川滇构造带及其邻区的地壳结构与地震分布

CRUSTAL STRUCTURE AND EARTHQUAKE DISTRIBUTION OF THE TECTONIC ZONE IN EASTERN SICHUAN AND WESTERN YUNNAN PROVINCES

综合前人资料分析了川—滇构造带及其邻区地壳－上地幔速度结构与地震分布的关系。结果表明，川—滇构造带具有同青藏高原地壳－上地幔结构相似的某些特征；地震活动主要沿安宁河断裂带和小江断裂带分布。震源以永仁、渡口和会理三地所在区域最浅。

In this paper, the date of predecessors has been used to analyse relation between the structure of the crust-upper mantle and earthquake distribution in tectonic zone of western Sichuan and eastern Yunnan provinces. The results show that some characteristics of crust-upper mantle structure of tectonic zone of western Sichuan and eastern Yunnan provinces are similar to Qinghai-Xizang plateau. The earthquake active mainly distributes along the An'ning River fault zone and Xiaojiang fault zone. Its hypocenter in the field of Yongren, Dukou and Huili is more shallow than its circumference.