Preservation and transportation of large landslide deposits under decadal and millennial timescales in the Taiwan orogenic belt

Chen, Chan-Mao; Shyu, J. Bruce H.; Tsui, H. K.; Hsieh, Yao‐Ching

doi:10.1016/j.geomorph.2022.108402

Cited by 2 publications

(1 citation statement)

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“…As an ongoing orogen that is only a few million years old, the majority of the island is still undergoing rapid tectonic deformation and uplift, and the river systems on the island are also actively adjusting their shapes with the structural activities (e.g., Chen et al, 2015; Yanites et al, 2010). Drainage reorganizations have been observed to occur across various river basins in Taiwan (e.g., Giletycz et al, 2015; Willett et al, 2014), often due to frequent landslide events that sometimes breach the drainage divide (e.g., Dahlquist et al, 2018) and may have a prolonged effect on the drainage systems (e.g., Chen et al, 2020, 2022; DeLisle et al, 2022). Moreover, many previous studies pointed out that the collision is progressing southward (e.g., Suppe, 1981, 1984; Teng, 1990; Shyu, Sieh, & Chen, 2005; Shyu, Sieh, Chen, & Liu, 2005; Fellin et al, 2017; Chen et al, 2021), with the northern part of the orogen formed earlier and more mature.…”

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confidence: 99%

Structural control on drainage pattern development of the western Taiwan orogenic wedge

Chen

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Willett

et al. 2023

Earth Surf Processes Landf

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Structural control on drainage patterns has long been suggested to play an important role in the development of fluvial systems, including their map pattern. Along the western Taiwan orogenic wedge, a prominent drainage pattern change is present, from predominantly orogen parallel drainages in the south to river systems that flow perpendicular to the long axis of the mountain belt in the north. Such change likely reflects the temporal evolutionary process as the Taiwan orogen propagates southward. We propose that the flow direction change of river systems is produced by the development of the fold‐and‐thrust belt on the pro‐wedge side of the mountain belt and is facilitated by drainage reorganization that includes abrupt drainage captures and more gradual divide movements, permitting drainage basins to attain a geometrically stable configuration with time. Our observations in Taiwan demonstrate not only how tectonic uplift is effective at modifying river patterns in the early stages of orogenic development but also how time and increased stream power encourage river networks to adjust to more effective patterns in mature mountain belts.

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