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Reassessing the classification of Chang'e-5 basalts using pyroxene composition

文献类型：期刊论文

作者Tian, Heng-Ci4; Yang, Wei4; Gao, Yubing3,4; Zhou, Qing2,3; Ruan, Renhao3,4; Lin, Yangting4; Li, Xianhua1; Wu, Fuyuan
刊名LITHOS
出版日期2023-11-01
卷号456页码:7
ISSN号0024-4937
关键词Chang'e-5 mission Mare basalt Pyroxene Low-Ti Ti# ratio
DOI10.1016/j.lithos.2023.107309
英文摘要Determining the types of lunar mare basalts (i.e., very low-Ti, low-Ti, and high-Ti) is important for constraining the chemical composition of the lunar mantle and the possible dynamic processes during their formation. To date, bulk-rock analysis and inversion of Ti abundances in olivine and plagioclase indicate the Chang'e-5 (CE5) basalts as the low-Ti type. In contrast, the chemical composition of pyroxenes, which is also used to distinguish basalt types, shows an affinity to the high-Ti type as inferred from the Fe#-Ti# relationship. To investigate this discrepancy, we reassessed the classification of CE5 basalts by combining previously available pyroxene composition and the newly obtained data for CE5 basalts and a lunar basalt meteorite (NWA 4898). Our results demonstrate a consistent decrease in Cr2O3 content within pyroxenes from-0.8 wt% to nearly zero with magmatic differentiation, diverging from high-Ti basalts but resembling the Apollo low-Ti basalts. Approxi- mately half of the CE5 pyroxenes with Mg# < 45 have lower Cr2O3 content compared to both the Apollo low- and high-Ti basalts. In contrast, TiO2 content in CE5 pyroxenes is higher than in most low-Ti basalts, but similar to high-Ti basalts, especially at Mg# between 60 and 40. However, such a high Ti signature is unlikely originated from a high-Ti source but more likely evolved from a low-Ti source wherein the Ti content in the melt signifi- cantly increased before eruption. This interpretation is supported by the increase-decrease of TiO2 trend in pyroxene grains from lunar meteorites NWA 4898, NWA 4734, and LAP group. Thus, the relatively lower Cr2O3 content in pyroxenes at Mg# < 45 and the relatively higher TiO(2 )content in most pyroxenes ultimately resulted in high Ti# values, but the CE5 pyroxenes still record magmatic differentiation from a low-Ti melt.
WOS关键词MARE BASALTS ; LUNAR ; PETROGENESIS ; SAMPLE ; TI
资助项目Youth Innovation Promotion Association of the Chinese Academy of Sciences[2022064] ; Key Research Program of Chinese Academy of Sciences[ZDBS-SSW-JSC007-15] ; Key Research Program of the Institute of Geology and Geophysics, Chinese Academy of Sciences[IGGCAS-202101]
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
出版者ELSEVIER
WOS记录号WOS:001061733300001
资助机构Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the 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 ; 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 ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the 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 ; 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 ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the 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 ; 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 ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the 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 ; 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
源URL[http://ir.iggcas.ac.cn/handle/132A11/110826]  
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Tian, Heng-Ci
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, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Tian, Heng-Ci,Yang, Wei,Gao, Yubing,et al. Reassessing the classification of Chang'e-5 basalts using pyroxene composition[J]. LITHOS,2023,456:7.
APA Tian, Heng-Ci.,Yang, Wei.,Gao, Yubing.,Zhou, Qing.,Ruan, Renhao.,...&Wu, Fuyuan.(2023).Reassessing the classification of Chang'e-5 basalts using pyroxene composition.LITHOS,456,7.
MLA Tian, Heng-Ci,et al."Reassessing the classification of Chang'e-5 basalts using pyroxene composition".LITHOS 456(2023):7.

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