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成矿环境的地质分析与遥感探测标志是矿产遥感定位的关键 ,高寒山区大面积的冰雪覆盖给应用遥感技术勘查矿产资源带来困难 ,经喀喇昆仑区域大地构造背景、成矿环境与标志分析 ,认识到燕山期花岗岩、花岗闪长岩内外接触带受断裂控制的热液脉型矿床是明铁盖地区的首选矿产遥感目标。利用掩膜去掉冰川和积雪后的主成分变换 (MPCA)技术处理陆地卫星TM数据 ,MPCA3,5和 6合成图像揭示了褐铁矿化等蚀变色调异常信息 ,花岗闪长岩环形影像及其南缘构造透镜体等成矿蚀变和构造的组合信息 ,明确了野外验证目标 ,发现了罗布盖子沟多金属矿化区
Geological analysis of the metallogenic environment and remote sensing detection are the keys to the remote sensing positioning of mineral resources. The large area of snow and ice cover in the alpine mountainous area makes it difficult to apply remote sensing technology to mineral resources exploration. Based on the tectonic setting of the Karakoram region, the metallogenic environment and the sign analysis It is recognized that the mineralization of the Yanshanian granite and granodiorite is the first choice mineral remote sensing target in the Mingtigai area. Using the MPCA technique to remove the glacier and snow-capped masks, the MPCA3, 5 and 6 composite images reveal the altered tonal anomalies such as the limonite mineralization, the ring-shaped image of the granodiorite And the southern margin of the lens structure and other metallogenic alteration and tectonic combination of information, a clear field validation goal, found that Robbigazi polymetallic mineralization area