Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

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A Study of Geological Setting of Northeastern Part of Chhattisgarh Basin, Mahanadi Graben and Bilaspur-Raigarh-Surguja Gneissic Belt from Gravity Anomalies


Affiliations
1 Department of Geophysics, Banaras Hindu University, Varanasi - 221 005, India
2 National Geophysical Research Institute, Hyderabad - 560 007, India
     

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Gravity survey was conducted in an area of about 13000 sq km covering northeastern part of Chhattisgarh Basin, Bilaspur-Raigarh gneissic belt and the central part of Mahanadi graben. Analysis of gravity anomalies has helped in the demarcation of the boundary of Chhattisgarh Basin and Mahanadi graben as well as in the determination of extent of basins and associated structures. The thickness of sediments in Chhattisgarh Basin and Mahanadi graben is estimated to be 3 5 km and 2 5 km respectively above the crystalline basement. Two prominent gravity high closures in the vicinity of Bilaspur and Akaltra are new findings and are attributed to presence of high density metamorphic schist belt below the Chhattisgarh Basin.

Keywords

Gravity Method, Graben, Schist, Gneissic Belt, Chhattisgarh Basin.
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  • A Study of Geological Setting of Northeastern Part of Chhattisgarh Basin, Mahanadi Graben and Bilaspur-Raigarh-Surguja Gneissic Belt from Gravity Anomalies

Abstract Views: 246  |  PDF Views: 2

Authors

C. L. Singh
Department of Geophysics, Banaras Hindu University, Varanasi - 221 005, India
T. Lal
Department of Geophysics, Banaras Hindu University, Varanasi - 221 005, India
A. Kumar
Department of Geophysics, Banaras Hindu University, Varanasi - 221 005, India
S. K. Prajapati
National Geophysical Research Institute, Hyderabad - 560 007, India

Abstract


Gravity survey was conducted in an area of about 13000 sq km covering northeastern part of Chhattisgarh Basin, Bilaspur-Raigarh gneissic belt and the central part of Mahanadi graben. Analysis of gravity anomalies has helped in the demarcation of the boundary of Chhattisgarh Basin and Mahanadi graben as well as in the determination of extent of basins and associated structures. The thickness of sediments in Chhattisgarh Basin and Mahanadi graben is estimated to be 3 5 km and 2 5 km respectively above the crystalline basement. Two prominent gravity high closures in the vicinity of Bilaspur and Akaltra are new findings and are attributed to presence of high density metamorphic schist belt below the Chhattisgarh Basin.

Keywords


Gravity Method, Graben, Schist, Gneissic Belt, Chhattisgarh Basin.