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

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(Mina de Miguel Vacas ou dos Vieiros)

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.


Refs.:
- 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)
- http://www.strahlen.org/vp/pt/vacas/




Group 1 - Elements
  		• Graphite1.CB.05a
    C
    Group 2 - Sulphides and Sulfosalts
  		• Chalcopyrite2.CB.10a
    CuFeS
     
    2
    Group 4 - Oxides and Hydroxides
  		• Cuprite4.AA.10
    Cu
     
    2
    		O
  		• Goethite4.FD.10
    α-Fe
    3+
     
    		O(OH)
  		• Quartz4.DA.05
    SiO
     
    2
  		• Schwartzembergite4.KB.10
    Pb
    2+
    5
    		I
    3+
     
    		O
     
    6
    		H
     
    2
    		Cl
     
    3
    Group 5 - Nitrates and Carbonates
  		• Ankerite5.AB.10
    Ca(Fe
    2+
     
    		 ,Mg,Mn
    2+
     
    		)(CO
     
    3
    		)
     
    2
  		• Azurite5.BA.05
    Cu
     
    3
    		[OH|CO
     
    3
    		]
     
    2
  		• Calcite5.AB.05
    CaCO
     
    3
  		• Malachite5.BA.10
    Cu
     
    2
    		[(OH)
     
    2
    		|CO
     
    3
    		]
    Group 7 - Sulphates, Chromates, Molybdates and Tungstates
  		• Brochantite7.BB.25
    Cu
     
    4
    		[(OH)
     
    6
    		|SO
     
    4
    		]
  		• Chalcanthite7.CB.20
    CuSO
     
    4
    		·5H
     
    2
    		O
  		• Copiapite7.DB.35
    Fe
    2+
     
    		Fe
    3+
    4
    		[OH|(SO
     
    4
    		)
     
    3
    		]
     
    2
    		 · 20H
     
    2
    		O
    Group 8 - Phosphates, Arsenates and Vanadates
  		• Cacoxenite8.DC.40
    Fe
    3+
    24
    		Al[(OH)
     
    12
    		|O
     
    6
    		|(PO
     
    4
    		)
     
    17
    		] · 17H
     
    2
    		O
  		• Chalcosiderite8.DD.15
    Cu(Fe
    3+
     
    		,Al)
     
    6
    		[(OH)
     
    4
    		|(PO
     
    4
    		)
     
    2
    		]
     
    2
    		 · 4H
     
    2
    		O
  		• Libethenite8.BB.30
    Cu
     
    2
    		[OH|PO
     
    4
    		]
  		• Planerite8.DD.15
    Al
     
    6
    		[(OH)
     
    4
    		|HPO
     
    4
    		|PO
     
    4
    		]
     
    2
    		 · 4 H
     
    2
    		O
  		• Pseudomalachite8.BD.05
    Cu
     
    5
    		[(OH)
     
    2
    		|PO
     
    4
    		]
     
    2
  		• Reichenbachite8.BD.05
    Cu
     
    5
    		[(OH)
     
    2
    		|PO
     
    4
    		]
     
    2
  		• Strengite8.CD.10
    FePO
     
    4
    		·2H
     
    2
    		O
  		• Turquoise8.DD.15
    Cu(Al,Fe
    3+
     
    		)
     
    6
    		[(OH)
     
    4
    		|(PO
     
    4
    		)
     
    2
    		]
     
    2
    		 · 4H
     
    2
    		O
      var: Rashleighite8.DD.15
    Cu(Al,Fe)
     
    6
    		(PO
     
    4
    		)
     
    4
    		(OH)
     
    8
    		·5H
     
    2
    		O
  		• Wavellite8.DC.50
    Al
     
    3
    		[(OH,F)
     
    3
    		|(PO
     
    4
    		)
     
    2
    		] · 5H
     
    2
    		O
  		• Zapatalite8.DE.20
    Cu
     
    3
    		Al
     
    4
    		[(OH)
     
    3
    		|PO
     
    4
    		]
     
    3
    		 · 4H
     
    2
    		O
    Group 9 - Silicates
  		• Chrysocolla9.ED.20
    (Cu,Al)
     
    2
    		H
     
    2
    		Si
     
    2
    		O
     
    5
    		(OH)
     
    4
    		·nH
     
    2
    		O


    25 entries listed. 25 valid minerals.

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