STUDY ON <sup>26</sup>Al EXPOSURE DATING OF FENG'ANSHAN LANDSLIDE IN THE MIDDLE REACHES OF BAILONG RIVER

SHU Jie; BAI Shibiao; CUI Yu; CHEN Qian; ZHANG Zhigang; WANG Jian

Volume 23 Issue 6

Dec. 2017

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SHU Jie, BAI Shibiao, CUI Yu, et al., 2017. STUDY ON 26Al EXPOSURE DATING OF FENG'ANSHAN LANDSLIDE IN THE MIDDLE REACHES OF BAILONG RIVER. Journal of Geomechanics, 23 (6): 914-922.

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SHU Jie, BAI Shibiao, CUI Yu, et al., 2017. STUDY ON ²⁶Al EXPOSURE DATING OF FENG'ANSHAN LANDSLIDE IN THE MIDDLE REACHES OF BAILONG RIVER. Journal of Geomechanics, 23 (6): 914-922.

SHU Jie, BAI Shibiao, CUI Yu, et al., 2017. STUDY ON 26Al EXPOSURE DATING OF FENG'ANSHAN LANDSLIDE IN THE MIDDLE REACHES OF BAILONG RIVER. Journal of Geomechanics, 23 (6): 914-922.

Citation:

SHU Jie, BAI Shibiao, CUI Yu, et al., 2017. STUDY ON ²⁶Al EXPOSURE DATING OF FENG'ANSHAN LANDSLIDE IN THE MIDDLE REACHES OF BAILONG RIVER. Journal of Geomechanics, 23 (6): 914-922.

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STUDY ON ²⁶Al EXPOSURE DATING OF FENG'ANSHAN LANDSLIDE IN THE MIDDLE REACHES OF BAILONG RIVER

SHU Jie^{1
,
,},
BAI Shibiao^{1, 2, 3, 4
,},
CUI Yu¹,
CHEN Qian¹,
ZHANG Zhigang^{1, 2, 3, 4},
WANG Jian^{1, 2, 3, 4}

1.
School of Geopraphy Science, Nanjing Normal University, Nanjing 210023, Jiangsu China
2.
Key Laboratory of Virtual Geographic Environment(Nanjing Normal University), Ministry of Education, Nanjing 210023, Jiangsu China
3.
State Key Laboratory Cultivation Base of Geographical Environment Evolution(Jiangsu Province), Nanjing 210023, Jiangsu China
4.
Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, Jiangsu China

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Received: 2017-05-06
Published: 2017-12-01

Abstract

Abstract

Knowledge about the formation age and reactivation times of paleo-landslide are critical for landslide hazard assessment and management. With the development of AMS technology, cosmogenic nuclide dating method has been effectively applied in determining the formation age of paleo-landslide. In this study, the Feng'anshan landslide, which is located at the middle reaches of Bailong River in Southeast Gansu Province, was taken as the study target. Two rock samples, Fas-2 and Fas-1, were obtained from the landslide scarp and a block below the scarp respectively. Considering the masking factors and erosion rate of the sampling site, we calculated the ²⁶Al age of the landslide by using the method of ²⁶Al exposure dating with the cosmic nuclide. The main conclusions are as follows:(1) Two landslide events occurred at about 0.72~0.75 ka and 2.26~2.65 ka respectively. The latter formation age corresponds to the documented year of 186 BC in historical descriptions, when earthquakes induced the landslide. (2) The erosion rate has more impact on the dating results of samples with old ages.
- Feng'anshan landslide,
- cosmogenic nuclide dating,
- age of the landslide event,
- erosion rate

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References(47)

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