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First cosmic ray exposure dating (in situ produced 10Be) of the late pleistocene and holocene glaciation in the Nanhutashan Mountains (Taiwan)

Abstract : In Taiwan, efficient climate-driven strong erosion processes are the leading cause for low preservation of geomorphic landforms. Despite the absence of present-day glaciers, glacial relicts have been reported in high altitude areas. These scarce landforms provide opportunities for reconstructing the timing of the last deglaciation in a region where glacial history is poorly documented. We have collected boulders and striated bedrocks in the Nanhutashan area and calculated surface exposure ages based on in-situ produced 10Be concentrations. The oldest glacial remains, dated at 11.1 ± 3.3 ka, correspond to the last glacial advance. The Holocene is characterized by a continuous retreat of the ice-cap until at least 7.2 ± 1.0 ka. Our results are in agreement with a scenario where changes of monsoon regimes lead to a strong reduction of the winter monsoon during the early Holocene, causing a decrease of snow supply and disequilibrium of the hydrological budget.
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https://hal-insu.archives-ouvertes.fr/insu-00253988
Contributor : Pascale Talour <>
Submitted on : Wednesday, February 13, 2008 - 12:27:39 PM
Last modification on : Monday, October 12, 2020 - 11:10:18 AM

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Julien Carcaillet, Lionel Siame, H.-T. Chu, D. Bourles, W.-C. Lu, et al.. First cosmic ray exposure dating (in situ produced 10Be) of the late pleistocene and holocene glaciation in the Nanhutashan Mountains (Taiwan). Terra Nova, Wiley-Blackwell, 2007, 19, pp.331-336. ⟨10.1111/j.1365-3121.2007.00756.x⟩. ⟨insu-00253988⟩

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