A Potential (U-Th)/He Zircon Reference Material from Penglai Zircon Megacrysts

doi:10.1111/ggr.12168

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	A Potential (U-Th)/He Zircon Reference Material from Penglai Zircon Megacrysts
	Li, Youjuan 1; Zheng, Dewen 1; Wu, Ying 1; Wang, Ying 1; He, Huaiyu 2; Pang, Jianzhang 1; Wang, Yizhou 1; Yu, Jingxing 1
刊名	GEOSTANDARDS AND GEOANALYTICAL RESEARCH
	2017-09-01
卷号	41 期号:3 页码:359-365
关键词	Penglai zircon megacrysts reference material (U-Th) He age
ISSN号	1639-4488
DOI	10.1111/ggr.12168
文献子类	Article
英文摘要	In this study (U-Th)/He dating of the Penglai zircons, which occur as abundant megacrysts in Neogene alkaline basalts in northern Hainan Province, south-eastern China, was undertaken. A weighted mean age of 4.06 +/- 0.35Ma (2s) with a mean square weighted deviation (MSWD) of 1.79 was obtained from eighteen fragments of four zircon megacrysts using single-crystal laser fusion He determinations and the U-Th isotope dilution (ID) method. The (U-Th)/He ages are consistent, homogeneous and systematically slightly younger than the preferred Pb-206/U-238 age of 4.4 +/- 0.1Ma (95% confidence interval) determined by ID-TIMS and subsequently published U-Pb results. The U-Pb isotopic system in zircon has a high closure temperature of similar to 900 degrees C, and the preferred U-Pb age may record both the time since eruption and the zircon residence time in the magma chamber. In contrast, the closure temperature of the zircon (U-Th)/He system is similar to 190 degrees C and the zircon megacrysts were brought quickly to the surface by the host basaltic magma. Thus, the (U-Th)/He age represents the timing of the eruption. Based on the unlimited quantity, large grain size, mostly weak broad zoning, rapid cooling and homogenous (U-Th)/He ages, we consider the Penglai zircons suitable for use as a reference material in (U-Th)/He isotope geochronology.
WOS关键词	NORTHERN TIBETAN PLATEAU ; MAGMA RESIDENCE TIMES ; DETRITAL ZIRCONS ; CENOZOIC BASALTS ; SIERRA-NEVADA ; THERMOCHRONOMETRY ; PB ; CALIFORNIA ; APATITE ; EROSION
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	WILEY
WOS记录号	WOS:000407274900003
资助机构	National Natural Science Foundation of China(41688103 ; Fundamental Research Funds in the Institute of Geology, China Earthquake Administration(IGCEA1514) ; 41272215 ; 41425013) ; National Natural Science Foundation of China(41688103 ; Fundamental Research Funds in the Institute of Geology, China Earthquake Administration(IGCEA1514) ; 41272215 ; 41425013) ; National Natural Science Foundation of China(41688103 ; Fundamental Research Funds in the Institute of Geology, China Earthquake Administration(IGCEA1514) ; 41272215 ; 41425013) ; National Natural Science Foundation of China(41688103 ; Fundamental Research Funds in the Institute of Geology, China Earthquake Administration(IGCEA1514) ; 41272215 ; 41425013)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/61825]
专题	地质与地球物理研究所_地球深部结构与过程研究室
通讯作者	Li, Youjuan
作者单位	1.China Earthquake Adm, Inst Geol, State Key Lab Earthquake Dynam, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earths Deep Interior, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Li, Youjuan,Zheng, Dewen,Wu, Ying,et al. A Potential (U-Th)/He Zircon Reference Material from Penglai Zircon Megacrysts[J]. GEOSTANDARDS AND GEOANALYTICAL RESEARCH,2017,41(3):359-365.
APA	Li, Youjuan.,Zheng, Dewen.,Wu, Ying.,Wang, Ying.,He, Huaiyu.,...&Yu, Jingxing.(2017).A Potential (U-Th)/He Zircon Reference Material from Penglai Zircon Megacrysts.GEOSTANDARDS AND GEOANALYTICAL RESEARCH,41(3),359-365.
MLA	Li, Youjuan,et al."A Potential (U-Th)/He Zircon Reference Material from Penglai Zircon Megacrysts".GEOSTANDARDS AND GEOANALYTICAL RESEARCH 41.3(2017):359-365.