What is it about?
We compare Holocene (10 ka) uplift rates with present-day uplift rates: their similarity indicates aseismic deformation. The possible geological structure responsible for surface deformation is constrained using a geological cross-section. We propose classical fault-bend folding associated with a backthrust creeping at 2 cm/yr and possible pure shear in the anticline core. Published records from a deep well points to clay-rich lithology and elevated fluid content to favor aseismic slip.
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Why is it important?
We report a rarely observed case of steady aseismic deformation in the context of a fold-and-thrust belt, with a well-documented geological background. The proposed geometry for geological structures, slip mode, and slip rates have implications for seismic hazards in the region.
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This page is a summary of: Aseismic deformation within fold-and-thrust belts: example from the Tsengwen River section of southwest Taiwan, Geoscience Letters, December 2024, Springer Science + Business Media,
DOI: 10.1186/s40562-024-00373-3.
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