Apophyllite weathering and the aqueous geochemistry of a Karoo breccia pipe

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.

Grantor

Department of Geological Sciences

Year dc:date.issued

2002

Author dc:creator

• Cavé, Lisa Caryn

Advisors dc:contributor.advisor

• Fey, Martin
• Jackson, Graham
• Nordström, Kirk

• Geological Sciences

Handle dc:identifier.uri

http://hdl.handle.net/11427/40090

OAI identifier oai:identifier

oai:open.uct.ac.za:11427/40090