Abstract
The principal regional features and types of hydrothermal gold mineralisation in the intracontinental branch of the Pan-African Damara Orogen are discussed. Gold deposition occurred during the extensional and compressional-collision phases of the orogenic evolution. Minor gold mineralisation is present in the massive sulhide deposits of the Matchless Amphibolite Belt, emplaced during the extensional phase. The compressional-collision phase was characterised by deformation, metamorphism and granitic igneous activtty. Gold deposits that formed during this stage include gold associated with thrust zones; turbidite-hosted gold; and marble and calc-silicate-hosted gold. The latter is a type of gold mineralisation previously undocumented in the literature. The genesis of these gold deposits is related to episodes of hydrothermal fluid generation during tectonism, metamorphism and magmatic activity.
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