India-Antarctica-Australia-Laurentia connection in the Paleoproterozoic-Mesoproterozoic revisited: Evidence from new zircon U-Pb and monazite chemical age data from the Eastern Ghats Belt, India

Abstract

Research Article| September 01, 2011 India-Antarctica-Australia-Laurentia connection in the Paleoproterozoic–Mesoproterozoic revisited: Evidence from new zircon U-Pb and monazite chemical age data from the Eastern Ghats Belt, India Sankar Bose; Sankar Bose † 1Department of Geology, Presidency University, Kolkata 700 073, India †E-mail: sankar.bose@gmail.com Search for other works by this author on: GSW Google Scholar Daniel J. Dunkley; Daniel J. Dunkley 2National Institute of Polar Research, Tachikawa, Tokyo-to 190 8518, Japan Search for other works by this author on: GSW Google Scholar Somnath Dasgupta; Somnath Dasgupta 3Indian Institute of Science Education and Research, Kolkata 700 106, India Search for other works by this author on: GSW Google Scholar Kaushik Das; Kaushik Das 4Department of Geology, Bengal Engineering and Science University, Howrah 711103, India Search for other works by this author on: GSW Google Scholar Makoto Arima Makoto Arima 5Graduate School Environment and Information Science, Yokohama National University, Yokohama 2408501, Japan Search for other works by this author on: GSW Google Scholar Author and Article Information Sankar Bose † 1Department of Geology, Presidency University, Kolkata 700 073, India Daniel J. Dunkley 2National Institute of Polar Research, Tachikawa, Tokyo-to 190 8518, Japan Somnath Dasgupta 3Indian Institute of Science Education and Research, Kolkata 700 106, India Kaushik Das 4Department of Geology, Bengal Engineering and Science University, Howrah 711103, India Makoto Arima 5Graduate School Environment and Information Science, Yokohama National University, Yokohama 2408501, Japan †E-mail: sankar.bose@gmail.com Publisher: Geological Society of America Received: 17 May 2010 Revision Received: 13 Oct 2010 Accepted: 13 Nov 2010 First Online: 08 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 © 2011 Geological Society of America GSA Bulletin (2011) 123 (9-10): 2031–2049. https://doi.org/10.1130/B30336.1 Article history Received: 17 May 2010 Revision Received: 13 Oct 2010 Accepted: 13 Nov 2010 First Online: 08 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Sankar Bose, Daniel J. Dunkley, Somnath Dasgupta, Kaushik Das, Makoto Arima; India-Antarctica-Australia-Laurentia connection in the Paleoproterozoic–Mesoproterozoic revisited: Evidence from new zircon U-Pb and monazite chemical age data from the Eastern Ghats Belt, India. GSA Bulletin 2011;; 123 (9-10): 2031–2049. doi: https://doi.org/10.1130/B30336.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract We present zircon and monazite U-Pb data from ultrahigh-temperature (UHT) metamorphosed orthogneisses and paragneisses collected from key areas of the Eastern Ghats Belt, India. The results show contrasting tectonothermal histories in different isotopic domains of the Eastern Ghats Belt that were identified by previous workers. Of particular importance is the discovery of a ca. 1760 Ma event (concordia age) in the southern domain 1A, which is interpreted to be the age of an early UHT metamorphism event. This was followed by a second granulite-facies metamorphism event and partial melting at ca. 1600 Ma. This domain was presumably cratonized with India at around 1600 Ma. The record of the ca. 1760–1600 Ma events in domain 1A of the Eastern Ghats Belt allows us to speculate on modeling the Paleoproterozoic–Mesoproterozoic transcontinental correlation. The accretionary orogenic processes in the supercontinent Columbia encompassed Australia, Antarctica, Laurentia, and parts of India.The central part of Eastern Ghats Belt (isotopic domain 2), on the other hand, contains zircons showing inherited ages of ca. 1880–1700 Ma, with a concordant age group of ca. 1760 Ma. Moderately to strongly discordant ages in the time span of ca. 1600–1100 Ma in domain 2 are interpreted to be mixing ages as a result of strong overprint of a ca. 1030–900 Ma tectonothermal event(s) that affected this domain. An early UHT metamorphism event in this domain is inferred to have occurred at ca. 1030–990 Ma (chemical dating of included monazite grains). Zircon records the most pervasive tectonothermal event in this domain at ca. 980–900 Ma, which is correlative with the Rayner orogeny in East Antarctica as a part of the formation of Rodinia. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.