Journal article
Olivine-phyric basalt in the Mesoproterozoic Gawler silicic large igneous province, South Australia: Examples at the Olympic Dam Iron Oxide Cu–U–Au–Ag deposit and other localities
Q Huang, VS Kamenetsky, K Ehrig, J McPhie, M Kamenetsky, K Cross, S Meffre, A Agangi, I Chambefort, NG Direen, R Maas, O Apukhtina
Precambrian Research | ELSEVIER | Published : 2016
Abstract
The felsic-dominant Gawler Range Volcanics and cogenetic Hiltaba Suite granitoids constitute the ca. 1590 Ma Gawler silicic large igneous province in the Gawler Craton, South Australia. The province includes minor occurrences of olivine-phyric basalt at Kokatha and Mount Gunson. In this study, we describe additional olivine-phyric basalts and dykes intersected by drill holes at the Olympic Dam Iron Oxide Cu–U–Au–Ag deposit and the Wirrda Well Cu–Au prospect. Laser Ablation Inductively Coupled Plasma Mass Spectrometry U–Pb dating results (un-anchored) of apatite in the basalts and dykes at Mount Gunson (1576 ± 33 Ma), Wirrda Well (1596 ± 17 Ma), and Olympic Dam (1621 ± 20 Ma) confirm their ef..
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Funding Acknowledgements
This research was supported by BHP Billiton and the Australian Research Council (ARC Linkage Grant "The supergiant Olympic Dam U-Cu-Au-REE ore deposit: towards a new genetic model"). We thank Teena Rusak and Stacey McAvaney (DMITRE) for introduction to the SARIG Database. We also thank Karsten Goemann and Sandrin Feig (CSL, University of Tasmania) for helping with microprobe analyses, and Jay Thompson (CODES, University of Tasmania) for help with apatite dating. We thank Hugh Rollinson for his comments on an early version of the manuscript. Two anonymous reviewers and Editor Guochun Zhao, provided very helpful comments that improved the manuscript.