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Title: Offshore Extension of Deccan Traps in Kachchh, Central Western India: Implications for Geological Sequestration Studies

Abstract

The Deccan basalts in central western India are believed to occupy large onshore-offshore area. Using geophysical and geological observations, onshore sub-surface structural information has been widely reported. On the contrary, information about offshore structural variations has been inadequate due to scarcity of marine geophysical data and lack of onshore-offshore lithological correlations. Till date, merely a few geophysical studies are reported that gauge about the offshore extent of Deccan Traps and the Mesozoic sediments (pre-Deccan). To fill this gap in knowledge, in this article, we present new geophysical evidences to demonstrate offshore continuation of the Deccan volcanics and the Mesozoic sediments. The offshore multi-channel seismic and onshore-offshore lithological correlations presented here confirm that the Mesozoic sedimentary column in this region is overlain by 0.2-1.2-km-thick basaltic cover. Two separate phases of Mesozoic sedimentation, having very distinctive physical and lithological characteristics, are observed between overlying basaltic rocks and underlying Precambrian basement. Using onshore-offshore seismic and borehole data this study provides new insight into the extent of the Deccan basalts and the sub-basalt structures. This study brings out a much clearer picture than that was hitherto available about the offshore continuation of the Deccan Traps and the Mesozoic sediments of Kachchh. Further, its implicationsmore » in identifying long-term storage of anthropogenic CO{sub 2} within sub-basalt targets are discussed. The carbon sequestration potential has been explored through the geological assessment in terms of the thickness of the strata as well as lithology.« less

Authors:
 [1];  [2]
  1. IITM, Centre for Climate Change Research (India)
  2. National Centre for Antarctic and Ocean Research (India)
Publication Date:
OSTI Identifier:
22043930
Resource Type:
Journal Article
Journal Name:
Natural Resources Research (New York, N.Y.)
Additional Journal Information:
Journal Volume: 20; Journal Issue: 1; Other Information: Copyright (c) 2011 International Association for Mathematical Geology; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1520-7439
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; BASALT; CARBON DIOXIDE; CARBON SEQUESTRATION; CORRELATIONS; GEOPHYSICS; INDIA; LITHOLOGY; SEDIMENTATION; SEDIMENTS; SURFACES; VARIATIONS

Citation Formats

Pandey, D. K., E-mail: pandey@ncaor.org, Pandey, A, and Rajan, S. Offshore Extension of Deccan Traps in Kachchh, Central Western India: Implications for Geological Sequestration Studies. United States: N. p., 2011. Web. doi:10.1007/S11053-010-9133-X.
Pandey, D. K., E-mail: pandey@ncaor.org, Pandey, A, & Rajan, S. Offshore Extension of Deccan Traps in Kachchh, Central Western India: Implications for Geological Sequestration Studies. United States. https://doi.org/10.1007/S11053-010-9133-X
Pandey, D. K., E-mail: pandey@ncaor.org, Pandey, A, and Rajan, S. 2011. "Offshore Extension of Deccan Traps in Kachchh, Central Western India: Implications for Geological Sequestration Studies". United States. https://doi.org/10.1007/S11053-010-9133-X.
@article{osti_22043930,
title = {Offshore Extension of Deccan Traps in Kachchh, Central Western India: Implications for Geological Sequestration Studies},
author = {Pandey, D. K., E-mail: pandey@ncaor.org and Pandey, A and Rajan, S},
abstractNote = {The Deccan basalts in central western India are believed to occupy large onshore-offshore area. Using geophysical and geological observations, onshore sub-surface structural information has been widely reported. On the contrary, information about offshore structural variations has been inadequate due to scarcity of marine geophysical data and lack of onshore-offshore lithological correlations. Till date, merely a few geophysical studies are reported that gauge about the offshore extent of Deccan Traps and the Mesozoic sediments (pre-Deccan). To fill this gap in knowledge, in this article, we present new geophysical evidences to demonstrate offshore continuation of the Deccan volcanics and the Mesozoic sediments. The offshore multi-channel seismic and onshore-offshore lithological correlations presented here confirm that the Mesozoic sedimentary column in this region is overlain by 0.2-1.2-km-thick basaltic cover. Two separate phases of Mesozoic sedimentation, having very distinctive physical and lithological characteristics, are observed between overlying basaltic rocks and underlying Precambrian basement. Using onshore-offshore seismic and borehole data this study provides new insight into the extent of the Deccan basalts and the sub-basalt structures. This study brings out a much clearer picture than that was hitherto available about the offshore continuation of the Deccan Traps and the Mesozoic sediments of Kachchh. Further, its implications in identifying long-term storage of anthropogenic CO{sub 2} within sub-basalt targets are discussed. The carbon sequestration potential has been explored through the geological assessment in terms of the thickness of the strata as well as lithology.},
doi = {10.1007/S11053-010-9133-X},
url = {https://www.osti.gov/biblio/22043930}, journal = {Natural Resources Research (New York, N.Y.)},
issn = {1520-7439},
number = 1,
volume = 20,
place = {United States},
year = {Tue Mar 15 00:00:00 EDT 2011},
month = {Tue Mar 15 00:00:00 EDT 2011}
}