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Teresita Mine (Aramo Mine; Texeu Mine), Riosa, Asturias, Spain

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Name(s) in local language(s):Mina Teresita (Mina del Aramo)

Epigenetic, carbonate-hosted Cu/Co/Ni deposit.

Host-rocks: Black fetid Namurian bituminous limestones (700 meters thick).
Complex mineralization with three successive primary stages and an important later supergene stage:

1) Pyrite-marcasite-bravoite: Co/Ni sulfarsenides and arsenides in dolomite; associated with acanthite. Cobaltite, safflorite, gersdorffite.

2) Intermediate stage: Tennantite and sphalerite in quartz/dolomite.
Renierite. Chalcopyrite (with briartite inclusions) and talnakhite replacing early assemblage. Tennantite and sphalerite replace cobaltite and safflorite.

3) Cu/Fe sulphides: Chalcopyrite, talnakhite, and bornite. Chalcocite, djurleite, digenite, covellite.

4) Oxidation sequence: Cementation copper sulfides, native elements, and oxidation minerals.

Production and reserves: 200,000 tons extracted.
400,000 tons ore reserves @ 1-3% Ni and 1-3% Co, 1-20% Cu.

Mineral List

28 valid minerals.

The above list contains all mineral locality references listed on 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 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.


Gomez Landeta, F. and Solans, J. (1981): Procesos supergénicos en la mina de cobre del Aramo (Asturias-España). Boletín Geológico y Minero: 92: 429-436.

Paniagua, A., Loredo, J. and Garcia Iglesias, J.(1988): Epithermal (Cu-Co-Ni) mineralization in the Aramo Mine (Cantabrian mountains, Spain): correlation between paragenetic and fluid inclusion data. Bulletin de Mineralogie: 111: 383-391.

Ambert, P., Balestro, F., Laroche, M., Figueroa, V. and Rovira, S. (2014) Technological aspects of the earliest metallurgy in France: ‘furnaces’ and slags from La Capitelle du Broum (Péret, France). Historical Metallurgy: 47(1): 60-74.

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