
M Zone
Can Geophysics Work under High Voltage Power Lines?
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The M zone is a uranium occurrence on the Wheeler River Project in the Athabasca Basin of Northwestern Saskatchewan. The deposit is an Athabasca-type uranium deposit that lies at an unconformity, beneath 400 meter of Athabasca sandstone. The M-Zone deposit is thought to have formed as a result of oxidizing basin fluids meeting reducing fluids from a graphitic fault in the basement rock. |
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Although the deposit is below 400 metres of sediment, it is associated with a conductive graphite fault zone, and should be a good geophysical target. However; a nearby 3-phase power line limits conventional ground EM. |
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The DC resistivity technique has been favoured due to its ability to map structurally controlled alteration that accompanies unconformity uranium targets. Surveys were conducted using 3 arrays: A, Dipole-dipole B, Pole-dipole C, Pole-pole 2d inversions show that each array successfully detected the conductive graphitic fault zone. |