Petrogenesis of Late Triassic granitoids and their enclaves with implications for post-collisional lithospheric thinning of the Liaodong Peninsula, North China Craton
文献类型：期刊论文
| 作者 | Yang, Jin-Hui; Wu, Fu-Yuan; Wilde, Simon A.; Liu, Xiao-Ming |
| 刊名 | CHEMICAL GEOLOGY
 |
| 出版日期 | 2007-07-30 |
| 卷号 | 242期号:1-2页码:155-175 |
| 关键词 | Mafic microgranular enclaves granite Late Triassic lithospheric thinning North China Craton |
| ISSN号 | 0009-2541 |
| DOI | 10.1016/j.chemgeo.2007.03.007 |
| 文献子类 | Article |
| 英文摘要 | Major and trace element, Sr-, Nd- and Hf-isotope, zircon U-Pb and Hf-isotope data are reported for mafic microgranular enclaves and host granitoids from the Xiuyan pluton in the Liaodong Peninsula of the eastern North China Craton, in order to investigate their sources, petrogenesis and tectonic implications. The zircon U-Pb age of the enclaves (211 I Ma) is identical to that of the host granite (210 +/- 1 Ma), establishing that the mafic and felsic magmas were coeval. The enclaves have high MgO concentrations at low silica contents and positive epsilon(Ht)(t) values. They are enriched in large ion lithophile and light rare earth elements and depleted in high field strength elements, which can be explained as melts derived from a depleted (asthenosphelic) mantle, with some crustal contamination. The host granitoids have high SiO2 contents, variable initial Sr-87/(86) Sr ratios and highly negative epsilon(Nd)(t) and epsilon(Hf) t) values, suggesting they were mainly derived from an ancient crustal source, heated by the input of asthenospheric mantle-derived magmas. Field observations, geochronology, geochemistry, Sr and Nd isotopic and zircon Hf isotopic compositions point to a complex petrogenesis, where asthenospheric mantle- and crust-derived magma mixing was coupled with crystal fractionation, thus explaining the genetic link between enclaves and host rocks. Identification of an asthenospheric mantle component in the Xiuyan granitoids suggests asthenospheric mantle upwelling and decompressional melting of the mantle, indicating that post-collisional lithospheric thinning in the Liaodong Peninsula was initiated in the Late Triassic. (C) 2007 Elsevier B.V. All rights reserved. |
| WOS关键词 | SINO-KOREAN CRATON ; U-PB AGES ; COESITE-BEARING ECLOGITES ; HF ISOTOPE COMPOSITION ; SULU OROGENIC BELT ; TECTONIC IMPLICATIONS ; ULTRAHIGH-PRESSURE ; EASTERN CHINA ; TRACE-ELEMENT ; MICROGRANITOID ENCLAVES |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000248433400009 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/68160]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Yang, Jin-Hui |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Curtin Univ Technol, Dept Appl Geol, Perth, WA 6845, Australia 3.Nw Univ, State Key Continental Dynam, Xian 750069, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Jin-Hui,Wu, Fu-Yuan,Wilde, Simon A.,et al. Petrogenesis of Late Triassic granitoids and their enclaves with implications for post-collisional lithospheric thinning of the Liaodong Peninsula, North China Craton[J]. CHEMICAL GEOLOGY,2007,242(1-2):155-175. |
| APA | Yang, Jin-Hui,Wu, Fu-Yuan,Wilde, Simon A.,&Liu, Xiao-Ming.(2007).Petrogenesis of Late Triassic granitoids and their enclaves with implications for post-collisional lithospheric thinning of the Liaodong Peninsula, North China Craton.CHEMICAL GEOLOGY,242(1-2),155-175. |
| MLA | Yang, Jin-Hui,et al."Petrogenesis of Late Triassic granitoids and their enclaves with implications for post-collisional lithospheric thinning of the Liaodong Peninsula, North China Craton".CHEMICAL GEOLOGY 242.1-2(2007):155-175. |
入库方式： OAI收割
来源：地质与地球物理研究所
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