陆地卫星TM数字图像提取热液蚀变信息——加拿大BC省“金三角”找金实例

Landsat TM Used to Detect Hydrothermal Alteration Information —An Example from British Columbia's Golden Triangle

加拿大国家遥感中心和地质调查所合作,采用陆地卫星TM数字图像处理,提取和填制热液蚀变带,取得了满意的效果。图像处理的程序和步骤对整个“金三角”热液蚀变带的研究和生产填图具有普遍意义。

Recent mapping and mineralogical studies by Geological Survey and Canada Center for Remote Sensing indicates that Limonitic and aericite alteration are surface indicators of hydrothermal alteration zones that associated with. potentially economic diposits of gold and silver. Landsat TM digital processing technique is applied to extact and map hydrothermal alteration zones. The procedure appears to be successful when applied to the other areas in British Columbia's Golden Triangle.