Uranium ores generally come from granitic sources, where radioactive minerals such as monazites are leached from the granites, carried by acidic solutions, then deposited where the fluids meet neutralizing conditions such as are found in carbon-bearing sediments and, in some cases, along unconformity surfaces. Other uranium ores are found directly in the granitic host rock, such as Australia's Olympic Dam deposit, containing nearly 35 percent of the world's known sources of economically recoverable uranium.

See also Archean; black smoker chimneys; flysch; geochemistry; granite, granite batholith; greenstone belts; hydrocarbons and fossil fuels; igneous rocks; metasomatic; mineral, mineralogy; ophiolites; petroleum geology; plate tectonics; Precambrian; soils.

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