相山铀矿田蚀变遥感异常及地质意义

蚀变遥感异常是矿产资源综合评价与定位预测的一个新的独立参数, 应用ETM+数据在基岩裸露区进行含水矿物的蚀变遥感异常提取的技术日趋成熟, 但在植被覆盖区的提取效果一直在探索之中。通过对植被发育的相山铀矿田ETM+数据主成分分析, 基本消除了植被的影响, 获得了良好的含水矿物蚀变遥感异常信息。其中分布在相山矿田西北部碎斑熔岩中的或北部西段变质岩中的蚀变遥感异常是热液水云母化引起的, 具有重要的找矿意义。

Alteration Remote Sensing Anomalies of Xiangshan Uranium Field and Its Geological Implications

Alteration remote sensing anomaly is a new independent parameter for overall evaluation and location predication for mineral resource.With the ETM~ data in the area with the bare base rock,the technique extracting alteration remote sensing anomaly composing of minerals containing water grown up;but in the area of cover with vegetation the extracting effect is in explore.In this paper,by principal component analysis of ETM~ data from Xiangshan U field covering with vegetation,the author avoid the influence of vegetation,obtained good alteration RS anomaly containing water minerals,which both in rhyolitic porphyroclastic lava of northwest field and in metamorphic rock of west part of northern field are all the products of the hydrothermal hydronuscoviting and possess important exploring significance.