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Miguel Vacas Mine, Pardais, Vila Viçosa, Évora District, Portugal

Photo: Rui Nunes 2007

Mina de Miguel Vacas, (*) Pardais, Vila Viçosa, Distrito de Évora, Portugal

Cu mine
A former producing open pit, that extracted and treated oxide copper. The deposit was exploited from 1925 to 1986 by various companies.

Vein-like to lenticular chalcopyrite, native copper and malachite in brecciated quartz veins. Known for excellent libethenite and other secondary copper phosphates.

Tipos: ocorrências de cobre, independentes da actividade ígnea, disseminadas.
Ocorrências de cobre: independentes da actividade ígnea, filões.
Descrição: filões quartzosos brechificados, sub-concordantes com a estrutura regional, que ocupam uma extensão de 1.600 m com rumo NNW, pendor de 70ºE e 0,80 m de possança média; mineralização pós-hercínica. Os xistos encaixantes tectonizados apresentam por vezes importantes impregnações de minerais de cobre.
Mineralizações principais: calcopirite, cobre nativo, malaquite.
Morfologias: filão, lenticular.
Rochas encaixantes: liditos, xistos.
Geologia Local: Silúrico, flanco NE do grande anticlinal de Sousel-Estremoz-Alandroal.
Geologia Regional: Silúrico.
in Siorminp

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(*) Esta mina é referida em muitos documentos como sita no Monte dos Vieiros, Pardais.

Mindat Articles

Portuguese Ossa-Morena Zone Mining by Martins da Pedra

Mineral List

29 entries listed. 25 valid minerals.

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References

- Braithwaite, R. S. W. and Ryback, G. (1994): Reichenbachite from Cornwall and Portugal. Mineral. Mag., 58, 449-454.
- Rewitzer, C. & Marques de Sá, J.P. (1998): Die Miguel Vacas Mine: Eine Kupferlagerstätte im Süden Portugals. Lapis 23(5), 13-23. (in German)
- M. M. Abreu, M. J. Matias, M. Clara F. Magalhães, M. J. Basto: Impacts on water, soil and plants from the abandoned Miguel Vacas copper mine, Portugal; Journal of Geochemical Exploration, Elsevier, February–March 2008.

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