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Carbonates from the Palaeoproterozoic Sleemanabad Formation, Mahakoshal Basin, Central India


Affiliations
1 Department of Geology, University of Delhi, Delhi 110 007, India
 

Facies and facies succession analysis from four sections in a ~12 m thick carbonate succession, hitherto undescribed, exposed over an east–west transect over 600 km from the topmost part of the Palaeoproterozoic Sleemanabad Formation, Mahakoshal Group, Central India reveals facies development in a proximal–distal relation. The facies types include microbialite and stromatolite, interbedded limestone–mudstone, intra-clastic conglomerate, pyrite bearing dark-coloured li-mestone and massive/normal-graded conglomerate and fine-grained sandstone. While microbialites and isolated stromatolites (rarely conjoined) with seafloor precipitate are interpreted as a product of proximal peritidal deposition, the dark-coloured pyrite bearing limestone represents the distal platform deposition below storm wave base.

Keywords

Carbonate Succession, Facies Types, Mass Flow, Proximal-Distal Relation.
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  • Carbonates from the Palaeoproterozoic Sleemanabad Formation, Mahakoshal Basin, Central India

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Authors

Aditi Sharma
Department of Geology, University of Delhi, Delhi 110 007, India
Partha Pratim Chakraborty
Department of Geology, University of Delhi, Delhi 110 007, India

Abstract


Facies and facies succession analysis from four sections in a ~12 m thick carbonate succession, hitherto undescribed, exposed over an east–west transect over 600 km from the topmost part of the Palaeoproterozoic Sleemanabad Formation, Mahakoshal Group, Central India reveals facies development in a proximal–distal relation. The facies types include microbialite and stromatolite, interbedded limestone–mudstone, intra-clastic conglomerate, pyrite bearing dark-coloured li-mestone and massive/normal-graded conglomerate and fine-grained sandstone. While microbialites and isolated stromatolites (rarely conjoined) with seafloor precipitate are interpreted as a product of proximal peritidal deposition, the dark-coloured pyrite bearing limestone represents the distal platform deposition below storm wave base.

Keywords


Carbonate Succession, Facies Types, Mass Flow, Proximal-Distal Relation.

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DOI: https://doi.org/10.18520/cs%2Fv121%2Fi3%2F414-421