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

Figure 7

Photomicrographs of hydrocarbon-bearing inclusions at room temperature (20°C). ((a), (b)) Liquid-rich oil-bearing inclusion comprises oil and gas. The oil forms a yellow fluorescing. (c) (d) Vapor-rich oil-bearing inclusion contains oil and gas. The oil forms a thin cream fluorescing rim around the hydrocarbon gas bubble. ((e), (f)) A set of oil-bearing inclusions exhibit continuous different filling degrees (in yellow dotted line area) with yellow fluoresces, coexisting with two-phase type I FIs and one-phase CH₄-rich inclusions (in blue dash dotted line area). Note: ((a), (c), (e)) under transmitted light, crossed-nicols; ((b), (d), (f)) under UV-epifluorescence.

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