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

Photo: JRGL
 
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 talnakite replacing early assemblage. Tennantite and sphalerite replace cobaltite and safflorite.
3) Cu/Fe sulphides: Chalcopyrite, talnakite 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

Acanthite
Azurite
'Bitumen'
Bornite
Briartite
Calcite
Chalcocite
Chalcopyrite
Cobaltite
Copper
Covellite
Cuprite
Digenite
Djurleite
Dolomite
Erythrite
Gersdorffite
Gold
Malachite
Marcasite
Olivenite
Pyrite
var: Bravoite
Quartz
Renierite
Safflorite
Silver
Sphalerite
Tennantite
Tenorite


30 entries listed. 28 valid minerals.

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References

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.

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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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