嫦娥五号月壤中首次发现蒸发沉积成因的蓝辉铜矿  

Vapor-deposited digenite in Chang’e-5 lunar soil

作　　者：郭壮 李琛 李阳 吴炎学 朱晨曦 文愿运 法文哲 李雄耀 刘建忠 欧阳自远 Zhuang Guo;Chen Li;Yang Li;Yanxue Wu;Chenxi Zhu;Yuanyun Wen;Wenzhe Fa;Xiongyao Li;Jianzhong Liu;Ziyuan Ouyang(Institute of Remote Sensing and Geographical Information System,School of Earth and Space Sciences,Peking University,Beijing 100871,China;Center for Lunar and Planetary Sciences,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,China;Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China;Center for Excellence in Comparative Planetology,Chinese Academy of Sciences,Hefei 230026,China;Analysis and Test Center,Guangdong University of Technology,Guangzhou 510006,China;State Key Laboratory of High Performance Ceramics and Superfine Microstructures,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China)

机构地区：[1]Institute of Remote Sensing and Geographical Information System,School of Earth and Space Sciences,Peking University,Beijing 100871,China [2]Center for Lunar and Planetary Sciences,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,China [3]Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China [4]Center for Excellence in Comparative Planetology,Chinese Academy of Sciences,Hefei 230026,China [5]Analysis and Test Center,Guangdong University of Technology,Guangzhou 510006,China [6]State Key Laboratory of High Performance Ceramics and Superfine Microstructures,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China

出　　处：《Science Bulletin》2023年第7期723-729,共7页科学通报（英文版）

基　　金：We thank the China National Space Administration for providing access to the lunar sample CE5C0200YJFM00302;This work was supported by the Strategic Priority Research Program of Chinese Academy of Sciences(XDB 41000000);the National Natural Science Foundation of China(42273042 and 41931077);the Technical Advanced Research Project of Civil Space(D020201);the Youth Innovation Promotion Association,Chinese Academy of Sciences(2020395);the Key Research Program of Frontier Sciences,Chinese Academy of Sciences(ZDBS-SSWJSC007-10 and QYZDY-SSW-DQC028);China Postdoctoral Science Foundation(2022M720216).

摘　　要：由于缺乏磁场和大气的保护,月球表面持续受到陨石和微陨石的轰击.撞击引起的气化沉积作用是月表典型的改造过程,该过程往往伴随独特矿物相的产生(如纳米金属铁以及铁硅化合物).研究团队通过对嫦娥五号月壤进行细致的扫描电子显微镜观察,在纯铁颗粒以及玻璃质表面发现了具有典型气相沉积特征的含铜组分,进一步通过透射电子显微镜以及电子能量损失谱确认了这些含铜沉积物为蓝辉铜矿这是首次在月壤中发现此类矿物.本研究提供了月表硫化物发生气化沉积的直接证据,揭示了月表撞击过程引起的气相组分迁移及其对月表物质的显著改造效应.同时,嫦娥五号月壤中蓝辉铜矿的发现进一步拓宽了人们对月表复杂矿物组成的认识.Frequent impacts on the Moon have changed the physical and chemical properties of the lunar regolith,with new materials deposited from the impact-induced vapor phase.Here,we combined nanoscale chemical and structural analysis to identify the mineral digenite(4Cu_(2)S-CuS)in Chang’e-5 lunar soil.This is the first report of digenite in a lunar sample.The surface-correlated digenite phase is undifferentiated in distribution and compositionally distinct from its hosts,suggesting that it originated from vapor-phase deposition.The presence of an Al-rich impact glass bead suggests that a thermal effect provided by impact ejecta is the main heat source for the evaporation of Cu-S components from a cupriferous troilite precursor,and the digenite condensed from these Cu-S vapors.A large pure metallic iron(Fe0)particle and high Cu content within the studied Cu-Fe-S grain suggest that this grain was most likely derived from a highly differentiated and reduced melt.

关 键 词：Vapor deposition Chang’e-5 lunar soil DIGENITE Impact ejecta 

分 类 号：V476.3[航空宇航科学与技术—飞行器设计] P184.5[天文地球—天文学]