Micro-CT成像技术在NWA 11474月球陨石结构研究的应用  

Three-dimensional Structure Study of NWA 11474 Lunar Meteorite Based on Micro-CT Imaging Technology

作　　者：杨丰利 高焕香 蒋慧略 马永杰 刘勇 Yang Fengli;Gao Huanxiang;Jiang Huilue;Ma Yongjie;Liu Yong(Shandong Provincial Key Laboratory of Ocean Environment Monitoring Technology,Institute of Oceangraphic Instrumentation,Qilu University of Technology(Shandong Academy of Sciences),Qingdao Shandong 266100;Shandong Technological Center of Oceanographic Instrument,Qingdao Shandong 266100;Thermo Fisher Scientific(China)Co.,Ltd.Shanghai,200120)

机构地区：[1]齐鲁工业大学(山东省科学院)海洋仪器仪表研究所山东省海洋环境监测技术重点实验室,山东青岛266100 [2]山东省海洋仪器仪表科技中心有限公司,山东青岛266100 [3]赛默飞世尔科技(中国)有限公司,上海200120

出　　处：《中国仪器仪表》2021年第10期26-30,共5页China Instrumentation

基　　金：山东省重点研发计划(2019GGX105007);山东省科学院国际科技合作(2019GHPY02)。

摘　　要：月球陨石是研究月球组成、矿物学、天体演化等领域的主要对象之一。为了研究发现于非洲的NWA 11474月球陨石内部结构和组分,本文基于Micro-CT扫描技术对该月球陨石样品内部进行了三维结构成像,得到陨石三维空间结构图像。由图像可见陨石样品中大孔隙、小孔隙和裂缝均比较丰富,大孔隙分布相对集中,矿物颗粒分散且亮度不均,矿物组成复杂多样,利用三维图像处理软件Per Geos采用改进的分水岭算法对图像进行分割处理,进一步对图像中的孔隙、矿物和基质进行量化分析后,得出陨石中孔隙、矿物和基质体积含量百分比分别为2.5%、11.1%和86.4%。本文研究结果表明,CT成像是陨石研究的有效手段,该方法可以应用到传统的陨石学研究领域,有助于挑选陨石中特殊的岩屑或截面,服务于后续的定量研究,对于月球天体组成、岩石学及演化等研究具有重要的推动作用。The study of lunar meteorites is one of the main parts of lunar composition, mineralogy, and celestial evolution. In order to analyze the internal structure and composition of the NWA 11474 lunar meteorite found in Africa, The Micro-CT scanning technology was applied on the lunar meteorite to abtain the three-dimensional image. It can be seen from the image that the macropores, micopores and cracks in the meteorite sample are quite rich, and the macropores are relatively concentrated. The mineral composition is quite complex and diverse, in the meantime mineral particles are scattered and uneven.Based on the watershed algorithm, the three-dimensional image processing software Per Geos was used to obtain the image segmentation. Then the pores, minerals and matrix were further analyzed quantitatively, and the volume percentages of pores, minerals and matrix were 2.5%, 11.1% and 86.4% respectively. The research in this article shows that the Micro-CT scaning technology is an effective method for meteorite research, which plays an important role in the study of lunar composition, petrology and evolution.

关 键 词：微米CT 月球陨石 图像分割 孔隙 矿物 

分 类 号：P184.5[天文地球—天文学] P185.83