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Journal ArticleDOI

The Archaean nucleus of Singhbhum: the present state of knowledge

01 Jul 2001-Gondwana Research (Elsevier)-Vol. 4, Iss: 3, pp 307-318
TL;DR: The supracrustal rocks of the Older Metamorphic Group (OMG), consisting of metasediments and ortho-amphibolite, constitute the oldest unit in the Archaean nucleus of Singhbhum as discussed by the authors.
About: This article is published in Gondwana Research.The article was published on 2001-07-01. It has received 182 citations till now. The article focuses on the topics: Mafic & Metamorphic facies.
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Journal ArticleDOI
TL;DR: The formation of cratons and orogenic belts is critical to the modeling of supercontinental assemblies as mentioned in this paper, and it is known that continental blocks were assembled into one large landmass during at least three times in earth history.

390 citations

Journal ArticleDOI
TL;DR: In this paper, the authors proposed a subdivision of the Eastern Ghats Province into four crustal provinces with widely different geological evolutions, including the Rengali and Jeypore Provinces formed at the margin of the Bhandara Craton.
Abstract: Abstract Extending along the east coast of peninsular India, the Eastern Ghats expose a deep section through a composite orogenic belt that once formed part of the Proterozoic mobile belt system within East Antarctica and East India. The critical evaluation of the existing geological and isotopic data strongly suggests that this orogenic belt includes not only the granulite facies Eastern Ghats Belt but also the Nellore-Khammam Schist Belt and lower grade units at the southern margin of the Singhbhum Craton. The present authors propose its subdivision into four crustal provinces with widely different geological evolutions. The Rengali and Jeypore Provinces formed at the margin of the Bhandara Craton in the Late-Archaean. In the Krishna Province, volcanosedimentary rocks equivalent to the Cuddapah Supergroup accumulated, probably on the Dharwar Craton in the Palaeoproterozoic, and the major tectonometamorphic event took place between 1.67 and 1.55 Ga, subsequent to a short-lived igneous activity. The Eastern Ghats Province, which shows considerable similarities with the Rayner Province of East Antarctica, was strongly affected by pervasive deformation, high-grade metamorphism and crustal-derived magmatism between 1.1 and 0.9 Ga, which extensively modified the crustal structure of present eastern peninsular India. Neoproterozoic and Early Phanerozoic tectonothermal activities were largely restricted to pre-existing shear zones, but the present configuration of the composite orogenic belt may have been achieved only during the Pan-African Orogeny.

326 citations


Cites background or methods from "The Archaean nucleus of Singhbhum: ..."

  • ...Compared to the neighbouring Dharwar and Singhbhum Cratons, the Bhandara Craton (Figs 1 & The nucleus of the Singhbhum Craton (Figs 1 & 2a) comprises a gneissic basement, voluminous granites and a low-grade volcanosedimentary cover sequence (Naqvi & Rogers 1987; Mukhopadyay 2001)....

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  • ...The age of unconformable deposition of a predominantly clastic cover sequence (Singhbhum, Dhanjori and Kolhan Groups) and the emplacement of mafic dyke swarms is not constrained (Mukhopadyay 2001)....

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Journal ArticleDOI
TL;DR: This article reported a precise 3506.8±2.3-Ma U-Pb SHRIMP zircon age for dacitic lava in a well-preserved low-grade metamorphic and low-strained greenstone belt succession of the southern Iron Ore Group, Singhbhum craton, India.
Abstract: This article reports a precise 3506.8 ± 2.3-Ma U-Pb SHRIMP zircon age for dacitic lava in a well-preserved low-grade metamorphic and low-strained greenstone belt succession of the southern Iron Ore Group, Singhbhum craton, India. This age makes the succession the oldest-known greenstone belt succession in India and one of the oldest low-strain greenstone successions in the world after the 3.51-Ga Coonterunah Group of the Pilbara craton, Western Australia, and the moderately deformed 3.54-Ga Theespruit Formation of the Barberton Greenstone Belt, Kaapvaal craton, South Africa. The geochemical composition of the dacitic lava and related volcanic rocks suggests that they formed in a volcanic arc setting. The succession also contains a major ∼120-m-thick oxide facies banded iron formation that distinguishes it from the slightly older successions of the Pilbara and Kaapvaal cratons. This banded iron formation may well be one of the oldest and most well preserved, and together with associated volcanics,...

190 citations

Journal ArticleDOI
TL;DR: The chromitite seams of the Nuasahi and Sukinda massifs are part of layered ultramafic bodies which occur within Archaean low-grade metamorphic rocks of the Iron Ore Group (IOG) in the Singhbhum Craton of the Indian Shield.

159 citations

Journal ArticleDOI
TL;DR: In this article, a possible fit is proposed for the reconstruction of the EB and SIB, where the northern margin of EB is placed adjacent to the western margin of the SIB and the TNCO and WB representing the continuations of the CITZ and NIB.

141 citations


Cites background from "The Archaean nucleus of Singhbhum: ..."

  • ..., 1991, 1998) and the grey gneisses of the Older Metamorphic Tonalitic Gneisses (OMTG) in the Singhbhum Province of the SIB (Mukhopadhyay, 2001)....

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  • ...The early Archaean supracrustal rocks and grey gneisses in both blocks occur as numerous enclaves of varying sizes within middle to late Archaean granitoids (Wu et al., 1991; Mishra et al., 1999; Mukhopadhyay, 2001)....

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References
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Book
01 Jun 1981

491 citations

Journal ArticleDOI
TL;DR: In this article, an ion microprobe was used to measure 207 Pb / 206 Pb ages of single zircons from four key lithologies from the Singhbhum Craton of eastern India.

190 citations