Abstract Mesoproterozoic Chandarpur Group of Chhattisgarh basin describes and interprets sedimentation history of ~450 m thick conglomerate-sandstone-shale proximal assemblage as coastal-shoreface-mid shelf (fan-delta and prograding shelf) deposits, bounded by two major sequence boundaries of 1st–4th ordered cycles controlled by eustatic-tectonic events. Two major fining upward-coarsening upward – shallowing upward-deepening upward cycles explain stratigraphic architecture of the basin during deposition of Chandarpur Group. Geological mapping with sedimentological study including facies analysis have been attempted to characterize depositional environment, construct sequence stratigraphic architecture, and decipher evolutionary history of the basin. Intra- and inter-correlation of the basin highlight palaeogeographical changes during basin evolution, with other Purana basins in Indian Peninsula, in global orogenic context, enlightening associated supercontinental cycle. Chhattisgarh basin originated approximately ~1.4 Ga as an intracratonic rift basin and evolved into a passive-margin basin during Mesoproterozoic, recording rifting and subsidence stages throughout deposition of Chandarpur Group. With gradual stabilization, the basin expanded into an epicontinental sea; opening towards north-northwest and with northeast-southwest palaeoshoreline. Basin initiation during rifting is represented by Lohardih wacke-arkose-sublitharenite in fan-delta environment. Subarkoses from Lohardih-Chaporadih-Kansapathar Formations in prograding shelf environment suggest craton interior and passive-marginal tectonic setting, indicating gradual stabilization. Mature quartzarenites from Kansapathar sandstones reflect basin stability towards the stratigraphic top. Research highlights <UnorderedList Mark="Bullet"> <ItemContent> Sedimentation history and stratigraphic architecture of Chandarpur Group studied. </ItemContent> <ItemContent> Intracratonic rift basin evolved into passive margin basin. </ItemContent> <ItemContent> Chhattisgarh basin evolution probably connected to Columbia-Rodinia supercontinent cycle. </ItemContent> </UnorderedList> Graphical abstract

Depositional architecture and tectonic evolution of the Mesoproterozoic Chandarpur Group, Chhattisgarh basin, India

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发表日期：

2026年7月3日

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Sayani Khan,
Sarbani Patranabis-Deb,
Amlan Banerjee

摘要

Abstract

Mesoproterozoic Chandarpur Group of Chhattisgarh basin describes and interprets sedimentation history of ~450 m thick conglomerate-sandstone-shale proximal assemblage as coastal-shoreface-mid shelf (fan-delta and prograding shelf) deposits, bounded by two major sequence boundaries of 1st–4th ordered cycles controlled by eustatic-tectonic events. Two major fining upward-coarsening upward – shallowing upward-deepening upward cycles explain stratigraphic architecture of the basin during deposition of Chandarpur Group. Geological mapping with sedimentological study including facies analysis have been attempted to characterize depositional environment, construct sequence stratigraphic architecture, and decipher evolutionary history of the basin. Intra- and inter-correlation of the basin highlight palaeogeographical changes during basin evolution, with other Purana basins in Indian Peninsula, in global orogenic context, enlightening associated supercontinental cycle. Chhattisgarh basin originated approximately ~1.4 Ga as an intracratonic rift basin and evolved into a passive-margin basin during Mesoproterozoic, recording rifting and subsidence stages throughout deposition of Chandarpur Group. With gradual stabilization, the basin expanded into an epicontinental sea; opening towards north-northwest and with northeast-southwest palaeoshoreline. Basin initiation during rifting is represented by Lohardih wacke-arkose-sublitharenite in fan-delta environment. Subarkoses from Lohardih-Chaporadih-Kansapathar Formations in prograding shelf environment suggest craton interior and passive-marginal tectonic setting, indicating gradual stabilization. Mature quartzarenites from Kansapathar sandstones reflect basin stability towards the stratigraphic top.

Research highlights

Sedimentation history and stratigraphic architecture of Chandarpur Group studied.

Intracratonic rift basin evolved into passive margin basin.

Chhattisgarh basin evolution probably connected to Columbia-Rodinia supercontinent cycle.

Graphical abstract