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.
出处
《岩石学报》
SCIE
EI
CAS
CSCD
北大核心
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
