Fig. 12 | Scientific Reports

Fig. 12

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

Fig. 12

(a) Pink potassic and greenish color propylitic alteration zones; (b) Secondary biotite replaces hornblende, (c) Secondary muscovite (muscovitization) is widespread alteration replaces both K-feldspars and Plagioclase, (d) Secondary quartz made up of fine-grained anhedral interlocking grains, develops few millimetres nests and veinlets, (e) Grayishwhite argillic alteration, (f) Clay minerals and associated with oxidized pyrite in argillic alteration, (g) Epidote replaces plagioclase in propylitic alteration zone, (h) Chlorite place ferromagnesian minerals particularly hornblende and biotite, (i) Chlorite formed due to replacement of biotite mica in chlorite alteration zone. Py; Pyrite, Chl; Chlorite; Bio; Biotite, Ep; Epidote.

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