月球陨石:月球的物质组成及其演化历史的见证

发布时间：2018-01-03 04:27

本文关键词：月球陨石:月球的物质组成及其演化历史的见证　出处：《极地研究》2013年04期 　论文类型：期刊论文

【摘要】：月球陨石是遭受小行星撞击从月球飞溅出来并陨落到地球上的岩石,是研究月球物质成分和演化历史的重要对象。自1979年发现和确认了第一块月球陨石(ALHA 81005)之后,至今已收集到165块月球陨石。虽然Apollo计划和Luna计划采集了382 kg月球样品,但由于飞船登陆采样位置有限,月球陨石对了解月球的物质组成和演化历史提供了重要的样品补充。除了少量具有结晶结构的岩石类型以外,大部分月球陨石为碎屑岩,这些碎屑岩主要有三类:高地斜长质角砾岩、月海玄武质角砾岩和高地斜长质-月海玄武质混合角砾岩。根据岩性分析,尤其是岩屑,月球陨石中存在斜长岩、玄武岩、辉长岩、橄长岩、苏长岩、克里普(KREEP)岩。在月球陨石中逐渐发现了不少克里普岩组分,其中SaU169中VHK的富KREEP成分代表了月球中可能存在的原始富KREEP岩浆源,这为探索月球中克里普岩成因提供了重要信息。据研究,现已发现了6对溅射成对月球陨石,同时,还发现了9个可能的月球陨石来源区域。后成合晶现象的发现对月球表面冲击变质作用研究具有重要的意义。此外,月球陨石同位素年龄和稀有气体成分研究不但获得了月球岩石结晶和月壳形成过程的信息,同时也获得了月球表面的冲击变质历史信息。
[Abstract]:Lunar meteorites from the moon is from asteroids flying out and fall to earth rock, is the study of lunar composition and evolution history of the important object. Since 1979 and confirmed the first lunar meteorites (ALHA 81005), has collected 165 pieces of lunar meteorite. Although the Apollo and Luna programs were collected 382 kg lunar samples, but because the spaceship landed on the sampling position, lunar meteorites in understanding the lunar material composition and evolution history provides an important supplement. In addition to a small amount of samples with the crystalline structure of rock types of lunar meteorites clastic rocks, the clastic rocks are mainly three categories: highland feldspathic breccias Tsukimi Xuanwu breccia and feldspathic Highlands - mare basaltic breccia mixed. According to lithology analysis, especially the existence of cuttings, anorthosite, lunar meteorites basalt, gabbro, troctolite , norite, cripe (KREEP) in rocks. Lunar meteorites gradually found a lot of Kreep rock composition, which is rich in KREEP components of SaU169 VHK represents the moon may exist in the original KREEP rich magma source, which provides important information for exploring the causes of the moon. Cripe rock according to the research, it has been found that 6 the sputtering paired lunar meteorites, at the same time, it is also found in the 9 region of the lunar meteorite source. Found symplektite phenomenon is of great significance for the metamorphism of the lunar surface impact. In addition, the isotopic ages and rare gas constituents not only obtain the crystallization of lunar rocks and the formation of the lunar crust process information. At the same time also received a shock metamorphic history information of the lunar surface.

【作者单位】：桂林理工大学广西矿冶与环境科学实验中心;广西隐伏金属矿产勘查重点实验室;
【基金】：国家自然科学基金(41173077) 国家自然资源平台建设项目(2005DKA21406-1) 广西隐伏金属矿产勘查重点实验室主任基金项目(13-A-01-02)资助
【分类号】：P185.83
【正文快照】： 0引言陨石来自太阳系行星和小行星,是太阳系不同演化阶段的产物,是太阳系形成和演化历史的见证者,是探索太阳系起源奥秘的重要窗口[1]。根据是否经历岩浆分异作用,陨石分为原始星云凝聚的球粒陨石和经历岩浆作用的分异型陨石。分异型陨石对了解其母体小行星或行星的物质成分和

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