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北祁连山西段金矿床以剪切带型为主 ,控矿的主导因素是剪切构造和成矿流体。对寒山、鹰嘴山和珠龙等代表性矿床的流体包裹体的研究表明 ,产于剪切带中金矿床的成矿流体具有中低温、低密度和低盐度等特点 ,包裹体中气体和液体 CO2 / H2 O比值较高。稳定同位素研究结果表明 ,不同矿床的成矿流体来源不尽相同 ,鹰嘴山矿床和寒山矿床成矿流体来源以深部流体为主 ,珠龙矿床的成矿流体主要为大气降水
The gold deposits in the western part of North Qilian Mountains are dominated by shear zones and the dominant factors controlling ore production are shear structures and ore-forming fluids. The study of fluid inclusions in representative deposits such as Hanshan, Yingzishan and Zhu Long shows that the ore-forming fluids produced in the gold deposits in the shear zone are characterized by medium and low temperature, low density and low salinity. The gas inclusions And liquid CO2 / H2 O ratio higher. The results of stable isotope studies show that the sources of ore-forming fluid are different in different deposits. The source of ore-forming fluid in Yingzishan deposit and Hanshan ore deposit is dominated by deep fluid. The ore-forming fluid of Zhulong deposit is mainly atmospheric precipitation