--> Abstract: Structural Setting and Hydrocarbon Prospects of Son-Mahanadi Gondwana Basin, India - Emphasis on the Son Graben, by S. Dotiwala and K. K. S. Pangtey; #90942 (1997).

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Abstract: Structural Setting and Hydrocarbon Prospects of Son-Mahanadi Gondwana Basin, India - Emphasis on the Son Graben

DOTIWALA, SUCHETA, K.K.S. PANGTEY, KDMIPE

The Son-Mahanadi basin is one of the largest intra-cratonic Gondwana rift basins of India, oriented in a northwest-southeast direction and bounded to the north by the Narmada-Son Fault. A complete Gondwana sequence from Lower Permian (Talchir Formation) to Turonian (Lameta Formation) is present. Tectonically the basin has been divided into three blocks, each separated from the next by a prominent basement ridge trending ENE-WSW. The blocks from north to south are Son Graben, Hasdo-Arad High and Mahanadi Graben.

Spatial distribution of rock units, variation in the thickness of sediments, different disposition of structural elements and contrasting lineament-trends of the three blocks suggest that each underwent a different sedimentation and tectonic history.

The Son Graben has the maximum sediment thickness and a structural setup favorable for targeting of hydrocarbons, as compared to the other blocks. The Son Graben is a gentle northwesterly dipping monocline, in a half graben setting. Remote sensing has been used to identify subtle structural details which can be of significance for exploration. A number of broad and faulted structures are identified in the alluvium-covered area. This interpretation has been integrated with geophysical and geochemical data to bring out the hydrocarbon prospectivity of the Son Graben.

AAPG Search and Discovery Article #90942©1997 AAPG International Conference and Exhibition, Vienna, Austria