青海查肖玛地区遥感蚀变信息提取及成矿预测

Remote Sensing Alteration Information Extraction and Metallogenic Prognosis in ChaXiaoma Area of Qinghai Province

查肖玛地区位于青海省西南部唐古拉山北坡,三江成矿带北西端,具有良好的找矿前景。运用美国landsat-7ETM+多光谱遥感数据,对研究区进行构造解译,羟基和铁染蚀变信息提取,结合区域地质和物化探异常特征,圈出7处遥感找矿远景区,远景区蚀变异常主要分布于侏罗纪雀莫错组及布曲组地层中,局部异常与侵入体及构造线关系密切,取得了较好的应用效果。

ChaXiaoma is located in the north slope of Tanggula Mountains in the southwest of Qinghai province,and the north-west end of the Sanjiang metallogenic belt.It has a good prospecting prospect.Using American landsat-7ETM+multispectral remote sensing data,structural interpretation,hydroxyl and iron stain alteration information extraction were carried out in the area.Combining regional geological and geophysical anomalies,seven remote sensing prospecting prospects have been identified.The distribution of alteration anomalies in the prospect area is mainly composed of the Quemocuo formation and Buqu formation in the Jurassic.The local anomaly is closely related to the distributions and tectonic lines.A good effect has been obtained.