Source of salinity in the Broken Hill (Australia) Pb-Zn-Ag deposit: insights from halogen ratios in fluid inclusions

Slack, JF, Banks, DA orcid.org/0000-0001-9118-5298 and Wilkins, RWT (2017) Source of salinity in the Broken Hill (Australia) Pb-Zn-Ag deposit: insights from halogen ratios in fluid inclusions. In: Proceedings of the 14th Biennial SGA Meeting, vol 2. 14th Biennial SGA Meeting: Mineral Resources to Discover, 20-23 Aug 2017, Québec City, Canada. Society for Geology Applied to Mineral Deposits , pp. 637-640. ISBN 978-2-9816898-0-1

Abstract

Ratios of Na/Br, Br/Cl, and I/Cl were determined on leachates of fluid inclusions from the Broken Hill Pb-ZnAg deposit in Australia. Paragenetic relations suggest that whereas all analyzed inclusions formed during or after regional metamorphism, ion ratios are not greatly changed from those of the pre-metamorphic ore-forming fluids. Based on relatively high Br/Cl and I/Cl ratios, and low Na/Br ratios, we suggest that the high salinities that characterize Broken Hill fluid inclusions reflect a source dominated by evaporated seawater and not dissolved evaporites.

Metadata

Authors/Creators:	Slack, JF Banks, DA https://orcid.org/0000-0001-9118-5298 Wilkins, RWT
Dates:	Accepted: 1 June 2017 Published: 23 August 2017
Institution:	The University of Leeds
Academic Units:	The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Inst of Geophysics and Tectonics (IGT) (Leeds)
Depositing User:	Symplectic Publications
Date Deposited:	25 Oct 2018 08:28
Last Modified:	25 Oct 2018 11:23
Published Version:	https://e-sga.org/shop/product-details/?categories...
Status:	Published
Publisher:	Society for Geology Applied to Mineral Deposits

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Source of salinity in the Broken Hill (Australia) Pb-Zn-Ag deposit: insights from halogen ratios in fluid inclusions

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