Significance of transition between Talchir Formation and Karharbari Formation in Lower Gondwana basin evolution — A study in West Bokaro Coal basin, Jharkhand, India

Journal of Earth system science

Biplab Bhattacharya1¹  Abhijit Chakraborty2²  H N Bhattacharya1¹ 

[1] Department of Geology, Presidency College, Calcutta 700 073, India.$$;Department of Geology, Jogamaya Devi College, 92 S.P. Mukherjee Road, Calcutta 700 026, India.$$

关键词: Talchir Formation;    Gondwana Supergroup;    Glacio-marine sediments;    fluvio-lacustrine;    glacio-isostacy.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

Basal part of the Gondwana Supergroup represented by Talchir and Karharbari Formations (Permo-Carboniferous) records an abrupt change-over from glacio-marine to terrestrial fluviolacustrine depositional environment. The contact between the two is an unconformity. Facies analysis of the glacio-marine Talchir Formation reveals that basal glaciogenic and reworked glaciogenic sediments are buried under storm influenced inner and outer shelf sediments. Facies associations of the Karharbari Formation suggest deposition as fluvio-lacustrine deposits in fault-controlled troughs. An attempt has been made in this paper to explain the sedimentation pattern in Talchir and Karharbari basins, and the abrupt change-over from glacio-marine to terrestrial fluviolacustrine depositional environment in terms of glacio-isostacy.

【 授权许可】

Unknown