Fluid Inclusions and H-O-C-S-Pb Isotope Studies of the Xinmin Cu-Au-Ag Polymetallic Deposit in the Qinzhou-Hangzhou Metallogenic Belt, South China: Constraints on Fluid Origin and Evolution

Figure 4

Photographs of hand specimens and photomicrographs showing mineral assemblages of the Xinmin deposit. (a) Bismuthinite, pyrite, sphalerite, and chalcopyrite filling in the metapelite. (b) Pyrite, sphalerite, chalcopyrite, and galena disseminated in the breccia. (c) Tourmaline, pyrite, sphalerite, chalcopyrite, and galena occurring as vein in skarn. (d) The chalcopyrite was replaced by bismuthinite. (e) The optical heterogeneity of marcasite, late stage. (f) Chalcopyrite as emulsion droplet within sphalerite, making an exsolution texture. (g) Octahedrite and anhedral pyrite (PyII). (h) Euhedral pyrite (PyI) in the skarn. (i) Simultaneous pyrrhotite, sphalerite, and galena. (j) Euhedral fine grain-size tourmaline and quartz. (k) Quartz, calcite, and dolomite vein in the skarn. (l) Short columnar tourmaline, anhedral quartz, and fabric tremolite in the skarn. Mineral abbreviations (after [19]): Bm: bismuthinite; Ccp: chalcopyrite; Cal: calcite; Dol: dolomite; Gn: galena; Mrc: marcasite; Oc: Octahedrite; Po: pyrrhotite; Py: pyrite; Sp: sphalerite; Tr: tremolite; Tur: tourmaline.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

(i)

(j)

(k)

(l)