Article

 

Composition and origin of authigenic carbonates in the Krishna-Godavari and Mahanadi Basins, eastern continental margin of India Public Deposited

Downloadable Content

Download PDF
https://ir.library.oregonstate.edu/concern/articles/2f75r949g

To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The published article is copyrighted by Elsevier and can be found at:  http://www.journals.elsevier.com/marine-and-petroleum-geology/.

Descriptions

Attribute NameValues
Creator
Abstract
  • The mineralogical and stable isotopic composition of authigenic carbonates from the Krishna-Godavari (KG) and Mahanadi Basin provide a deeper insight into the processes inducing carbonate formation in the sediments of the eastern continental margin of India in the Bay of Bengal. Authigenic carbonate cements, (micro) nodules, bioturbation casts and tubes from 12 core locations drilled during the Indian National Gas Hydrate Program (NGHP) Expedition 01 were investigated for this study. Three main processes responsible for authigenic carbonate precipitation are identified: organoclastic sulfate reduction, anaerobic oxidation of methane and methanogenesis. Evidence of vigorous methane seepage is indicated in carbonates recovered at Sites 7, 10, 12 (KG Basin) and 19 (Mahanadi Basin). These methane-derived carbonates display typical paragenetic carbonate mineralogies (aragonite, high-Mg calcite with >15 Mol% MgCO₃, Ca-rich dolomite). Two separate horizons of methane derived-carbonates are correlated between 4 drill holes (up to ~16 km apart). The upper horizon has been dated with ¹⁴C (40,100-51,600 a BP 1950) and clearly indicates that methane seepage has been much more vigorous in the past, possibly due to the effect of lower sea level on the gas hydrate stability zone across the margin.
Resource Type
DOI
Date Available
Date Issued
Citation
  • Teichert, B. M. A., Johnson, J. E., Solomon, E. A., Giosan, L., Rose, K., Kocherla, M., ... & Torres, M. E. (2014). Composition and origin of authigenic carbonates in the Krishna–Godavari and Mahanadi Basins, eastern continental margin of India. Marine and Petroleum Geology, 58, 438-460. doi:10.1016/j.marpetgeo.2014.08.023
Journal Title
Journal Volume
  • 58
Keyword
Rights Statement
Funding Statement (additional comments about funding)
  • This research was also supported by the U.S. Geological Survey (Contract #07CRSA0708) and by the NSF (OCE-0753487). Much of the drilling/coring equipment used was provided by the Integrated Ocean Drilling Program (IODP) through a loan agreement with the US National Science Foundation. The financial support for the NGHP01, from the Oil Industry Development Board, Oil and Natural Gas Corporation Ltd., GAIL (India) Ltd. and Oil India Ltd. is gratefully acknowledged. We also acknowledge the support extended by all the participating organizations of the NGHP: MoP&NG, DGH, ONGC, GAIL, OIL, NIO, NIOT, and RIL.
Publisher
Peer Reviewed
Language
Replaces
Additional Information
  • description.provenance : Approved for entry into archive by Erin Clark(erin.clark@oregonstate.edu) on 2016-02-25T16:08:13Z (GMT) No. of bitstreams: 1 TorresMECEOASCompositionOriginAuthigenic.pdf: 3574005 bytes, checksum: 1a52ce99fd70e1547cda711799aa1e1e (MD5)
  • description.provenance : Made available in DSpace on 2016-02-25T16:08:13Z (GMT). No. of bitstreams: 1 TorresMECEOASCompositionOriginAuthigenic.pdf: 3574005 bytes, checksum: 1a52ce99fd70e1547cda711799aa1e1e (MD5) Previous issue date: 2014-12
  • description.provenance : Submitted by Erin Clark (erin.clark@oregonstate.edu) on 2016-02-25T16:07:50Z No. of bitstreams: 1 TorresMECEOASCompositionOriginAuthigenic.pdf: 3574005 bytes, checksum: 1a52ce99fd70e1547cda711799aa1e1e (MD5)

Relationships

Parents:

This work has no parents.

Items