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dc.contributor.authorKocherla, M.
dc.contributor.authorMazumdar, A.
dc.contributor.authorKarisiddaiah, S.M.
dc.contributor.authorBorole, D.V.
dc.contributor.authorRao, B.R.
dc.date.accessioned2006-09-02T11:00:23Z
dc.date.available2006-09-02T11:00:23Z
dc.date.issued2006
dc.identifier.citationCurrent Science. vol.91(3), 318-323p.
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/347
dc.description.abstractEvidences of anaerobic oxidation of methane and interstitial carbonate precipitation have been recorded in sediment cores from Krishna–Godavari basin, Andhra Pradesh, India. High magnesian calcite and aragonite, typically associated with methane oxidation have been identified from the three studied cores. Down core sulphate reduction trend and presence of framboidal pyrites are definite evidences of anoxic diagenetic realm. Highly depleted carbon isotopic compositions of the handpicked carbonate crystals are suggestive of anaerobic oxidation of methane (AOM). In this work a biogenic methane source has been tentatively concluded. Presence of certain geophysical features, viz. bottom simulating reflector, gas charged sediments and pock-marked sea floor are suggestive of possible methane gas hydrate as methane source. However, an early diagenetic methane source is also a possibility in the present scenario. Further studies are in progress for comprehensive understanding of the processes involved.
dc.format.extent275456 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherIndian Academy of Sciences
dc.subjectanaerobic oxidation
dc.subjectKrishna–Godavari basin
dc.titleEvidences of methane-derived authigenic carbonates from the sediments of the Krishna–Godavari Basin, eastern continental margin of India
dc.typeJournal Article


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