3. Electronic Theses and Dissertations (ETDs) - All submissions

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    The nature of hydrothermal fluids associated with granite-hosted, polymetallic mineralisation in the Eastern lobe of the bushveld complex
    (1998) Freeman, Lauren Anne
    Numerous small base-metal deposits occur in the acidic rocks of the Bushveld Complex, and modern exploration programs are currently re-examining this metallotect in an attempt to refine the current working hypothesis for mineralisation in these granites. The hypothesis proposed for the origin of mineralisation is multifaceted, encompassing both spatial and temporal relationships between at least three episodes of ore formation. The first episode of mineralisation (typified by the Zaaiplaats tin deposit) occurred at relatively high temperatures (>600'C to 4000' C), and resulted in the formation of orthomagmatic cassiterite, scheelite and an early generation of fluorite. At lower temperatures (200°C
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