Evidences of methane-derived authigenic carbonates from the sediments of the Krishna–Godavari Basin, eastern continental margin of India
IR@NIO: CSIR-National Institute Of Oceanography, Goa
View Archive Info| Field | Value | |
| Creator |
Kocherla, M.
Mazumdar, A. Karisiddaiah, S.M. Borole, D.V. Rao, B.R. |
|
| Date |
2006-09-02T11:00:23Z
2006-09-02T11:00:23Z 2006 |
|
| Identifier |
Current Science. vol.91(3), 318-323p.
http://drs.nio.org/drs/handle/2264/347 |
|
| Description |
Evidences 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.
|
|
| Format |
275456 bytes
application/pdf |
|
| Language |
en
|
|
| Publisher |
Indian Academy of Sciences
|
|
| Subject |
anaerobic oxidation
Krishna–Godavari basin |
|
| Title |
Evidences of methane-derived authigenic carbonates from the sediments of the Krishna–Godavari Basin, eastern continental margin of India
|
|
| Type |
Article
|
|