Experimental constraints on the formation of oxychlorine species by UV irradiation and mechanical pulverization on the lunar surface  

作　　者：Jiamei Li Yu-Yan Sara Zhao He Cui Shuai-Yi Qu Yanhua Peng Yuhong Yang Xiongyao Li 

机构地区：[1]Research Center for Planetary Science,College of Earth and Planetary Sciences,Chengdu University of Technology,Chengdu 610059,China [2]Center for Excellence in Comparative Planetology,Chinese Academy of Sciences,Hefei 230026,China [3]College of Life Sciences,Wuchang University of Technology,Wuhan 430204,China [4]Technical Center of Qingdao Customs,Qingdao 266114,China [5]Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China [6]University of Chinese Academy of Sciences,Beijing 100049,China [7]Nanning College of Technology,Guilin 541006,China [8]Center for Lunar and Planetary Sciences,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,China

出　　处：《Acta Geochimica》2024年第4期625-637,共13页地球化学学报（英文）

基　　金：supported by the B-type Strategic Priority Program of the Chinese Academy of Sciences(XDB41000000);the National Natural Science Foundation of China(42373042);the National Key Scientifi c Instrument and Equipment Development Project(2012YQ090229);the Scientifi c Instrument Upgrading Project of Shandong Province(2012SGGZ18);the Key Research Program of the Chinese Academy of Sciences(ZDBS-SSWTLC001);the Program of the Institute of Geology&Geophysics CAS(IGGCAS-201905).

摘　　要：Perchlorate and chlorate are present in various extraterrestrial celestial bodies throughout the solar system,such as Mars,the moon,and asteroids.To date,the origin mechanisms of perchlorate and chlorate on the Martian surface have been well-established;however,relatively little attention has been cast to airless bodies.Here,we experimentally investigated the potential oxidation mechanisms of chloride to chlorate and perchlorate,such as ultraviolet irradiation under H_(2)O-and O_(2)-free conditions and mechanical pulverization processes.Individual minerals,olivine,pyroxene,ilmenite,magnetite,TiO_(2)and anhydrous ferric sulfate,and lunar regolith simulants(low Ti,CLRS-1;high-Ti,CLRS-2)and their metallic iron(Fe^( 0))bearing counterparts were examined.We found that pulverization of dry matrix material-halite mixtures,even in the presence of O_(2),does not necessarily lead to perchlorate and chlorate formation without involving water.Under photocatalytic and H_(2)O and O_(2)-free conditions,olivine and pyroxene can produce oxychlorine(ClO_(x)^(−))species,although the yields were orders of magnitude lower than those under Martian-relevant conditions.Nanophase-Fe^(0)particles in the lunar regolith and the common photocatalyst TiO_(2)can facilitate the ClO_(x)^(−)formation,but their yields were lower than those with olivine.The oxides ilmenite and magnetite did not efficiently contribute to ClO_(x)^(−)production.Our results highlight the critical role of H_(2)O in the oxidation chloride to chlorate and perchlorate,and provide essential insights into the environmental influence on the formation of oxychlorine species on different celestial bodies.

关 键 词：PERCHLORATE CHLORATE Lunar regolith Metallic Fe Airless bodies 

分 类 号：P184.5[天文地球—天文学]