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Further Evaluation of Penglai Zircon Megacrysts as a Reference Material for (U-Th)/He Dating

文献类型：期刊论文

作者Yu, Shun4; Sun, Jingbo4; Evans, Noreen J.1; Danisik, Martin1; Wu, Lin3; Tian, Yuntao2; Shen, Ze4
刊名GEOSTANDARDS AND GEOANALYTICAL RESEARCH
出版日期2020-08-08
页码21
关键词PL1 zircon Penglai megacryst reference material (U-Th) He U-Pb age
ISSN号1639-4488
DOI10.1111/ggr.12331
英文摘要The alpha-ejection-corrected (U-Th)/He dates of the widely used reference materials (e.g., Fish Canyon Tuff zircon) can be inaccurate for several reasons (e.g., inclusions, U-Th zonation). There is a need for large, widely available, compositionally homogeneous mineral reference materials with accurately and precisely known ages. In this work, four individual Penglai zircon megacrysts are evaluated via interlaboratory (U-Th)/He dating comparison, trace element analysis, U-Pb dating and a range of characterisation methods. The (U-Th)/He ages and(206)Pb/U-238 ages are variable between Penglai megacrysts - 4.12 +/- 0.10 Ma (1s) and 4.29 +/- 0.05 Ma (1s) (PL1), 3.07 +/- 0.25 Ma (1s) and 3.95 +/- 0.05 Ma (1s) (PL2), 3.04 +/- 0.24 Ma (1s) and 3.06 +/- 0.07 Ma (1s) (PL4), and 4.49 +/- 0.07 Ma (1s) (PL5; (U-Th)/He age only), respectively. A single, cm-sized megacryst (PL1) qualifies as a new (U-Th)/He dating reference material, as it is structurally and chemically homogeneous, and yielded a highly reproducible and statistically indistinguishable (U-Th)/He age of 4.12 +/- 0.10 Ma from repeated analysis in multiple laboratories (slightly younger than the(206)Pb/U-238 age of 4.29 +/- 0.05 Ma). These results confirm Penglai zircon as a suitable reference material for (U-Th)/He dating, on the proviso that some care needs to be taken to characterise individual megacrysts for trace element zonation, and to verify (U-Th)/He (and U-Pb ages, if double dating) prior to routine use. The(206)Pb/U-238 ages and (U-Th)/He ages obtained in this work provide constraints on the timing of Penglai megacryst crystallisation and eruption, and confirm at least two eruptive episodes during the Neogene in the Leiqiong area.
WOS关键词FISH CANYON TUFF ; U-PB ZIRCON ; HE DIFFUSION ; STOPPING DISTANCES ; RADIATION-DAMAGE ; NATURAL ZIRCON ; TRACE-ELEMENT ; TH ZONATION ; GEOCHRONOLOGY ; THERMOCHRONOMETRY
资助项目National Key R & D Program of China[2017YFC0601300] ; National Natural Science Foundation of China[41503058] ; Chinese Ministry of Land and Resources[201511064-2] ; Basic Science and Technology Research Funding from the Institute of Geology, CAGS[S1901] ; Australian Research Council LIEF programme[LE150100013] ; ARC[DP160102427] ; AuScope NCRIS2 programme ; Australian Scientific Instruments Pty Ltd. ; Curtin Research Fellowship
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000556814700001
出版者WILEY
资助机构National Key R & D Program of China ; National Key R & D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Ministry of Land and Resources ; Chinese Ministry of Land and Resources ; Basic Science and Technology Research Funding from the Institute of Geology, CAGS ; Basic Science and Technology Research Funding from the Institute of Geology, CAGS ; Australian Research Council LIEF programme ; Australian Research Council LIEF programme ; ARC ; ARC ; AuScope NCRIS2 programme ; AuScope NCRIS2 programme ; Australian Scientific Instruments Pty Ltd. ; Australian Scientific Instruments Pty Ltd. ; Curtin Research Fellowship ; Curtin Research Fellowship ; National Key R & D Program of China ; National Key R & D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Ministry of Land and Resources ; Chinese Ministry of Land and Resources ; Basic Science and Technology Research Funding from the Institute of Geology, CAGS ; Basic Science and Technology Research Funding from the Institute of Geology, CAGS ; Australian Research Council LIEF programme ; Australian Research Council LIEF programme ; ARC ; ARC ; AuScope NCRIS2 programme ; AuScope NCRIS2 programme ; Australian Scientific Instruments Pty Ltd. ; Australian Scientific Instruments Pty Ltd. ; Curtin Research Fellowship ; Curtin Research Fellowship ; National Key R & D Program of China ; National Key R & D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Ministry of Land and Resources ; Chinese Ministry of Land and Resources ; Basic Science and Technology Research Funding from the Institute of Geology, CAGS ; Basic Science and Technology Research Funding from the Institute of Geology, CAGS ; Australian Research Council LIEF programme ; Australian Research Council LIEF programme ; ARC ; ARC ; AuScope NCRIS2 programme ; AuScope NCRIS2 programme ; Australian Scientific Instruments Pty Ltd. ; Australian Scientific Instruments Pty Ltd. ; Curtin Research Fellowship ; Curtin Research Fellowship ; National Key R & D Program of China ; National Key R & D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Ministry of Land and Resources ; Chinese Ministry of Land and Resources ; Basic Science and Technology Research Funding from the Institute of Geology, CAGS ; Basic Science and Technology Research Funding from the Institute of Geology, CAGS ; Australian Research Council LIEF programme ; Australian Research Council LIEF programme ; ARC ; ARC ; AuScope NCRIS2 programme ; AuScope NCRIS2 programme ; Australian Scientific Instruments Pty Ltd. ; Australian Scientific Instruments Pty Ltd. ; Curtin Research Fellowship ; Curtin Research Fellowship
源URL[http://ir.iggcas.ac.cn/handle/132A11/97601]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Yu, Shun
作者单位1.Curtin Univ, Sch Earth & Planetary Sci, John de Laeter Ctr, Perth, WA 6012, Australia
2.Sun Yat Sen Univ, Sch Earth Sci & Engn, Guangdong Prov Key Lab Geodynam & Geohazards, Guangzhou 510275, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
4.Chinese Acad Geol Sci, Inst Geol, Key Lab Deep Earth Dynam, Minist Nat Resources, Beijing 100037, Peoples R China
推荐引用方式
GB/T 7714		 Yu, Shun,Sun, Jingbo,Evans, Noreen J.,et al. Further Evaluation of Penglai Zircon Megacrysts as a Reference Material for (U-Th)/He Dating[J]. GEOSTANDARDS AND GEOANALYTICAL RESEARCH,2020:21.
APA Yu, Shun.,Sun, Jingbo.,Evans, Noreen J..,Danisik, Martin.,Wu, Lin.,...&Shen, Ze.(2020).Further Evaluation of Penglai Zircon Megacrysts as a Reference Material for (U-Th)/He Dating.GEOSTANDARDS AND GEOANALYTICAL RESEARCH,21.
MLA Yu, Shun,et al."Further Evaluation of Penglai Zircon Megacrysts as a Reference Material for (U-Th)/He Dating".GEOSTANDARDS AND GEOANALYTICAL RESEARCH (2020):21.

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来源：地质与地球物理研究所

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