【摘要】 采用陆地卫星ＴＭ比值合成图像，在中等植被覆盖地区提取与陆相火山～次火山活动有关的热液型金银矿床的蚀变信息效果较好。在着重分析与金银矿床有关的几种热液蚀变矿物的反射光谱特征的基础上，对采用的波段比值方法做了进一步的阐述。同时利用两种比值合成处理的图像，结合物化探等资料，进行金银矿床找矿预测，经野外验证，发现了新的矿化地段，取得了较好的找矿效果。更多还原

【Abstract】 Abstract Apply ratio-composite processing method of Landsat TM data to extract the hydrothermal altered minerals information on Au-Ag deposit in the moderatevegetation covered area. It was emphasized to analyse a few reflective spectrum characteristics of the hydrothermal altered minerals. And two ratio-composite images with the geophysical and geochemical data were used to predict deposit.New mineralized area was discovered.更多还原