Micro-scale heterogeneity of andesite from Chilungshan, northern Taiwan:;Evidence from melt inclusions, geochronology and Hf-O isotopes of;zircons

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	Micro-scale heterogeneity of andesite from Chilungshan, northern Taiwan:;Evidence from melt inclusions, geochronology and Hf-O isotopes of;zircons
	Wan, Yusheng 5; Ho, Kungsuan ; Liu, Dunyi ; Zhou, Hongying ; Dong, Chunyan ; Ma, Mingzhu
刊名	CHEMICAL GEOLOGY
	2012
卷号	328;SI SI 页码:244-258
关键词	Melt inclusion Andesite SHRIMP zircon dating Hf and O isotopes Island arc Northern Taiwan
ISSN号	024QY
英文摘要	The Chilungshan andesite belongs to the Chilung Volcano Group in northern Taiwan and constitutes the western end of the island chains of the Ryukyu arc. Chemically it is a normal, medium-K calc-alkaline andesite. SHRIMP dating of magmatic zircons yielded an emplacement Pb-206/U-238 age of 1.04 +/- 0.06 Ma with epsilon(Hf)(t) of 6.1 to 13.4 and 6180 of 5.02 to 6.28 parts per thousand. The zircons contain inherited cores and felsic to andesitic silicate-melt (glass) inclusions besides apatite, quartz, K-feldspar, biotite, garnet. Fe-Mg minerals (pyroxene or hornblende) and plagioclase with variable An values. Plagioclase phenocrysts also contain quartz. K-feldspar and felsic melt inclusions. This study confirms the presence of micro-scale heterogeneity in the andesite as a result of mixing between mantle-derived and continental material. Contamination of continental crust occurs either within the magma chamber at a medium to deep crustal level and/or during dehydration and melting of a subducted oceanic slab and overlying sediments in an island-arc environment. (C) 2011 Elsevier B.V. All rights reserved.
学科主题	火成岩岩石学
WOS关键词	U-PB GEOCHRONOLOGY ; SILICA-RICH MELTS ; VOLCANIC-ROCKS ; TRACE-ELEMENT ; MAGMA ; MANTLE ; ZONE ; ARC ; EVOLUTION ; FLUIDS
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	We thank Tao Hua for help with mount making, Yu-Hai Zhang and Zhi-Qing;Yang with SHRIMP data collection, Fu-Yuan Wu, Yue-Heng Yang and Li-Wen;Xie with LA-ICP-MS Hf data collection, E. Deloule, Zhi-Qing Yang and;Chen Wang with zircon O isotope analysis, Yu-Guang Ma, Qian Mao and;Zhen-Yu Chen with electron microprobe analyses and CL and BSE imaging,;Zhi Xie with zircon REE analysis, and He Yong and Ling Yan with Raman;spectroscopic analyses. Thanks are also to Ian Williams, Zhao-Hua Luo,;Yong-Fei Zheng, Xi-Sheng Xu, Hong-Rui Fan and Jian-Xin Zhang for help;and discussion in preparing the manuscript. This research benefitted;greatly from contributions by Allen Nutman and Alfred Kroner for;explaining the data and improving the original manuscript. We thank;guest editor Prof. Sun-Lin Chung and two reviewers Prof. Cheng-Hong Chen;and Dr. Greg Shellnutt for their thoughtful comments and suggestions.;This study was financially supported by SKLLE, Institute of Geology and;Geophysics, CAS, the State Key Laboratory of Geological Processes and;Mineral Resources, Wuhan (GPMR201001) and the Beijing SHRIMP Center.
WOS记录号	WOS:000310124900015
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39833]
专题	中国地质调查局天津地质调查中心
作者单位	1.Chinese Acad Geol Sci, Inst Geol, Beijing SHRIMP Ctr, Beijing 100037, Peoples R China. 2.State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China. 3.Natl Museum Nat Hist, Dept Geol, Taichung, Taiwan. 4.Tianjin Inst Geol & Mineral Resources, Tianjin 300170, Peoples R China. 5.中国地质科学院地质研究所
推荐引用方式 GB/T 7714	Wan, Yusheng,Ho, Kungsuan,Liu, Dunyi,et al. Micro-scale heterogeneity of andesite from Chilungshan, northern Taiwan:;Evidence from melt inclusions, geochronology and Hf-O isotopes of;zircons[J]. CHEMICAL GEOLOGY,2012,328;SI SI:244-258.
APA	Wan, Yusheng,Ho, Kungsuan,Liu, Dunyi,Zhou, Hongying,Dong, Chunyan,&Ma, Mingzhu.(2012).Micro-scale heterogeneity of andesite from Chilungshan, northern Taiwan:;Evidence from melt inclusions, geochronology and Hf-O isotopes of;zircons.CHEMICAL GEOLOGY,328;SI SI,244-258.
MLA	Wan, Yusheng,et al."Micro-scale heterogeneity of andesite from Chilungshan, northern Taiwan:;Evidence from melt inclusions, geochronology and Hf-O isotopes of;zircons".CHEMICAL GEOLOGY 328;SI SI(2012):244-258.