Pleistocene alluvial deposits dating along frontal thrust of Changhua Fault in western Taiwan: The cosmic ray exposure point of view

摘要: Abstract To tackle the history of active thrusts, it is necessary to open observation window on time scales order 104–105 years by studying surface morphologies resulting from their activities. Because fluvial systems are particularly sensitive recent environmental changes, geomorphic features such as alluvial terraces frequently used markers gauge tectonic deformation. Together with measurement cumulative displacements, chronological framework emplacement and abandonment these thus fundamental determine long-term fault slip-rates. In Taiwan, associated activity have been studied in detail a high level resolution; however, use deformed partially preserved often hampered absence well-documented ages. The purpose this paper two-fold. First, we take opportunity review constraints that published Taiwan so far. Second, present how cosmogenic dating method (in situ-produced 10Be) can be constraint deposits over Pleistocene scale. Thanks comparison our cosmogenic-derived ages existing data, consistent regional for Pakua–Tadu area along Changhua Fault, one most frontal thrusts Western Foothills mountain belt. We also discuss its relationships global eustatism implications timing propagation deformation front during last 450 kyr.