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    Rutile compositions in the Kalgoorlie Goldfields and their implications for exploration

    Access Status
    Fulltext not available
    Authors
    Scott, K.
    Radford, N.
    Hough, R.
    Reddy, Steven
    Date
    2011
    Type
    Journal Article
    
    Metadata
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    Citation
    Scott, K.M. and Radford, N.W. and Hough, R.M. and Reddy, S.M. 2011. Rutile compositions in the Kalgoorlie Goldfields and their implications for exploration. Australian Journal of Earth Sciences. 58 (7): pp. 803-812.
    Source Title
    Australian Journal of Earth Sciences
    DOI
    10.1080/08120099.2011.600334
    ISSN
    0812-0099
    School
    Department of Applied Geology
    URI
    http://hdl.handle.net/20.500.11937/23203
    Collection
    • Curtin Research Publications
    Abstract

    The compositions of 188 grains of rutile from 12 samples from the Kalgoorlie Goldfields, in the Yilgarn Craton of Western Australia, show that grains associated with the Mt Charlotte stockwork-style mineralisation have generally low minor-element contents (except for Fe, which may reflect, in part, ilmenite inclusions). However, rutile in the Fimiston (Golden Mile) lode-style mineralisation is (Fe + W)-rich, and in the high-grade Green Leader mineralisation rutile is (V + W)-rich. The incorporation of W6+ into the rutile structure in these styles of mineralisation is balanced by the presence of Fe3+ and V3+, although in rutile in the Green Leader mineralisation, V is present in both +3 and higher oxidation states. Detailed examination of W-rich rutiles from the Fimiston lode indicates that they have a complex internal microstructure, with variations in lattice orientation within single rutile crystals, probably caused by the strain associated with incorporation of large amounts of foreign ions into the rutile structure. The composition and complex microstructure of rutile can potentially discriminate between Au anomalies of higher and lower significance in the region (lode- vs stockwork-style), with the presence of V in high oxidation states suggesting that the hydrothermal fluids responsible were relatively oxidising.

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    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.