从北华北盆地的地质结构看1976年唐山地震的发震机理

英文篇名：A discussion on the generating mechanism of 1976 Tangshan earthquake based on the geologic structure of northern Huabei Basin.
中文刊名：地学前缘
英文刊名：Earth Science Frontiers
作者：杨克绳 ; 胡平 ; 党晓春
英文作者：Yang Kesheng1 ; Hu Ping2 ; Dang Xiaochun31.Geophysical Research Institute of Bureau Geophysical Prospecting ; CNPC(China National Petroleum Corp.) ; Zhuozhou 072751 ; China2.Beijing Seismic Bureau ; Beijing 100080 ; China3.Bureau Geophysical Prospecting Research & Development Center ; Zhuozhou 072751 ; China
中文关键词：北华北盆地 ; 燕辽山字型构造 ; 唐山—丰南脊柱 ; 1976年唐山大地震
英文关键词：northern Huabei Basin ; Yanliao epsilon-shaped structure ; Tangshan-Fengnan backbone ; 1976 Tangshan earthquake
出版日期：2010-09-15
机构：中国石油集团东方地球物理勘探有限责任公司研究院;北京市地震局;东方地球物理勘探有限公司物探技术研究中心;
年：2010
期：05
出版单位：地学前缘

摘要

北华北盆地经过古近纪拉张、新近纪挤压形成了怀柔—三河—唐山—锦州—下辽河向南突出的弧形构造带,它与向南推挤的南北向唐山—丰南隆起一起构成燕辽山字型构造。唐山—丰南脊柱向南推挤造成弧顶挤压应力集中。一旦应力集中超过极限值,应力必然释放,形成大地震。文章从这一认识出发对1976年唐山地震的发震机理进行了探讨。
In the northern Huabei Basin,the Yanliao epsilon-shaped structure is composed of the Huairou-Sanhe-Tangshan-Jinzhou-Xialiaohe arcuate structure belt and the NS-trending Tangshan-Fengnan uplift that were formed by the Palaeogene extension and Neogene compression.The backbone of Tangshan-Fengnan uplift pushed southward and made the compressive stress concentrate at the apex of the arcuate structure belt.The stress would be released when it exceeded the limiting value,and caused the earthquake.It is the generating mechanism of 1976 Tangshan earthquake proposed in this paper.

引文

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