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

Mina de Miguel Vacas ou dos Vieiros

Copper deposit.
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 1600 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.

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)




Mineral List

Ankerite
Azurite
Brochantite
Cacoxenite
Calcite
Chalcanthite
Chalcopyrite
Chalcosiderite
Chrysocolla
Copiapite
Cuprite
Goethite
Graphite
Libethenite
Limonite
Malachite
Planerite
Pseudomalachite
Pyrite
Quartz
Reichenbachite
Schwartzembergite
Strengite
var: Aluminian Strengite
Turquoise
var: Rashleighite
Wavellite
Zapatalite


28 entries listed. 25 valid minerals.

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