浙江江山地区地质影像特征

Remote Sensing Image Character of Geology in Jiangshan, Zhejiang Province

以1976年的航空相片为主要工作图像及1997年的陆地卫星TM图像为参考图像,研究了浙江江山地区岩石地层、地质构造的影像特征。对厘定的17个岩石地层单位,以上横塘、伍家弄、藕塘底三个典型地层剖面位置为样区,分析和总结了各地层单位的影像特征。实践证明,运用60、70年代的航空相片和90年代的陆地卫生TM图像资料,对当前江山地区植被覆盖度高、土壤发育或地形地貌复杂,地质工作者难以涉足的地区进行1∶5万区域地质填图,特别是填制"组图"具有明显的应用效果。通过对各种地质体影像特征的认真分析和总结,并结合野外实地检查验证,可在遥感图像上划分地层单元,勾绘地层界线和解译地质构造。这对加快我国1∶5万区域地质填图工作步伐,提高填图质量具有重要的实际意义。

The feature of an image of rock layer and geological structure is studied in Jiangshan city area, Zhe jiang province, by researching the aerial photograph of 1976 as main working image, the land satellite TM image of 1997 as reference. For the mark off 17 rocklayer units, the typical strata section of Shanghengtang, Wujianong and Otangdi are sample districts, we analyses and summarizes the image feature of each stratum unit. With the 1960s' aerial photograph and the land satellite TM image information, carries out 1∶50 000 mapping, especially for mapping the 'group map', having an obvious applicable effect in the area, which the vegetation coveres for current land region high, soil developing and the topography landforms complex, geological worker difficult to reach. Analyses and summarizes conscientiously,the various geological body features of image, combine the inspection of open country onthespot verify, may discern rockstraigraphic units, draw layer boundary and make explanation for geological structure on the image of remote sensing. It has important actual meaning for accelerating the working step of the 1∶50 000 scale regional geological mapping and improving the quantity of mapping.