Earth Science Frontiers ›› 2021, Vol. 28 ›› Issue (2): 19-34.DOI: 10.13745/j.esf.sf.2020.9.14

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Geochronological analysis of fossil landslides and improvement of dating accuracy

BAI Shibiao1,2(), CUI Peng2,*(), GE Yonggang2, WANG Hao3   

  1. 1. College of Marine Sciences and Engineering, Nanjing Normal University, Nanjing 210023, China
    2. CAS Key Laboratory of Mountain Hazards and Earth Surface Processes, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China
    3. Institute of Geographic Sciences and Natural Resource Research, Chinese Academy of Sciences, Beijing 100101, China
  • Received:2020-08-20 Revised:2020-08-31 Online:2021-03-25 Published:2021-04-03
  • Contact: CUI Peng

Abstract:

It is extremely useful to identify the ages and recurrence interval of giant fossil landslides for determining the conditions under which landslides occur and assessing landslide risk. It also helps to understand the Quaternary geological history of high mountainous areas. This paper reviews the current progress and achievements in landslide dating using geochronological methods. We introduce the principles and applicability of terrestrial cosmogenic nuclides (TCN), optically stimulated luminescence (OSL), and 14C, and discuss their advantages and limitations in landslide studies. We focus on the primary datable landslide materials and geomorphological features, such as the main scarp, sliding surface, slide shoulders, and landslide lakes. Furthermore, aiming at solving current problems in fossil landslide dating, some methods for improving dating accuracy are proposed.

Key words: landslide, chronology, optically stimulated luminescence, terrestrial cosmogenic nuclides, 14C dating

CLC Number: