Journal article
Evidence for Ordovician subduction-related magmatism in the Truong Son terrane, SE Laos: Implications for Gondwana evolution and porphyry Cu exploration potential in SE Asia
CJ Gardner, IT Graham, E Belousova, GW Booth, A Greig
Gondwana Research | ELSEVIER | Published : 2017
Abstract
The Truong Son Fold Belt (TSFB) is characterised by Late Carboniferous-Late Triassic metamorphic, volcanic and plutonic rocks, the product of accretion of the Indochina Terrane onto the South China Terrane and a range of composite subduction, collision and extensional events. This study discusses geochronological and geochemical data obtained from a dioritic intrusion and rhyolitic tuff mapped in the Donken area of SE Laos, and previously assigned to the Permian Antoum Granodiorite rock suite within the TSFB. Magmatic zircon U-Pb Q-ICP-MS dating undertaken in this study suggests ages of ca 470 ± 2 Ma for the diorite and ca 476 ± 1.5 Ma for a proximal rhyolitic tuff. Whole-rock geochemistry o..
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Funding Acknowledgements
This project would have not been possible without the financial and logistical support of PT (Sole) Company Ltd., with its exploration crews and support staff, namely Fraser Gardiner, providing invaluable in-field assistance. Special thanks are made to William Powell and the team at the ARC CCFS and National Key Centre for Geochemical Evolution and Metallogeny of Continents (GEMOC) at Macquarie University, Australia for their outstanding support. The analytical data were obtained using instrumentation funded by DEST Systemic Infrastructure Grants, ARC LIEF, NCRIS/AuScope, industry partners and Macquarie University. This is contribution 858 from the ARC Centre of Excellence for Core to Crust Fluid Systems (http://www.ccfs.mq.edu.au) and 1116 in the GEMOC Key Centre (http://www.gemoc.mq.edu.au). The authors would also like to acknowledge the XRF Facility within the MarkbWainwright Analytical Centre at the University of New South Wales, and the Q-ICP-MS unit in the School of Earth Sciences, University of Melbourne, Australia for their analytical support. And finally, we would also like to thank Ian Metcalfe and Mei-Feng Shi for their helpful reviews which improved the final revised manuscript.