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Ulf Söderlund

Ulf Söderlund

Professor

Ulf Söderlund

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

Författare

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

Summary, in English

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.

Avdelning/ar

  • Berggrundsgeologi

Publiceringsår

2022

Språk

Engelska

Sidor

173-196

Publikation/Tidskrift/Serie

Geological Society Special Publication

Volym

518

Issue

1

Dokumenttyp

Del av eller Kapitel i bok

Förlag

Geological Society of London

Ämne

  • Geology

Aktiv

Published

ISBN/ISSN/Övrigt

  • ISSN: 0305-8719
  • ISBN: 978-1-78620-552-0