HR: 0800h
AN: T11D-1316    [Abstracts]
TI: FAULT DETECTION USING RESISTIVITY IMAGE PROFILING METHOD AT HSINCHU SCIENCE INDUSTRIAL PARK, HSINCHU, TAIWAN
AU: * LIU, H
EM: 92642007@cc.ncu.edu.tw
AF: HSING CHANG LIU, 10F No.30, Lane 227, Houliao 2nd Rd., Zhongli, 320 Taiwan
AB: As Taiwan is located in the Neotectonic belt along the western Pacific Ocean, the detection of active faults is important for earthquake risk analysis. In addition, some active faults in Taiwan lie typically at the bases of urban or industrial area, their identification is often challenging because of environment changes and interferences, etc. The Hsinchu Science Industrial Park (HSIP), Hsinchu, N.W. Taiwan is one of the most important high technology sites in Taiwan. Based on previous geophysical and geologic surveys, the well-known active Hsinchen fault is crossed the site, although the exact location of active fault zone remains unclear. Different geophysical methods are used to detect an active fault. However, a successful recognition of a fault depends on the physical properties such as density contrast, acoustic impedance, and reisitivity contrast, etc. of the target and its surroundings. Due to a large resistivity contrast between the hanging wall (low resistivity Choulan shale) and the footwall (high resistivity Toukoshan gravel beds) of the Hsinchen fault, geoelectrical sounding may be one of the best ways to trace this fault. For the above reasons, the resistivity image profiling method was used to investigate the fault and also attempted to relate these DC resistivity measurements to the fault parameters. Correlated the electrical and fault parameters is one of the most important tasks for this study. All of the field measurements to be discussed were made during the period of 2000 to 2003. A portable resistivity meter used to make all resistivity measurements. Electrode spread was pole-pole arrays. Combined the RIP sounding results to the local topographic maps, geologic data and formal open pits information, fault zones are being recognized. Keywords: active fault; resistivity change; Hsinchen fault; Taiwan
DE: 8010 Fractures and faults
SC: Tectonophysics [T]
MN: 2004 AGU Fall Meeting