密云水库北部变质岩构造遥感图像特征的研究

A Study On The Features Shown In The Remote SensingImage From The Metamorphic terrain InNorthern Miyun District,Beijing

密云水库北部是以前震旦纪变质岩系为主分布地区。该区变质岩系的褶皱和断裂构造十分复杂,长期以来一直没有得到统一认识。通过对该区航空像片和卫星像片等遥感图象特征的研究,使本区变质岩构造的形态特征、分布。

The folding and faulting patterns in a metamorphic terrain are very complex. As a result from the study on the remote sensing image from Miyun District,the authors have found that there are 3 structural layers and two unconformities within the district, as shown in the images bydefferent textures, as Well as by different geomorphic peculiarities & drainage patterns reflecting the differences in metamor-phism, composition, structural superposition and sequences of the metamorphic rocks. The field observations fit well with the above interpretations. So the images are helpful in studying the structural evolution of the metamorphic rocks. According to the characteristics shown in the images, the ancient structure extend in a E-W direction, so do the metamorphic iron belts in general, but in so far as the metamorphic rocks had been superposed by NE tectogenesisther efore, the occurrene of the iron belts are controlled by a combined folding structure in Ew&NE directions towhich the exploration should be followed.