SEISMOLOGY AND GEOLOGY ›› 2002, Vol. 24 ›› Issue (3): 400-411.

• Brief Report • Previous Articles     Next Articles

AN ANALYSIS OF TECTONIC ENVIRONMENT AND CONTEMPORARY SEISMICITY OF FRONTAL OROGENY IN CENTRAL TAIWAN AREA

CHENG Kuei-hsiang   

  1. Kao Yuan Institute of Technology, Integrated Research Laboratory on Prevention of Seismic Hazard, Kaohsiung, Taiwan, China
  • Received:2001-05-09 Revised:2002-05-30 Online:2002-09-04 Published:2009-10-26

台湾地区强震发生的构造环境与地震活动性分析

郑魁香   

  1. 高苑技术学院土木系地震与震害预测研究室, 高雄, 821
  • 作者简介:郑魁香,1956年出生,1995年在中央大学土木工程研究所获得博士学位,美国斯坦福大学地震工程中心访问学者,现为高苑技术学院土木工程系副教授,目前从事地震预测、地震灾害预测、地震地质构造与轨道科技等方面的研究,电话:886-7-6968121,E-mail:khcheng@cc.kyit.edu.tw.

Abstract: The central part of Taiwan area shows an arcuate thrust tectonics. Every arcuate belt is composed of a series of varying scales of sub arcs, which appear as a separate fold and thrust belt with independent characteristics of geometry, kinematics and mechanics and a self similar system as well. The kinematics of arc changes from thrusting on the top of the arc to the oblique thrusting and wrenching at the sections, and finally thrusts to the bottom of the arc. The arcuate thrust tectonics is composed of frontal, lateral and oblique ramps at depth. Each earthquake deformation belt is related to the independent arc. Strong earthquakes correspond to the large-scale arcs, and medium earthquakes to the small ones, and even to the smaller sub arcs. Finally, the mapping analysis is carried out between the contemporary seismicity and the space area of the arcuate thrusting tectonic system in the central part of Taiwan area, especially on strong Chi-Chi aftershock series.

Key words: arcuate zone, active tectonic zone, seismic activity, aftershock series

摘要: 台湾中部造山带前缘呈现为一弧形逆冲构造体系,每个弧形带分别由多个不同尺度但各自独立的次级弧形构造组成,而每一个弧形构造都有其各自独立的几何学、运动学和动力学特征,是典型的褶皱-逆冲带,但同时各个次级弧形构造间却又有自相似特性.在对台湾中部地区弧形逆冲构造体系的空间位置与地震活动间的关系分析基础上,归纳出中部弧型逆冲地震带的地震活动特征,以台湾东西地震区的构造划分和北部、中部与南部不同的弧陆构造现象,描述了台湾地区的近代地震活动(1900年以来的100年间)与现代地震地质构造的关系.

关键词: 弧形带, 活动构造带, 地震活动性

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