Mineralization within the Goliad Formation typically occurs within fluvial sands and silts as roll front deposits that are typically a “C” or cutoff “C” shape. The roll fronts are generally associated with an extended oxidation-reduction boundary or front. However, at the Goliad Project the mineralization is mostly tabular in nature and the typical “C” shape is frequently lacking. Additionally, the mineralized sediments are generally in unoxidized sediments.

At the Goliad Project there are four (A-D) stacked mineralized sand horizons that are separated vertically by zones of finer sand, silt, and clay. Deposition and concentration of uranium in the Goliad Formation likely resulted due to a combination of leaching of uranium from volcanic tuff or ash deposits within the Goliad or erosion of uraniumbearing materials from older Oakville deposits. The leaching process occurred near the outcrop area where recharge of oxidizing groundwater increased the solubility of uranium minerals in the interstices and coating sand grains in the sediments. Subsequent downgradient migration of the soluble uranium within the oxygenated groundwater continued until the geochemica conditions became reducing and uranium minerals were deposited in tabular bodies due to varying stratigraphic or structural conditions.

The Goliad Project uranium-bearing units occur as tabular deposits in vertically stacked sands and sandstones. Groundwater flowing from northwest to southeast in th ........

ISR mining involves circulating oxidized water through an underground uranium deposit, dissolving the uranium and then pumping the uranium-rich solution to the surface for processing. Oxidizing solution enters the formation through a series of injection wells and is drawn to a series of communicating extraction wells. To create a localized hydrologic cone of depression in each wellfield, more groundwater will be produced than injected. Under this gradient, the natural groundwater movement from the surrounding area is toward the wellfield, providing control of the injection fluid. Over-extraction is adjusted as necessary to maintain a cone of depression which ensures that the injection fluid does not move outside the permitted area.

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