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Osamu Utsumi mine, Campo do Cercado, Caldas, Poços de Caldas alkaline complex, Minas Gerais, Brazil

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Latitude & Longitude (WGS84): 21° 56' 48'' South , 46° 29' 57'' West
Latitude & Longitude (decimal): -21.94694,-46.49917
Name(s) in local language(s):Mina Osamu Utsumi, Campo do Cercado, Caldas, complexo alcalino de Poços de Caldas


Uranium mine, closed 1997, studied as natural analogue for nuclear waste disposal. Breccia pipe Uranium deposit.

Mineral List


43 valid minerals.

Rock Types Recorded

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Select Rock List Type

Alphabetical List Tree Diagram

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Paleoproterozoic
1600 - 2500 Ma
Paleoproterozoic intrusive and metamorphic terranes

Age: Proterozoic (1600 - 2500 Ma)

Comments: Mixtures of metamorphic and intrusive or plutonic rocks, tracts known as crystalline, migmatitic terranes, moderately to highly metamorphosed rocks of unknown origin with or without intrusions. This classification is inherently prone to variable interpretation, as other compilers might distinguish some packages by their metamorphic or gneissic protoliths, and the associated age ranges may be more variable.

Lithology: Intrusive and metamorphic terranes

Reference: Geological Survey of Canada. Generalized geological map of the world and linked databases. doi:10.4095/195142. Open File 2915d. [18]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License



This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Cathles, L.M. and Shea, M.E. (1992) Near-field high-temperature transport: evidence from the genesis of the Osamu Utsumi uranium mine, Poços de Caldas alkaline complex, Brazil. Journal of Geochemical Exploration, 45(1-3): 565-603.

Waber, N., Schorscher, H.D., and 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.

Breit, G.N. and Hall, S.M. (2011) Deposit model for volcanogenic uranium deposits. U.S. Geological Survey Open-File Report 2011–1255, 5 p.

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