Geochronological and genetic characterization of basaltic basement from western offshore basins in India

Abstract

⁴⁰Ar-³⁹Ar geochronology, geochemistry, and Sr-Nd isotopic compositions of 30 core samples from 24 offshore drill wells in the Western offshore basins have been used to characterize the genetics of the volcanic basement from the Kutch, Mumbai, and Kerala-Konkan offshore basins. Findings from the volcanic basement rocks demonstrate extremely varied isotopic and geochemical fingerprints, which are suggestive of significantly diverse parent magma compositions and emplacement processes.

Keywords

⁴⁰Ar-³⁹Ar geochronology / Western offshore basins / Kutch offshore basin / Mumbai offshore basin / Kerala-Konkan offshore basin

CRediT authorship contribution statement

Piyush Gupta: Conceptualization, Formal analysis, Investigation, Writing – original draft, Writing – review & editing. Shakti Singh Rathore: Conceptualization, Data curation, Methodology, Supervision. Sandeep Singh: Conceptualization, Methodology, Project administration, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing.

Declaration of competing interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Acknowledgments

The authors thank the Director (Exploration), ONGC, Dehradun, for their kind permission to publish this paper. The views expressed in this paper are those of the authors and not necessarily that of the organization they represent. This work forms part of Piyush’s Ph.D. work. The authors are also thankful to IIT Roorkee for providing all administrative and other facilities for carrying out this work. Comments from five anonymous reviewers improved the initial manuscript.

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