郯庐断裂带皖东段与滁河断裂构造及地震活动相关性研究

Correlation of Tectonics and Seismicity in Tancheng-Lujiang Fault Zone in East Anhui and Chuhe Fault

郯庐断裂带皖东段与滁河断裂所处区域 ,深、浅部构造特征及动力学环境相似 ,浅层构造均为断陷盆地 ,深部构造均为地幔异常区 ,浅层构造与深部构造之间呈镜象对应关系 ,说明两者构造具有成因上的联系。在郯庐断裂带皖东段与滁河断裂上 ,现代地震活动在时间和空间上具有明显的周期性、丛集性、迁移性及相关性 ,主要表现在 :每当郯庐断裂带皖东段地震活跃幕中主要地震丛 (ML≥ 3.0 )发生前后 13年 ,相应在滁河断裂带上也会发生类似级别的地震。

There are similar tectonic characteristics both in fleet and deep parts and similar dynamic environment in the area of Tancheng-Lujiang fault zone in east Anhui and Chuhe fault. There are same basin in fleet structure and mantal abnormality zone in deep structure, which shows a mirror-image relationship between fleet and deep structures, indicating the correlative cause of formation of the structures. Clear periodicity, clustering, migration and correlation appeared in time and space of modern earthquake activities between Tancheng-Lujiang fault zone in east Anhui and Chuhe fault. It appeared that corresponding similar-level earthquakes would occur in Chuhe fault 1~3 years before or after the main earthquakes cluster (M_L≥3.0) of seismicity episode appearred in Tancheng-Lujiang fault zone in east Anhui.