月壤颗粒微观环带的太空风化成因

发布时间：2017-12-31 16:42

本文关键词：月壤颗粒微观环带的太空风化成因　出处：《地球科学进展》2012年06期 　论文类型：期刊论文

【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。
[Abstract]:Space weathering is the main factor affecting the evolution of lunar surface material so far in 3 billion 100 million years, including the meteorite, meteorite bombardment micro, injected particles in the solar wind, the sun / the Milky Way cosmic ray radiation and periodic heating effect. Through in-depth analysis into the solar wind particles and sputtering, evaporation and deposition of micro meteorite bombardment the mechanism of radiation damage of the cosmic rays, discusses the different space weathering process of mineral particles strip thickness, chemical composition, crystal structure and other characteristics of the influence, see micro meteorite bombardment with the solar wind injection is the dominant factor of lunar regolith particle micro ring, effects of cosmic radiation and periodic heating negligible. Further combined with the amorphous strip, rich inclusions zoning, zoning and zoning and other polycyclic vesicles of lunar regolith particle main belt the basic characteristics, in summary Comparison and analysis of various types of strip thickness, basic structure and chemical characteristics, causes of different types of zoning were preliminarily inferred, that amorphous zoning, zoning and zoning of the inner vesicle polycyclic belt has the characteristics of wind and solar, rich inclusions band, polycyclic ring outer zones has characteristics of micrometeorite bombardment at present. According to the chemical composition analysis and interpretation to rely solely on the band girdle origin are insufficient, pointed out by adding new ideas of mineral crystal structure in the simulation of space weathering variation during the experiment to study the causes of the band.

【作者单位】：中国科学院地球化学研究所月球与行星科学研究中心;中国科学院研究生院;
【基金】：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
【分类号】：P184
【正文快照】： 1引言太空风化是指陨石(尤其是微陨石)、太阳风、宇宙射线等来自宇宙空间的各种物质以及天体表面周期性热效应改变月球等无大气天体表面物质的物理性质、化学组成、矿物性质、光谱特征的过程。太空风化制约着无大气天体表面物质的演化过程,对空间遥感探测数据的精确分析以及

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