Fig. 11 | Scientific Reports

Fig. 11

From: Fertile high-K magmatism and hydrothermal alteration zone associated with porphyry copper mineralization in Samra area, SE Sinai, Egypt

Fig. 11

(a) a random distribution pyrite cube in pyrite-bearing rhyolite- ignimbrite sheets; (b) Pyrite disseminated in quartz veins and altered to limonite and/or hematite, Old Copper mined area; (c) Chalcopyrite occurs mainly either as subhedral to anhedral fine-grained crystals in the quartz vein; (d) Chalcopyrite altered along grain boundaries to and covellite, (e) Subhedral bornite crystals intergrown with chalcopyrite; (f) Botryoidal Malachite aggregates; (g) Massive azurite in volcanic and sedimentary rocks; (h) Covellite occurs replacement of chalcopyrite mineral, note relics of chalcopyrite can still be observed; (i) ) Chalcocite occurs as thin stringers or cracks falling, (j) Alteration map of Samra area showing hydrothermal alteration zoning pattern from inner serictic to outer propylitic zones.

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