吐哈盆地地下水排泄构造的遥感探测与砂岩铀矿找矿勘查

RS-Based Exploration of Drainage Fault for Groundwater and Survey of Sandstone-Type Uranium Deposit in Turpan-Hami Basin

对吐哈盆地ETM遥感数据进行KT光谱空间变换处理,提取亮度指数、绿度指数和湿度指数。利用这些光谱指数图像对吐哈盆地地下水排泄构造进行识别,并结合基础地质研究成果对吐哈盆地进行大范围的水动力环境分析。研究表明,了墩隆起西部边缘存在一条区域性的北东东向地下水排泄构造,其东南方为斜坡带径流区域,该斜坡带连接鲁克沁-鄯善、七克台等大型西山窑组三角洲沉积单元和中天山广大高放射场蚀源区域,具有地浸砂岩铀矿找矿远景。文章同时指出,该地下水排泄构造的遥感探测技术可以直接应用于地下水资源寻找,这对于中国北方荒漠化地区社会经济发展具有现实意义。

With spectral enhancement of KT to ETM＋ data of Turpan-Hami basin, the indices of brightness, greenness and wetness were extracted out. These indices can be used to identify the drainage fault of groundwater and to analyze the hydrodynamic environment of Turpan-Hami basin combined with the result of basic geological research. The research shows that there is a regional drainage fault of groundwater trends toward NNE in the western of Liaodun uplift, an inclined ramp lies on the southeast of the fault, which connect Lukeqin-Shanshan and Qiketai delta sedimentation unit of Xishanyao group and high radiometric field of mid-Tianshan mountains together, there is a prospective to explore ISL sandstone-type uranium deposit in the ramp. The article also indicates that the technique can be used directly to explore the groundwater resource; this has realism significance to the development of society and economy in desert zone of northern China.