青海同德地区遥感蚀变异常信息提取在找矿中的应用

Application of remote sensing alteration anomaly information extraction in prospecting in Tongde area,Qinghai Province

近年来,应用遥感数据进行蚀变信息提取来进行成矿预测已经成为了一种流行的技术手段。本文通过ETM+多光谱数据,采用主成分分析的方法,在青海同德地区开展大范围的寻找与斑岩型铜矿、蚀变破碎岩型金矿生成有密切关系的铁染、羟基蚀变信息,通过对其筛选与分级,从而大范围缩小找矿靶区。

In recent years,using remote sensing data to extract alteration information for metallogenic prediction has become a popular technical means.Based on ETM+multispectral data and the method of principal component analysis,this paper carries out a large-scale search for iron staining and hydroxyl alteration information closely related to the formation of porphyry copper deposit and altered broken rock gold deposit in Tongde area,Qinghai Province.Through its screening and classification,the prospecting target area can be reduced on a large scale.