遥感图像处理在沂沭断裂带中段预测金伯利岩靶区的应用

鲁西大型环形构造中心是金刚石原生矿床的产地，笔者近来对其东缘又解译出一大型环形构造，并对其进行了卫星图像的计算机处理。文章针对山东含矿金伯利岩的光谱图像特征，设计一套增强、提取与金伯利岩有关的构造、光谱异常电算处理程序．经对处理后的图像的详细解译与已知矿床的对比分析，确定了与金伯利岩有关的靶区6个，对其中2个靶区野外验证以及重砂、岩石化学、REE分析表明，马陈埠小环形体内所发现的后陈埠碳酸岩脉，可能是强烈碳酸岩化的金伯利岩。

APPLICATION OF LANDSAT IMAGE PROCESSING IN PROGNOSTICATING KIMBERLITE TARGETS IN THE MIDDLE SECTOR OF THE YI-SHU FAULT ZONE

The middle sector of the Yi-Shu fault zone is one of the most important areas of primary diamond deposits in China. On the basis of an analysis of the geological structure and geographic features of the region, the author, accord in to the spectral features of the diamond bearing kimberlites in Shandong Province, worked out some computer programs and processed the Landsat image of the middle sector of the Yi-Shu fault zone with the I2PS101 system. Because of reasonable programming , the processing of the Landsat image has enhanced geographic features and extracted some image abnormities in colour and characteristics, which are related to kimberlites. By analyzing the geological and geophysical data from the region, the authors have distinguished six kimberite-related target areas. In the field work, the authors found some carbonatite veins in one of the target areas. By subsequent field verification and petrochemical, REE and heavy placer mineral analysis indicate that the veins are of hypogenic carbonatites. The analysis of heavy placer minerals show that the veins contain some chromian pyropes moissanites and montmorillonites. It is said that in such veins some diamond grains were discovered in the past. For this reason, the authors consider that the carbonatite veins may be an intensely carbonatitized kimberlite.