(a)
(b)
(c)
(d)
(e)
(f)
(g)
(h)
(i)
(j)
(k)
(l)
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.