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An investigation of factors affecting the reproducibility of (U-Th)/He ages of high- and low-U minerals

文献类型：期刊论文

作者Wang, Yinzhi1,2; Wang, Fei1,2,3; Wu, Lin1,2; Shi, Wenbei1,2; Yang, Liekun1,2
刊名GEOCHEMICAL JOURNAL
出版日期2022
卷号56期号:4页码:96-111
ISSN号0016-7002
关键词age reproducibility differential affecting high-to low-U minerals influence factors (U-Th)/He dating
DOI10.2343/geochemj.GJ22008
英文摘要(U-Th)/He thermochronology is an important tool for resolving the temporal evolution of thermally sensitive geological events, but significant intra-sample variation in single-grain (U-Th)/He ages is commonly observed. Zircon and apatite (U-Th)/He ages from the Jiao-Liao region, eastern China, reveal the factors that affect high- and low-U mineral He ages. Inclusions and surrounding U-Th-rich minerals have little effect on high-U mineral He ages, but do cause scatter in low-U mineral He ages. Improving sample quality is a key way to effectively improve this problem. Time and U content are the decisive factors that affect the function of Sm-147. Radionuclide Sm-147 causes variations in low-U mineral He ages, particularly for grains with U <5 ppm and ages >100 Ma. The differences in closure temperature caused by grain size can be minimized by ensuring the difference between the maximum and minimum radius is <30 mu m. Representative CL images indicated zircon (U-Th)/He ages are more susceptible to the interference of the internal heterogeneity than apatites. The error due to the alpha particle ejection correction can be neglected when using the laser ablation technique by analysing sites away from grain rims. The effects of radiation damage vary from high- to low-U minerals. Zircon ages show an inverted U-shaped pattern with increasing radiation damage. Radiation damage has a weak positive correlation with apatite He ages, probably due to its low U content. Besides, thermal histories experienced by our samples fail to significantly influence the effect of radiation damage on ages.
WOS关键词APATITE (U-TH)/HE ; HELIUM DIFFUSION ; RADIATION-DAMAGE ; MORPHOTECTONIC EVOLUTION ; HE DIFFUSION ; THERMOCHRONOMETRY ; ZIRCON ; CONSTRAINTS ; MOUNTAINS ; HISTORY
资助项目Natural Science Foundations of China[41930106] ; Natural Science Foundations of China[41673015] ; Ministry of Science and Technology of the People's Republic of China[2016YFC0600109]
WOS研究方向Geochemistry & Geophysics
语种英语
出版者GEOCHEMICAL SOC JAPAN
WOS记录号WOS:000852210900001
资助机构Natural Science Foundations of China ; Natural Science Foundations of China ; Natural Science Foundations of China ; Natural Science Foundations of China ; Ministry of Science and Technology of the People's Republic of China ; Ministry of Science and Technology of the People's Republic of China ; Ministry of Science and Technology of the People's Republic of China ; Ministry of Science and Technology of the People's Republic of China ; Natural Science Foundations of China ; Natural Science Foundations of China ; Natural Science Foundations of China ; Natural Science Foundations of China ; Ministry of Science and Technology of the People's Republic of China ; Ministry of Science and Technology of the People's Republic of China ; Ministry of Science and Technology of the People's Republic of China ; Ministry of Science and Technology of the People's Republic of China ; Natural Science Foundations of China ; Natural Science Foundations of China ; Natural Science Foundations of China ; Natural Science Foundations of China ; Ministry of Science and Technology of the People's Republic of China ; Ministry of Science and Technology of the People's Republic of China ; Ministry of Science and Technology of the People's Republic of China ; Ministry of Science and Technology of the People's Republic of China ; Natural Science Foundations of China ; Natural Science Foundations of China ; Natural Science Foundations of China ; Natural Science Foundations of China ; Ministry of Science and Technology of the People's Republic of China ; Ministry of Science and Technology of the People's Republic of China ; Ministry of Science and Technology of the People's Republic of China ; Ministry of Science and Technology of the People's Republic of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/107740]  
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Wang, Yinzhi
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100049, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Yinzhi,Wang, Fei,Wu, Lin,et al. An investigation of factors affecting the reproducibility of (U-Th)/He ages of high- and low-U minerals[J]. GEOCHEMICAL JOURNAL,2022,56(4):96-111.
APA Wang, Yinzhi,Wang, Fei,Wu, Lin,Shi, Wenbei,&Yang, Liekun.(2022).An investigation of factors affecting the reproducibility of (U-Th)/He ages of high- and low-U minerals.GEOCHEMICAL JOURNAL,56(4),96-111.
MLA Wang, Yinzhi,et al."An investigation of factors affecting the reproducibility of (U-Th)/He ages of high- and low-U minerals".GEOCHEMICAL JOURNAL 56.4(2022):96-111.

入库方式： OAI收割

来源：地质与地球物理研究所

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