作　　者： (周国超）; (王玉往）; (李德东）; (石煜）; (解洪晶）;

机构地区： 昆明理工大学国土资源工程学院,昆明650093

出　　处： 《矿物岩石地球化学通报》 2017年第4期620-627,共8页

摘　　要： 白云金矿是辽东青城子矿集区北部典型的岩浆热液型金矿床,矿区发育有花岗斑岩、石英斑岩、闪长玢岩、煌斑岩和二长斑岩等脉岩,其中花岗斑岩和石英斑岩常产于金矿体的上下盘,与成矿空间关系密切。本文通过锆石U-Pb年代学测试,精确厘定花岗斑岩和石英斑岩的年龄分别是218.56±0.37 Ma和218.5±2.9 Ma,为印支期岩浆作用的产物;二长斑岩的年龄为164.44±0.38 Ma,属燕山期。综合研究表明,白云矿区金矿体与印支期花岗斑岩和石英斑岩可能是同一岩浆体系的产物。 The Baiyun gold deposit is a significant magmatic hydrothermal gold deposit in the northern Qingchengzi orefield in the eastern Liaoning province. A series of dykes such as granite porphyry,quartz porphyry,diorite porphyry,lamprophyre,and monzonite porphyry are well developed in the deposit. Granite porphyry and quartz porphyry generally occurred in the hangingwalls and footwalls of gold orebodies,with close spatial relationship between porphyries and gold mineralization. Our obtained zircon U-Pb ages of 218. 56 ± 0. 37 Ma and 218. 5 ± 2. 9 Ma for granite prophyry and quartz prophyry,respectively,indicate that these porphyries are products of Indosinian magmatism. However,the zircon U-Pb age of 164. 44±0. 38 Ma for the monzonite porphyry show that this porphyry was formed in Yanshanian epoch. Integrating with previous researches,we have concluded that orebodies,and Indosinian granite prophyry and quartz prophyry in the Baiyun gold deposit could be products of the same magma system.

关 键 词： 锆石 年代学 脉岩 岩石成因 白云金矿 辽东