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    顾及太空风化效应的虹湾地区矿物含量反演

    郭艳 张琪 李婵 董晓莹 刘福江

    郭艳, 张琪, 李婵, 董晓莹, 刘福江, 2016. 顾及太空风化效应的虹湾地区矿物含量反演. 地球科学, 41(12): 2100-2108. doi: 10.3799/dqkx.2016.145
    引用本文: 郭艳, 张琪, 李婵, 董晓莹, 刘福江, 2016. 顾及太空风化效应的虹湾地区矿物含量反演. 地球科学, 41(12): 2100-2108. doi: 10.3799/dqkx.2016.145
    Guo Yan, Zhang Qi, Li Chan, Dong Xiaoying, Liu Fujiang, 2016. Lunar Mineral Abundance Inversion of Sinus Iridum Considering Space Weathering Effect. Earth Science, 41(12): 2100-2108. doi: 10.3799/dqkx.2016.145
    Citation: Guo Yan, Zhang Qi, Li Chan, Dong Xiaoying, Liu Fujiang, 2016. Lunar Mineral Abundance Inversion of Sinus Iridum Considering Space Weathering Effect. Earth Science, 41(12): 2100-2108. doi: 10.3799/dqkx.2016.145

    顾及太空风化效应的虹湾地区矿物含量反演

    doi: 10.3799/dqkx.2016.145
    基金项目: 

    国家“十二五”国家高技术研究发展计划课题(“863”课题) 2014AA123001

    中央高校基本科研业务费专项资金项目 CUGL130261

    湖北省2014年面上自然科学基金项目 2014CFB911

    详细信息
      作者简介:

      郭艳(1975-),女,副教授,硕士生导师,主要从事遥感数据处理、智能计算及其应用、信息系统研发方向的研究.E-mail: 323110966@qq.com

      通讯作者:

      张琪,E-mail: zhangqicug@163.com

    • 中图分类号: P577

    Lunar Mineral Abundance Inversion of Sinus Iridum Considering Space Weathering Effect

    • 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.

       

    • 图  1  月表矿物含量反演流程

      Fig.  1.  Flow chart of minerals abundance mapping

      图  2  不同风化程度下矿物的反射率(左)以及去除连续统的光谱(右)

      a.单斜辉石的反射率光谱;b.单斜辉石的去除连续统光谱;c.斜方辉石的反射率光谱;d.斜方辉石的去除连续统光谱;e.斜长石的反射率光谱;f.斜长石的去除连续统光谱;g.橄榄石的反射率光谱;h.橄榄石的去除连续统光谱

      Fig.  2.  Mineral reflectance spectral (left) and continuum removal spectral (right) under different space weathering levels

      图  3  相同太空风化效应下不同矿物反射光谱

      a.f=0%;b.f=0.1%;c.f=0.3%;d.f=0.5%;e.f=0.7%;f.f=1%

      Fig.  3.  Reflectance spectral of different minerals under the same space weathering level

      图  4  月表虹湾地区矿物含量反演结果

      a.单斜辉石;b.斜长石;c.橄榄石;d.RMSE

      Fig.  4.  Distribution of inversed lunar mineral abundance in Sinus Iridum

      图  5  虹湾地区单斜辉石(a)、斜长石(b)、橄榄石(c)含量反演结果直方图统计

      Fig.  5.  Histograms of clinopyroxene (a), plagioclase (b), and olivine (c) abundance of Sinus Iridum

      图  6  Apollo 17区域矿物含量反演结果

      Fig.  6.  Distribution of inversed lunar mineral abundance in Apollo 17

      表  1  M3主要技术和性能指标

      Table  1.   Main index and performance parameter of M3

      视场(km) 光谱范围(nm) 采样间隔(nm) 空间分辨率(m/pixel) 波段数(个) 光谱分辨率(nm)
      Target模式 40 430~3 000 5 70 261 10
      Global模式 40 430~3 000 5 140 85 20/40
      下载: 导出CSV

      表  2  Relab光谱库端元矿物光学常数信息

      Table  2.   Optical constant information of endmember minerals in Relab spectral library

      矿物类别 样本编号 光谱范围(nm) DU(μm) DL(μm) < D >(μm) n 区域
      单斜辉石 LS-CMP-009 350~2 600 250 5 20 1.727 Apollo 12
      斜方辉石 LS-CMP-012 350~2 600 250 5 20 1.768 Apollo 17
      斜长石 LS-CMP-011 350~2 600 500 5 23 1.560 Apollo 15
      橄榄石 LR-CMP-014 300~2 600 45 5 11 1.827 Apollo 17
      下载: 导出CSV

      表  3  Apollo 17矿物实测含量与分解含量对比

      Table  3.   Comparison between mineral abundances inversed and measured in Apollo 17

      Apollo 17 实测含量(%) 分解含量(%) 众数(%)
      辉石 30.1 38.0 38.10
      斜长石 34.1 61.9 62.30
      橄榄石 0.2 0.4 0.11
      钛铁矿 12.8 -
      玻璃 21.9 -
      其他 0.7 -
      总计 99.9 100.3
      下载: 导出CSV
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