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Controls on sedimentation in Indian Palaeoproterozoic basins: clues from the Gwalior and Bijawar basins, central India

By
Partha Pratim Chakraborty
Partha Pratim Chakraborty
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Naresh Chandra Pant
Naresh Chandra Pant
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Pritam P. Paul
Pritam P. Paul
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Published:
January 01, 2015

Abstract

Overlying Archaean Bundelkhand Granite Gneiss Complex, the Gwalior and Bijawar Groups of rocks represent two Palaeoproterozoic basin successions which, despite their common sediment provenance and analogous rift-related tectonic setup, record more dissimilarity in their sedimentation pattern than similarity. Whereas early sedimentation in the Gwalior Basin is clastic, the early Bijawar sedimentation is dominantly chemogenic (limestone and chert) except for an early, restricted volcano-clastic record. Although both of the basins record syn-depositional volcanic/volcaniclastic event(s) in the form of occurrence of basaltic and basaltic–andesite sills encased within their respective basin fills, the occurrence of iron formation in the later part of Gwalior sedimentation history and its absence in the Bijawar succession is related to variable oxidation conditions in the water columns of the two basins. Rising sea-level and upwelling on the continental margins of these two rift-related basins possibly generated different water chemistries; these allowed the deposition of iron formation in the Gwalior Basin and phosphorite in the Bijawar Basin. Effects of post-depositional digenetic re-crystallization are noticed within both iron formation and phosphorite deposits present in the basin successions.

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Contents

Geological Society, London, Memoirs

Precambrian Basins of India: Stratigraphic and Tectonic Context

R. Mazumder
R. Mazumder
University of New South Wales, Australia
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P. G. Eriksson
P. G. Eriksson
University of Pretoria, South Africa
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Geological Society of London
Volume
43
ISBN electronic:
9781862397194
Publication date:
January 01, 2015

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