Journal article
Collision-related granitic magmatism in the Granites-Tanami Orogen, Western Australia
L Bagas, FP Bierlein, JAC Anderson, R Maas
Precambrian Research | ELSEVIER | Published : 2010
Abstract
The Palaeoproterozoic Granites-Tanami Orogen (GTO) is a significant auriferous province located in the poorly exposed southwestern part of the North Australian Craton (NAC). U-Pb data from Sensitive High Mass Resolution Ion Microprobe (SHRIMP) studies, Sm-Nd isotopic data, geochemistry and petrological studies all suggest that granitic rocks in the Western Australian portion of the GTO were emplaced around ca. 1795 Ma broadly synchronous with gold mineralization. These are variably fractionated, peraluminous, and derived from, or interacted with, ca. 2600 Ma upper crustal material. Deformation, metamorphism and magmatism around 1795 Ma in the GTO were synchronous with the Stafford Orogeny in..
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Funding Acknowledgements
This contribution is a product of a collaborative research grant (MERIWA M389) supported by the Centre for Exploration Targeting at the University of Western Australia, the Minerals Exploration Research Institute of Western Australia, Tanami Gold NL., and the Geological Survey of Western Australia. The paper is published with permission of the Minerals and Energy Research Institute of Western Australia. Cindi Mispagel of the University of Western Australia is thanked for helping set up the SHRIMP during analyses of zircons at Curtin University of Technology in Perth, Western Australia. The manuscript benefited from constructive reviews and helpful comments by John Winchester, Calvin Miller and Randall Parrish, and we are very grateful for their contributions.