2020
DOI: 10.26464/epp2021007
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An updated constraint on the local stratigraphy at the Chang’E-4 landing site

Abstract: The Chang'E-4 mission has been exploring the lunar farside. Two scientific targets of the rover onboard are (1) resolving the possible mineralogy related to the South Pole-Aitken basin and (2) understanding the subsurface processes at the lunar farside. Publications to date that are based on the reflectance spectra and radar data obtained by the rover have shown a persistent inconsistency about the local stratigraphy. To explain both the abnormal surface topography at the landing site and the unexpected radarg… Show more

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Cited by 5 publications
(8 citation statements)
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“…Based on the vertical placement of Stratum A and Stratum C, we could constrain the timing of the Schrödinger impact that occurred earlier than the Alder formation event dated to ∼3.50.2+0.01 $3. {5}_{-0.2}^{+0.01}$ Ga (Lu et al., 2021) or 3.8 Ga (Chang et al., 2021).…”
Section: Discussionmentioning
confidence: 99%
“…Based on the vertical placement of Stratum A and Stratum C, we could constrain the timing of the Schrödinger impact that occurred earlier than the Alder formation event dated to ∼3.50.2+0.01 $3. {5}_{-0.2}^{+0.01}$ Ga (Lu et al., 2021) or 3.8 Ga (Chang et al., 2021).…”
Section: Discussionmentioning
confidence: 99%
“…The Chinese Chang'E-4 mission landed at the bottom of Von Kármán crater at ∼3.6-3.7 Ga on the far side of the Moon (Chang et al [49], Huang et al [50], Pasckert et al [51]). The observation results from its high-frequency radar show that the material <45 m below the lunar surface are ejecta materials from the Orientale basin (Xiao et al [52]), while the shallow surface layer on the top, which is ∼12 m thick, is fine-grained lunar regolith with a loss tangent constraint of 0.005 ± 0.002 (Li et al [8]), as marked by the red dot in Figure 5.…”
Section: Relationship Between the Loss Tangent And The Moon's Surface...mentioning
confidence: 99%
“…According to basalt samples returned by the Apollo and Luna missions, the first peak of volcanic activity on the Moon was between 3.1 Ga and ∼4.3 Ga (Morota et al [60]), while the second peak of volcanic activity was ∼1.8 Ga to 2.5 Ga (Morota et al [60], Haruyama et al [61]). The mare basalt at the Chang'E-4 landing area has an age of ∼3.6-3.7 Ga (Chang et al [49], Huang et al [50], Xiao et al [52]), which probably formed during the period of the first peak of volcanic activity. The geological ages of the Chang'E-3 and Chang'E-5 landing sites are ∼2.5 Ga and 2.0 Ga (Li et al [28], Xiao et al [40]), respectively, and the mare basalt units at these sites probably formed during the second peak of volcanic activity.…”
Section: Comparison Of Estimated Loss Tangent With Apollo Datamentioning
confidence: 99%
“…We show new structures previously not considered or imaged, while summarizing or partially reinterpreting the ones already described. (Fortezzo et al, 2020) (~3.0-3.1 Ga (Lu et al, 2021;Chang et al, 2021)) or Late Imbrian (~3.5…”
Section: Introductionmentioning
confidence: 96%
“…Ga (Gou et al, 2021) or ~3.6 Ga (Ivanov, 2018) ). Further inconsistencies include the significance of the Alder crater (Imbrian (Lu et al, 2021) or Nectarian (Chang et al, 2021)) ejecta in the topmost (> 45 m) layer. While the interpretation of the early (and therefore shorter)…”
Section: Introductionmentioning
confidence: 99%