Minas Ragra
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The Minas Ragra was a large
vanadium Vanadium is a chemical element; it has Symbol (chemistry), symbol V and atomic number 23. It is a hard, silvery-grey, malleable transition metal. The elemental metal is rarely found in nature, but once isolated artificially, the formation of an ...
mine in the
Pasco Region Pasco () is a department and region in central Peru Peru, officially the Republic of Peru, is a country in western South America. It is bordered in the north by Ecuador and Colombia, in the east by Brazil, in the southeast by Bolivia, in ...
of
Peru Peru, officially the Republic of Peru, is a country in western South America. It is bordered in the north by Ecuador and Colombia, in the east by Brazil, in the southeast by Bolivia, in the south by Chile, and in the south and west by the Pac ...
. The deposit was discovered by a
United States Geological Survey The United States Geological Survey (USGS), founded as the Geological Survey, is an agency of the U.S. Department of the Interior whose work spans the disciplines of biology, geography, geology, and hydrology. The agency was founded on Mar ...
expedition on November 20. 1905. Members of this expeditions were Donnel Foster Hewett and
José J. Bravo José is a predominantly Spanish and Portuguese form of the given name Joseph. While spelled alike, this name is pronounced very differently in each of the two languages: Spanish ; Portuguese (or ). In French, the name ''José'', pronounced , ...
In this deposit the mineral
patrónite Patrónite is the vanadium sulfide mineral with chemical formula, formula Vanadium, Vsulfur, S4. The material is usually described as V4+(S22−)2. Structurally, it is a "linear-chain" compound with alternating bonding and nonbonding contacts b ...
was first discovered by a member of the expedition Antenor Rizo-Patron. A mine was established in very short time by the Vanadium Corporation of America. By 1914 75% of the world vanadium ore production was coming from the Minas Ragra in Peru, making the mine the world leading producer of vanadium. With the production of vanadium as side product of uranium mining from carnotite the mine had to close in 1955.


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References

Vanadium {{Mine-stub