Nature and Evolution of the Ore-Forming Fluids from Nanmushu Carbonate-Hosted Zn-Pb Deposit in the Mayuan District, Shaanxi Province, Southwest China

Figure 6

Photomicrographs of typical FIs hosted in different minerals of the Nanmushu Zn-Pb deposit, under transmitted light, crossed-nicols. (a) A brown grain sphalerite contains abundant FIs, including one relatively large type I FI. (b) In an automorphic quartz grain, there are abundant type I and type II FIs, which contain detectable bitumen. (c) One type I FI with liquid + vapor phase in calcite. (d) One two-phase CH₄-rich inclusion in quartz is dominated by water with detectable methane. (e) CH₄-rich inclusions with dark bubbles are dominated by detectable methane, coexisting with type I FIs in barite. Brt, barite; Cal, calcite; Dol, dolomite; Qz, quartz; Sp, sphalerite.