柴北缘阿木尼克地区蚀变遥感异常信息提取及找矿预测

Remote Sensing Anomaly Information Extraction and Prospecting Prediction of Alteration in Amunike Area,Northern Margin of Qaidam

利用遥感技术可以快速提取蚀变异常信息,为矿产勘查提供依据。在Landsat 8 OLI多光谱遥感数据的基础上,通过主成分分析法提取了阿木尼克地区的铁染与羟基异常信息,并采用主分量门限法划定异常等级。结果表明:阿木尼克地区蚀变异常信息较为集中,铁染异常信息主要呈NW向条带状或碎斑状展布在阿木尼克山西部地区,在阿木尼克山东部、达达肯乌拉山南部、牛首山中部小面积集中分布;羟基异常信息主要呈NW向条带状展布于阿木尼克山东部地区,在达达肯乌拉山WN部和牛首山东部地区小面积集中分布。提取结果与已知矿点重合较好,异常提取结果可以作为进一步找矿的依据。

Remote sensing technology can quickly extract alteration anomaly information and provide basis for mineral exploration.Based on Landsat 8 OLI multispectral remote sensing data,the information of iron stain and hydroxyl anomaly in Amunike region was extracted by principal component analysis,and the anomaly grade was determined by the principal component threshold method.The results show that:The alteration anomaly information in Amunike area is more concentrated,and the information of iron anomaly is mainly distributed in the west of Amunike Mountain in the NW direction,in the east of Amunike Mountain,in the south of Dadakenwula Mountain and in the middle of Niushou Mountain in small areas.The abnormal information of hydroxyl group was mainly distributed in a NW trending strip in the eastern part of Amunike Mountain,and concentrated in a small area in the WN part of Dadakenwula Mountain and the eastern part of Niushou Mountain.The extraction results coincide well with the known ore points,and the abnormal extraction results can be used as the basis for further prospecting.