О коренных источниках палеороссыпей Витватерсранда (Южная Африка)

Abstract

The article discusses Witwatersrand paleoplacers as well as current high-mercury gold placers and sources of their formation in the Unya-Bom district of the Amur province. The Witwatersrand deposits contain fine gold with significant mercury content. The original sources are unknown there. In the Unya-Bom district, during the destruction of ore bodies and the transition of high-grade mercuric gold into placers, its composition is preserved, with the exception of the high-grade shell formed in placers: silver and mercury are removed from it due to electrochemical corrosion. When transported in placers up to 25 km, the high content of mercury in the central part of gold particles corresponds to ore gold. An attempt was made to typify one of the possible sources of clastogenic gold in Witwatersrand paleoplacers. It might have been gold-quartz mineralization with high- mercury gold, similar to that common in the Unya-Bom district of the Amur region.