Minas Ragra

{{Short description|Vanadium mine in Pasco, Peru}}

{{Infobox mine

| name = Minas Ragra

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{{Location map+|Peru|width=300|caption=|places=

{{Location map~|Peru|lat=-10.89|long=-76.57|label={{nowrap|Minas Ragra}}|position=bottom}}

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| state/province = Pasco Region

| country = Peru

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| products = Vanadium

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| opening year = 1906

| closing year =1955

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The Minas Ragra was a large vanadium mine in the Pasco Region of Peru. The deposit was discovered by a United States Geological Survey expedition on November 20. 1905.{{cite journal | journal =Engineering and Mining Journal | title = A new occurrence of vanadium in Peru| year =1906 | volume = 82 | issue =9 | page = 385 | url = https://babel.hathitrust.org/cgi/pt?id=mdp.39015011434712;view=1up;seq=421| first = Donnel Foster | last = Hewett}} Members of this expeditions were Donnel Foster Hewett and José J. Bravo In this deposit the mineral patrónite was first discovered by a member of the expedition Antenor Rizo-Patron.{{cite journal|last1=Hillebrand|first1=W. F.|title=The Vanadium Sulphide, Patronite, and ITS Mineral Associates from Minasragra, Peru|journal=Journal of the American Chemical Society|volume=29|issue=7|year=1907|pages=1019–1029|issn=0002-7863|doi=10.1021/ja01961a006|url=https://zenodo.org/record/1450154}} 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.{{cite journal | last =Fischer| first = Siegfried| title =Uranium and Vanadium | year= 1914 | journal = Early Publications of the Lehigh Faculty | issue = Paper 293 | url = http://preserve.lehigh.edu/early-faculty-publications/293}} With the production of vanadium as side product of uranium mining from carnotite the mine had to close in 1955.