【摘要】 笔者运用不同波段组合的遥感比值图像的主成份复合技术进行热液蚀变信息增强，研制了一 种利用陆地卫星ＴＭ数据在有植被覆盖的湿润亚热带火山岩区自动提取矿化蚀变信息的新方法，并 在浙东新昌拔茅金银多金属矿区的试验研究中获得了成功，不仅有效地显示了矿区内已知蚀变岩 的展布，还揭示出了一些前人未知的热液蚀变岩区、硅化石英脉、控矿物造及火山机构等对成矿 预测极有价值的信息。更多还原

【Abstract】 Authors applied the principal component integretion of different band radio images to enhancing hydro-thermal alteration information and developed a new method for extracting mineralized information from Landsat TM data in volcanic rock area covered by vegetation, moist subtropical zone. On trial, great successes have been achived in Bamao Au and Ag multimetal mineralized area, Xinchang County, east Zhejiang province. Not only are the known altered zones in the mineralized area displayed effectively, but also several unknown hydrothermal altered zones, silicified quartz veins, ore-ccontro- lling structures and volcanic apparatuses, which are very useful for mineral prospecting, are revealed here.更多还原