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地球科学进展  2012, Vol. 27 Issue (6): 603-612    DOI: 10.11867/j.issn.1001-8166.2012.06.0603
综述与评述     
月壤颗粒微观环带的太空风化成因
李阳1,2,李雄耀1*,王世杰1,唐红1,李世杰1
1.中国科学院地球化学研究所月球与行星科学研究中心,贵州贵阳550002;2.中国科学院研究生院,北京100049
Space Weathering Origin of Microstructure Rims of Lunar Soil Grains
Li Yang1,2, Li Xiongyao1, Wang Shijie1, Tang Hong1, Li Shijie1
1.Lunar and Planetary Science Research Center,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang550002,China;
2. Graduate University of the Chinese Academy of Sciences, Beijing100049, China
 全文: PDF(1190 KB)  
摘要:

太空风化是迄今31亿年以来影响月球表面物质演化过程的主要因素,主要包括陨石、微陨石的轰击,太阳风粒子的注入,太阳/银河宇宙射线的辐射以及周期性的加热作用等。通过深入剖析太阳风粒子的注入与溅射、微陨石轰击的蒸发与沉积、宇宙射线辐射的辐射损伤等过程的作用机理,探讨了不同太空风化过程对矿物颗粒环带厚度、化学组成、晶体结构等特征的影响,认为微陨石轰击与太阳风注入是形成月壤颗粒微观环带的主导因素,宇宙射线辐射与周期性加热的影响可忽略不计。进一步结合非晶质环带、富内含物环带、多环环带以及小泡环带等月壤颗粒主要环带的基本特征,在总结和对比分析各类型环带的厚度、结构以及化学组成特征基础上,对不同类型环带的成因进行初步推断,认为非晶质环带、小泡环带以及多环环带的内层环带具有太阳风作用特征,而富内含物环带、多环环带的外层环带则具有微陨石轰击的成因特征。根据目前单纯依靠环带的化学组成分析解释环带成因存在的不足,指出了通过补充分析矿物晶体结构在模拟太空风化实验过程中的变化特征来研究环带成因的新思路。

关键词: 月球月壤环带太空风化    
Abstract:

Space weathering plays an important role in the evolution of lunar surface material in the last 3.1 Ga, which includes bombardment of meteorites and micrometeorites, implantation and sputtering of solar wind particles, radiation of solar/galaxy cosmic ray, as well as periodical heating. By analyzing the mechanisms of implantation and sputtering of solar wind particles, vaporization and deposition in micrometeorite bombardment, radiation damage of solar and galaxy cosmic rays, and periodical heating, the thickness, chemical composition and microstructure characteristics of grain rims are related to the difference processes of lunar space weathering. With these analysis, the micrometeorites bombardment and implantation and sputtering of solar wind are thought to be the main source, and radiation of solar and galaxy cosmic rays and periodical heating make little effect on the change of mineral grains properties. Based on the conclusions and comparison of the thickness, chemical composition and microstructure of different types grain rims, the origin of these rims are deduced. Amorphous rim, vesicular rim and the inner part of multi-rim are thought to be formed by the solar wind implantation and sputtering, inclusion-rich rim and the outer part of multi-rim might be formed in micrometeorites bombardment. For the disadvantage in explaining the origin of grain rims depend on chemical property, microstructure analysis of grain rim and simulated experiment are proposed to comprehend the origin of grain rims supplemental.

Key words: Moon    Lunar soil    Grain rims    Space weathering
收稿日期: 2011-12-28 出版日期: 2012-06-10
:  P184  
基金资助:

国家高技术研究发展计划项目“月表物质微波传输特性及月壤厚度反演技术与模型研究”(编号:2010AA122204);国家自然科学基金项目“太空风化作用形成的单质铁对UVVISNIR光谱特征的影响”(编号:40803019)和“南极陨石GRV020043的矿物岩石地球化学特征以及与Acapulcoite陨石的关系研究”(编号:41003027)资助

通讯作者: 李雄耀(1978-),男,广西南宁人,副研究员,主要从事月球与行星科学研究.     E-mail: lixiongyao@vip.skleg.cn
作者简介: 李阳(1984-),男,河北衡水人,博士研究生,主要从事月球与行星科学研究. E-mail:liyang@mail.gyig.ac.cn
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李阳,李雄耀,王世杰,唐红,李世杰. 月壤颗粒微观环带的太空风化成因[J]. 地球科学进展, 2012, 27(6): 603-612.

Li Yang, Li Xiongyao, Wang Shijie, Tang Hong, Li Shijie. Space Weathering Origin of Microstructure Rims of Lunar Soil Grains. Advances in Earth Science, 2012, 27(6): 603-612.

链接本文:

http://www.adearth.ac.cn/CN/10.11867/j.issn.1001-8166.2012.06.0603        http://www.adearth.ac.cn/CN/Y2012/V27/I6/603

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