滇西滇中地区的构造活动性

根据卫星图像研究滇西滇中地区的断裂活动性，并结合水系分析，揭示东西赂主流水系与南北向、南东向非水流水系的分水岭以及金沙江、珠江水系的分水岭是重要的构造活动带。该区１０次７级以上地震，有８次发生在这些分水岭附近的活动断裂上。

TECTONIC ACTIVITY IN THE WESTERN ANDCENTRAL PART OF YUNNANPROVINCE,CHINA

Based on the comprehensive Interpretation of 10 sheets with 53 satellite photos in different time phases and wave bands, the fault activities in the western and central parts of Yunnan Province have been investigated.According to their features on the satellite images,the faults in this region can be divided into two types.The first type fault was active during the period of the Holocene,while the second type was active during the period of the Pleistocene.In combination with the analysis of the drainage system,it reveals that the drainage divide between the E-W-trending main stream system and the S-N-to SE-trending tributary system,and the drainage divide of the Zhujiang River are the important active tectonic zones.Over 7 magnitude earthquakes have occurred in this region for ten events,amount them 8 events occurred along the active tectonic zones near the drainage divides.