Zircon hf isotope compositions of middle Jurassic-Early Cretaceous intrusions in Shandong Province and its implications
文献类型：期刊论文
| 作者 | Xu Y G; Wu X Y; Luo Z Y; Ma J L; Huang X L; Xie L W |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2007-02-01 |
| 卷号 | 23期号:2页码:307-316 |
| 关键词 | zircon Hf isotope middle Jurassic-Early Cretaceous intrusion lithospheric evolution petrogensis Shandong |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | In-situ Hf isotope analyses have been carried out on zircons from Jurassic-Early Cretaceous intrusions in Shandong Province. It is shown that the inherited zircons, which were formed during the late Archean ( upper intercept age similar to 2.5Ga), have positive epsilon(Hf)(t) (+8 similar to +1), with Hf model ages clustering between 2.6 similar to 2. 8Ga.These Hf isotopic compositions and model ages are very similar to those of mafic lower crustal xenoliths included in the Paleozoic kimerlites in Fuxian, Liaoning province. The Hf model ages are also similar to the Nd model age of the crust in the North China craton. These inherited zircons are therefore interpreted as derived from the mafic lower crust which was underplated during the late Archean time. New zircons, occurring as rim surrounding inherited zircons or as separate crystals, have U-Pb ages of 177 Ma and 132 similar to 126 Ma. Their epsilon(Hf) (t) are negative ranging from - 23 to - 1. It is proposed that Mesozoic intrusions from Shandong were generated as a result of interplay between three components, namely, enriched lithospheric mantle, depleted mantle and crust. Specifically, Jurassic monzonites from Tongshi, which were derived from late Archean lower crust, provide constraint on the Hf isotopic composition of the lower crust component (epsilon(Hf)(t) = - 20); while gabbroic rocks from Yinan, which were originated from the enriched lithospheric mantle, backup the epsilon(Hf)(t) of the enriched mantle composition of -16. The extremely large variation in epsilon(Hf)(t) (-20 similar to - I) in some samples mirrors the progressive participation of depleted mantle components during magma generation. This change in magmatic source resulted from the lithospheric thinning process which was widespread during the late Mesozoic in North China. |
| WOS关键词 | NORTH CHINA CRATON ; SINO-KOREAN CRATON ; LOWER CRUST BENEATH ; LU-HF ; U-PB ; CONTINENTAL-CRUST ; LITHOSPHERIC MANTLE ; GRANULITE XENOLITHS ; JIAODONG PENINSULA ; EASTERN CHINA |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000245763200011 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/68192]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Xu Y G |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Isotope Geochronol & Geochem, Guangzhou 510640, Peoples R China 2.Grad Univ Chinese Acad Sci, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu Y G,Wu X Y,Luo Z Y,et al. Zircon hf isotope compositions of middle Jurassic-Early Cretaceous intrusions in Shandong Province and its implications[J]. ACTA PETROLOGICA SINICA,2007,23(2):307-316. |
| APA | Xu Y G,Wu X Y,Luo Z Y,Ma J L,Huang X L,&Xie L W.(2007).Zircon hf isotope compositions of middle Jurassic-Early Cretaceous intrusions in Shandong Province and its implications.ACTA PETROLOGICA SINICA,23(2),307-316. |
| MLA | Xu Y G,et al."Zircon hf isotope compositions of middle Jurassic-Early Cretaceous intrusions in Shandong Province and its implications".ACTA PETROLOGICA SINICA 23.2(2007):307-316. |
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。