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地球学报  2009 

ASTER遥感数据蚀变遥感异常提取研究

DOI: 10.3975/cagsb.2009.02.17

Keywords: ASTER,遥感数据,蚀变异常,波谱特征,蚀变矿物

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Abstract:

基于ETM+/TM数据提取矿化蚀变遥感异常已趋于成熟,而利用ASTER(先进星载热发射和反射辐射仪)遥感数据提取矿化蚀变遥感异常鲜有报道。本研究利用USGS波谱数据库中典型蚀变矿物反射率数据,重建其在ASTER数据中波谱曲线研究表明,ASTER遥感数据可以提取Mg-OH、Al-OH、CO32?和Fe3+离子(基团)信息。热液矿床的蚀变围岩通常含有上述4种离子(基团),它们的波谱特征是蚀变遥感异常提取的理论依据。本研究利用改进“去干扰异常主分量门限技术流程”,以河北省承德地区和太行山区为例,上述离子(基团)信息提取结果与野外实际分布相一致,表明利用ASTER遥感数据提取上述4种离子(基团)信息是可靠的。

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