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| 題名: | Pleistocene alluvial deposits dating along frontal thrust of Changhua Fault in western Taiwan: The cosmic ray exposure point of view |
| 作者: | 康竹君;Siame, Lionel L.;Chen, Rou-Fei;Derrieux, Florence;Lee, Jian-Cheng;Chang, Kuo-Jen;Bourlès, Didier L.;Braucher, Régis;Léanni, Laetitia;Kang, Chu-Chun;Chang, Chung-Pai;Chu, Hao-Tsu |
| 貢獻者: | 地球科學學院地球科學系 |
| 關鍵詞: | Active tectonics;Alluvial deposits;Cosmogenic nuclides;Sciences of the Universe;Seismic hazards |
| 日期: | 2012-06-02 |
| 上傳時間: | 2026-04-23 18:20:48 (UTC+8) |
| 出版者: | Elsevier Ltd.;Elsevier Ltd |
| 摘要: | 摘要： To tackle the history of active thrusts, it is necessary to open the observation window on time scales on the order of 104–105 years by studying the surface morphologies resulting from their activities. Because fluvial systems are particularly sensitive to recent environmental changes, geomorphic features such as alluvial terraces are frequently used as markers to gauge tectonic deformation. Together with the measurement of cumulative displacements, the chronological framework of emplacement and abandonment of these geomorphic markers is thus fundamental to determine long-term fault slip-rates. In Taiwan, the geomorphic features associated with fault activity have been studied in detail with a high level of resolution; however, the use of deformed and partially preserved alluvial terraces is often hampered by the absence of well-documented ages. The purpose of this paper is two-fold. First, we take the opportunity to review the chronological constraints that have been published in Taiwan so far. Second, we present how the cosmogenic dating method (in situ-produced 10Be) can be used to constraint the chronological framework of alluvial deposits over a Pleistocene time scale. Thanks to a comparison of our cosmogenic-derived ages with existing data, we present a consistent regional chronological framework for the Pakua–Tadu area along the Changhua Fault, one of the most active frontal thrusts in the Western Foothills of the Taiwan mountain belt. We also discuss its relationships with global eustatism and its tectonic implications for the timing of propagation of the deformation front during the last 450kyr.
出版者： Elsevier Ltd
出版日期： 2012-06-02
出處： Journal of Asian earth sciences, 2012-06, Vol.51, p.1-20
資源來源： Elsevier ScienceDirect Journals Complete - Autoholdings
版權： 2012 Elsevier Ltd
版權： CC0 1.0 - Universal
識別號： ISSN: 1367-9120
識別號： EISSN: 1878-5786
識別號： DOI: 10.1016/j.jseaes.2012.02.002 |
| 顯示於類別: | [地球科學學系] 期刊論文
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