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本文根据我国境内及邻近地区地壳结构的分布特征,特别是近年来我国发生的几个大地震所处的深部地壳构造背景,讨论了地震孕育与发生的可能构造模式。结果表明,近代地震活动地带均为地壳厚度急剧变化的地带和地壳构造的转折交汇部位。在深部构造上又为上地幔顶部局部的隆起地区及邻近隆起地带的边缘或斜坡上。此外,地震发生的深部部位与重力场、磁力场的高梯度变化以及地壳中的低电阻层、低速层和高速层的分布密切相关。这种与地震有关的深部构造背景与地球物理场特征,是今后地震预报和地震成因研究必须十分重视的。
Based on the distribution characteristics of crustal structure in China and its adjacent areas, especially the deep crustal tectonic setting of several large earthquakes in our country in recent years, the possible tectonic modes of earthquake occurrence and occurrence are discussed. The results show that all the modern seismic activity zones are intersections of crustal and crustal structures with sharply changed crustal thickness. In the deep structure of the upper mantle again on the top of the uplift area and the adjacent uplift on the edge or slope. In addition, the deep parts of earthquakes are closely related to the gravitational field, the high gradient of magnetic field and the distribution of low resistivity layer, low velocity layer and high velocity layer in the crust. This kind of earthquake-related deep tectonic setting and geophysical field characteristics must pay great attention to the future earthquake prediction and earthquake genesis research.