青海玉树地区遥感找矿蚀变异常提取与成矿预测

Alterations Anomaly Abstraction of Mineral Survey with Remote Sensing and Metallogenic Prognosis in Yushu,Qinghai

遥感找矿蚀变异常提取是当今综合找矿的重要手段之一。以青海玉树地区的遥感找矿蚀变异常提取为例,运用主成分分析、波段比值、波段比值的主成分分析复合法、无损线性拉伸、掩膜、密度分割等方法,解决了第四系和植被对遥感蚀变异常提取的干扰的问题。在该工作区内共圈出了6个Ⅰ级找矿远景区,3个Ⅱ级找矿远景区,7个Ⅲ级找矿远景区;遥感蚀变异常区与全部矿床、矿(化)点吻合率高达88.1%,与含铜、含铅、含锌、含铁的金属矿床、矿(化)点吻合率分别为93.22%,75.76%,78.26%,100%。

Alterations anomaly abstraction of mineral survey with remote sensing Method is one of the important methods of mineral survey in nowadays. Such as which used in Yushu, Qinghai It used principal components analysis, band radio, principal components integration of different band radio images, harmless linear Extension, image masking and density segment methods. By such means, it solves the problems of remote sensing alteration anomaly abstraction which interfered by the Quaternary and vegetation. The area were out for 6 grade I potential areas, 3 grade Ⅲ potential areas and 7 grade Ⅲ potential areas. The remote sensing alterations anomaly area is identical with all mineral deposits in the rate of 88.1% , and it is respectively identical with deposit of Copper Mine, deposit of Lead, deposit of Zinc and deposit of Iron in the rate of 93.22%, 75.7%, 78.26%, 100%.