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PESD_GSU_20200716_1213_(completed): Archean greenstone belts in India –
tectonics and sedimentation

PESD_GSU_20200716_1213_(completed)
1. Title of the Project:

Archean greenstone belts in India – tectonics and sedimentation
2. Name of Proposing Scientists:
Dilip Saha
3. Brief objectives and justification:

Greenstone belts consisting mainly of extrusive and intrusive magmatic complexes and small
proportion of metasedimentary successions are important elements in constraining models of
early evolution of Earth and Precambrian crustal growth. The world-wide greenstone belts
have recently been compared with ophiolites, and using geochemical proxies the majority
1
2,3
interpreted as of back-arc setting , though contrary views exist (e.g. Glikson and Lambert,
1976; Johnson et al., 2014). Together with surrounding tonalitic/trondhjemitic gneisses and
granites, greenstone belts in India constitute the bulk of Archean cratonic blocks of Dharwar,
Bastar and Singhbhum. We reexamine some of these belts with emphasis on magamtism,
sedimentation and styles of deformation, to validate applicability of plate tectonic paradigm
in the Paleoarchean to Neoarchean interval.

1 Furnes, H., Dilek, Y., de Wit, M., 2013. Precambrian greenstone sequences represent
different ophiolite types, Gondwana Research, http://dx.doi.org/10.1016/j.gr.2013.06.004.

2 Glickson, A. Y., Lambert, I.B., 1976. Vertical zonation and petrogenesis of the early
Precambrian crust in western Australia. Tectonophysics, 30, 55-89.

3 Johnson, T.E., Brown, M., Kaus, B.J.P., Van Tongeren, J.A. 2014. Delamination and
recycling of Archaean crust caused by gravitational instabilities. Nature Geoscience 7, 47–
52.
4. Name of Others Scientists Associated with their affiliation:
4.1. From the Institute:
S. Patranabis-Deb, GSU Amlan Banerjee, GSU Priyanka Bachhar, SRF, GSU

4.2. From other Institutions:
Prof. A. C. Collins, University of Adelaide, Australia Prof. N. J. Beukes, University of
Johannesburg, South Africa Dr. G. K. Deb, Presidency University, Kolkata
5. Date of Commencement:
01/04/2016

6. Date of Completion:
31/03/2020
7. Completion report(max 500 words) including complete list of publications and
patents based on the work from the project:

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