苏鲁皖地区晚新生代构造应力场的初步探讨

• 作 者: 方仲景 向宏发 丁梦林 计凤桔 汤有标
• 机 构: 国家地震局地质所,国家地震局地质所,国家地震局地质所,国家地震局地质所,安徽省地震局
• 出 处: 地震地质
• 发表日期: 1979年04期
• 关键词: 晚新生代 构造应力场 震源机制 地震断层 北东东 地壳 地形变 挤压作用 正断层 中生代

据考察区的晚新生代断裂活动性质和结合地震断层、地震应变带、震源机制、地形变、地壳测深等资料的综合分析,认为本区与华北北部的晚新生代应力场既有一致性,又有本身特点。推论是近邻诸板块相向挤压作用和伴随的深部物质运动而导致地壳上部侧向运动等不同级次作用力复杂叠加的结果。指出它与中生代区域应力场不同。

According to the activity characteristics of the Late Cenozoic faults in the study area and the comprehensive analysis of seismic faults, seismic strain zones, focal mechanism, topographic changes and crustal sounding, the late Cenozoic stress fields in this area and North China are both consistent , But also has its own characteristics. Corollary is the result of complex superimposition of different levels of forces, such as the opposing extrusion of adjacent plates and the accompanying deep-sea material movement, which leads to the lateral crust upper movement. It is different from the Mesozoic regional stress field.