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https://hdl.handle.net/2440/71489
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Type: | Journal article |
Title: | G'day Gondwana - the final accretion of a supercontinent: U-Pb ages from the post-orogenic Sao Vicente Granite, northern Paraguay Belt, Brazil |
Author: | McGee, B. Collins, A. Trindade, R. |
Citation: | Gondwana Research, 2012; 21(2-3 Sp Iss):316-322 |
Publisher: | Int Assoc Gondwana Research |
Issue Date: | 2012 |
ISSN: | 1342-937X |
Statement of Responsibility: | Ben McGee, Alan S. Collins and Ricardo I.F. Trindade |
Abstract: | The Paraguay Belt in central South America is part of a larger chain of orogenic belts, including the Araguaia Belt to the northeast and potentially the Pampean Belt to the south, which are believed to mark the suture zone of the Clymene Ocean - interpreted amongst the youngest of the Gondwana amalgamation orogens. The post-orogenic São Vicente Granite crops out in the northern Paraguay Belt and cuts the basal unit of the deformed and metamorphosed Cuiabá Group. The age of this granite therefore provides a long sort after minimum age for orogenesis within the belt. Dating crystallisation of this important intrusion is challenging due to the presence of considerable common-Pb. However, based on LA-ICPMS dating of more than 100 zircons from three separate samples we interpret a robust crystallisation age for the São Vicente batholith at 518 ± 4. Ma. This age constrains the termination of deformation within the Paraguay Belt and the final accretion of the supercontinent Gondwana. © 2011 International Association for Gondwana Research. |
Keywords: | Gondwana assembly São Vicente LA-ICPMS Zircon Paraguay Belt |
Rights: | © 2011 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved. |
DOI: | 10.1016/j.gr.2011.04.011 |
Published version: | http://dx.doi.org/10.1016/j.gr.2011.04.011 |
Appears in Collections: | Aurora harvest Earth and Environmental Sciences publications |
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