Zircon U-Pb ages of the Qinling Group in Danfeng area: Recording Mesoproterozoic and Neoproterozoic magmatism and Early Paleozoic metamorphism in the North Qinling terrain
文献类型：期刊论文
| 作者 | Yang Li1,2; Chen FuKun3; Yang YiZeng3; Li ShuangQing3; Zhu XiYan1 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2010-05-01 |
| 卷号 | 26期号:5页码:1589-1603 |
| 关键词 | Qinling Group Gneiss Zircon age Neoproterozoic Tectonic provenance |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | The Qinling Group is considered as the oldest basement rocks of Precambrian exposed in the North Qinling terrain and records crustal formation and evolution of North Qinling orogenic belt. In this study, zircon U-Pb ages of five gneiss samples collected from Danfeng-Xixia area are reported in order to constrain the time of formation and metamorphism of this rock group and discuss the tectonic provenance of the North Qinling terrain. Analytical results of the zircon dating show that zircon grains of magmatic origin yield ages clustering in about 1400 similar to 1600Ma and about 850 similar to 950Ma, recording two major magmatic activities. Six zircon grains of metamorphic origin with low Th/U ratios of < 0.03 give (206)Pb/(238)U ages ranging from 510 Ma to 465 Ma with a weighted mean value of 477 +/- 18Ma, recording Early Paleozoic metamorphic overprint. This metamorphism is temporally coincident with the high pressure metamorphism distinguished in both the northern and southern margins of the Qinling terrain, indicating that Qinling Group underwent metamorphism during the North Qinling orogenic process in Early Paleozoic. Qinling Group formed mainly in Late Mesoproterozoic to Early Neoproterozoic and no magmatic events of Paleoproterozoic and Archean were recorded in the basement rocks. In the view of the formation time of the magmatic activities, the North Qinling terrain can be discriminated from the Yangtze block characterized of strong magmatism of Late Neoproterozoic along the northern margin and also from the North China block that is composed of Late Archean to Paleoproterozoic basement rocks along the southern margin. The North Qinling terrain would be a microcontinent with distinguishable evolution in Mesoproterozoic to Neoproterozoic. |
| WOS关键词 | LA-ICP-MS ; CENTRAL CHINA ; TECTONIC EVOLUTION ; OROGENIC BELT ; ISOTOPIC COMPOSITION ; YANGTZE BLOCK ; SOUTH CHINA ; GEOCHRONOLOGY ; GEOCHEMISTRY ; MOUNTAINS |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000278597800023 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/72228]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Yang Li |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Grad Sch, Sch Earth Sci, Beijing 100039, Peoples R China 3.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang Li,Chen FuKun,Yang YiZeng,et al. Zircon U-Pb ages of the Qinling Group in Danfeng area: Recording Mesoproterozoic and Neoproterozoic magmatism and Early Paleozoic metamorphism in the North Qinling terrain[J]. ACTA PETROLOGICA SINICA,2010,26(5):1589-1603. |
| APA | Yang Li,Chen FuKun,Yang YiZeng,Li ShuangQing,&Zhu XiYan.(2010).Zircon U-Pb ages of the Qinling Group in Danfeng area: Recording Mesoproterozoic and Neoproterozoic magmatism and Early Paleozoic metamorphism in the North Qinling terrain.ACTA PETROLOGICA SINICA,26(5),1589-1603. |
| MLA | Yang Li,et al."Zircon U-Pb ages of the Qinling Group in Danfeng area: Recording Mesoproterozoic and Neoproterozoic magmatism and Early Paleozoic metamorphism in the North Qinling terrain".ACTA PETROLOGICA SINICA 26.5(2010):1589-1603. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。