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    Zirconolite and xenotime U-Pb age constraints on the emplacement of the Golden Mile Dolerite silland gold mineralization at the Mt Charlotte mine, Eastern Goldfields Province, Yilgarn Craton, Western Australia.

    Access Status
    Fulltext not available
    Authors
    Rasmussen, Birger
    Mueller, A.
    Fletcher, Ian
    Date
    2009
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Rasmussen, Birger and Mueller, Andreas and Fletcher, Ian. 2009. Zirconolite and xenotime U-Pb age constraints on the emplacement of the Golden Mile Dolerite sill and gold mineralization at the Mt Charlotte mine, Eastern Goldfields Province, Yilgarn Craton, Western Australia. Contributions to Mineralogy and Petrology. 157 (5): pp. 559-572.
    Source Title
    Contributions to Mineralogy and Petrology
    DOI
    10.1007/s00410-008-0352-7
    ISSN
    0010-7999
    Faculty
    Department of Applied Geology
    Faculty of Science and Engineering
    WA School of Mines
    Remarks

    The original publication is available at : http://www.springerlink.com

    URI
    http://hdl.handle.net/20.500.11937/22688
    Collection
    • Curtin Research Publications
    Abstract

    In situ SHRIMP U-Pb dating of magmatic zirconolite (CaZrTi2O7) in the Golden Mile Dolerite from the Mt Charlotte gold deposit (Yilgarn Craton, Australia) has yielded the first robust emplacement age (2,680 9 Ma) for the principle host-rock of gold mineralization in the Kalgoorlie district. In contrast, comagmatic zircon gave ages from approx 2.68 Ga to approx 2.17 Ga, reflecting isotopic resetting of high-U and -Th crystals. In situ SHRIMP analysis of hydrothermal xenotime (YPO4), which co-exists with gold in alteration pyrite, provided a Pb/Pb isochron age of 2,655 13 Ma. This date indicates that the youngest deposit in the Kalgoorlie district (Mt Charlotte) formed at approx 2.65 Ga, and provides a new minimum age for the structurally older Golden Mile deposit. Our results indicate that gold mineralization at Mt Charlotte is approx 50 million years older than indicated by recent 40Ar/39Ar dating and places new constraints on the timing of late-stage regional faulting (D4) in the province.

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