Evolution of concepts on the origin of the Witwatersrand gold depositстатья
Информация о цитировании статьи получена из
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Статья опубликована в журнале из перечня ВАК
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 19 сентября 2015 г.
Аннотация:Models of the origin of the Witwatersrand gold deposit can be divided into two groups: placer and hydrothermal. Differences in their versions lie in interpretation of the degree of participation of sedimentary or hydrothermal processes and the source of gold. Analysis of the available data shows that the Witwatersrand deposit includes a complex (uranium-gold) mineralization of the polygenous and polychromous nature. Primary ore-bearing material of this deposit was obviously derived from the mantle and concentrated in greenstone belts of the Earth's crust. The material was subsequently extracted from weathering products of the greenstone belts, transported and concentrated by fluvial processes as detrital heavy mineral in reefs. At later stages, it was remobilized and redeposited in some places by hydrothermal processes. Recrystallization of gold postdated the formation of thucholite.