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青藏大陆北缘盆山耦合带库斯拉甫地区遥感蚀变信息提取

DOI: 10.6046/gtzyyg.2014.01.22, PP. 127-131

Keywords: TM,蚀变信息,主成分分析,密度分割

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Abstract:

新疆库斯拉甫地处青藏大陆北缘西昆仑复合造山带与塔里木大陆南缘的碰撞结合带,具备良好的成矿地质条件;但自然环境恶劣,可进入条件差,有不少重要地质现象和找矿信息若采用常规地质调查方法难以获取。许多应用实践已经证明,日趋成熟的遥感技术能够很好地弥补这方面的不足。以库斯拉甫地区为研究区,以ETM+图像为数据源,在ENVI软件环境下,综合运用比值运算、掩模处理、主成分分析和密度分割等方法对遥感数据进行处理,提取出研究区近矿围岩蚀变信息;并通过与研究区已有矿点信息和化探异常信息进行叠置分析,对提取的遥感蚀变信息进行验证。结果表明,利用上述方法提取羟基蚀变信息是可行的,可为研究区今后开展大范围地质找矿提供依据。

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