Abstract
This paper records the occurrence and significance of a rare sill of tholeiitic basalt composition emplaced into the Mesoarchaean Ghattihosahalli Schist belt in western Dharwar Craton. The sill is represented by schistose amphibolite which is cofolded and deformed along with it’s host metasediments signifying that the sill participated in an event of tectonic stabilization of a microcontinent prior to the initiation of deposition of the Dharwar Supergroup.
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Acknowledgements
This paper is dedicated to late B.P. Radhakrishna who constantly encouraged the authors to carry out research on the petrogenisis of komatiites and associated rocks and in the evolution of the earth. We are grateful to E.V.S.K.Babu, Senior Principal Scientist, and D. Srinivasa Sarma Scientist, NGRI, Hyderabad for providing analysis of Major, Trace and REE and petrographic studies of the rock under study and we also thankful to Dr. Fareeduddin Former Director G.S.I for studying and providing petrographic description of the amphibolite sill rock and also thankful to Dr. Mahesh, Lecturer, New Horizon College of Engineering Bengaluru and Dr. Mohamed Shareef Senior Geologist, Geological Survey of India, Bengaluru for their help in preparation of Geochemical diagrams and plotting of Chondrite-normalized REE pattern. Authors also thank R.H. Sawkar, Geological Society of India for getting rock samples analysed at NGRI, Hyderabad. The authors thank the referee whose critical review of the paper helped in significantly improving the manuscript.
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Srinivasaiah, C., Vasudev, V.N. A Rare Occurrence of Deformed Tholeiitic Basalt Sill (Amphibolite) from Mesoarchaean Ghattihosahalli belt, Western Dharwar Craton, Karnataka. J Geol Soc India 93, 594–596 (2019). https://doi.org/10.1007/s12594-019-1221-x
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DOI: https://doi.org/10.1007/s12594-019-1221-x