【摘要】 中国陆相次火山岩型铜银矿床分布广泛 ,银矿与酸性岩有关 ,铜矿与次英安玢岩有关。形成时代为燕山早、晚期。石英的δ18O值在 +7.9‰～ +16 .3‰之间 ,δ18OH2 O值在 - 3.0‰～ +8.1‰之间 ,δD在 - 5 5‰～ - 10 6‰之间。硫化物的δ3 4 S值在 - 9.8‰～ +9.6‰之间 ,硫化物的硫同位素富集顺序为δ3 4 SPy>δ3 4 SSp>δ3 4 SGn>δ3 4 SPo,硫化物矿物对平衡温度在 16 0～4 0 0℃ ,大多数溶液的硫同位素平均组成 (δ3 4 SΣS)为 +2‰～ +5‰ ,个别为 +2 0‰。更多还原

【Abstract】 Continental subvolcanic Cu-Ag ore deposits are widely distributed in China. The formation of Ag deposits is related to acidic rocks and that of Cu deposits to subdacite. The formation epoch seems to be early and late Yanshanisn. The δ 18 O values of quartz,the δ 18 O H₂O values,the δD values and the δ 34 S values of sulfides are from +7.9‰ to +16.3‰,from -3.0‰ to +8.1‰,from -55‰ to -106‰,and from -9.8‰ to +9.6‰,respectively. The enrichment of S isotopes in sulfides is in order of δ 34 S Py ,δ 34 S Sp ,δ 34 S Gn ,and δ 34 S Po . The equilibration temperatures of sulfide ores are from 160 ℃ to 400 ℃.The values of S isotopes in solution are mostly from +2‰ to +5‰,with a few being +20‰.更多还原