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Electrical Resistivity Tomography and Induced Polarization for Alluvial Gold Placer Prospecting
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Engineering and Mining Geophysics 2020, Sep 2020, Volume 2020, p.1 - 8
Abstract
Alluvial gold deposits are associated with alluvium. We found that the channel facies of alluvium has an increased electrical resistivity as compared with the host rocks. This makes it possible to use the method of electrical resistivity tomography (ERT) for the prospecting for alluvial gold placers. The paper presents the results of geophysical studies by the method of ERT with measurement of induced polarization in the Baikal region. ERT was performed using a system of parallel profiles, 3-D inversion was performed, and resistivity and polarization maps were constructed. Perspective local dives in the bedrocks (pockets) are highlighted on the loose rocks thickness map. Linear anomalies of increased polarization associated with the alleged bedrock sources of gold have been discovered.