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
余松征 1任鑫 2刘建军 2李春来 2陈朝鹏 1张毅重 1张庆 1张旺军3
作者信息
- 1. 中国科学院国家天文台,北京,100012;中国科学院月球与深空探测重点实验室,北京,100012;中国科学院大学天文与空间科学学院,北京,100049
- 2. 中国科学院国家天文台,北京,100012;中国科学院月球与深空探测重点实验室,北京,100012
- 3. 北京空间飞行器总体设计部,北京,100094
- 折叠
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25 μm2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.
Abstract
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 25 μm2 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 31.29 μm,19.09 μm,and 9.27 μm.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Key words
Chang'E-5 samples/lunar soil polished sections/watershed algorithm/lunar soil particles引用本文复制引用
出版年
2024
NETL
NSTL
万方数据