Zhou Chuanjiao, Tang Hong, Li Xiongyao, Zeng Xiaojia, Mo Bing, Yu Wen, Wu Yanxue, Zeng Xiandi, Liu Jianzhong, Wen Yuanyun
Center for Lunar and Planetary Sciences, Institute of Geochemistry, Chinese Academy of Sciences, 550081, Guiyang, China.
College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, 100049, Beijing, China.
Nat Commun. 2022 Sep 10;13(1):5336. doi: 10.1038/s41467-022-33095-1.
The formation and distribution of lunar surficial water remains ambiguous. Here, we show the prominence of water (OH/HO) attributed to solar wind implantation on the uppermost surface of olivine, plagioclase, and pyroxene grains from Chang'E-5 samples. The results of spectral and microstructural analyses indicate that solar wind-derived water is affected by exposure time, crystal structure, and mineral composition. Our estimate of a minimum of 170 ppm water content in lunar soils in the Chang'E-5 region is consistent with that reported by the Moon Minerology Mapper and Chang'E-5 lander. By comparing with remote sensing data and through lunar soil maturity analysis, the amount of water in Chang'E-5 provides a reference for the distribution of surficial water in middle latitude of the Moon. We conclude that minerals in lunar soils are important reservoirs of water, and formation and retention of water originating from solar wind occurs on airless bodies.
月球表面水的形成和分布仍然不明确。在这里，我们展示了来自嫦娥五号样本的橄榄石、斜长石和辉石颗粒最上层表面上归因于太阳风注入的水（OH/HO）的显著特征。光谱和微观结构分析结果表明，太阳风衍生的水受到暴露时间、晶体结构和矿物成分的影响。我们对嫦娥五号区域月球土壤中最低170 ppm水含量的估计与月球矿物绘图仪和嫦娥五号着陆器报告的结果一致。通过与遥感数据比较并进行月球土壤成熟度分析，嫦娥五号的水含量为月球中纬度地区表面水的分布提供了参考。我们得出结论，月球土壤中的矿物是重要的水储存库，并且源自太阳风的水的形成和保留发生在无大气天体上。
