云南人工地震测深P＿g子波及结晶基底特征研究

SEISMIC P_g SUB-WAVE AND STUDY OF CRYSTALLINE BASEMENT FEATURES IN ARTIFICAL EARTHQUAKE SOUNDING IN YUNNAN

本文应用地震子波理论和方法对云南两次大规模人工地震测深资料进行研究。结果表明，思茅和江川测区地质结构复杂，基底的动力学特征变化很大。思茅基底呈不完整的断块。江川北西方向６０公里范围内，不稳定的基底中存在个别较为完整的块体。景谷以南４０公里以内，基底的动力学特征变化较大，４０—４５公里段存在断层或破碎带。下关和景云桥测区基底的动力学特征相对稳定，红河断裂和澜沧江断裂在该两处浅部的反映是微弱的。

In this paper, the theory and method of seismic sub-wave are used to approach the data from artificial earthquake sounding conducted twice in Yunnan. The results are showed as follows: There are complex geological structure and striking variation characteristics of basement dynamics in Simao and Jiangchuan surveying regions and uncomplete fault blocks appear in the Simao basement; The relatively complete individual blocks exist in the unstable basement within 60 km northwest of Jiangchuan; There is complex dynamic structure of basement within 40 km south of Jinggu and fault or fracture zone exists within 40-45 km south of it; And in Xiaguan and Jing Yunqiao surveying regions, dynamic structure of basement is relatively stable and no obvious relection of the Honghe and Lan Cangjiang faults is found in shallow layer of the two surveying regions.