LA-ICPMS Zircon U-Pb Age and the Geological Significance for Yichun Mesozoic Granites in Southeast Lesser
详细信息
- 责任者：Yang Changjiang (First Geologic Survey of Jilin Province ; Changchun 130033 ; China) ; Wang Yachun
- 刊名：Jilin Geology
- 出版年：2010
- 卷期：29(4)
- 关键词：花岗岩 ; granite ; 铀—铅计时 ; U-Pb dating ; 小兴安岭 ; Xiao Hinggan Mountains
- 页码：p.1-5，31
- 图表：3 illus., 1 table, 19 refs.
- 分类号：0801
- issnNo：ISSN1001-2427
- isbnNo：CN22-1099/P
摘要
The Wulingsan Nanchasan and Hanyue Tree Farms granites in Southeast Lesser Khingan Range was firstly dated by high precision LA-ICPMS zircon U-Pb dating technique. These three intrusive bodies all were born in Jurassic have the Zircon U-Pb ages of (175± 3), (180±2) and (195±2) Ma, respectively. The study on petrology and geochemistry show that these granites consisted of Monzonite granite and granodiorite, and have some characteristics of high silicon, rich in alkali and calc alkaline series. The authors think these granites generated in the background of spreading tectonics, and are likely to be related to the colliding between Kiamusze plate and Songnen.