Destruction of ancient lower crust through magma underplating beneath Jiaodong Peninsula, North China Craton: U-Pb and Hf isotopic evidence from granulite xenoliths
文献类型：期刊论文
| 作者 | Zhang, Hong-Fu1,2 |
| 刊名 | GONDWANA RESEARCH
 |
| 出版日期 | 2012 |
| 卷号 | 21期号:1页码:281-292 |
| 关键词 | Zircon U-Pb dating Hf isotopes Magma underplating Archean lower crust North China Craton |
| ISSN号 | 1342-937X |
| DOI | 10.1016/j.gr.2011.05.013 |
| 英文摘要 | Zircons from granulite xenoliths entrained in a Late Cretaceous mafic dike in the Jiaodong Peninsula, North China Craton (NCC), show three distinct U-Pb age populations. Part of the old zircon grains yield discordant data that project to ages of about 2.4 to 2.5 Ga, a few grains indicate growth at about 2.0 Ga and a third group yield Cretaceous ages with peaks at 120 and 90 Ma. The oldest zircons give Hf T-DM model ages of 2.6-2.8 Ga. These results demonstrate the existence of original Archean lower crust in the Jiaodong region. Zircons of 2.0 Ga have similar Hf T-DM model ages as the Neoarchean-Paleoproterozoic grains, suggesting that these zircons were products of metamorphic recrystallization due to thermal event without juvenile input. Early Cretaceous zircons yield epsilon Hf(t) values of -21 to -12 and Late Cretaceous zircons large variable epsilon Hf(t) from +4 to -50. These data suggest that magmatic underplating occurred in the Neoarchean to Earliest Proterozoic lower crust of the NCC, both in the Early and Late Cretaceous. It is suggested that the Mesozoic magma underplating, which also provided the heat source for the voluminous Mesozoic magmatism in the NCC, significantly modified the composition of the Archean to Paleoproterozoic lower crust of the NCC. (C) 2011 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000300204400021 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/84418]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Zhang, Hong-Fu |
| 作者单位 | 1.NW Univ Xian, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Peoples R China 2.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 | Zhang, Hong-Fu. Destruction of ancient lower crust through magma underplating beneath Jiaodong Peninsula, North China Craton: U-Pb and Hf isotopic evidence from granulite xenoliths[J]. GONDWANA RESEARCH,2012,21(1):281-292. |
| APA | Zhang, Hong-Fu.(2012).Destruction of ancient lower crust through magma underplating beneath Jiaodong Peninsula, North China Craton: U-Pb and Hf isotopic evidence from granulite xenoliths.GONDWANA RESEARCH,21(1),281-292. |
| MLA | Zhang, Hong-Fu."Destruction of ancient lower crust through magma underplating beneath Jiaodong Peninsula, North China Craton: U-Pb and Hf isotopic evidence from granulite xenoliths".GONDWANA RESEARCH 21.1(2012):281-292. |
入库方式： OAI收割
来源：地质与地球物理研究所
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