摘要
本文根据华北、扬子地台、青藏高原等地区的速度结构、介质特征、地震活动分布等特征,认为地壳中的低速层是在地壳中的弱化层,它与壳内低阻或高导层相对应,在地质构造上反映中地壳大型层间韧性剪切带,与地震活动的层状分布深度范围相对应,粘滑机制是壳内地震活动非常重要的机制,反映了岩石变形呈脆韧性过渡状态。
Based on studies of crustal velocity structure medium specific property, and earthquake distribution of North China, Yangtze Platform and Tibetan Plateau, this paper suggests that the low velocity layer is the weakened crustal layer in correspondence to the low-resistance or high-conductivity layer, representing the large-type ductile shear belt between layers. Its depth is relative to the depth of layered distribution of earthquake activities. Stick-slip mechanism is also important to earthquake activities in crustal, reflecting the brittle-ductile transitional deformation of rocks.
出处
《地质科技情报》
CAS
CSCD
北大核心
1992年第4期9-15,共7页
Geological Science and Technology Information
关键词
地壳
地震活动性
低速层
Crustal structure, low-velocity layer, earthquake activity, ductile shear belt, brittle-ductile transition, stick slip
