  Minas Ragra | |
| Location | |
|---|---|
| Pasco Region | |
| Country | Peru |
| Production | |
| Products | Vanadium |
| History | |
| Opened | 1906 |
| Closed | 1955 |
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.[1] 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.[2] 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.[3] With the production of vanadium as side product of uranium mining from carnotite the mine had to close in 1955.
- ^ Hewett, Donnel Foster (1906). "A new occurrence of vanadium in Peru". Engineering and Mining Journal. 82 (9): 385.
- ^ Hillebrand, W. F. (1907). "The Vanadium Sulphide, Patronite, and ITS Mineral Associates from Minasragra, Peru". Journal of the American Chemical Society. 29 (7): 1019–1029. doi:10.1021/ja01961a006. ISSN 0002-7863.
- ^ Fischer, Siegfried (1914). "Uranium and Vanadium". Early Publications of the Lehigh Faculty (Paper 293).