Gold Distribution in Relation to Depositional Processes in the Proterozoic Carbon Leader Placer, Witwatersrand, South Africa

  1. J. D. Collinson and
  2. J. Lewin
  1. M. Nami

Published Online: 29 APR 2009

DOI: 10.1002/9781444303773.ch44

Modern and Ancient Fluvial Systems

Modern and Ancient Fluvial Systems

How to Cite

Nami, M. (1983) Gold Distribution in Relation to Depositional Processes in the Proterozoic Carbon Leader Placer, Witwatersrand, South Africa, in Modern and Ancient Fluvial Systems (eds J. D. Collinson and J. Lewin), Blackwell Publishing Ltd., Oxford, UK. doi: 10.1002/9781444303773.ch44

Author Information

  1. Mining Technology Laboratory, Chamber of Mines of South Africa Research Organisation, P.O. Box 91230, Auckland Park 2006, South Africa

Publication History

  1. Published Online: 29 APR 2009
  2. Published Print: 7 FEB 1983

ISBN Information

Print ISBN: 9780632009978

Online ISBN: 9781444303773

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Keywords:

  • gold distribution in relation to depositional process in Proterozoic Carbon Leader placer – Witwatersrand, south Africa;
  • Carbon Leader Placer;
  • heavy mineral entrapment;
  • palaeoenvironmental analysis;
  • sedimentological investigation

Summary

A detailed study of 900 m2 of the Carbon Leader placer established the relationship between sedimentological features and the distribution pattern of gold.

The Carbon Leader placer at the site investigated displayed many features characteristic of a fluvial environment. Two different subfacies were recognized, one consisting of lenticular-shaped conglomerate/quartzite units considered to have been formed by active channelized flow and the other, a single sheet-like conglomerate, often with underlying thin carbonaceous seams and probably formed by sheet floods. The study of the gold distribution revealed that the stream channels, representing zones of high activity, yielded very erratic gold values while the adjacent plains had consistently high gold values.

The distribution pattern of gold as observed in the area studied is considered to be the result of contrasting hydrodynamic processes which prevailed within the two sub-environments.