Paleoseimology deduced from the Fengyuan trench on the northern part of the Chelungpu Faultœªcentral Taiwan "Can example of very low angle reverse fault-

HR: 09:25h
AN: T11A-06 [PDF]
TI: Paleoseimology deduced from the Fengyuan trench on the northern part of the Chelungpu Faultœªcentral Taiwan "Can example of very low angle reverse fault-
AU: * Ota, Y
EM: ota@iceice.com
AF: Yokohama National University, 2-11-13-201, Minami-senzoku, Ota-ku, 1450068 Japan
AU: Shishikura, M
EM: m.shishikura@aist.go.jp
AF: Geological Survey of Japan/AIST, Central 7, 1-1-1, Higashi, Tsukuba, 3058567 Japan
AU: Watanabe, M
AF: Toyo University, 5-28-20, Hakusan, Bunkyo-ku, 1128606 Japan
AU: Sawa, H
AF: Tsuruoka National College of Technology, 104, Ioka, Tsuruoka, 9978511 Japan
AU: Yamaguchi, M
AF: Japan Broadcasting Corporation, 1-14-22,Obata, Moriyama-ku, Nagoya, 4630011 Japan
AU: Yanagida, M
AF: Hanshin Consultants Co. Ltd, 1-26, Higashiterao, Higashidai, Tsurumi-ku, Yokohama, 2300018 Japan
AU: Tanaka, T
AF: Hanshin Consultants Co. Ltd, 1-26, Higashiterao, Higashidai, Tsurumi-ku, Yokohama, 2300018 Japan
AU: Ichikawa, K
AF: Komazawa University, 1-23-1, Komazawa,, Setagaya-ku, 1548523 Japan
AU: Lee, Y
AF: Central Geological Survey, MOEA, Taiwan, 2-109, Chunghou, 23557 Taiwan
AU: Lu, S
AF: Central Geological Survey, MOEA, Taiwan, 2-109, Chunghou, 23557 Taiwan
AU: Shih, T
AF: Central Geological Survey, MOEA, Taiwan, 2-109, Chunghou, 23557 Taiwan
AB: We carried out the trenching and boring at the western margin of the lowest terrace, east of Fengyuan City, in order to know the nature and frequency of the faulting, on the northern part of the Chelungpu fault, central Taiwan. At this trench, we found that in addition to the 1999 earthquake fault which is characterized by the very low angle reverse fault with overturning of the younger strata, the penultimate earthquake event, which occurred between ca. 1400 yr BP and 2000 yr BP. The age of the lower part of the terrace gravel (Bed E) is ca. 4000 yr BP, thus two faulting events occurred during the past ca.4000 years. The amount of horizontal shortening and vertical displacement of the penultimate event are twice of those of the 1999 earthquake, supporting the presence of two events. The age of the penultimate earthquake at the Fengyuan site is the oldest record within the Chelungpu fault so far and suggests this part of the Chelungpu fault represents an independent segment from the central and southern part.
DE: 1242 Seismic deformations (7205)
DE: 7221 Paleoseismology
DE: 9320 Asia
SC: Tectonophysics [T]
MN: 2003 Fall Meeting