月球角砾岩Bechar 003、NWA 13788和NWA 11110中岩屑溯源研究  

A study on the origin of protoliths of clasts in lunar breccia meteorites of Bechar 003,NWA 13788 and NWA 11110

作　　者：李明宝 李玉琼[3,4] 沈德汗 范焱 于雯 李世杰[1,2] LI Ming-bao;LI Yu-qiong;SHEN De-han;FAN Yan;YU Wen;LI Shi-jie(Center for Lunar and Planetary Sciences,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,China;College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 101408,China;Key Laboratory for Mechanics in Fluid Solid Coupling Systems,State key Laboratory of Nonlinear Mechanics,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China;Guangdong Aerospace Research Academy(Vanssha),Guangzhou 511458,China;State Key Laboratory of Continental Dynamics,Department of Geology,Northwest University,Xi’an 710069,China)

机构地区：[1]中国科学院地球化学研究所月球与行星科学研究中心,贵阳550081 [2]中国科学院大学地球与行星科学学院,北京101408 [3]中国科学院力学研究所,中国科学院流固耦合系统力学重点实验室,超常环境非线性力学国家重点实验室(筹),北京100190 [4]广东空天科技研究院(南沙),广州511458 [5]西北大学地质系,大陆动力学国家重点实验室,西安710069

出　　处：《矿物岩石地球化学通报》2023年第6期1300-1317,共18页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：中国科学院青年创新促进会优秀会员项目(Y2022009);广东省高水平创新研究院项目(2020B0909010003);国家自然科学基金资助(42173046)。

摘　　要：月球角砾岩是月球陨石的代表性样品,含有多来源的岩屑,是揭示月球内-外动力演化历史的重要窗口。本文对Bechar 003、NWA 13788和NWA 11110月球陨石中的岩屑开展了岩相学、矿物学及地球化学分析,通过岩相、矿物成分、全岩主微量元素等岩石地化综合分析,旨在厘清这3块样品中岩屑的类型、来源与成因机制。结果表明,3块陨石内部的斜长辉长质冲击熔融岩屑、微斑熔融角砾岩屑、以及辉长质斜长岩屑的初始物质由均是月海玄武岩与月球高地岩石的混合物,不同初始物质成分的岩屑表明月表经历了冲击事件,并且冲击事件发生在月表的不同位置,冲击事件造成月球高地岩石与月海玄武岩或非月海溅射物的混合。Lunar breccias are representative samples of lunar meteorites,containing rock clasts of multiple sources,and are served as important windows for understanding the internal and external evolution of the moon.The Bechar 003,NWA 13788,and NWA 11110 are recently discovered lunar meteorites,and they are classified as impact-melt breccias.In this study,we have conducted petrographic,mineralogical,and geochemical analyses of lithic clasts in these three lunar meteorites in order to clarify their types,sources,and formation mechanisms.Our comprehensive analyses of their characteristics of petrology,mineral compositions,and whole-rock major and trace elements indicate that the initial materials of anorthosite and gabbroimpact-melt debris,microporphyritic melt breccia debris,and gabbro-anorthosite debris in all three samples are all mixtures ofmare basalt and lunar highland rocks.Clasts with different compositions of initial materials in all three meteorites suggest that multiple impact events,occurred at different locations on the lunar surface,had resulted in the mixing of lunar highland rocks and mare basalts or non-mare sputtering materials.

关 键 词：陨石 月球陨石 月球角砾岩 冲击 

分 类 号：P691[天文地球—地质学]