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Geochemistry of impact glasses in the Chang'e-5 regolith: Constraints on impact melting and the petrogenesis of local basalt

文献类型：期刊论文

作者Yang, Wei1; Chen, Yi6; Wang, Hao6; Tian, Heng-Ci1; Hui, Hejiu4,5; Xiao, Zhiyong3; Wu, Shi-Tou6; Zhang, Di6; Zhou, Qin2; Ma, Hong-Xia6
刊名GEOCHIMICA ET COSMOCHIMICA ACTA
出版日期2022-10-15
卷号335页码:183-196
ISSN号0016-7037
关键词Lunar impact glass Chang'e-5 regolith Differential vaporization Incompatible trace element KREEP Extensive fractional crystallization
DOI10.1016/j.gca.2022.08.030
英文摘要Lunar impact glasses can provide important information on the bulk compositions of their sources and the impact history of the Moon. Here, we report the chemical composition of fifty-four clean glass spherules containing neither relict clasts nor crystals from the Chang'e-5 (CE5) regolith. They can be subdi-vided into three compositional groups: (1) mid-Ti basaltic (TiO2 = 4.1 -6.5 wt%), (2) low-Ti basaltic (TiO2 = 1.3 -3.9 wt%), and (3) high-Al (Al2O3 > 15 wt%). Fifty-one glasses (-94 %) are mid-Ti basaltic, which form a loose compositional cluster for most major and trace elements. These glasses exhibit con-siderable variations in SiO2 (35.3 -45.3 wt%). Their TiO2, Al2O3 , MgO and CaO show negative correlations with SiO2, while the Na2O, K2O and P(2)O(5 )positively correlate with SiO2, also yielding a positive correlation between the CIPW normative plagioclase and olivine. These variations likely result from differential vaporization of SiO2, strongly suggesting an impact origin of these glasses. Their major and trace element compositions are averagely similar to the bulk-rock, in turn indicating that they were formed from the local regolith. The remaining three glasses, including two low-Ti basaltic and one high-Al variety, exhibit distinct major and trace elements from the regolith, indicating an exotic source. In addition, the mid-Ti basaltic glasses provide another approach for estimating the average composition of the CE5 basalt other than directly measuring the small basalt fragments assuming that the exotic materials in the CE5 regolith were limited. This estimation reveals critical trace element characteristics of the CE5 basalt, e.g., it has higher La/Yb (3.71), Sm/Yb (1.76), Sr/Yb (31.6), and (Eu/Eu*)(N) (0.45) than KREEP, indicating that CE5 basalt must derive from a non-KREEP source. Chemical modeling indicates that the contribution of KREEP-rich materials in the mantle source should be less than 0.3 %. The trace element characteristics of the CE5 basalt can be reproduced by extensive (80 %) fractional crystallization after low-degree (2 %) melting. We propose that this fractional crystallization process might occur at depth, implying vast igneous underplating (7,250 -11,750 km(3)) beneath the CE5 landing area. This study also suggests that the high Th concentration (5.43 ppm) is an inherent property of the CE5 basalt resulting from extensive fractional crystallization. Thus, high Th detected by remote sensing may not be associated directly with a KREEP component but rather with highly fractionated basalts. (C) 2022 The Authors. Published by Elsevier Ltd.
WOS关键词MARE BASALTS ; PARTITION-COEFFICIENTS ; LAPAZ ICEFIELD ; LUNAR ; MOON ; CHEMISTRY ; PETROLOGY ; PROVENANCE ; OLIVINE ; GARNET
资助项目Strategic Priority Research Program of Chinese Academy of Sciences[XDB 41000000] ; Key Research Program of Chinese Academy of Sciences[ZDBS-SSW-JSC007-15] ; CAS Interdisciplinary Innovation Team ; key research program of the Institute of Geology and Geophysics, Chinese Academy of Sciences[IGGCAS-202101] ; pre-research project on Civil Aerospace Technologies of China National Space Administration[D020203]
WOS研究方向Geochemistry & Geophysics
语种英语
出版者PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号WOS:000862791900001
资助机构Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; key research program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; key research program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; key research program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; key research program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; pre-research project on Civil Aerospace Technologies of China National Space Administration ; pre-research project on Civil Aerospace Technologies of China National Space Administration ; pre-research project on Civil Aerospace Technologies of China National Space Administration ; pre-research project on Civil Aerospace Technologies of China National Space Administration ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; key research program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; key research program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; key research program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; key research program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; pre-research project on Civil Aerospace Technologies of China National Space Administration ; pre-research project on Civil Aerospace Technologies of China National Space Administration ; pre-research project on Civil Aerospace Technologies of China National Space Administration ; pre-research project on Civil Aerospace Technologies of China National Space Administration ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; key research program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; key research program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; key research program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; key research program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; pre-research project on Civil Aerospace Technologies of China National Space Administration ; pre-research project on Civil Aerospace Technologies of China National Space Administration ; pre-research project on Civil Aerospace Technologies of China National Space Administration ; pre-research project on Civil Aerospace Technologies of China National Space Administration ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; key research program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; key research program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; key research program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; key research program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; pre-research project on Civil Aerospace Technologies of China National Space Administration ; pre-research project on Civil Aerospace Technologies of China National Space Administration ; pre-research project on Civil Aerospace Technologies of China National Space Administration ; pre-research project on Civil Aerospace Technologies of China National Space Administration
源URL[http://ir.iggcas.ac.cn/handle/132A11/107778]  
专题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
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Yang, Wei
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, Natl Astron Observ, Beijing 100012, Peoples R China
3.Sun Yat Sen Univ, Sch Atmospher Sci, Planetary Environm & Astrobiol Res Lab, Zhuhai 519080, Peoples R China
4.Nanjing Univ, Lunar & Planetary Sci Inst, Sch Earth Sci & Engn, Nanjing 210023, Peoples R China
5.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing 210023, Peoples R China
6.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Yang, Wei,Chen, Yi,Wang, Hao,et al. Geochemistry of impact glasses in the Chang'e-5 regolith: Constraints on impact melting and the petrogenesis of local basalt[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2022,335:183-196.
APA Yang, Wei.,Chen, Yi.,Wang, Hao.,Tian, Heng-Ci.,Hui, Hejiu.,...&Wu, Fu -Yuan.(2022).Geochemistry of impact glasses in the Chang'e-5 regolith: Constraints on impact melting and the petrogenesis of local basalt.GEOCHIMICA ET COSMOCHIMICA ACTA,335,183-196.
MLA Yang, Wei,et al."Geochemistry of impact glasses in the Chang'e-5 regolith: Constraints on impact melting and the petrogenesis of local basalt".GEOCHIMICA ET COSMOCHIMICA ACTA 335(2022):183-196.

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来源：地质与地球物理研究所

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