摘要
甘肃北山属大陆性气候区,裸露着无古代和古生代地层。华力西中-晚期的构造岩浆活动强 烈,并伴生有金、铜等多种矿产。根据矿物岩石的反射波谱和TM数据统计特征,选用TM7、TM5、 TM4合成图像和TM5/TM4、TM5/TM7比值图像,不仅提供了丰富的构造信息,而且可以区分多 种岩性和圈定有一定规模的热液蚀变岩石晕。用于1:50,000—1:500,000地质制图和圈定找矿靶 区,取得了良好的经济效益和找矿效果。
Beishan Mountain Area is an area situated in Gansu Province with Pa- laeozoic and Proterozoic strata widely exposed. During Middle-Late variscian intense tecfonic-magmatic activity took place with Au-Gu mineral resources. Based on spectral properties and statistical results of TM data, TM7.TM5.TM4 images are picked up to make colour composite image and ratio image(5/7, 5/ 4) .Thetransformed image provide both structural informations and lithological information, especially information of hydrothermal alteration zones. These techniques are applied to geological mapping and locating prospecting targets. Results obtained are satisfying.
出处
《国土资源遥感》
CSCD
1990年第3期18-23,共6页
Remote Sensing for Land & Resources