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  2. 地质与地球物理研究所
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  4. 岩石圈演化国家重点实验室
Nanoscale evidence of zircon-coffinite-xenotime solid solution observed by atom probe tomography

文献类型：期刊论文

作者Zhao, Wenhao2,3,4; Wang, Bi-Wen2,4; Gu, Li-Xin1; Tang, Xu1; Liu, Yu2; Awais, Muhammad2; Liu, Xiao-Chi2; Li, Xian-Hua2,4; Hu, Rong5,6; Li, Qiu-Li2,4
刊名CHEMICAL GEOLOGY
出版日期2023-11-05
卷号638页码:11
关键词Zircon Atom probe tomography SIMS U -Pb dating High U effect Solid solution
ISSN号0009-2541
DOI10.1016/j.chemgeo.2023.121697
英文摘要Ion probe zircon U-Pb dating has been widely used in earth and planetary sciences research. Previous studies found that ion probes have problems in the U-Pb dating of zircon with high U content. When the U content of zircon reaches a high threshold, the apparent age of U-Pb will become scattered and mostly older, which is called the "high U effect". Based on micron-scale observations, predecessors have proposed that the spontaneous alpha decay of high content of radioactive element U and its daughter nuclear recoil will damage the zircon lattice, resulting in an increased yield of Pb+ in SIMS analyses and therefore an older Pb-206/U-238 age. However, there are also studies showing that zircons that have not been damaged also show a "high U effect". In this contribution, scanning electron microscopy, ion probe and atom probe tomography research were carried out on high U content zircon grains (3.0 +/- 0.1 Ma) in a highly fractionated leucogranites from the Himalayas to study the microcosmic occurrence state of zirconium constituent elements. Results show that these zircon grains have extremely high U contents ranging from 4271 to 95,176 mu g/g. The distribution of U, P and Y in zircon is inhomogeneous, with enrichment features in local nanoscale regions. Zr constituent elements mainly exist in two states: (1) lamellar enrichment region, which corresponds to the compositional oscillation ring of zircon. The lamellar high U region is nearly parallel distributed. Its composition is in the transition between zircon, coffinite (USiO4) and xenotime; (2) The agglomerated high U region, which appears as isolated particles in zircon with a composition close to coffinite. The composition of the observed highest U region is Zr2.7Si12.2O61.8U19.8P1.4Y1.2Yb0.6Hf0.3, and the particle size is similar to 8 nm. Nanoscale coffinites and xenotimes in high U zircons result in obvious differences between the matrix with the ion probe zircon standard reference materials, which resulted in the "high U effect".
WOS关键词U-PB ; BALTORO GRANITE ; AGE ; GEOCHRONOLOGY ; SIMS ; GEOCHEMISTRY ; KARAKORAM ; EVOLUTION ; COMPLEX ; ORIGIN
资助项目National Natural Science Foundation of China[42225301] ; National Natural Science Foundation of China[42103023] ; Key Research Program of IGGCAS from the Institute of Geology and Geophysics, Chinese Academy of Sciences[IGGCAS-201901] ; Key Research Program of IGGCAS from the Institute of Geology and Geophysics, Chinese Academy of Sciences[IGGCAS-202101]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:001082968100001
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of IGGCAS from the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Key Research Program of IGGCAS from the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Key Research Program of IGGCAS from the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Key Research Program of IGGCAS from the Institute of Geology and Geophysics, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of IGGCAS from the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Key Research Program of IGGCAS from the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Key Research Program of IGGCAS from the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Key Research Program of IGGCAS from the Institute of Geology and Geophysics, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of IGGCAS from the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Key Research Program of IGGCAS from the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Key Research Program of IGGCAS from the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Key Research Program of IGGCAS from the Institute of Geology and Geophysics, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of IGGCAS from the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Key Research Program of IGGCAS from the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Key Research Program of IGGCAS from the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Key Research Program of IGGCAS from the Institute of Geology and Geophysics, Chinese Academy of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/110756]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Hu, Rong; Li, Qiu-Li
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
3.Brown Univ, Dept Earth Environm & Planetary Sci, Providence, RI 02912 USA
4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
5.Adv Mat Res Inst, Anal & Characterizat Platform, Suzhou 215133, Peoples R China
6.Nanjing Tech Univ, Key Lab Light Weight Mat, Nanjing 210009, Peoples R China
推荐引用方式
GB/T 7714		 Zhao, Wenhao,Wang, Bi-Wen,Gu, Li-Xin,et al. Nanoscale evidence of zircon-coffinite-xenotime solid solution observed by atom probe tomography[J]. CHEMICAL GEOLOGY,2023,638:11.
APA Zhao, Wenhao.,Wang, Bi-Wen.,Gu, Li-Xin.,Tang, Xu.,Liu, Yu.,...&Li, Qiu-Li.(2023).Nanoscale evidence of zircon-coffinite-xenotime solid solution observed by atom probe tomography.CHEMICAL GEOLOGY,638,11.
MLA Zhao, Wenhao,et al."Nanoscale evidence of zircon-coffinite-xenotime solid solution observed by atom probe tomography".CHEMICAL GEOLOGY 638(2023):11.

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来源：地质与地球物理研究所

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