Uranium mineralization in the South Texas Uranium Belt occurs as sandstone-hosted roll front deposits. The deposits are strata-bound, elongate, and often, but not necessarily, occur in the classic “C” or truncated “C” roll configuration. They can be associated with an oxidation front or can be found in a re-reduced condition where an overprint of later reduction from hydrogen sulfide or other hydrocarbon reductant has seeped along faults and fractures. The uraniumbearing sandstone units can themselves be separated into several horizons by discontinuous mudstone units, and separate roll-fronts and sub-rolls can occur in the stacked sandstone sequences.

The generally accepted origin of uranium mineralization in the Goliad Formation is from leaching of intraformational tuffaceous material or erosion of older uranium-bearing strata. The leached uranium was carried by oxygenated ground water in a hexavalent state and deposited where a suitable reductant was encountered. The oxidation/reduction (redox) fronts are often continuous for miles, although minable grade uranium mineralization is not nearly as continuous. The discontinuous nature of uranium mineralization is often characterized as “beads on a string” and is due to sinuous vertical and lateral fluvial facies changes in the permeable sandstone host horizons, coupled with ground water movements and the presence or absence of reducing material.

All known Goliad formation deposits at Palangana are multipl ........

The company has one uranium mine located in the State of Texas, the Palangana Mine, which utilizes ISR mining and commenced extraction of uranium oxide (“U3O8”), or yellowcake, in November 2010.

The company utilize or plan on utilizing in situ recovery or ISR uranium mining for our South Texas projects including the Palangana Mine and will continue to utilize ISR mining whenever such alternative is available to conventional mining. When compared to conventional mining, ISR mining requires lower capital expenditures and has a reduced impact on the environment, as well as a shorter lead time to uranium recovery.

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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