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Type: Artigo de periódico
Title: La-sf-icp-ms Zircon U-pb Geochronology Of Granitic Rocks From The Central Bundelkhand Greenstone Complex, Bundelkhand Craton, India
Abstract: The central Bundelkhand greenstone complex in Bundelkhand craton, northern India is one of the well exposed Archaean supracrustal amphibolite, banded iron formation (BIF) and felsic volcanic rocks (FV) and associated with grey and pink porphyritic granite, tonalite-trondhjemite-granodiorite (TTG). Here we present high precision zircon U-Pb geochronological data for the pinkish porphyritic granites and TTG. The zircons from the grey-pinkish porphyritic granite show three different concordia ages of 2531. ± 21. Ma, 2516. ± 38. Ma, and 2514. ± 13. Ma, which are interpreted as the best estimate of the magmatic crystallization age for the studied granites. We also report the concordia age of 2669. ± 7.4. Ma for a trondhjemite gneiss sample, which is so far the youngest U-Pb geochronological data for a TTG rock suite in the Bundelkhand craton. This TTG formation at 2669. Ma is also more similar to Precambrian basement TTG gneisses of the Aravalli Craton of north western India and suggests that crust formation in the Bundelkhand Craton occurred in a similar time-frame to that recorded from the Aravalli craton of the North-western India. © 2015 Elsevier Ltd.
Editor: Elsevier Ltd
Citation: Journal Of Asian Earth Sciences. Elsevier Ltd, v. 118, p. 125 - 137, 2016.
Rights: fechado
Identifier DOI: 10.1016/j.jseaes.2015.12.021
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

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