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Fig. 5

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Aspect des sulfures du minerai (microscope par réflexion, lumière polarisée non analysée) ; abréviations des noms de minéraux d’après Warr (2021). (a) Sphalérite (gris, Sp) dans bornite (brun, Bn) et chalcopyrite (jaune, Ccp) ; (b) Minerai sulfuré typique de Charrier avec bornite (brun, Bn), chalcopyrite (jaune, Ccp), covellite (bleue, Cv) et un cristal corrodé de cassitérite (gris, Cst) ; (c) Tennantite (Tnt) avec chalcopyrite (jaune, Ccp) et bornite (brun, Bn) et d’anciens cristaux de magnétite transformés en hématite (Hem) ; (d) Wittichénite (blanc, Wtc) dans bornite (brun, Bn), en voie de remplacement le long de ses clivages par la chalcopyrite (jaune, Ccp).

Aspect of ore sulphides (reflection microscope, unanalyzed polarized light); abbreviations of mineral names from Warr (2021). (a) Sphalerite (grey, Sp) in bornite (brown, Bn) and chalcopyrite (yellow, Ccp); (b) Typical Charrier sulphide ore with bornite (brown, Bn), chalcopyrite (yellow, Ccp), covellite (blue, Cv) and a corroded crystal of cassiterite (grey, Cst); (c) Tennantite (Tnt) with chalcopyrite (yellow, Ccp) and bornite (brown, Bn) and old crystals of magnetite transformed into hematite (Hem); (d) Wittichenite (white, Wtc) in bornite (brown, Bn), being replaced along its cleavages by chalcopyrite (yellow, Ccp).

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