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- W2187050462 abstract "Satpura Gondwana Basin is located over the Pachmarhi plateau of Central Indian Tectonic Zone (CITZ) in central India. Its exposition at an unexpected height of 900 m above the granite-gneiss basement rocks encompassing the Pachmarhi plateau distinguishes it from other Gondwana basins of peninsular India. The complete Bouguer anomaly map of the region is characterized by a broad relative gravity low over Satpura Gondwana Basin and high over the CITZ as compared to the adjoining regions. 2½-D gravity modelling across the Satpura Basin, constrained by deep seismic sounding and available well log data, was carried out. Our study establishes more than 5 km thick Gondwana sediments deposited in a fault controlled basin and high density Palaeoproterozoic Mahakoshal belt as a horst along the Precambrian suture between the CITZ and the Bundelkhand craton. Our results also support the earlier studies that have suggested probable presence of about 5 km thick Mesoproterozoic Vindhyan sediments, believed to have been deposited on the southern margin of Bundelkhand Craton as a foreland basin during the convergence phase. Besides a high density (2.91 g/cm 3 ) mid-crustal body, a velocity (6.50 km/s)/density (2.91 g/cm 3 ) layer at the base of the crust and relatively lower velocity (7.9 km/s)/density (3.22 g/cm 3 ) subcrustal mantle are also delineated beneath the region. Complex crustal structure with anomalous velocity/density layers beneath the CITZ suggests probable magmatic underplating due to Deccan volcanism. It is suggested that the Satpura Gondwana Basin, formed as drop down basin over the CITZ, could have been finally uplifted to its present height by the late Cretaceous Deccan volcanism." @default.
- W2187050462 created "2016-06-24" @default.
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- W2187050462 date "2015-01-01" @default.
- W2187050462 modified "2023-09-27" @default.
- W2187050462 title "Structure and evolution of Satpura Gondwana Basin over Central Indian Tectonic Zone: inferences from seismic and gravity data" @default.
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