摘要
以ASTER影像为数据源、野外实测波谱数据为参考,用光谱角分类法(SAM)在个旧矿区提取矿化蚀变信息。为剔除假"异常"信息,用ASTER热红外波段的比值计算定义硅酸盐、碳酸盐和超基性岩指数作RGB合成得反应岩性信息的影像,据此确定西区重点研究区。在此区域再次用SAM提取矿化蚀变信息,结合用ASTER短波红外数据的比值计算增强的构造信息,分析提取的重点研究区矿化蚀变信息结果,为该矿区找矿工作提供了参考。
The metaUogenesis and Alteration information of Gejiu Orefield are extracted with the classification method （SAM） of spectrospic angle, using ASTER as the data source and referring to the field measured wave spectrum data. In order to get rid of the false ＂ anomaly＂ information, the indices of silicate, carbonate and ultrabasic rock are calculated and defined with the ASTER thermal infrared spectra ratio, then making RGB and composite image of Lithological information, thus the key area of west region is determined. In this area, we use SAM for extracting the metallogenesis and alteration information again. In combination with the intensive structural information calculated with the ASTER short wave infrared data, analysis of the result of extracted metsllogenesis and alteration information of the key area, which has provided the reference material for the ore prospecting in this orefield.
出处
《云南地质》
2008年第4期502-508,共7页
Yunnan Geology
基金
云南云锡集团公司横向合作项目"云南个旧锡矿西区多元信息综合找矿预测研究"资助
