Fig. 7


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Backscattered electron images of mineral assemblages for paragenetic stages I to VI of the Puy-les-Vignes deposit. (A) Subeuhedral Fe–W–rutile (Rt-1) intergrown with tourmaline on a greisenized granitic clast (stage I; sample PLV-02-04a). (B) Wolframite partially altered to ferberite-1 and scheelite showing patchy texture at microscopic scale (stage II; sample PLV-7597a). (C) Arsenopyrite-1 (stage II) cut by arsenopyrite-2 veinlets and hosting numerous tiny inclusions of native bismuth (stage V; sample PLV-7597a). (D) Cassiterite intergrown with arsenopyrite (stage II) crosscut by chalcopyrite veinlets (stage III; sample PV-2a). (E) Subeuhedral Fe–W–rutile (Rt-1) overgrown by Nb–Ta-rich rutile (Rt-2) disseminated in a quartz-wolframite vein (stage II; sample PLV-7574a). Fe–W-rutile shows a homogeneous core (dark grey) with W-rich sectors (light grey) having growth zoning. (F) Fe–Nb-rich rutile (Rt-3) within ferberite-1 showing growth banding (stage II; sample PLV-02-17). (G) Ta–Nb-rich ferberite-1 in a dissolution microvug within wolframite showing Ta–Nb-rich growth bands at the micrometer scale (stage II; sample PV-3). (H) Wolframoixiolite in a quartz-filled veinlet crosscutting wolframite (stage II; sample PV-5a).

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