Preliminary results of long-term slip rates of 1999 earthquake fault by luminescence and radiocarbon dating |
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| Institution: | 1. Department of Geosciences, National Taiwan University, No. 1, Sec. 4th, Roosevelt Rd., Taipei 106, Taiwan, ROC;2. Department of Geography, Peking University, Beijing 100871, People''s Republic of China;3. Department of Earth Sciences, The University of Hong-Kong, Rm 309, James Lee Science Bldg, Pokfulam Rd., Hong Kong;1. Key Laboratory of Crustal Dynamics, China Earthquake Administration, Beijing 100085, China;2. Institute of Crustal Dynamics, China Earthquake Administration, Beijing 100085, China;3. China University of Geosciences (Beijing), Beijing 100083, China;4. Institute of Geology, China Earthquake Administration, Beijing 100029, China;1. L.F. Vereshchagin Institute for High Pressure Physics of the RAS, Troitsk, Moscow, Russia;2. GREMAN, UMR CNRS-7347, Université F. Rabelais, Tours, France;3. Department of Chemical and Biomolecular Engineering, University of Houston, Houston, TX, USA;1. Department of Diagnostics, Clinical and Public Health Medicine, University of Modena and Reggio Emilia, Modena, Italy;2. Association for Research in Psychiatry, Castelnuovo Rangone, Italy;3. Department of Mental Health, Local Health Agency, Modena, Modena, Italy;4. Human Resources, Department of Mental Health, Local Health Agency Reggio Emilia, Reggio Emilia, Italy;1. Institute of Statistics, National Central University, Chung-Li, Taiwan;2. Institute of Space Science, National Central University, Chung-Li, Taiwan |
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| Abstract: | For the purpose of deriving the long-term slip rates of different segments along the surface rupture of 1999 Chi-chi earthquake, radiocarbon and luminescence methods (TL and OSL) were applied to the tectonically influenced geomorphic features and deposits. We obtained six age estimates on pottery, driftwood and fluvial sediments. We found that the OSL signals of the samples collected from the coarse fluvial deposits had not been totally bleached due to rapid deposition. Based on the cumulative vertical offsets, the vertical slip rates were computed for each site. Our results reveal that the slip rate of the northern segment is relatively higher than that of the southern segment, which is consistent with the coseismic offsets that occurred in the 1999 earthquake. |
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