AngloGold has used 3-D seismic reflection surveys as a powerful mine planning tool at several gold mines in the Archaean Witwatersrand Basin (Figure 1). The detailed 3-D seismic data prevent misplacement of underground development arising from otherwise poorly constrained geologic models. They also identify zones of potential mining hazard such as the distribution of unstable lithologies and fault zones. At nearly 300 km2, the Western Ultra Deep Levels (WUDL) survey is the largest mineral 3-D survey acquired in southern Africa to date. It imaged much of the Carletonville Goldfield, 80 km southwest of Johannesburg (Figure...

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