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Archaean sedimentation on the Singhbhum Craton: depositional environments of conglomerates in Jharkhand (east India)

By
A. J. (Tom) Van Loon
A. J. (Tom) Van Loon
Emeritus, Geological Institute, Adam Mickiewicz University, Maków Polnych 16, 61-606 Poznan, Poland
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S. De
S. De
Geological Studies Unit, Indian Statistical Institute, 203 B.T. Road, Kolkata 700-108, IndiaDepartment of Geology, University of Calcutta, Kolkata 700019, India
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Published:
January 01, 2015

Abstract

Archaean to Palaeoproterozoic metasediments overlie the Archaean granitoid pluton of the Singhbhum Craton in east India. Relatively little is known about the Archaean metasediments, but they comprise several conglomerates in the state of Jharkhand. Their age is most probably Mesoarchaean, possibly earliest Neoarchaean. They occur at separate localities and their exposures commonly consist of scattered patches with a limited extent. Their interrelationships are consequently poorly known. Sedimentological analysis of their structure, architecture and clast composition suggests that most of them represent individual occurrences that partly have been largely eroded away. Other occurrences must have had a limited extent from the very beginning. The various conglomerates were deposited in different environments. Some represent braided or meandering fluvial environments, whereas others seem to have been deposited by mass flows with different degrees of viscosity, possibly mainly on alluvial fans.

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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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