冀东地区金矿地质遥感信息提取方法研究

EXTRACTION OF REMOTE SENSING INFORMATION FOR GOLD DEPOSITS, EASTERN HEBEI

冀东地区金矿主要包括金厂峪、长城式和峪耳崖型。后期叠加断裂构造往往直接控制矿体产出，黄铁矿化是矿化主要标志。根据光谱特征可把金矿区围岩、蚀变岩和矿脉分开。位于断裂附近的羟基和３价铁信息复合异常地带是金矿化远景区。热红外多光谱资料对岩性和构造识别有明显效果，可以进行变质岩与白云岩的区分和区内主要出露岩类的区分。区域性断裂—线性构造。

The Jinchangyu-type, Great Wall-type and Yuerya-type deposits are typical gold deposits in eastern Hebei. The orebodies are controlled by late superimposed faults.The mineralization is characterized by pyritization. The wallrocks , altered rocks and veins can be distinguished by spectrum features. The areas in which the hydroxyl anomaly and iron stain are developed near faults are good prospects for gold mineralization. It is proved that the thermal infrared multispectral scanner is efficient in discrimination of lithology and structures, which can be used to distinguish the metamorphic rocks and dolomite.The ore-controlling structures such as regional linear structure, ductile shear zone and fractures can be easily identified on images.