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Long-lived melting of ancient lower crust of the North China Craton in response to paleo-Pacific plate subduction, recorded by adakitic rhyolite
Wang, Chao1,2; Song, Shuguang1; Niu, Yaoling2,3; Allen, Mark B.2; Su, Li4; Wei, Chunjing1; Zhang, Guibin1; Fu, Bin5
2017-11-01
发表期刊LITHOS
卷号292页码:437-451
文章类型Article
摘要Magmatism in eastern China in response to paleo-Pacific plate subduction during the Mesozoic was complex, and it is unclear how and when exactly the magmas formed via thinning and partial destruction of the continental lithosphere. To better understand this magmatism, we report the results of a geochronological and geochemical study of Early Cretaceous adakitic rhyolite (erupted at 125.4 +/- 2.2 Ma) in the Xintaimen area within the eastern North China Craton (NCC). In situ zircon U-Pb dating shows that this adakitic rhyolite records a long (similar to 70 Myrs) and complicated period of magmatism with concordant (206)pb/U-238 ages from 193 Ma to 117 Ma. The enriched bulk rock Sr-Nd isotopic compositions of the Xintaimen adakitic rhyolite, as well as the enriched zircon Hf and O isotopic compositions, indicate that the magmas parental to the adakitic rhyolite were derived from partial melting of the Paleoproterozoic mafic lower crust, heated by mafic melts derived from the mantle during the paleo-Pacific plate subduction. A minor older basement component is indicated by the presence of captured Neoarchean to Early Paleoproterozoic zircons. The Mesozoic zircons have restricted Hf and O isotopic compositions irrespective of their ages, suggesting that they formed from similar sources at similar melting conditions. The Xintaimen adakitic rhyolite offers an independent line of evidence that the ancient lower crust of eastern China underwent a long period (similar to 70 Myrs) of destruction, melting or remelting, from similar to 193 to similar to 120 Ma, related to the subduction of the paleo-Pacific plate beneath eastern China. (C) 2017 Elsevier B.V. All rights reserved.
关键词Adakitic Rhyolite Long-lived Lower Crustal Melting Cratonic Destruction Paleo-pacific Plate Subduction North China Craton
DOI10.1016/j.lithos.2017.09.031
收录类别SCI
语种英语
WOS记录号WOS:000416185500029
引用统计
文献类型期刊论文
版本出版稿
条目标识符http://ir.qdio.ac.cn/handle/337002/143275
专题海洋地质与环境重点实验室
作者单位1.Peking Univ, Sch Earth & Space Sci, MOE Key Lab Orogen Belts & Crustal Evolut, Beijing 100871, Peoples R China
2.Univ Durham, Dept Earth Sci, Durham DH1 3LE, England
3.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
4.Chinese Univ Geosci, Sch Sci Res, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China
5.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 2601, Australia
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Wang, Chao,Song, Shuguang,Niu, Yaoling,et al. Long-lived melting of ancient lower crust of the North China Craton in response to paleo-Pacific plate subduction, recorded by adakitic rhyolite[J]. LITHOS,2017,292:437-451.
APA Wang, Chao.,Song, Shuguang.,Niu, Yaoling.,Allen, Mark B..,Su, Li.,...&Fu, Bin.(2017).Long-lived melting of ancient lower crust of the North China Craton in response to paleo-Pacific plate subduction, recorded by adakitic rhyolite.LITHOS,292,437-451.
MLA Wang, Chao,et al."Long-lived melting of ancient lower crust of the North China Craton in response to paleo-Pacific plate subduction, recorded by adakitic rhyolite".LITHOS 292(2017):437-451.
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