嫦娥五号月壤中钛铁矿的工艺矿物学研究  

A study on process mineralogy of ilmenite in the Chang'e-5 lunar soil

作　　者：刘浩[1,2] 刘建忠 缪秉魁[1] 曾小家[2] 朱凯 夏志鹏 陈国柱[1] LIU Hao;LIU Jian-zhong;MIAO Bing-kui;ZENG Xiao-jia;ZHU Kai;XIA Zhi-peng;CHEN Guo-zhu(Institution of Meteorites and Planetary Materials Research,Key Laboratory of Planetary Geological Evolution,Guangxi Key Laboratory of Exploration for Hidden Metallic Ore Deposits,Guilin University of Technology,Guilin Guangxi 541006,China;Center for Lunar and Planetary Science,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,China)

机构地区：[1]桂林理工大学陨石与行星物质研究中心,行星地质演化广西高校重点实验室,广西隐伏矿产勘查重点实验室,桂林541006 [2]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

出　　处：《矿物岩石地球化学通报》2024年第5期1037-1048,共12页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家重点研发计划项目(2022YFF0503100);中国科学院战略性先导科技专项(B类)项目(XDB41000000);中国科学院重点部署科研专项(KGFZD-145-23-15);广西科技基地与人才建设专项课题(桂科AD23026084,AD1850007)。

摘　　要：嫦娥五号任务采样点位于月球风暴洋的月海玄武岩单元,其中钛铁矿含量为5%~10%(体积分数,下同)。本文从资源利用的角度开展了钛铁矿的工艺矿物学研究,以期为月球资源的采、选、冶等提供基础参数。本研究利用扫描电镜、电子探针等实验方法,对嫦娥五号月壤样品的矿物组成,以及样品中钛铁矿的粒度特征、颗粒形状、化学成分和解离度等进行了分析研究。结果表明,嫦娥五号玄武岩中的钛铁矿以细粒为主,其中粒度为7.5~200μm的钛铁矿数量占97%;钛铁矿颗粒呈粒状、针状、柱状和不规则状,数量较多的是粒状与不规则状;钛铁矿中TiO_(2)含量为50.78%(质量分数),FeO含量为47.35%,其中粒状、不规则状钛铁矿TiO_(2)含量变化范围相较于针状、柱状变化范围更大;含钛铁矿的矿物颗粒整体的粒径越小,钛铁矿的单体解离度越大,更容易解离为单体。The Chang'e-5 mission sampling site is located in the lunar mare basalt unit of the Oceanus Procellarum.The sample contains 5%to 10%ilmenite.In this paper,the process mineralogy of ilmenite has been studied from the perspective of resource utilization,in order to provide basic parameters for mining,processing and smelting of mineral resources of the Moon.By using scanning electron microscopy and electron probe,we have studied mineral composition of the Chang'e-5 sample and its contained ilmenite properties including the particle size characteristics,particle shapes,chemical compositions and dissociation degrees of ilmenites in the sample.The results show that ilmenites in the Chang'e-5 basalt are mainly fine grained,with sizes of 97%ilmenites varying from 7.5 to 200μm.Ilmenite particles are granular,acicular,columnar and irregular shaped.Most of them are granular and irregular shaped.The average contents of TiO_(2) and FeO in ilmenites are 50.78%and 47.35%respectively.Especially,the variation ranges of TiO_(2) contents in granular and irregular ilmenites are larger than those of the acicular and columnar ilmenites.The smaller the overall size of the mineral particles containing ilmenite,the greater the degree of monomer dissociation of ilmenite,ilmenite more easily dissociated into monomer.

关 键 词：嫦娥五号样品 钛铁矿 工艺矿物学 月球资源 

分 类 号：P575.5[天文地球—矿物学]