Zircon U-Pb Geochronology and Hf Isotope Geochemistry of Metamorphic Quartz-Monzonite Porphyry from Tongkuangyu Area, Zhongtiao Mountains and Its Geological Implications
详细信息
- 责任者：Li Ningbo (Key Laboratory of Minerology and Metallogeny ; Guangzhou Institute of Geochemistry ; Chinese Academy of Sciences ; Guangzhou 510640 ; China) ; Luo Yong
- 刊名：Acta Petrologica Sinica
- 出版年：2013
- 卷期：29(7)
- 关键词：斑岩铜矿床 ; porphyry copper deposit ; 石英二长岩 ; quartz monzonite ; 石英斑岩 ; quartz porphyry ; 铀—铅计时 ; U-Pb dating ; 中条山 ; Zhongtiao Mountains
- 页码：p.2416-2424
- 图表：5 illus., 2 tables, 53 refs.
- 分类号：1001
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
The formation time of the metamorphic quartz-monzonite porphyry associated with the Tongkuangyu porphyry copper deposit is still controversy. A set of zircon U-Pb geochronology and in-stiu Hf isotopic date was presented in this study for the metamorphic quartz-monzonite porphyry. The result show that the discordia upper intercept age 2121 ± 10Ma and 207 Pb / 206 Pb age range from 2065Ma to 2196Ma,have a weighted average age 2117 ± 13Ma. This age ( 2117 ± 13Ma) is accounted as the formation time of the metamorphic quartz-monzonite porphyry from Tongluangyu porphyry copper deposit,and is approximately consistent with the extension of the North China Craton ( NCC) ,especially the activity of Zhongtiao rift which is located in the southern part of NCC. In addition,zircons Hf isotopic characteristics ( ε Hf ( t) range from - 7. 79 to 0. 39) indicate that the old crustal materials played an important role in the petrogenesis. So,we conclude that the Tongkuangyu porphyry Cu deposit is a typical porphyry Cu deposit formed in inner continental settings,which genetic with the large-scale extension of the NCC.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |