Journal article
Petrogenesis of coeval lamproites and kimberlites from the Wajrakarur field, Southern India: New insights from olivine compositions
S Sarkar, A Giuliani, S Ghosh, D Phillips
Lithos | Published : 2021
Abstract
Olivine is one of the most abundant phases in kimberlites and cratonic lamproites, where it occurs as mantle-derived xenocrysts and magmatic phenocrysts or rims overgrowing xenocrystic cores, indicating its prevalence throughout most of the crystallisation sequence of these magmas. Thus, olivine can provide valuable insights into kimberlite and lamproite petrogenesis. Here, we present a detailed study of olivine compositional zoning in two lamproites (P2 and P12) of the Mesoproterozoic Wajrakarur kimberlite-lamproite field in southern India and use these data to propose a genetic link between lamproites and kimberlites in the region. Olivine macrocrysts (i.e., anhedral grains >1 mm) from the..
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Awarded by Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Funding Acknowledgements
We would like to thank Graham Hutchinson for undertaking the EPMA analyses at the University of Melbourne. SS acknowledges MHRD, Govt. of India for supporting his Ph.D. fellowship. AG is supported by Swiss National Foundation (Ambizione fellowship no. PZ00P2_180126/1). SG thanks the SERB-DST (grant no. ERC/2015/000558) for financial support. We acknowledge contrusive and helpful reviews by Geoff Howarth and an anonymous referee, and the efficient editorial handling of Michael Roden.