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Brazil | |
| Waber, N., Schorscher, H. D., & Peters, T. (1992). Hydrothermal and supergene uranium mineralization at the Osamu Utsumi mine, Poços de Caldas, Minas Gerais, Brazil. Journal of Geochemical Exploration, 45(1-3), 53-112. USGS Open File Report 81-1666 Paulo Neves' collection |
| Rui Nunes 2011 |
| [var. Pitchblende] USGS Open File Report 81-1666 |
Osamu Utsumi mine, Caldas, Minas Gerais, Brazil