.

Indicators Comments

A. Potential uranium traps: Graphite, redox boundaries

1. The locations and orientations of plate-like, single or multiple graphitic faultconductors,

complexity, bends, offsets, etc. associated with the unconformity.

From Fixed & Moving Loop surveys.

2. Graphitic lithologies, fold repeated or facies concentrations of graphite, and

positions with respect to EM conductors.

EM bright spots or Tau anomalies, inversions

of TDEM or DC Resistivity data.

3. Deep, conductive, clay-altered graphitic lithology in the basement associated

with basement-hosted uranium.

Smaller, off-conductor EM bright spots, like

zones O2 and O2 Next, Eagle Point mine.

B. Potential hydrothermal alteration: Fluid transport of uranium

4. Conductive features indicating de-silicification and argillization of the

sandstone and/or basement.

Indicators of hydrothermal fluid flow and

removal of silica.

5. Resistive features indicating silicification of the sandstone and/or basement. Indicators of fluid transport and dumping of

silica.

6. Combinations of 4 and 5, and position relative to plate-like conductors. e.g. silica cap with a breach.

7. Locations and orientations of weakly conductive second order or crosscutting

faults.

Sources of structural complexity and fluid

egress/ingress.

source:

Advances in Geophysical Exploration for Uranium Deposits

in the Athabasca Basin

Powell, B. [1], Wood, G. [1], Bzdel,