南北地震带中段地震活动的板块动力学研究  

STUDY ON PLATE DYNAMICS OF SEISMICITY AT CENTRAL SEGMENT OF N-S EARTHQUAKE BELT

作　　者：张先[1] 赵丽[1] 刘敏[1] 沈京秀 陈秀文[1] 虎喜风 

机构地区：[1]国家地震局地球物理勘探中心,郑州450003

出　　处：《华北地震科学》1996年第4期11-18,共8页North China Earthquake Sciences

基　　金：国家地震局地震科学联合基金会的资助

摘　　要：在大陆造山带研究的最新成果基础上论述了南北地震带中段地壳的动力演变过程,结合造山带内部的高温韧性滑脱构造及地球物理深部探测成果和新生代以来的板块运动探讨了南北地震带中段地震的地壳动力学过程及成因机制.论述了在印度洋板块与欧亚板块碰撞所产生的大区域一级构造应力场及陆块与扬子板块碰撞所产生的二级构造应力场的作用下,南北地震带中段地区不同的陆块缓慢地相对运动,地震活动乃是地壳形变达到临界时不同陆块间相对运动的动力作用的反映.On the basis of recent researth results about erogenic zone, the dynamic evolution process of the crust of the central segment of N -S earthquake belt is discussed in this paper . In combination of high temperature ductile decollement of the erogenic zoue inteiror with deep geophysial exploratiun results and plate movements since Neozoic era, the crustal dynamic process and genetic mechanism for earthquake belt are approached . In the present paper the authors also discuss the relative movements of different landmasses along N -S earthquake belt , which were caused under the actions of the first -order regional tectonic stress caused by collision of Indian Plate with Eurasia plate, and of the secondary tectonic stress caused by collision of Qing - Zang Plateau with Yangtzi Plate . Earthquake activities are the mirror of dynamic effect from a relative movements of different landmasses when the crustal deformation reaches critical value .

关 键 词：地震带 地震活动性 板块构造 动力学 

分 类 号：P315.2[天文地球—地震学] P542.4[天文地球—固体地球物理学]