Impact-related chemical modifications of the Chang'E-5 lunar regolith
文献类型：期刊论文
| 作者 | Wu, Yunhua10; Liao, Shiyong8,9; Yan, Pan10; Xiao, Zhiyong8,10; Yin, Zongjun6,7 ; Yang, Wei5; Wang, Hao4; Tian, Hengci5; Hui, Hejiu2,3,5,8; Pan, Lili1
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| 刊名 | GEOCHIMICA ET COSMOCHIMICA ACTA
 |
| 出版日期 | 2023-12-15 |
| 卷号 | 363页码:94-113 |
| ISSN号 | 0016-7037 |
| 关键词 | Chang 'E-5 regolith Impact melt Impact glass spherules Chemical variations |
| DOI | 10.1016/j.gca.2023.10.031 |
| 通讯作者 | Hsu, Weibiao(wbxu@pmo.ac.cn) |
| 英文摘要 | Impact events on the Moon have been recognized as modifying the composition of surface materials through processes such as shock metamorphism and mixing with exotic components. Previous studies have indicated that the regolith sampled by the Chinese Chang'E-5 mission was primarily evolved from local mare basalts, likely originating from a single episode of effusive volcanism. The relatively simple and monotonic protolith of the Chang'E-5 regolith presents a unique opportunity to investigate the chemical modifications induced by impact events. In this study, we conducted detailed petrographic and mineralogical analyses on a diverse set of lunar regolith samples, including thirty-three small impact glass particles (39-227 mu m), one large agglutinate (similar to 1.6 mm), and sixteen basaltic clasts (0.1-1.6 mm). Numerical modeling was also conducted to quantitatively assess the melting behavior of basaltic clasts under different impact conditions. Our primary objective was to evaluate the chemical variations of impact glass in relation to lithic clasts. While the majority of homogeneous impact glass spherules and larger basaltic clasts (>= 1 mm) exhibit similar bulk compositions (e.g., Al2O3, CaO and FeO) to the local regolith, we recognize additional effects of impact processes, including impact comminution, impact melting and crystallization, differential volatilization, and potentially selective melting. These processes have modified the texture and geochemistry of lunar regolith components. The chemical signatures of small clasts in the Chang'E-5 regolith indicate that the fine size fractions (e.g., those with diameters of <= 300 mu m) are predominantly composed of lithic and monomineralic fragments with a substantial proportion being dominated by mesostasis. Melting of these sub-millimeter fractions may lead to the formation of impact glass with chemical compositions deviating from the average local regolith. These results have implications for understanding the compositional evolution of the Chang'E-5 regolith. Notably, our study suggests that impact glasses spherules with different major (e.g., TiO2, MgO) and minor (e.g., REEs, Zr, Th and U) element compositions could be derived from the same protolith of local mare basalts, instead of being exclusively attributed to exotic impact ejecta. In this case, small-scale local impacts may have played a crucial role in the impact history of the Chang'E-5 landing site. |
| WOS关键词 | ORDINARY CHONDRITES ; SHOCK METAMORPHISM ; MELT BRECCIAS ; HIGH-PRESSURE ; GLASSES ; ORIGIN ; APOLLO-16 ; MOON ; FRACTIONATION ; SIDEROPHILE |
| 资助项目 | China National Space Administration ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; Strategic Priority Research Program of Chinese Academy of Sciences[42241108] ; Strategic Priority Research Program of Chinese Academy of Sciences[4200353] ; Strategic Priority Research Program of Chinese Academy of Sciences[41973060] ; Strategic Priority Research Program of Chinese Academy of Sciences[42073060] ; Pre-research Project on Civil Aerospace Technologies - China National Space Administration, China Manned Space Engineering Program[2021YFA0716100] ; Key research program of Institute of Geology and Geophysics, Chinese Academy of Sciences[XDB 41000000] ; Key Research Program of Chinese Academy of Sciences[D020202] ; Key Research Program of Chinese Academy of Sciences[D020205] ; Key Research Program of Chinese Academy of Sciences[D020302] ; China Postdoctoral Science Foundation[IGGCAS-202101] ; Minor Planet Foundation of China[ZDBS-SSW-JSC007-13] ; [2020M672946] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:001129054800001 |
| 资助机构 | China National Space Administration ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Pre-research Project on Civil Aerospace Technologies - China National Space Administration, China Manned Space Engineering Program ; Key research program of Institute of Geology and Geophysics, Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; China Postdoctoral Science Foundation ; Minor Planet Foundation of China |
| 源URL | [http://ir.nigpas.ac.cn/handle/332004/42873]  |
| 专题 | 中国科学院南京地质古生物研究所 |
| 通讯作者 | Hsu, Weibiao |
| 作者单位 | 1.Sun Yat Sen Univ, Sch Earth Sci & Engn, Zhuhai 519082, Peoples R China 2.Nanjing Univ, Lunar & Planetary Sci Inst, Sch Earth Sci & Engn, Nanjing 210023, Peoples R China 3.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing 210023, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China 6.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Nanjing 210008, Peoples R China 7.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China 8.Chinese Acad Sci, Ctr Excellence Comparat Planetol, Hefei 230026, Peoples R China 9.Chinese Acad Sci, Key Lab Planetary Sci, Purple Mt Observ, Nanjing 210023, Peoples R China 10.Sun Yat Sen Univ, Sch Atmospher Sci, Planetary Environm & Astrobiol Res Lab, Zhuhai 519082, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Yunhua,Liao, Shiyong,Yan, Pan,et al. Impact-related chemical modifications of the Chang'E-5 lunar regolith[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2023,363:94-113. |
| APA | Wu, Yunhua.,Liao, Shiyong.,Yan, Pan.,Xiao, Zhiyong.,Yin, Zongjun.,...&Hsu, Weibiao.(2023).Impact-related chemical modifications of the Chang'E-5 lunar regolith.GEOCHIMICA ET COSMOCHIMICA ACTA,363,94-113. |
| MLA | Wu, Yunhua,et al."Impact-related chemical modifications of the Chang'E-5 lunar regolith".GEOCHIMICA ET COSMOCHIMICA ACTA 363(2023):94-113. |
入库方式： OAI收割
来源：南京地质古生物研究所
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