新疆卡拉塔格地区航空高光谱矿物填图及找矿预测

Airborne hyper-spectral mineral mapping and prospecting prediction in the Kalatage area,Xinjiang

利用HyMap机载成像光谱仪,获取了新疆卡拉塔格地区的高光谱遥感数据,对数据进行了辐射校正和辐射定标、大气校正(光谱重建)与几何校正等预处理,同时利用ASD光谱仪,开展了成矿有利地质单元和典型矿床地面岩矿光谱测量,进行了典型蚀变矿物光谱特征的提取和光谱分析。在数据处理与光谱分析的基础上,采用混合调制匹配滤波法对矿物进行了识别和填图工作,并编制了蚀变矿物分布图。通过野外调查验证和地质综合分析,圈定了8处找矿有利地段,取得了良好的应用效果。

HyMap airborne imaging spectrometer is used to obtain hyperspectral remote sensing data in the Kalatage region, Xin- jiang. Radiometric correction, radiometric calibration, atmospheric correction （spectral reconstruction） and geometric correction were carried out to pre-process the measured data. Meanwhile, ASD spectrometer is used to carry out the ground spectrum measurement in the favorable mineralization areas and typical deposit area. The spectral characteristics of typical alteration minerals were extracted and analyzed. On the basis of hyper-spectral data and ground spectral data processing, and comparative analysis of measured image spec- trum, the ixture Tuned Matched Filtering method is used to identify the alteration minerals and the distribution map of alteration miner- als was accomplished. Based on geological comprehensive analysis and field investigation, eight favorable areas were outlined for further prospecting.