We talked to North Americas leading In Situ Leach (ISL) uranium mining engineers, and had them explain exactly how ISL worked. Most of the significant ISL operations in the United States were designed and/or constructed by these engineers. They explained how ISL mining is really just reversing the process of Mother Nature.
Blossom is what underground uranium miners called the crystals forming on the tunnel walls. Because the ore was in contact with air inside an underground mine, and as ground water moved slowly against the mines walls, a visible crust of uranium crystals would precipitate, or blossom along those walls. Making the uranium soluble doesnt require a lot of oxygen and water because oxidization is a natural process. Adding more oxygen to the groundwater found in, and around, a uranium-mineralized orebody is the principle upon which present-day In Situ Leach (ISL) uranium mining is based.
Eons ago, the uranium was soluble and moved, on or below the surface, with the ground water. In roll front uranium deposits the uranium was transported into the area through the natural groundwater system and precipitated from solution due to some reducing environment,...
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