Genesis of the Longmendian Ag–Pb–Zn Deposit in Henan (Central China): Constraints from Fluid Inclusions and H–C–O–S–Pb Isotopes

Figure 4

Photographs and photomicrographs of the Longmendian ore: (a) Ag–Pb–Zn ore veins; (b) banded Ag–Pb–Zn ore veins; (c) banded Cu–Ag–Pb–Zn ore veins; (d) early native Ag–Gn–Sp vein crosscut by late Py–Ccp–Gn–Sp vein; (e) banded/brecciated Ag–Pb–Zn ores and banded pyrargyrite ores; (f) brecciated pyrargyrite ore veins; (g) disseminated native silver in Ag–Pb–Zn veins; (h) veined and disseminated native silver in Ag–Pb–Zn veins; (i) veined Ag–Pb–Zn ores in tuff; (j) Sp (replacing Py) is replaced by Ccp; (k) Td replaced Gn; (l) Gn replaced Sp; (m) Ag-bearing Td replaced Py; (n) Gn replaced Td; (o) Ag-bearing Td replaced Py. Py: pyrite; Gn: galena; Sp: sphalerite; Ccp: chalcopyrite; Td: tetrahedrite.

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