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    New aspects of sulfur biogeochemistry during ore deposition from δ34S of elemental sulfur and organic sulfur from the Here's Your Chance Pb/Zn/Ag deposit

    200846_200846.pdf (976.3Kb)
    Access Status
    Open access
    Authors
    Holman, Alex
    Grice, Kliti
    Greenwood, Paul
    Böttcher, M.
    Walshe, J.
    Evans, Katy
    Date
    2014
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Holman, A. and Grice, K. and Greenwood, P. and Böttcher, M. and Walshe, J. and Evans, K. 2014. New aspects of sulfur biogeochemistry during ore deposition from δ34S of elemental sulfur and organic sulfur from the Here's Your Chance Pb/Zn/Ag deposit. Chemical Geology. 387: pp. 126-132.
    Source Title
    Chemical Geology
    DOI
    10.1016/j.chemgeo.2014.08.025
    ISSN
    0009-2541
    School
    Department of Applied Chemistry
    Remarks

    NOTICE: This is the author’s version of a work that was accepted for publication in Chemical Geology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Chemical Geology, Vol. 387, (2014). doi: 10.1016/j.chemgeo.2014.08.025

    URI
    http://hdl.handle.net/20.500.11937/43843
    Collection
    • Curtin Research Publications
    Abstract

    Sulfur isotope studies of base metal sulfide deposits have mostly focussed on sulfide minerals, but elemental sulfur and organic sulfur are also potentially significant components of the sulfur cycle during ore deposition. The δ34S of elemental sulfur and organic sulfur isolated from the Paleoproterozoic Here's Your Chance (HYC) Pb/Zn/Ag deposit (McArthur Basin, northern Australia) were measured to be between + 5 and + 8‰, approximately 6 to 7‰ heavier than the median values of first-generation HYC sulfides. Elemental sulfur and organic sulfur are thought to have been formed contemporaneously with the first generation of metal sulfides. The δ34S of organic sulfur showed an increasing trend along the path of the mineralising fluid, as sulfate was progressively 34S-enriched due to Rayleigh distillation. The δ34S data support a model in which bacterial sulfate reduction produced dissolved sulfide with δ34S of 0 to + 5‰. The subsequent oxidation of sulfide produced reactive sulfur species such as polysulfide ions, which were then incorporated into organic matter.

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