Fluid inclusion characteristics and geological significance of the Dajinshan W–Sn polymetallic deposit in Yunfu, Guangdong Province

摘要: Abstract The Dajinshan tungsten–tin polymetallic deposit is a quartz-vein-type ore located in Western Guangdong Province. bodies show fairly simple shape and mainly occur as polymetallic-bearing sulfide quartz veins, including vein, quartz-greisens, their distribution spatially related to granitoids. formation of the experienced three stages: wolframite–molybdenite–quartz stage, wolframite–cassiterite–sulfide–quartz fluorite–calcite–carbonate stage. Based on detailed petrographic observations, we conducted microthermometric Raman microspectroscopic studies fluid inclusions formed at different ore-forming stages deposit, identifying four dominant types inclusions: aqueous two-phase inclusions, CO2-bearing solid or daughter mineral-bearing gas-rich inclusions. gas compositions fluids are mostly CO2, CH4, H2O. hydrogen, oxygen, sulfur isotopic data imply that were derived from magmatic fluids, mixed with meteoric water ore-formation process. These results indicate mixing boiling led decomposition metal complex deposition.