嫦娥五号月壤样品光片中颗粒分类方法研究  

Classification of Particles in Polished Sections of Chang’E-5 Lunar Soil Samples

作　　者：余松征 任鑫[1,2] 刘建军[1,2] 李春来[1,2] 陈朝鹏 张毅重 张庆 张旺军[4] YU Songzheng;REN Xin;LIU Jianjun;LI Chunlai;CHEN Zhaopeng;ZHANG Yizhong;ZHANG Qing;ZHANG Wangjun(National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012,China;Key Laboratory of Lunar and Deep Space Exploration,Chinese Academy of Sciences,Beijing 100012,China;School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China;Beijing Institute of Spacecraft System Engineering,Beijing 100094,China)

机构地区：[1]中国科学院国家天文台,北京100012 [2]中国科学院月球与深空探测重点实验室,北京100012 [3]中国科学院大学天文与空间科学学院,北京100049 [4]北京空间飞行器总体设计部,北京100094

出　　处：《武汉大学学报（信息科学版）》2024年第12期2271-2278,共8页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金重点项目(11941002)。

摘　　要：为了方便对嫦娥五号月壤样品的岩相学和矿物学特征进行分析,部分粉末和岩屑颗粒被制作成了光片样品。利用扫描电镜获取光片的背散射电子图,从这些背散射电子图可观察到,部分颗粒由单一的矿物组成,部分颗粒由多种矿物组成。由于单个粉末光片中颗粒数量为104量级,无法使用人工的手段对其中的颗粒进行分类。因此,基于分水岭算法开发了一种月壤颗粒分类方法,根据矿物组成将这些月壤颗粒分为单矿物颗粒、双矿物颗粒、多矿物颗粒3类,统计并分析了光片背散射电子图中面积大于25μm^(2)的月壤颗粒的尺寸及种类。结果表明,矿物种类越多,颗粒的平均尺寸越小,这可能是由于不同种类颗粒在太空风化过程中破碎的速度不同而造成的;此外,这些颗粒长短径比值在3种矿物之间没有明显差异,表明颗粒的形态与矿物种类没有明显的关系。Objectives:After observing the backscattered electron images of lunar soil polished sections,some lunar soil particles are composed of a single mineral or multiple minerals.Since the number of parti-cles in one lunar soil polished section is on the order of 104,we develop a computer-based classification method of lunar soil particles.Methods:We determine the approximate range of different minerals in the particle by grayscale statistics,and then use the watershed algorithm to segment the minerals in the particle.Finally,these lunar soil particles are divided into three categories:single mineral particles,dual minerals particles,three and above minerals particles.Results:After counting all lunar soil particles with an area over 25μm^(2) in the three polished sections,the statistical results show that the percentages of single mineral,dual minerals,and three and above minerals are 15.3%,19.2%,and 65.5%,and the percentages of mass are 59.1%,31.1%,and 9.8%,respectively.The average diameters of three kinds of particles are 31.29μm,19.09μm,and 9.27μm.Conclusions:The difference in size of three types of particles might be related to the particles composed of various minerals separating easily during space weathering.

关 键 词：嫦娥五号样品 月壤光片 分水岭算法 月壤颗粒 

分 类 号：P237[天文地球—摄影测量与遥感]