Existence of the Dharwar–Bastar–Singhbhum (DHABASI) megacraton since 3.35 Ga: constraints from the Precambrian large igneous province record

Rajesh K. Srivastava, Richard E. Ernst, Ulf Söderlund, Amiya K. Samal, Om Prakash Pandey, Gulab C. Gautam

Research output: Chapter in Book/Report/Conference proceedingChapter

10 Scopus citations

Abstract

We propose a Precambrian megacraton (consisting of two or more ancient cratons), DHABASI in the Indian Shield, which includes the Dharwar, Bastar and Singhbhum cratons. This interpretation is mainly based on seven large igneous provinces (LIPs) that are identified in these three cratons over the age range of c. 3.35–1.77 Ga, a period of at least 1.6 Ga. The absence of any subsequent break-up of DHABASI since 1.77 Ga suggests that this megacraton has existed for the past 3.35 Ga. In addition to their use in recognizing this megacraton, these LIP events may also provide likely targets for Cu–Ni–Cr–Co–platinum group element deposits. We suggest that the megacraton DHABASI was an integral part of supercontinents/supercratons through Earth’s history, and that it should be utilized as a distinct building block for palaeocontinental reconstructions rather than using the individual Dharwar, Bastar and Singhbhum cratons.
Original languageEnglish (US)
Title of host publicationGeological Society Special Publication
PublisherGeological Society of London
Pages173-196
Number of pages24
DOIs
StatePublished - Jan 1 2022
Externally publishedYes

ASJC Scopus subject areas

  • Water Science and Technology
  • Ocean Engineering
  • Geology

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