遥感技术在区域地质调查中的应用研究——以江西省1∶5万陀上幅区调应用为例

Application of the Remote Sensing Technology in Regional Geological Survey——A Case Study in Tuoshang,Jiangxi Province by 1: 50000

遥感技术的应用应贯穿区域地质调查的始终,要充分发挥遥感技术的先导与基础作用。在本研究区内,TM/ETM5、4、3波段组合为最佳波段组合,在常用的主成分变换法、乘积变换法、比值变换法、高通滤波法、小波变换法、IHS变换法6种融合方法中小波变换波段融合法为最佳融合方法。运用遥感影像更新区内的道路信息有助于提高填图效率和填图质量,以小波变换法融合全色波段的RGB(5,4,3)彩色影像为基础影像,其它彩色合成影像、单波段灰度影像等影像为辅助影像对区内岩石地层、构造进行了解译,运用复合法提取了本区的铁化和泥化蚀变异常,在野外地质路线观测过程中对解译的岩石地层、构造和提取的矿化蚀变都得到了较好的验证。遥感在区调过程中的道路更新、岩性识别、构造解译、矿化蚀变提取具有独特的优势。

The applying of remote sensing technology should through out the regional geological survey. In this survey, its leading and foundation role must be given full play. In this area, band TM/ETM5 ,4 ,3 colour combi nation is the best combination method. Among the 6 band merging methods which includes Principal Component Transform, Multiplicative Transform, Brovery Transform, High-Pass Filter, Wavelet transform and Intensity Hue Saturation , the Wavelet transform is the best one. The update of the road information by using of remote sensing image contributes to the improvement of efficiency and quality in map plotting. Litho-stratigraphies and structures are interpreted by using RGB （5, 4, 3 ） false color image which is merged by panchromatic band as basis image, the synthesis of another color images and grey images of the single band as assisting images. Iron alteration anoma- ly and argillization anomaly were extracted by using combining methods. In the meanwhile, the interpretation of the Litho-stratigraphies , structures and the extraction of mineralization were well proven. In a word, remote sens- ing technology has its unique advantages in updating route information, identifying rock natures, interpreting rock structures and extractin abnormal mineralization.