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Brine chemistry and the spectrum of stratifonn sediment-hosted Pb-Zn deposits

Citation

Cooke, DR and Large, RR and Bull, SW and McGoldrick, PJ, Brine chemistry and the spectrum of stratifonn sediment-hosted Pb-Zn deposits, Mineral Deposits: Processes to Processing, proceedings of the fifth biennial SGA Meeting and the tenth quadrennial IAGOD Symposium, 22-25 August 1999, London, pp. 829-832. ISBN 905809068X (1999) [Conference Extract]


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Abstract

Brine compositions in Australian stratiform sediment-hosted Pb-Zn deposits are controlled by the nature of the basin fill and/or the flow path of the mineralising fluid, McArthur-type Paleoproterozic Pb-Zn deposits of Northern Australian (HYC, Mount Isa, etc.) formed when oxidised (SO42-predominant) basinal brines interacted with a major reductant. In contrast, base metal mineralisation in Broken Hill-type deposits (Broken Hill, Cannington) precipitated when hot, reduced brines of enigmatic origin entered a cool, oxidised environment. Selwyn-type deposits form when reduced metalliferous brines are quenched in a reducing environment. McArthur- and Broken Hill-type deposits contain the bulk of Australia's zinc resources, whereas Selwyn-type deposits are poorly represented in the Australian geological record.

Item Details

Item Type:Conference Extract
Research Division:Earth Sciences
Research Group:Geochemistry
Research Field:Inorganic Geochemistry
Objective Division:Mineral Resources (excl. Energy Resources)
Objective Group:Mineral Exploration
Objective Field:Zinc Ore Exploration
Author:Cooke, DR (Professor David Cooke)
Author:Large, RR (Professor Ross Large)
Author:Bull, SW (Dr Stuart Bull)
Author:McGoldrick, PJ (Dr Peter McGoldrick)
ID Code:70711
Year Published:1999
Deposited By:Research Division
Deposited On:2011-07-01
Last Modified:2011-07-01
Downloads:0

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