Intraplate alkali basalts related to end-Cretaceous Deccan magmatism: implications for tectonomagmatic processes
Soumi Chattopadhaya,
Biswajit Ghosh,
Chuan-Zhou Liu
et al.
Abstract:This study aims to investigate the earliest imprint of Deccan rift magmatism as preserved in alkali basalts from the northwestern Indian shield. The alkali basalts are petrographically classified as nephelinites and basanites. They are silica undersaturated and their high Mg#, CaO/Al
2
O
3
, Cr and Ni indicate their primitive character. Geochemically, they are similar to global ocean island basalts; their bulk rock trace elements and Sr-Nd-Hf isotopic signatures … Show more
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