Abstract

Applied potential data from diamond-drill holes at Austinville, Virginia, have shown that the host rocks of the ore bodies are of extremely high resistivity and are strongly anisotropic. Triaxial anisotropy is prominent and is thought to be controlled by the mineralization. The delineation of ore bodies by diamond drilling after penetration by a discovery hole has been aided by three-dimensional applied potential surveys. Several field cases are described.

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