.relation.ispartof | Geochem Geophy Geosy | |
dc.relation.isreferencedby | SCI | |
dc.subject | Geology and Geophysics | |
dc.subject.other | Geochemistry | |
dc.subject.other | Sedimentation | |
dc.subject.other | ISW, India | |
dc.title | Coupled C-S-Fe geochemistry in a rapidly accumulating marine sedimentary system: Diagenetic and depositional implications | |
dc.type | Journal Article | |
dc.affiliation.author | CSIR-National Institute of Oceanography, Dona Paula, Goa, India | |