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

Because the clay mineral content in the other areas is locally quite significant, it is designated as a distinct argillaceous zone on the alteration map, where oxidized pyrite (Fig. 12 f) and iron oxide-hydroxides are prevalent; copper minerals are scarce in this alteration zone.

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