论文部分内容阅读
赣南葛廷坑钼矿为产在花岗斑岩与围岩内外接触带的中型斑岩型钼矿床。通过对矿区含矿石英脉中7个辉钼矿样品进行Re-Os同位素测定,获得等时线年龄及模式年龄的加权平均值分别为(159.4±1.6)和(158.8±1.3)Ma。等时线初始187Os为(0.001±0.055)ng/g,MSWD=1.7。葛廷坑钼矿形成于中侏罗世中晚期,其成矿年龄对应于华南中晚侏罗世第二成矿阶段(170~150 Ma),与区域内160 Ma左右的钨锡矿成矿作用基本一致。区域上华南钼的成矿时间具有连续性,在165~90 Ma均有发生。
Ge Tingkeng molybdenum deposit in Gannan is a medium-sized porphyry-type molybdenum deposit that is located in the contact zone between granite porphyry and the surrounding rock. By means of Re-Os isotope analysis of seven molybdenite samples from ore-bearing quartz veins, the weighted average of isochron age and model age were (159.4 ± 1.6) and (158.8 ± 1.3) Ma, respectively. The initial 187Os for the isochores were (0.001 ± 0.055) ng / g and MSWD was 1.7. The Getingkeng molybdenum deposit was formed in the middle and late Middle Jurassic. Its metallogenic age corresponds to the second stage of mineralization (170-150 Ma) in the middle-late Jurassic in southern China, and is similar to that of the 160-Ma tungsten-tin mineralization in the area Consistent. The metallogenic time of molybdenum in South China is continuous in the region and occurs at 165 ~ 90 Ma.