顾及太空风化效应的虹湾地区矿物含量反演

发布时间：2018-01-21 11:44

本文关键词： 太空风化 Hapke模型虹湾矿物反演　出处：《地球科学》2016年12期 　论文类型：期刊论文

【摘要】：月表矿物含量反演是研究月球地质起源和演化的关键.太空风化作用普遍发生在月球表面,对矿物纯净光谱造成了不可忽视的影响,它弱化光谱吸收特征,降低反射率,影响矿物含量遥感反演精度.基于Relab光谱库和Hapke辐射传输模型,将月表4种矿物(单斜辉石、斜方辉石、斜长石、橄榄石)的二向性反射率转换成同向性的单次散射反照率,然后计算矿物的光学常数;再根据亚微观金属铁SMFe(submicroscopic metallic iron)的质量分数模拟6种不同程度太空风化效应,得到端元矿物的反射率光谱;最后基于上述方法,利用多端元线性分解方法和M3(moon mineralogy mapper,月球矿物绘图仪)高光谱数据反演不同风化程度下的矿物含量,得到月表虹湾地区辉石、斜长石、橄榄石3种矿物的含量分布.实验表明,利用多端元线性分解可以有效模拟太空风化效应对矿物光谱的影响,是研究太空风化效应影响下矿物识别及含量反演的一种行之有效的方法.
[Abstract]:The inversion of lunar surface mineral content is the key to study the origin and evolution of lunar geology. Space weathering generally occurs on the surface of the moon, which has an unnegligible effect on the pure spectrum of minerals and weakens the absorption characteristics of the spectrum. Based on Relab spectral library and Hapke radiation transfer model, four minerals (clinopyroxene, orthopyroxene, plagioclase) were studied. The bidirectional reflectivity of olivine is converted into homotactic single scattering albedo, and then the optical constants of minerals are calculated. Six different degrees of space weathering were simulated according to the mass fraction of SMFe(submicroscopic metallic Iron. The reflectance spectra of the terminal minerals were obtained. Finally, based on the above method, the multiterminal linear decomposition method and M3 moon mineralogy mapper are used. The content distribution of pyroxene plagioclase olivine and pyroxene plagioclase in the Hongwan area of the moon surface is obtained by inversion of the mineral content under different weathering degrees from the hyperspectral data of the lunar mineral plotter. The effects of space weathering on mineral spectra can be effectively simulated by using multiterminal linear decomposition. It is an effective method to study mineral identification and content inversion under the influence of space weathering.
【作者单位】：中国地质大学计算机学院;中国地质大学信息工程学院;新疆维吾尔自治区测绘科学研究院;
【基金】：中央高校基本科研业务费专项资金项目(No.CUGL130261) 湖北省2014年面上自然科学基金项目(No.2014CFB911) 国家“十二五”国家高技术研究发展计划课题(“863”课题)(No.2014AA123001)
【分类号】：P184.5
【正文快照】： 0引言月表主要矿物的空间分布是月球探测任务的一个重要科学问题,也是研究月球起源、演化等问题的重要基础信息之一(Weider et al.,2012).由于缺乏大气层的保护,各种辐射可以直接抵达月球表面并与月壤相互作用,月表遭受太阳风离子的辐射和注入以及大大小小陨石和微陨石的撞击,

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