滇东罗平县雄武镇地区遥感蚀变信息提取及成矿预测  

Remote sensing alteration information extraction and metallogenic prognosis of Xiongwu Town area,Luoping County,eastern Yunnan Province,China

作　　者：张佩民[1] 张建国[1] 杨自安[1] 刘碧虹[1] 肖文进[1] 唐淑梅 郑跃鹏[3] 

机构地区：[1]有色金属矿产地质调查中心,北京100012 [2]吉林省第二地质调查所,吉林吉林132013 [3]桂林矿产地质研究院,广西桂林541004

出　　处：《地质通报》2009年第6期769-775,共7页Geological Bulletin of China

基　　金：中国地质调查局国土资源大调查项目《云南省罗平大同桂山捧鮓1∶5万区域地质调查》(任务书编号:矿调[2005]3-5)资助

摘　　要：以含铁矿物和含羟基矿物在ETM数据的可见光-短波红外波段所具有的特征光谱为依据,在滇东雄武镇地区采用主成分分析法,选择适宜的主分量图像,对其进行均值滤波、密度分割等处理,获得了高值级、中值级和低值级3种级别的铁化和泥化蚀变异常信息。结合成矿地层、成矿构造、地球化学异常、重砂异常等多元信息进行遥感成矿预测,提出铜钼汞和铜钼Ⅰ级成矿预测区各1个、铜锌Ⅱ级成矿预测区1个、锌砷锑和铁铜Ⅲ级成矿预测区各1个,为该区进一步开展普查找矿指出了方向。This study is based on the characteristic spectrum of visible light to short wave infrared band induced by iron-bearing and hydroxyl-bearing minerals under ETM, by means of principal component analysis, first we selected proper principal component images of Xiongwu Town, Luoping County, eastern Yunnan Province, then we processed them by averaging, signal filtering and density slicing, in the end, high-value, medium-value and low-value iron and argillation alteration informations were obtained. Furthermore, in combination with stratigraphic, structural, geochemical anomaly and heavy sand anomaly informations, metallogenic prognosis by remote sensing is conducted, finally we delineated one Level 1 Cu-Mo-Hg, one Cu-Mo, one Level 2 Cu-Zn, one Level 3 Zn-As-Sb and one Level 3 Fe-Cu prediction area, which provides direction for further general prospecting.

关 键 词：滇东 雄武镇背斜 光谱异常 遥感蚀变信息 成矿预测 

分 类 号：P627[天文地球—地质矿产勘探] P612[天文地球—地质学]