Browsing by Author "Cavé, Lisa Caryn"

Now showing 1 - 1 of 1
  • No Thumbnail Available
    Item
    Open Access
    Apophyllite weathering and the aqueous geochemistry of a Karoo breccia pipe
    (2002) Cavé, Lisa Caryn; Fey, Martin; Jackson, Graham; Nordström, Kirk
    Apophyllite is a phyllosilicate mineral commonly associated with hydrothermal environments. It is a major secondary phase occupying fractures in a dolerite breccia pipe on the farm Kopoasfontein, outside Calvinia in the western Karoo, South Africa. Groundwater abstracted from this breccia is uncharacteristically alkaline (pH 10) and high in fluoride (11 mg/L) for a natural water and the link between the groundwater chemistry and breccia pipe minerals has been investigated.