HR: 15:10h
AN: T43D-07 INVITED     [Abstracts]
TI: Non-destructive measurements of cores retrieved from TCDP Hole-B
AU: * Soh, W
EM: soh@jamstec.go.jp
AF: Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061 Japan
AU: Lin, W
EM: lin@jamstec.go.jp
AF: Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061 Japan
AU: Hirono, T
EM: hirono@jamstec.go.jp
AF: Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061 Japan
AU: Yeh, E
EM: yeh@jamstec.go.jp )1
AF: Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061 Japan
AU: Ito, H
EM: hisao.itou@aist.go.jp
AF: Center for Earth Exploration (CDEX), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 3173-25 Showa-machi, Kanazawa-Ku, Yokohama, 236-0001 Japan
AU: Kinoshita, M
EM: masa@jamstec.go.jp
AF: Institute for research on earth evolution (IFREE), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061 Japan
AU: Hashimoto, Y
EM: hassy@cc.kochi-u.ac.jp
AF: Kochi University, Akebonocyo 2-5-1, Kochi, 780-8520 Japan
AU: Murayama, M
EM: murayama@cc.kochi-u.ac.jp
AF: Kochi University, Akebonocyo 2-5-1, Kochi, 780-8520 Japan
AU: Lee, T
EM: tqlee@earth.sinica.edu.tw
AF: Institute of Earth Science, Academic Sinica, 128 Academia Road Sec. 2, Nankang, Taipei, 115 Taiwan
AU: Wang, C
EM: wangcy@cc.ncu.edu.tw
AF: Dept. of Earth Sciences, National Central University, Zhong Da Road 300, Chung-Li, 32054 Taiwan
AU: Ma, K
EM: fong@earth.ncu.edu.tw
AF: Dept. of Earth Sciences, National Central University, Zhong Da Road 300, Chung-Li, 32054 Taiwan
AB: In order to sharpen the knowledge of the rupture mechanism of 1999 Chi-Chi earthquake, Taiwan Chelungpu-fault Drilling Project (TCDP) was conducted. In the second drilling hole, Hole-B, continuous core samples were retrieved from the depth of 950-1350m. Three fault zones were encountered within the depth range of 1100-1300m. To obtain scientific evidences solving the mysterious mechanism of rupture propagation in northern area of the Chelungpu fault slipped during the earthquake, it is critical important to retrieve and to analyze the fault zone material from the depth at where the material undergone the faulting deformation at in-situ conditions of pressure and temperature. In addition, the situation of drilled core samples must be kept free from chemical change, evaporation of pore water, and of course mechanical shock during storage period of the core samples until they are used for analyzing and even during the analyzing. For example, we took X-ray CT images of the core samples which were sealed to prevent to contact with air (Oxygen). Thus, we can obtain better information about easy-oxidized minerals. Almost the core of total length 400m taken from the Hole-B is being used to do various non-destructive measurements in Kochi Institute for Cored Material Research, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Japan. Measurement items include optical and X-ray CT images, Multi-Sensor Core Logger (density, magnetic susceptibility, natural gamma ray, and color reflectance spectrum), XRF core logger (major component elements) etc. Preliminary results showed that the various physical and chemical parameters correlate well with the lithology. In addition, we observed some abnormalities of physical properties corresponding to the fault structure. We will give a presentation focused our hypothesis about the fault propagation mechanism, fault zone structure including preliminary analysis result of black gouge located at the center of fault zone, data integration of core measurement between the Hole-A and Hole-B, and core-logging integration etc.
DE: 7230 Seismicity and tectonics (1207, 1217, 1240, 1242)
DE: 8010 Fractures and faults
DE: 8102 Continental contractional orogenic belts and inversion tectonics
DE: 8150 Plate boundary: general (3040)
SC: Tectonophysics [T]
MN: Fall Meeting 2005