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Layering Structures in the Porous Material Beneath the Chang'e-3 Landing Site
Ding, Chunyu1,2; Li, Chunlai2; Xiao, Zhiyong1,3,4; Su, Yan2; Xing, Shuguo2; Wang, Yichen5; Feng, Jianqing2; Dai, Shun2; Xiao, Yuan2; Yao, Meijuan1
2020-10-01
Source PublicationEARTH AND SPACE SCIENCE
Volume7Issue:10Pages:19
AbstractThe lunar penetrating radar (LPR) onboard the Chinese Chang'e-3 (CE-3) mission obtained high-resolution profile data for the continuous ejecta deposits of the Ziwei crater. Geological background suggests that the continuous ejecta deposits contain few large boulders, and the ejecta deposits were largely originated from the pre-impact regolith. Using the top similar to 50 ns of radar data, we estimate the bulk density and porosity for the ejecta deposits based on hyperbolic echo patterns in the radargram that are caused by subsurface boulders. The physical properties are close to those of typical lunar regolith. Numerous subparallel and discontinuous short layers are visible in the radargram of the continuous ejecta deposits. The dielectric coefficients of the layering structures are estimated, and their permittivity is slightly larger than that of typical lunar regolith and less than that of basaltic rocks. Cratering physics together with the geological context of this area suggest that the layering structures are most likely ground gravels and/or melt-welded breccias that were sheared due to the horizontal momentum of the impact ejecta. This interpretation is indicative of the origin of the enigmatic layering structures in regolith core samples returned by the Apollo and Luna missions. The results also highlight the importance of ejecta emplacement in shaping the structure of lunar regolith. Plain Language Summary Large discrepancies existed in previous geological interpretations using the Chang'e-3 high-frequency LPR data. A comprehensive review of previous studies that used the Chang'e-3 radar data noticed that most previous studies agree that the top similar to 50 ns of the radargram is restricted within the continuous ejecta deposits of the Ziwei crater. Analyses for the stratigraphy of the landing site suggested that the continuous ejecta deposits were largely composed by pre-impact regolith. Using the high-frequency LPR data, we reconstructed the depth profiles of physical parameters (i.e., relative permittivity, bulk density, and porosity) for the continuous ejecta deposits of the Ziwei crater, which are similar with those of typical lunar regolith. Many subparallel and discontinuous layers are observed in the radargram, which were not deciphered before. We carried out numerical simulations to study the nature of the layering features. Results suggest that these structures have a permittivity slightly larger than that of typical lunar regolith. Geological context of the landing site suggested that the layering structures are likely shear bands within the continuous ejecta deposits, and they may be composed by ground rock fragments and/or melt-welded breccia, which were laterally deformed due to the horizontal momentum of the ejecta deposits.
Funding OrganizationB-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; pre-research Project on Civil Aerospace Technologies - Chinese National Space Administration ; pre-research Project on Civil Aerospace Technologies - Chinese National Space Administration ; Opening Fund of the Key Laboratory of Lunar and Deep Space Exploration, CAS ; Opening Fund of the Key Laboratory of Lunar and Deep Space Exploration, CAS ; Science and Technology Development Fund (FDCT) of Macau ; Science and Technology Development Fund (FDCT) of Macau ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; pre-research Project on Civil Aerospace Technologies - Chinese National Space Administration ; pre-research Project on Civil Aerospace Technologies - Chinese National Space Administration ; Opening Fund of the Key Laboratory of Lunar and Deep Space Exploration, CAS ; Opening Fund of the Key Laboratory of Lunar and Deep Space Exploration, CAS ; Science and Technology Development Fund (FDCT) of Macau ; Science and Technology Development Fund (FDCT) of Macau ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; pre-research Project on Civil Aerospace Technologies - Chinese National Space Administration ; pre-research Project on Civil Aerospace Technologies - Chinese National Space Administration ; Opening Fund of the Key Laboratory of Lunar and Deep Space Exploration, CAS ; Opening Fund of the Key Laboratory of Lunar and Deep Space Exploration, CAS ; Science and Technology Development Fund (FDCT) of Macau ; Science and Technology Development Fund (FDCT) of Macau ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; pre-research Project on Civil Aerospace Technologies - Chinese National Space Administration ; pre-research Project on Civil Aerospace Technologies - Chinese National Space Administration ; Opening Fund of the Key Laboratory of Lunar and Deep Space Exploration, CAS ; Opening Fund of the Key Laboratory of Lunar and Deep Space Exploration, CAS ; Science and Technology Development Fund (FDCT) of Macau ; Science and Technology Development Fund (FDCT) of Macau
