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Chinese scientists have found that there is a high content of water in the minerals of the Chang'e 5 lunar soil

Posting time:2023-03-26 08:22:21

Chinese scientists have found that there is a high content of water in the minerals of the Chang'e 5 lunar soil

IT House news on September 12, due to the lack of direct sample analysis evidence, the cause and distribution of lunar surface water has been controversial. According to CCTV reports, the research team of the Institute of Geochemistry of the Chinese Academy of Sciences has carried out research on the lunar soil samples brought back by our Chang'e 5. Through infrared spectroscopy and nano-ion probe analysis, it was found that there is a large amount of solar wind-derived water in the mineral surface, and the solar wind was estimated. The proton injection contributed at least 170ppm of water to the Chang'e-5 lunar soil. Combined with TEM and EDS analysis, it revealed that the formation and preservation of solar wind-derived water are mainly affected by the exposure time, crystal structure and composition of minerals. The study confirms that lunar surface minerals are important "reservoirs" of water, and provides an important reference for the distribution of water in the mid-latitudes of the lunar surface. IT House learned that this achievement was recently published in the international academic journal "Nature Communications" with the article number 5336 (2022). Abstract: The formation and distribution of water in the lunar surface remains unclear. Here, we demonstrate the prominence of water (OH/H2O) attributed to solar wind implantation on the uppermost surface of the olivine, plagioclase, and pyroxene grains of the Chang'e-5 sample. The results of spectroscopic and microstructural analysis showed that solar wind-implanted water was influenced by exposure time, crystal structure, and mineral composition. We estimate that the lunar soil in the Chang'e-5 region has a water content of at least 170 ppm, which is consistent with the water content reported by the lunar mineralogical mapper and the Chang'e-5 lander. Through comparison with remote sensing data and through the analysis of lunar soil maturity, the water volume of Chang'e-5 provides a reference for the distribution of surface water in the lunar mid-latitudes. We conclude that minerals in lunar soil are important reservoirs, and the formation and retention of water originating from the solar wind occurs on airless bodies. According to reports, the Chang'e 5 (CE5) mission retrieved 1.731 kilograms of lunar surface material from the Procellarum Basin (43.06°N, 51.92°W) in the northeastern part of the moon, which has a higher latitude than all previous sampling missions explored. . Radiometric dating using lead-lead (Pb-Pb) isotope isochron techniques showed the returned lunar sample to be 20.3 ± 4 million years old, which is much younger than the lunar samples collected by the Apollo and lunar missions. Lunar soil contains water from three sources: the Moon's interior, the solar wind, and water from comets and meteoroids. Considering that such samples are exposed on the lunar surface, lunar particles are expected to record the information of solar wind implantation and form solar wind-derived water, which is expected to provide a reference for the preservation and distribution of water on the lunar surface. "New achievements of Chang'e 5: the existence of primary water from the interior of the moon in the lunar soil"

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