华北克拉通北缘鸡冠山斑岩钼矿床成矿年代及印支期成矿事件  

Ore-forming time of the Jiguanshan porphyry molybdenum deposit, northern margin of North China Craton and the Indosinian mineralization.

作　　者：曾庆栋[1] 刘建明[1] 张作伦[1] 覃锋[1] 陈伟军[1] 张瑞斌[1] 于昌明[1] 叶杰[1] 

机构地区：[1]中国科学院矿产资源研究重点实验室,中国科学院地质与地球物理研究所,北京100029

出　　处：《岩石学报》2009年第2期393-398,共6页Acta Petrologica Sinica

基　　金：国家973项目(2006CB403507)资助成果

摘　　要：鸡冠山斑岩钼矿床是华北克拉通北缘少为人知的中生代西拉沐伦钼矿带中最大的钼矿床之一。它与鸡冠山次火山杂岩有关,杂岩体受NW向、NE向及NEE向三组断裂控制。锆石SHRIMP U-Pb定年表明,发育钼矿化的矿区内最晚的花岗斑岩侵位于245±2.7Ma。这表明,鸡冠山钼矿化发生在印支期。结合已有资料分析,认为华北克拉通北缘曾在印支期发生重要的岩浆-成矿事件。The Jiguanshan porphyry molybdenum deposit is one of the largest deposits of a poorly known Mesozoic Xilamulun Mo metallogenic belt in the northern margin of North China Craton. It is related to a succesion of subvolcanic complex which is controlled by three group faults (NW-trending, NE-trending and NEE-trending). Ziron SHRIMP U-Pb data indicate that the last granite porphyry intrusive of the Jiguanshan complex, with molybdenum mineralization crystallized at 245 +/- 2.7Ma. This shows that the Mo mineralization occurred in Indosinian Orogeny or Triassic Period. Based on summarizing the available isotope ages, this paper suggests that a significant magmatism-mineralization event occured in northern margin of North China Craton during Indosinian Orogeny.

关 键 词：印支期成矿作用 锆石SHRIMP U-PB定年 鸡冠山斑岩钼矿床 西拉沐伦成矿带 华北克拉通北缘 

分 类 号：P618.65[天文地球—矿床学] P597.3[天文地球—地质学]