DOI10.1029/2019EA000862
WOS KeywordSIZE-FREQUENCY DISTRIBUTION ; PENETRATING RADAR ONBOARD ; LUNAR REGOLITH ; DIELECTRIC-PROPERTIES ; SUBSURFACE ; THICKNESS ; CONSTRAINTS ; MECHANISMS ; SIMULATION ; ROVER
Language英语
Funding ProjectB-type Strategic Priority Program of the Chinese Academy of Sciences[XDB41000000] ; National Natural Science Foundation of China[42004099] ; pre-research Project on Civil Aerospace Technologies - Chinese National Space Administration[D020201] ; pre-research Project on Civil Aerospace Technologies - Chinese National Space Administration[D020202] ; Opening Fund of the Key Laboratory of Lunar and Deep Space Exploration, CAS[LDSE201908] ; Science and Technology Development Fund (FDCT) of Macau[0042/2018/A2]
Funding OrganizationB-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; pre-research Project on Civil Aerospace Technologies - Chinese National Space Administration ; pre-research Project on Civil Aerospace Technologies - Chinese National Space Administration ; Opening Fund of the Key Laboratory of Lunar and Deep Space Exploration, CAS ; Opening Fund of the Key Laboratory of Lunar and Deep Space Exploration, CAS ; Science and Technology Development Fund (FDCT) of Macau ; Science and Technology Development Fund (FDCT) of Macau ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; pre-research Project on Civil Aerospace Technologies - Chinese National Space Administration ; pre-research Project on Civil Aerospace Technologies - Chinese National Space Administration ; Opening Fund of the Key Laboratory of Lunar and Deep Space Exploration, CAS ; Opening Fund of the Key Laboratory of Lunar and Deep Space Exploration, CAS ; Science and Technology Development Fund (FDCT) of Macau ; Science and Technology Development Fund (FDCT) of Macau ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; pre-research Project on Civil Aerospace Technologies - Chinese National Space Administration ; pre-research Project on Civil Aerospace Technologies - Chinese National Space Administration ; Opening Fund of the Key Laboratory of Lunar and Deep Space Exploration, CAS ; Opening Fund of the Key Laboratory of Lunar and Deep Space Exploration, CAS ; Science and Technology Development Fund (FDCT) of Macau ; Science and Technology Development Fund (FDCT) of Macau ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; pre-research Project on Civil Aerospace Technologies - Chinese National Space Administration ; pre-research Project on Civil Aerospace Technologies - Chinese National Space Administration ; Opening Fund of the Key Laboratory of Lunar and Deep Space Exploration, CAS ; Opening Fund of the Key Laboratory of Lunar and Deep Space Exploration, CAS ; Science and Technology Development Fund (FDCT) of Macau ; Science and Technology Development Fund (FDCT) of Macau
WOS Research AreaAstronomy & Astrophysics ; Geology
WOS SubjectAstronomy & Astrophysics ; Geosciences, Multidisciplinary
WOS IDWOS:000586332600009
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/81092
Collection中国科学院国家天文台
Corresponding AuthorLi, Chunlai
Affiliation1.Sun Yat Sen Univ, Sch Atmospher Sci, Planetary Environm & Astrobiol Res Lab, Zhuhai, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Key Lab Lunar & Deep Space Explorat, Beijing, Peoples R China
3.Chinese Acad Sci, Ctr Excellence Comparat Planetol, Hefei, Peoples R China
4.Macau Univ Sci & Technol, Space Sci Inst, State Key Lab Lunar & Planetary Sci, Macau, Peoples R China
5.China Univ Geosci Wuhan, Sch Earth Sci, Planetary Sci Inst, Wuhan, Peoples R China
Recommended Citation
GB/T 7714
Ding, Chunyu,Li, Chunlai,Xiao, Zhiyong,et al. Layering Structures in the Porous Material Beneath the Chang'e-3 Landing Site[J]. EARTH AND SPACE SCIENCE,2020,7(10):19.
APA Ding, Chunyu.,Li, Chunlai.,Xiao, Zhiyong.,Su, Yan.,Xing, Shuguo.,...&Yao, Meijuan.(2020).Layering Structures in the Porous Material Beneath the Chang'e-3 Landing Site.EARTH AND SPACE SCIENCE,7(10),19.
MLA Ding, Chunyu,et al."Layering Structures in the Porous Material Beneath the Chang'e-3 Landing Site".EARTH AND SPACE SCIENCE 7.10(2020):19.
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