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논문 기본 정보

자료유형
학술저널
저자정보
Tong Zhao (Institute of Geology and Geophysics Chinese Acade) Wenjing Liu (Institute of Geology and Geophysics Chinese Acade) Zhifang Xu (Institute of Geology and Geophysics Chinese Acade) Taoze Liu (Institute of Geochemistry Chinese Academy of Scie) Sheng Xu (Scottish Universities Environmental Research Center UK) Lifeng Cui (Institute of Geochemistry Chinese Academy of Sciences) Chao Shi (University of Chinese Academy of Sciences)
저널정보
한국지질과학협의회 Geosciences Journal Geosciences Journal Vol.23 No.1
발행연도
2019.1
수록면
59 - 68 (10page)

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Both tectonics and climate affect surface erosion and change the landform. Long-term surface erosion rates determined by in situ produced cosmogenic nuclides are useful quantitative constraints for landform evolution in geological time scale. Measurements of cosmogenic 10Be and 26Al in the granitic rocks exposed in the Badain Jaran Desert, give a mean erosion rate of 7.3 ± 2.6 m/Ma, which is an order of magnitude higher than those reported in other extremely arid regions. Tectonic activity is supposed to be the first order control on regional erosion rate by comparing the 10Be erosion rates of arid regions with different precipitation ranges and tectonic activities worldwide. However the higher erosion rates in the Badain Jaran Desert compared with other arid regions within the stable tectonic background were attributed to the wind erosion and periodically warmer and wetter climate since late Pleistocene. Besides, the estimated eroded mass flux of 7.8 × 104 t/y suggests that erosion products of bedrocks in the Badian Jaran Desert only contribute minor desert deposits, which indicates massive exogenous materials input to the desert.

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