Seismotectonic model of the Tainan basin, southwestern Taiwan

University of Taipei > 理學院 > 應用物理暨化學學系暨碩士班 > 期刊論文 > Item 987654321/2598

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题名:	Seismotectonic model of the Tainan basin, southwestern Taiwan
作者:	林明聖蕭謙麗
贡献者:	臺北市立教育大學自然科學系
关键词:	Tainan basin seismotectonic model Chianan plain Taiwan Strait Ichu fault strike-slip fault
日期:	2004
上传时间:	2009-07-28 11:23:28 (UTC+8)
摘要:	Thanks to the destructive earthquakes of 1906, 1941, 1946, 1994 and 1999, we have obtained an up-to-date movement picture to understand the seismotectonics of the Tainan basin more fully. This picture is simply a new version of the surface trace of the dextrally mobile Ichu fault, which is of unparalleled importance in the present-day tectonization of southwestern Taiwan. We have learned from the picture that the well-known Meishan fault and Hsinhwa fault are not independent seismogenic fault themselves but particularly active segment of the Ichu fault.The source location of the 16 September 1994 Taiwan Strait earthquake is near the western boundary of Tainan basin. The source mechanism of this event consistently shows a pure normal faulting with striking approximately E-W. It indicated that normal faulting processes induced from the shear of dextral strike-slip faults are active in the historically subsiding Tainan basin. Also found in the same picture is a fault-framed earthquake swarm in which the epicenter of the main shock and many aftershocks of the 1941 and 1999 event were concentrated. Plus, this swarm of the parallelogram shape is structurally a typical contractional strike-slip duplex freshly built up at a double restraining bend of the Ichu fault. All of the above and some other details support our longtime believe that the Ichu fault has been the powerful tectonic motor responsible for the sideways crustal movements in, and the resultant high seismicity of, southwestern Taiwan.
關聯:	地震學報(英文版)ACTA SEISMOLOGICA SINICA, 17(4), P.315.2
显示于类别:	[Department of Applied Physics and Chemistry] Periodical Articles

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