Fig. 2


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Textural and mineralogical characteristics of (a) the Panasqueira two-mica granite and (b) greisen in the drill hole SCB2. (c) Contact between the greisen cupola and the metasedimentary host rock. A mineralized quartz vein crosscut this contact. (d) Quartz-tourmaline veinlet characteristic of the QTS mineralization stage. (e) Typical quartz-white mica vein with wolframite mineralization. White-mica forms fringes along the schist-vein contacts. (e) Geodic vein displaying euhedral quartz and wolframite nugget infilling vugs between quartz crystals. Note that vugs were also infilled by sulfphides and carbonates during the late mineralization stages. Abbreviations from Whitney and Evans (2010): Apy: Arsenopyrite; Bt: Biotite; Ccp: Chalcopyrite; Kfs: K-feldspar; Wmca: White-mica; Pl: Plagioclase; Qz: Quartz; Wlf: Wolframite.

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