Geology, Fluid Inclusion, and H–O–S–Pb Isotope Constraints on the Mineralization of the Xiejiagou Gold Deposit in the Jiaodong Peninsula

Figure 3

Photographs showing the alteration assemblage and ore minerals of the Xiejiagou gold deposit. (a) Potassic feldspathization and sericitization; (b) silicification, sericitization, and pyritization; (c) silicification and sericitization; (d) silicification with rare carbonate alteration; (e) pyritization; (f) silicification, sericitization, and chloritization; (g) euhedral cube pyrite in the early stage; (h) middle-stage pyrite occurs as subhedral aggregates; (i) middle-stage subhedral galena coexists with sphalerite and chalcopyrite; (j) middle-stage subhedral chalcopyrite coexists with pyrrhotite; (k) native gold occurs as inclusions in pyrite crystals; (l) electrum occurs as inclusion in sphalerite crystals. Kfs: K-feldspar; Ser: sericite; Chl: chlorite; Py: pyrite; Sp: sphalerite; Gn: galena; Ccp: chalcopyrite; Po: pyrrhotite; Au: native gold; El: electrum; Si: silicification; Carb: carbonate alteration.

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