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Uranium Mining Article

Igneous or hydrothermal
Hydrothermal uranium deposits encompass the vein-type uranium ores. Vein-type hydrothermal uranium deposits represent epigenetic concentrations of uranium minerals that typically fill breccias, fractures, and shear zones. . Many studies have sought to identify the source of uranium with hydrothermal vein-type deposits and the potential sources still remains a mystery, but are thought to include preexisting rocks that have been broken down by weathering and force that come from areas of long-term sediment build up. . The South Chine Block is an example of a region that has been relying on vein-type hydrothermal uranium deposit demand for the past half century. . Igneous deposits include nepheline syenite intrusives at Ilimaussaq, Greenland; the disseminated uranium deposit at Rossing, Namibia; uranium-bearing pegmatites, and the Aurora crater lake deposit of the McDermitt Caldera in Oregon. Disseminated deposits are also found in the states of Washington and Alaska in the US.

Breccia
Breccia uranium deposits are found in rocks that have been broken due to tectonic fracturing, or weathering. Breccia uranium deposits are most common in India, Australia and the United States. . A large mass of breccia is called a breccia pipe or chimney and is composed of the rock forming an irregular and almost cylinder like shape. . The origin of breccia pipe is uncertain but it is thought that they form on intersections and faults. When the formations are found solid in ground host rock called rock flour, it usually is often a site for copper or uranium mining. . Copper Creek, Arizona is home to approximately 500 mineralized breccia pipes and Cripple Creek, Colorado also is a site that contains breccia pipe ore deposits that is associated with a volcanic pipe.