Coal correlation and intrabasinal differential subsidence — A case study from the Barakar Formation of Talchir Gondwana Basin, Orissa

Abstract

In case of autocyclic sedimentation, direct relationship exists between net thickness of strata and number of coal cycles. Many of the coal basins including coal bearing Gondwana basins of India are good examples of autocyclic sedimentation, in which the cyclicity is attributed to intrabasinal differential subsidence of the basin floor. In the present work an attempt has been made to quantify the intrabasinal subsidence in a part of the Barakar Formation of the Talchir Gondwana basin. Eight undisturbed intervals were delineated in the Barakar stratigraphy. During different phases of sedimentation, different parts of the study area subsided with varying magnitudes. The areas of maximum subsidence accommodated thicker sediment column in comparison to the areas of slow subsidence rate.

Cyclic Sedimentation in the Barakar Formation of the Karanpura Field, Marginal Gondwana Basin, India

“…The study area, Karanpura, is a major economic coal bearing unit of Damodar valley basin, part of Gondwana sedimentation in peninsular India. Several researchers (Casshyap and Kumar, 1987;Gupta, 1999;Singh and Singh, 1996;Singh et al, 2003;Hota, 2010;Mukhopadhyay et al, 2010;Bhattacharya et al, 2012;Mendhe et al, 2016;Tewari et al, 2017; have worked on the sedimentary structures and facies characterization in local scales from various parts of Karanpura area and adjacent sub-basins belonging to Gondwana sedimentation (Raniganj basin, Durgapur depression etc. ).…”