English  |  正體中文  |  简体中文  |  Items with full text/Total items : 26994/38795
Visitors : 2388087      Online Users : 32
RC Version 4.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Adv. Search
LoginUploadHelpAboutAdminister

Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/24775

Title: Identify and characterize the slip zone of the 1999 Chi-Chi Taiwan Earthquake
Authors: Song S.R.;Kuo L.W.;Yu A C.;Yeh E. C.;Song Y.F.;Chen H.F.;Ma K.F.
Contributors: NTOU:Institute of Applied Geosciences
國立臺灣海洋大學:應用地球科學研究所
Date: 2006
Issue Date: 2011-10-20T08:17:39Z
Publisher: 2006 Philadelphia Annual Meeting
Abstract: The activity of Chelungpu fault, induced the 1999 destructive Chi-Chi earthquake with magnitude Mw = 7.7, caused a total surface rupture of about 80-90 km long and the largest measured vertical offsets reaching as much as 5-9 m in west-central Taiwan. It provides geoscientific communities an opportunity to examine the behavior and mechanisms of large displacement faulting. The purpose of the Taiwan Chelungpu-fault Drilling Project (TCDP) is to obtain physical samples of the slip zone of 1999 Chi-Chi earthquake in the deep to make progress in understanding how mechanism of large displacement seismic faulting occurs. We have finished drilling the TCDP hole-A which it has the cuttings from 0 to 431.34 m and cores from 431.34 to 2003.26 m deep in the end of 2004. Meanwhile, the Hole-B with a branch was cored between 950 m to 1350 m in May, 2005. At least six fault zones have been identified in the cores. They are located around the depths of 1111 m, 1153 m, 1222 m, 1580 m, 1712 m and 1818 m. Based on the surface trail of rupture, regional geology, shallow seismic reflection, well logging, thermal measurement and core examinations, the fault zone of 1999 Chi-Chi earthquake may be occurred in the depth around 1111 m. It is composed of black and 12-cm thick ultracataclasites with slickenline as fault core, and asymmetric damage zone with 5 m thick in the hanging wall and 1 m thick in the footwall. Closed examination under the optical, scanning electron (SEM) and transmitted electron microscopies (TEM) on the black ultracataclasites shows less deformed structures with scarcity of microcracks and fresh glasses (pseudotachylyte). Those lines of evidence suggest that the slip zone of earthquake event was located in the depth of 1111.29 about 2 centimeters in thickness. Comparing the glassy morphology with the laboratory experiments on clay decomposition it suggests that the friction temperature may be up to 1100 °C during the seismic faulting. Furthermore, the frictional energy during the faulting of this event can be calculated.
Relation: 38(7), pp.413
URI: http://ntour.ntou.edu.tw/handle/987654321/24775
Appears in Collections:[應用地球科學研究所] 演講及研討會

Files in This Item:

There are no files associated with this item.



All items in NTOUR are protected by copyright, with all rights reserved.

 


著作權政策宣告: 本網站之內容為國立臺灣海洋大學所收錄之機構典藏,無償提供學術研究與公眾教育等公益性使用,請合理使用本網站之內容,以尊重著作權人之權益。
網站維護: 海大圖資處 圖書系統組
DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback