侯珍清, 向光中, 吕德微, 李素琴, 王多杰, 王华林. 1932年昌马7(1/2)级地震形变带基本特征及昌马地震成因探讨[J]. 华北地震科学, 1987, 5(1): 9-20.
引用本文: 侯珍清, 向光中, 吕德微, 李素琴, 王多杰, 王华林. 1932年昌马7(1/2)级地震形变带基本特征及昌马地震成因探讨[J]. 华北地震科学, 1987, 5(1): 9-20.
Hou Zhenqing, Xiang Guangzhong, Lu Dehui, Li Suqin, Wang Hualin, Wang Duojie. DISCUSSION ON BASIC FEATURES OF THE DEFORMATION ZONE AND GENESIS OF1932 CHANGMA EARTHQUAKE (Ms=7.5)[J]. North China Earthquake Sciences, 1987, 5(1): 9-20.
Citation: Hou Zhenqing, Xiang Guangzhong, Lu Dehui, Li Suqin, Wang Hualin, Wang Duojie. DISCUSSION ON BASIC FEATURES OF THE DEFORMATION ZONE AND GENESIS OF1932 CHANGMA EARTHQUAKE (Ms=7.5)[J]. North China Earthquake Sciences, 1987, 5(1): 9-20.

1932年昌马7(1/2)级地震形变带基本特征及昌马地震成因探讨

DISCUSSION ON BASIC FEATURES OF THE DEFORMATION ZONE AND GENESIS OF1932 CHANGMA EARTHQUAKE (Ms=7.5)

  • 摘要: 本文根据最新的现场考察结果,详细地讨论了1932年昌马7(1/2)级地震形变带的基本特征和昌马断裂最新活动特点。#br#昌马断裂是活动历史悠久,切割地壳较深,现今仍在活动的超岩石圈断裂。我们发现该断裂使一系列山脊和冲沟发生了明显逆时针方向错动,其水平错距可分为四级,反映了昌马断裂至少经历了四次活动,最后一次的水平错距为4.68米,很可能是1932年昌马地震时造成的。#br#昌马地震形变带比较清晰,其展布基本上与昌马断裂相吻合,形变带由地裂缝、鼓包和陡坎构成,并伴有滑坡和山崩现象。形变带组合关系的力学分析均显示了反时针错动,说明第四纪晚期昌马断裂是以左旋张扭性活动为特征。最后本文初步探讨了昌马地震成因模式。

     

    Abstract: According to the latest observation results in Chaugma earthquake district,this paper has in detail discussed basic features of the deformation Zone of Changma earthquake and the recent active characteristics of Changma fault.#br#The Changma fault that has a long active history and dissects deeper crust is an ultralithosph一eric one still active at present.The series of ridges and valleys were clearly dislocated in left-lateral way and their horizontal displacements which are divided into four sections indicate that four ftetivitities took place at least along the fauIt.The fourth section of the displacements is 4,68 meters which is probably the result of 1932 Changma earthquake.#br#The deformation Zone of Changma earthquake is relatively clear and basically extends along Changma fautt.The deformation zone consists of ground crack, drumlin and steep cliffs and was accompanied with landslide and slump,The anticlockwise movement showen by mechanical analysis Of the deformation Zone indicates left-lateral and tensile active characteristics of Changma fault Finaly, we studied the original model of Cchangma earthquake.

     

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