LA-ICP-MS Zircon U-Pb Dating of Granitoid Intrusions Related to Iron-Copper Polymetallic Deposits in Luonan-Lushi Area of Southern North China Craton and Its Geological Implications
详细信息
- 责任者：Hu Hao (State Key Laboratory of Geological Processes and Mineral Resources ; Faculty of Earth Resources ; China University of Geosciences ; Wuhan 430074 ; China) ; Li Jianwei
- 刊名：Mineral Deposits
- 出版年：2011
- 卷期：30(6)
- 关键词：铁矿 ; iron ores ; 铜矿 ; copper ores ; 铀—铅计时 ; U-Pb dating ; 秦岭 ; Qinling Mountains
- 页码：p.979-1001
- 图表：8 illus., 1 table, 71 refs.
- 分类号：1001
- issnNo：ISSN0258-7106
- isbnNo：CN11-1965/P
摘要
Granitoid intrusions, which are widely distributed in Luonan-Lushi area on the southern margin of the North China Craton, consist mostly of K-feldspar granite porphyry and quartz diorite and are closely related to lots of porphyry and skarn Fe-Cu-Mo-Pb-Zn polymetallic deposits in this area. The results indicate that these intrusions were emplaced in the time interval from (158±2) Ma to (131±1) Ma (2σ), suggesting that they are products of Late Jurassic to Early Cretaceous magmatism. These results document an extensive magmatic event at the southern edge of the North China Craton that commenced in the Late Jurassic, climaxed in the Early Cretaceous and continued until the end of Late Cretaceous.