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杜荒岭金矿床是产于石英闪长岩、受压性、压扭性断裂和爆破角砾岩筒联合控制的浅成中温岩浆热液矿床。流体包裹体研究表明:①流体包裹体的类型以气液两相包裹体为主,其次为纯液相包裹体、气相包裹体及少量含NaCl子矿物三相原生流体包裹体,成矿流体属NaCl--H2O体系;②主成矿阶段均一温度为200℃~375℃,集中在230℃~320℃;流体具有低密度(0.68~0.94 g/cm3),低盐度(3.39~13.07(wt%,NaCl))的特征,成矿压力为7.5~14.3 MPa,估算成矿深度1.2~1.6 km;③结合新近同位素、微量元素及年代学研究成果,认为杜荒岭金矿主要与晚燕山期岩浆活动有关,成矿流体源于岩浆热液,流体上升过程中发生隐爆和沸腾作用,同时伴有部分大气降水加入,导致成矿物质快速沉淀富集。
Duhuangling gold deposit is produced in the quartz diorite, compressive, compressive-shear fracture and blasting breccia tube joint control of shallow-medium temperature magmatic hydrothermal deposits. Fluid inclusion studies show that: ① fluid inclusions are dominated by gas-liquid two-phase inclusions, followed by pure-liquid inclusions, gas inclusions and a few three-phase primary fluid inclusions containing NaCl mineralization, NaCl - H2O system. ② The homogenization temperatures of the main mineralization stages range from 200 ℃ to 375 ℃, and the concentration ranges from 230 ℃ to 320 ℃. The low density (0.68 ~ 0.94 g / cm3) and low salinity (3.39 ~ 13.07 wt %, NaCl)), the metallogenetic pressure is 7.5 ~ 14.3 MPa and the estimated metallogenic depth is 1.2 ~ 1.6 km. ③According to the results of recent isotopes, trace elements and chronology, it is concluded that the Duhuangling gold deposit is mainly associated with Late Yanshanian The magmatic activity is related to that the ore-forming fluid is derived from magmatic hydrothermal fluid, and the implosion and boiling occur during fluid ascending. At the same time, part of the atmospheric precipitation is added, resulting in rapid precipitation and enrichment of metallogenic material.