云南强震的动力探讨

本文应用近年来多种地球物理方法对东亚及云南地区应力场、地壳上地幔构造研究成果，探讨了造成云南多震及大震空间分布特征的动力来源。由于印度板块与亚欧板块的碰撞挤压及青藏高原的高差作用使高原物质向东漫流，受到扬子准古陆及华南地块的阻挡，于是沿其焊接边界应力集中产生大震。加之本、非稳态热、介质的化学组成及物理状态等因素的综合作用造就了云南大震的空间分布特征。

MOTIVE FORCE STUDY TO YUNNAN'S STRONG EARTHQUAKES

The authors have studied origin of motive force causing earthquakeprone and their spatial distribution in Yunnan Provice applying the results of multi-geophysical techniques to the stress field of East Asia and Yunnan,to crustal and upper mantle tectonics.The stress concerntration along their soldered boundaries leads to strong earthquakes due to slow-flow of plateau material to the east caused by level difference of Qinghai-Tibet plateau and collision between India and Eurasia plates against the Yangzi quasi-palaeoland and South China massif.Further.the comprehensive functions of water,non-stable heat,chemical components and physical status of media have contributed to the spatial distribution of Yunnan's strong earthquakes.