The petrography of the auriferous conglomerates of the Witwatersrand: with notes on some associated rocks, and a discussion of the origin of the gold

Abstract

Though since their discovery in 1885 the auriferous conglomerates or banket of the Witwatersrand have redeived a great deal of attention from geologists, no attempt had been made to subject these rocks to a dew tailed petrographical study till a few years ago, when the present writer undertook the task. The results of much of this work have already been published in the Transactions of the Geological Society of South Africa.The description that follows, while based upon these publications, contains a considerable mount of additional information.The banket may be briefly described as a siliceous quartz conglomerate i.e. e, conglomerate whose pebbles and matrix are mainly composed of quartz.