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Genesis of late Early Cretaceous high-silica rhyolites in eastern Zhejiang Province, southeast China: A crystal mush origin with mantle input

文献类型：期刊论文

作者Zhang, Ji-Heng1; Yang, Jin-Hui2; Chen, Jing-Yuan3; Wu, Fu-Yuan2; Wilde, Simon A.4
刊名LITHOS
出版日期2018
卷号296页码:482-495
关键词High-silica Rhyolite Upper Volcanic Sequence Eastern Zhejiang Province Zircon U-pb Age And Hf-o Isotopes Crystal Mush Reworking
ISSN号0024-4937
DOI10.1016/j.lithos.2017.11.026
文献子类Article
英文摘要Voluminous Mesozoic felsic volcanic rocks and granites in southeastern China provide a unique opportunity for studying the role of crustal magmatism in the evolution and modification of the crust in the eastern Cathaysia Block. The high-silica rhyolites of the upper volcanic sequence in eastern Zhejiang Province were investigated, focusing on their genesis and their relationship with contemporaneous granites. Rhyolites in the Tiantai, Yongkang and Liucheng basins were dated as late Early Cretaceous (from 111 Ma to 106 Ma in age). These rocks contain a large proportion of inherited zircons of ca. 130 Ma, corresponding to the age of the lower volcanic sequence in the area. However, the zircons of different ages have similar ranges of oxygen and Hf isotopes, implying similarities in the magmas from which they were generated. The rhyolites of the upper sequence also resemble those of the lower sequence in terms of their geochemistry. It is concluded that the former were derived by reworking of magma mush formed during the earlier magmatic episode via fractionation of feldspars and accessory minerals, e.g., zircon. Fractionation took place within the magma crystal mush by extraction of interstitial melts and accumulation of residual mineral phases, aided by the emplacement of contemporaneous basaltic magmas at the base of the crust. Overall, the geochemical features of the volcanic rocks in southeastern China indicate that episodic magmatism and reworking of crystal mush were essential mechanisms that drove the evolution of the igneous rocks and the hence crustal architecture in this area. (C) 2017 Elsevier B.V. All rights reserved.
WOS关键词ZIRCON U-PB ; PALEO-PACIFIC SUBDUCTION ; PRECAMBRIAN CONTINENTAL-CRUST ; YELLOWSTONE MAGMATIC SYSTEM ; ND-HF ISOTOPES ; SE CHINA ; CATHAYSIA BLOCKS ; VOLCANIC-ROCKS ; TECTONIC EVOLUTION ; IGNEOUS ROCKS
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
WOS记录号WOS:000423890600031
出版者ELSEVIER SCIENCE BV
资助机构Chinese Ministry of Science and Technology(2012CB416702) ; Chinese Ministry of Science and Technology(2012CB416702) ; Chinese Ministry of Science and Technology(2012CB416702) ; Chinese Ministry of Science and Technology(2012CB416702) ; Chinese Ministry of Science and Technology(2012CB416702) ; Chinese Ministry of Science and Technology(2012CB416702) ; Chinese Ministry of Science and Technology(2012CB416702) ; Chinese Ministry of Science and Technology(2012CB416702)
源URL[http://ir.iggcas.ac.cn/handle/132A11/82604]  
专题中国科学院地质与地球物理研究所
通讯作者Zhang, Ji-Heng
作者单位1.Univ Chinese Acad Sci, Coll Earth Sci, Key Lab Computat Geodynam, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
3.Changan Univ, Sch Earth Sci & Resources, Xian 710054, Shaanxi, Peoples R China
4.Curtin Univ, Dept Appl Geol, GPO Box U1987, Perth, WA 6845, Australia
推荐引用方式
GB/T 7714		 Zhang, Ji-Heng,Yang, Jin-Hui,Chen, Jing-Yuan,et al. Genesis of late Early Cretaceous high-silica rhyolites in eastern Zhejiang Province, southeast China: A crystal mush origin with mantle input[J]. LITHOS,2018,296:482-495.
APA Zhang, Ji-Heng,Yang, Jin-Hui,Chen, Jing-Yuan,Wu, Fu-Yuan,&Wilde, Simon A..(2018).Genesis of late Early Cretaceous high-silica rhyolites in eastern Zhejiang Province, southeast China: A crystal mush origin with mantle input.LITHOS,296,482-495.
MLA Zhang, Ji-Heng,et al."Genesis of late Early Cretaceous high-silica rhyolites in eastern Zhejiang Province, southeast China: A crystal mush origin with mantle input".LITHOS 296(2018):482-495.

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来源：地质与地球物理研究所

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