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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.
Uraninite, also known as pitchblende Autunite, a secondary uranium mineral named after Autun in France Torbernite, an important secondary uranium mineral. The primary uranium ore mineral is uraninite (UO 2) (previously known as pitchblende). A range of other uranium minerals can be found in various deposits.
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.
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 ...
Autunite was named after the town of Autun, France, where the mineral was initially found. The mineral was named by Henry J. Brooke and William H. Miller in 1854. [5] The archaic name "calco-uranite" pairs with the similarly composed mineral, torbernite, which was named "cupro-uranite".
[12] [22] Uranium is found in hundreds of minerals, including uraninite (the most common uranium ore), carnotite, autunite, uranophane, torbernite, and coffinite. [12] Significant concentrations of uranium occur in some substances such as phosphate rock deposits, and minerals such as lignite , and monazite sands in uranium-rich ores [ 12 ] (it ...
Uraninite and uranothorite are the principal ore minerals at Faraday and Madawaska. Other radioactive minerals found at this locality include allanite, cyrtolite (a uranium-thorium rich variety of zircon), [25] uranophane-α and uranophane-β. The uranium-to-thorium ratio is about 2-to-1.
Uraninite in pegmatite rock, from Ontario. The ban on private prospecting was lifted in 1947. [11] [13] This led to an exploration boom that quickly resulted in the discovery of mines in the Northwest Territories , Ontario (Bancroft and Elliot Lake), and Saskatchewan (Uranium City). By 1956, thousands of radioactive occurrences had been noted ...