Space weathering characteristics of lunar permanently shadowed regions soils:Evidence from experimental simulation  

作　　者：Zixuan Han Yang Li Chen Li Ronghua Pang Sizhe Zhao Zhuang Guo Kairui Tai Rui Li Zhenhao Hu Li Liu 

机构地区：[1]Center for Lunar and Planetary Sciences,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang,China [2]University of Chinese Academy of Sciences,Beijing,China [3]Center for Excellence in Comparative Planetology,Chinese Academy of Sciences,Hefei,China [4]State Key Laboratory of Lunar and Planetary Sciences,Macao University of Science and Technology,Macao,China [5]NWU-HKU Joint Center of Earth and Planetary Sciences,Department of Geology,Northwest University,Xi’an,China [6]International Center for Planetary Science,Chengdu University of Technology,Chengdu,China [7]Deep Space Exploration Lab,Beijing,China

出　　处：《Acta Geochimica》2025年第1期1-10,共10页地球化学学报(英文)

基　　金：support from the Youth Innovation Promotion Association,Chinese Academy of Sciences(2020395);Strategic Priority Research Program of the Chinese Academy of Sciences grant XDB 41000000(Y.L.);National Natural Science Foundation of China(Nos.42273042 and 41931077);"From 0 to 1"Original Exploration Cultivation Project,Institute of Geochemistry,Chinese Academy of Sciences(DHSZZ2023-3);Guizhou Provincial Foundation for Excellent Scholars Program(No.GCC[2023]088);Guizhou Provincial Science and Technology Projects:QKHJCZK[2023]-General 473;NSFC Young Scientist Fund(Nos.42303041 and 42403043)。

摘　　要：Permanently shadowed regions(PSRs)on the Moon are potential reservoirs for water ice,making them hot spots for future lunar exploration.The water ice in PSRs would cause distinctive changes in space weathering there,in particular reduction-oxidation processes that diff er from those in illuminated regions.To determine the characteristics of products formed during space weathering in PSRs,the lunar meteorite NWA 10203 with artifi cially added water was irradiated with a nanosecond laser to simulate a micro-meteorite bombardment of lunar soil containing water ice.The TEM results of the water-incorporated sample showed distinct amorphous rims that exhibited irregular thickness,poor stratifi cation,the appearance of bubbles,and a reduced number of npFe^(0).Additionally,EELS analysis showed the presence of ferric iron at the rim of the nanophase metallic iron particles(npFe^(0))in the amorphous rim with the involvement of water.The results suggest that water ice is another possible factor contributing to oxidation during micrometeorite bombardment on the lunar surface.In addition,it off ers a reference for a new space weathering model that incorporates water in PSRs,which could be widespread on asteroids with volatiles.

关 键 词：Space weathering Permanently shadowed regions The Moon laser irradiation Water ice 

分 类 号：P184.5[天文地球—天文学]