Origin and Evolution of the Ore-Forming Fluids in the Liyuan Gold Deposit, Central North China Craton: Constraints from Fluid Inclusions and H-O-C Isotopic Compositions

Figure 6

Photomicrographs showing typical fluid inclusions observed in the Liyuan gold deposit. (a) Liquid-rich C-type fluid inclusion in early stage quartz. (b) Vapour-rich C-type fluid inclusion in early stage quartz. (c, d) Liquid-rich C-type fluid inclusions in middle stage quartz. PC-type FIs in early stage (e) and middle stage (f) quartz. (g) W-type fluid inclusion in late stage quartz. (h) W-type fluid inclusion in late stage calcite. (i) Coexisting W-type and PC-type fluid inclusions in middle stage quartz. (j, k) Coexistence of the C-type and W-type fluid inclusions in middle stage quartz. (l) Secondary W-type fluid inclusions in a linear distribution in late stage quartz. : vapour CO₂; : liquid CO₂; : vapour H₂O; : liquid H₂O.

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