火星Eberswalde撞击坑三角洲矿物丰度反演

被引:3
作者
张霞 [1 ]
吴兴 [1 ,2 ]
林红磊 [1 ,2 ]
王楠 [1 ]
机构
[1] 中国科学院遥感与数字地球研究所
[2] 中国科学院大学
关键词
火星; Eberswalde撞击坑; 矿物; 协同稀疏分解; 丰度反演;
D O I
暂无
中图分类号
P185.3 [火星];
学科分类号
070401 ;
摘要
矿物的种类与含量可限定其形成时特定的地质环境,因此火星表面矿物识别和丰度反演研究对了解火星的地质构造及历史演变过程具有重要意义。Eberswalde撞击坑具有复杂的水文系统,是火星探测的热点地区,而对该地区大范围矿物反演则鲜有研究。基于紧凑型侦查成像光谱仪(CRISM)目标探测模式数据和CRISM光谱库,首先,通过高光谱数据子空间识别算法(Hysime)分析CRISM数据信号子空间,并将光谱库所有矿物光谱投影到子空间上,保留投影误差较小的光谱作为约简后的端元光谱库;然后,使用协同稀疏解混对Eberswalde撞击坑西北部三角洲地区的矿物丰度进行定量反演,得到5种原生矿物:辉石、橄榄石、斜长石、菱铁矿、硬水铝石和1种蚀变矿物透闪石,并从矿物光谱、分布分别对反演结果进行验证;最后,从矿物学的角度对可能成因做出解释,推测该区域存在接触变质作用。
引用
收藏
页码:304 / 312
页数:9
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