利用ASTER提取德兴斑岩铜矿遥感蚀变分带信息

在遥感光谱分析的基础上,结合德兴斑岩铜矿矿床地质特征,利用ASTER遥感数据提取了德兴斑岩铜矿的遥感蚀变分带信息.德兴斑岩铜矿蚀变分带根据蚀变矿物特征来分析,主要的蚀变矿物为白云母、伊利石、绿泥石、方解石、白云石；根据光谱特征,采用比值、斜率、相关吸收和主成分分析4种提取方法提取各蚀变矿物的信息,并采用叠加法对各蚀变矿物信息进行叠加,从而形成各个蚀变分带的遥感信息.各蚀变分带的遥感信息总体特征比较明显.最后,根据矿床成矿模式对蚀变分带信息进行了分析.

Application of ASTER remote sensing data to extraction of alterration zoning information from Dexing porphyry copper deposit

Remote sensing alteration zoning information of the Dexing porphyry copper deposit was extracted by using ASTER data on the basis of remote sensing spectral analysis and geological features of the Dexing porphyry copper deposit. The main alteration minerals of the alteration zone in the Dexing porphyry copper deposit include muscovite, illite, chlorite and calcite, dolomited by characteristics of alteration minerals. According to the spectral characteristics of main alteration minerals, their remote sensing anomaly information was extracted by using four extraction methods: the ratio, the slope, the related absorption and the principal component analysis, and the information of each remote sensing alteration zone was extracted with the superposition method. Finally, according to the metallogenic model of the ore deposit, the alteration zoning information was analyzed.