论文部分内容阅读
次火山岩型矿床的成矿作用受次火山活动控制。铜多金属矿床与中酸性岩类有成因联系,银多金属矿床与酸性岩类关系更密切。中酸性火山—次火山岩Cu的丰度值较高,酸性岩类Pb、Zn、Ag丰度值高,各自代表原始岩浆为富含矿源质的。稀土元素表明,与铜矿有关的岩浆为同熔型,而与银多金属矿有关的为地壳重熔型。矿床是在中低温、低盐度条件下形成的。其成矿时代为燕山早期晚阶段或燕山晚期,其年龄值为78Ma~147Ma
The secondary volcanic type ore deposit metallogenesis controlled by sub-volcanic activity. The copper-polymetallic deposits are genetically linked to medium-acidic rocks, and the silver-polymetallic deposits are more closely related to acidic rocks. The moderately acidic volcano-subvolcanic rocks have a higher abundance of Cu, and higher abundance values of acidic rocks Pb, Zn and Ag, each representing that the original magma is rich in mineralogical origin. Rare earth elements indicate that the magma associated with the copper deposit is the same melt type, whereas the crustal remelt type associated with the silver polymetallic deposit. The deposit is formed at low and low salinity conditions. The metallogenic epoch is late Yanshanian or late Yanshanian, with an age of 78Ma ~ 147Ma