Abstract
The endogenic nature of the Witwatersrand deposit and the combination of three ore formations in it, viz., two sulfide-quartz (of normal and high alkalinity) and one hydrocarbon (tucholite), are substantiated. To explain the concentration of uranium and gold in alkali-metal quartz melts, a new hypothesis on the formation of ore-silicon complexes K3[AuSiO5] etc. is suggested. A rhythmic explosive ore formation in the Archean depression of the Kaapvaal craton is considered.
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