LA-SF-ICP-MS zircon U-Pb geochronology of granitic rocks from the central Bundelkhand greenstone complex, Bundelkhand craton, India

Autor(es)

Verma, Sanjeet K. ^[1] ; Verma, Surendra P. ^[2] ; Oliveira, Elson P. ^[1] ; Singh, Vinod K. ^[3] ; Moreno, Juan A. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Campinas UNICAMP, Inst Geosci, Dept Geol & Nat Resources, POB 6152, BR-13083970 Campinas, SP - Brazil

^[2] Univ Nacl Autonoma Mexico, Inst Energias Renovables, Privada Xochicalco S-N, Temixco 62580, Mor - Mexico

^[3] Bundelkhand Univ, Dept Geol, Jhansi, Uttar Pradesh - India

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF ASIAN EARTH SCIENCES; v. 118, p. 125-137, MAR 15 2016.
• Citações Web of Science: 18

Resumo

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. (C) 2015 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 12/15824-6 - Evolução de terrenos arqueanos do Cráton São Francisco e Província Borborema: implicações para processos geodinâmicos e paleoambientais globais
• Beneficiário: Elson Paiva de Oliveira
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 14/04920-0 - Investigações geológicas e geoquímicas em terrenos granito-gnaisses arqueanos do Cráton São Francisco
• Beneficiário: Juan Antonio Moreno Moreno
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 12/07243-3 - Novos diagramas de discriminação multi-dimensionais e modelagem geoquímica aplicados a rochas ígneas arqueanas de cratons brasileiros
• Beneficiário: Sanjeet Kumar Verma
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado