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

Srivastava, Rajesh K. ; Ernst, Richard E. ; Söderlund, Ulf LU ; Samal, Amiya K. ; Pandey, Om Prakash LU and Gautam, Gulab C. (2022) In Geological Society Special Publication 518(1). p.173-196
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... (More)

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.

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author
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organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
Geological Society Special Publication
series title
Geological Society Special Publication
volume
518
issue
1
edition
1
pages
24 pages
publisher
Geological Society of London
external identifiers
  • scopus:85125139353
ISSN
0305-8719
ISBN
978-1-78620-552-0
DOI
10.1144/SP518-2021-53
language
English
LU publication?
yes
id
062d66ee-7ac6-4c73-a94b-84aa628b76b8
date added to LUP
2022-06-02 10:57:54
date last changed
2022-06-02 10:57:54
@inbook{062d66ee-7ac6-4c73-a94b-84aa628b76b8,
  abstract     = {{<p>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.</p>}},
  author       = {{Srivastava, Rajesh K. and Ernst, Richard E. and Söderlund, Ulf and Samal, Amiya K. and Pandey, Om Prakash and Gautam, Gulab C.}},
  booktitle    = {{Geological Society Special Publication}},
  isbn         = {{978-1-78620-552-0}},
  issn         = {{0305-8719}},
  language     = {{eng}},
  number       = {{1}},
  pages        = {{173--196}},
  publisher    = {{Geological Society of London}},
  series       = {{Geological Society Special Publication}},
  title        = {{Existence of the Dharwar–Bastar–Singhbhum (DHABASI) megacraton since 3.35 Ga : constraints from the Precambrian large igneous province record}},
  url          = {{http://dx.doi.org/10.1144/SP518-2021-53}},
  doi          = {{10.1144/SP518-2021-53}},
  volume       = {{518}},
  year         = {{2022}},
}