The distribution range, time-varying characteristics, and sources of lunar water are still controversial. Here we show the Chang'E-5 in-situ spectral observations of lunar water under Earth's magnetosphere shielding and relatively high temperatures. Our results show the hydroxyl contents of lunar soils in Chang'E-5 landing site are with a mean value of 28.5 ppm, which is on the weak end of lunar hydration features. This is consistent with the predictions from remote sensing and ground-based telescopic data. Laboratory analysis of the Chang'E-5 returned samples also provide critical clues to the possible sources of these hydroxyl contents. Much less agglutinate glass contents suggest a weak contribution of solar wind implantation. Besides, the apatite present in the samples can provide hydroxyl contents in the range of 0 to 179 +/- 13 ppm, which shows compelling evidence that, the hydroxyl-containing apatite may be an important source for the excess hydroxyl observed at this young mare region.
Laboratory analysis of returned Chang'E-5 samples from the lunar surface show their hydroxyl contents to be on the weak end of lunar hydration features.
NATURE COMMUNICATIONS, Volume 13, Issue 1, Article Number 3119, DOI 10.1038/s41467-022-30807-5, Published JUN 14 2022
Liu, Jianjun; Liu, Bin; Ren, Xin; Li, Chunlai; Shu, Rong; Guo, Lin; Yu, Songzheng; Zhou, Qin; Liu, Dawei; Zeng, Xingguo; Gao, Xingye; Zhang, Guangliang; Yan, Wei; Zhang, Hongbo; Jia, Lihui; Jin, Shifeng; Xu, Chunhua; Deng, Xiangjin; Xie, Jianfeng; Yang, Jianfeng; Huang, Changning; Zuo, Wei; Su, Yan; Wen, Weibin; Ouyang, Ziyuan
-Chinese Acad Sci, Natl Astron Observ, Key Lab Lunar & Deep Space Explorat, Beijing 100101, Peoples R China
-Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Chinese Acad Sci, Shanghai Inst Tech Phys, Key Lab Space Act Optoelect Technol, Shanghai 200083, Peoples R China
|Author(s) from IGCAS || Ouyang, Ziyuan |
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