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El Criollo Mine, Cerro Blanco pegmatite district, Tanti, Punilla Department, Córdoba, Argentina

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Latitude & Longitude (WGS84): 31° 21' 28'' South , 64° 39' 9'' West
Latitude & Longitude (decimal): -31.35778,-64.65250
Köppen climate type:Cwb : Subtropical highland climate or temperate oceanic climate with dry winters


Granite pegmatite quarry about 10 km from the town of Tanti. The blue cobaltoan genthelvite from here, now widely distributed in collections, is not from the pegmatite body itself, but from a younger vein of friable specular hematite that cuts across the pegmatite body.

Main Mineralization:
Triplite (coppery brown color):
Mines El Criollo and El Gaucho, Cerro Blanco, Tanti Department. Punilla, Cordoba: The core zone, large masses or bochones of up to 5 m in diameter. The meteoric action alters it to strengite, phosphosiderite, bermanite, libethenite, dufrenite, eosphorite, and rockbridgeite.

Eosphorite (reddish-brown color):
El Criollo Mine, Cerro Blanco, Tanti Department Punilla Córdoba. With bermanite, phosphosiderite and manganese oxides as products of alteration of triplite.

Bermanite (microcrystals, brown caramel color):
In pegmatites of the Cerro Blanco, Tanti, Punilla Department, Córdoba. In thin crusts between the products of alteration of the triplite present in this locality's pegmatites. It is associated with phosphosiderite, eosphorite, and pachnolite. Also deposited directly on manganese oxides or covered partially by them.

Strengite (microcrystals, rose-purple color):
El Criollo Mine, Cerro Blanco, Department Punilla, Cordoba. Occurs in drusen material altered pegmatitic bodies, accompanied by apatite, sulphides and quartz; also in thin crusts covering cracks in triplite; less frequent as aggregates of radial-fibrous spherulites.

Phosphosiderite (microcrystals, violet color):
El Criollo Mine, Cerro Blanco, Department Punilla, Cordoba. Frequently as druses with beautiful crystals of 1 mm, well developed, very varied habits.

Torbernite, Metatorbernite:
Cerro Blanco, Tanti, Punilla Department, Cordoba. The pegmatite carries primary and secondary uranium minerals.

Mineral List


65 valid minerals. 1 (TL) - type locality of valid minerals.

Rock Types Recorded

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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

Neoproterozoic
541 - 1000 Ma



ID: 1376946
Neoproterozoic intrusive and metamorphic terranes

Age: Neoproterozoic (541 - 1000 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

Gay, H.D. (1968) Fosfatos en la pegmatita del cerro Blanco, Tanti, provincia de Córdoba. Revista de la Asociación Geológica Argentina: 23: 279-286.

Hurlbut, S.C. and Aristarain, L.F. (1968) Bermanite and its occurrence in Córdoba, Argentina. American Mineralogist: 53: 416-431.

Schalamuk, I.B. (1969) Contribución al conocimiento de los fosfatos de las pegmatitas de cerro Blanco, Tanti, provincia de Córdoba. Revista de la Asociación Geológica Argentina: 25: 121-137.

Toubes, R.O., Chaar, E., and Spikermann, J.P. (1973) Minerales radioactivos de la República Argentina. 5° Congreso Geológico Argentino: 1: 249-260.

American Mineralogist (1978) 53: 416-431.

Gay, H.D. and Franchini, M.B. (1984) Cristales de triplita en pegmatitas de las sierras de Córdoba. Revista de la Asociación Argentina de Mineralogía, Petrología y Sedimentología: 15 (1-2): 46-48.

Dina, H. (1993) Hentschelita en Cerro Blanco, Tanti, Córdoba. Informacion Tecnologica: 48(3-4): 277-282.

Demartin, F., Pilati, T., Gay, H.D., and Gramaccioli, C.M. (1993) The crystal structure of a mineral related to paulkerrite. Zeits. Kristallogr.: 208: 57–71.

Demartin, F., Gay, H.D., Gramaccioli, C.M., and Pilati, T. (1997) Benyacarite, a new titanium-bearing phosphate mineral species from Cerro Blanco, Argentina. Canadian Mineralogist: 35: 707–712.

Anthony, J.W., Bideaux, R.A., Bladh, K.W., and Nichols, M.C. (2000) Handbook of Mineralogy, Volume IV. Arsenates, Phosphates, Vanadates. Mineral Data Publishing, Tucson, AZ, 680pp.

Mas, G., Peral, H., and Bengochea, L. (2002) Triplita de Cerro Blanco, Córdoba, Argentina: triplita o zwieselita? 6° Congreso de Mineralogía y Metalogenia: 263-266.

Černý, P., Galliski, M.A., Oyarzábal, J.C., Teertstra, D.K., Chapman, R., MacBride, L., and Ferreira, K. (2003) Stranded and equilibrated assemblages of late feldspars in two granitic pegmatites in the Pampean Ranges, Argentina. The Canadian Mineralogist: 41(4): 1013-1026.

Mr. Nelson Valenzuela.

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