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木吉村铜(钼)矿床位于河北省涞源县杨家庄镇木吉村,大地构造处于太行山脉中北段阜平幔枝构造的北东倾伏端,涞源哑铃状杂岩体连接处西侧上盘拆离带的次级断陷盆地中,已探明为一大型铜(钼)金银多金属矿床。在成矿地质背景的基础上,通过对不同钻孔不同深度矿心中5件辉钼矿Re-Os同位素的测定,获得模式年龄变化范围(143.2±2.2)Ma~(144.9±2.3)Ma,加权平均值为(144±1)Ma;并计算得出等时线年龄为(143.8±1.2)Ma,可厘定成矿时限为燕山晚期,这与太行山中北段区域多金属成矿大爆发事件基本一致。此外,根据流体包裹体特征和矿石辉钼矿Re含量,表明包裹体主要有气液两相包裹体、富气相包裹体、含二氧化碳包裹体和气液固多相包裹体4种类型。液相成分和气相成分均以H2O为主,其中气态包裹体还可见CO2;成矿温度大体为中温,盐度为中低盐度;成矿物质来源于地球深部。
Located in Muji Village, Yangjiazhuang Town, Laiyuan County, Hebei Province, the Gejiacun copper (molybdenum) deposit is located on the northerly dip end of the Fuping Mantle structure in the middle-northern part of the Taihang Mountains and on the west side of the junction of the Lüyuan dumbbell-shaped complex rock mass In the secondary rift basin of the detachment belt, it has been proved to be a large copper (molybdenum) gold, silver and polymetallic deposit. Based on the metallogenic geological background, the age range of the model (143.2 ± 2.2) Ma ~ (144.9 ± 2.3) Ma was obtained by measuring the Re-Os isotopes of five molybdenites in ore cores with different depths. (144 ± 1) Ma. The isochron age was calculated to be (143.8 ± 1.2) Ma, which indicates that the metallogenic time limit is the late Yanshanian period. This is consistent with the basic event of the large-scale polymetallic mineralization in the middle and northern parts of the Taihang Mountains Consistent. In addition, according to the characteristics of fluid inclusions and Re content of molybdenite ore, it shows that the inclusions mainly include gas-liquid two-phase inclusions, gas-rich inclusions, carbon dioxide inclusions and gas-liquid-solid multiphase inclusions. The main components of the liquid phase and the gas phase are H2O, of which CO2 is also seen in gaseous inclusions; the temperature of ore-forming is generally medium temperature and the salinity is medium and low salinity; and the ore-forming materials come from the deep part of the earth.