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对乔尕山金矿床脆韧性剪切变质成矿作用阶段形成的受不同程度剪切的石英脉中流体包裹体气相成分分析表明 ,由糜棱岩化石英脉→初糜棱岩石英脉→石英脉糜棱岩 ,气相成分总量及主要组分 H2 O和 CO2 的含量均呈有规律的降低。两个主要成矿阶段形成的石英脉具有相似的 H、O同位素组成 ,δ1 8OH2 O=5 .2 5‰～ 9.5 4‰ ,δDH2 O=- 70 .9‰～ - 42 .0‰ ,受剪切岩石中矿物流体包裹体所代表的流体是韧性剪切带金矿床成矿流体的主要来源之一 ,剪切变质作用使成矿流体发生均一化作用 ,其 H、O同位素组成具有窄的变化范围
The gas composition analysis of fluid inclusions in quartz veins with different degrees of shear formed during the brittle-ductile shear metamorphism and mineralization of the Qiaoyashan gold deposit shows that the gas-phase composition of the fluid inclusions in the quartz veins with mylonitized rocks → quartz veins of early mylonites → quartz Vein mylonite, the total amount of gas phase composition and the main components of H2 O and CO2 content showed a regular decrease. The quartz veins formed in the two major metallogenic stages have similar H and O isotopic compositions with δ1 8OH2 O = 5.25 ‰ ~ 9.5 4 ‰ and δDH2O = -70.9 ‰ ~ -42.0 ‰ The fluid represented by fluid inclusions in cut rock is one of the main sources of ore-forming fluid in the ductile shear zone gold deposit. The shear metamorphism has the effect of homogenizing the ore-forming fluid and the H and O isotopic composition has a narrow variation range