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Uraninite crystals from Topsham, Maine (size: 2.7 × 2.4 × 1.4 cm) Uraninite is a major ore of uranium. Some of the highest-grade uranium ores in the world were found in the Shinkolobwe mine in the Democratic Republic of the Congo (the initial source for the Manhattan Project) and in the Athabasca Basin in northern Saskatchewan, Canada.
Uranium minerals are typically uraninite with lesser uranothorite, brannerite, and coffinite. The uranium is especially concentrated along thin carbonaceous seams or carbon leaders. Strong regional scale alteration consists of pyrophyllite, chloritoid, muscovite, chlorite, quartz, rutile, and pyrite. The main elements associated with the ...
[38] [39] Uranium occurs as the secondary minerals autunite and meta-autunite after uraninite and coffinite in fractured Cambrian metamorphosed shales and quartzite, at or near the contact with Jurassic porphyritic quartz monzonite. [40] [41] [42] The Apex-Lowboy deposit has an inferred resource of 615,000 metric tons at a grade of 0.07% U 3 O ...
The uranium mineral is most commonly uraninite, which occurs with pyrite, marcasite, and chalcopyrite. The orebodies are in veins or strataform deposits within one-half mile of diabase intrusions. [ 4 ]
It is found in many minerals including uraninite (the most common uranium ore), autunite, uranophane, torbernite, and coffinite. [7] There are significant concentrations of uranium in some substances, such as phosphate rock deposits, and minerals such as lignite, and monazite sands in uranium-rich ores. (It is recovered commercially from these ...
Uraninite, also known as pitchblende, is the most common ore mined to extract uranium. ... The find was the largest of its kind, with industry experts estimating the ...
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Uraninite, a reduced uranium ore mineral, accumulated within the permeable column of broken rock, forming a cylindrical and vertical (and stationary) rather than tabular and sub-horizontal (and migrating) uranium roll front deposit. Apparent mineralizing fluid flow direction was upward.