Geochronometria

, Volume 40, Issue 4, pp 360–367

ESR geochronology of the Minjiang River terraces at Wenchuan, eastern margin of Tibetan Plateau, China

  • Chun-Ru Liu
  • Gong-Ming Yin
  • Hui-Ping Zhang
  • Wen-Jun Zheng
  • Pierre Voinchet
  • Fei Han
  • Duo Wang
  • Wei-Juan Song
  • Jean-Jacques Bahain
Research Article

DOI: 10.2478/s13386-013-0129-2

Cite this article as:
Liu, CR., Yin, GM., Zhang, HP. et al. Geochron (2013) 40: 360. doi:10.2478/s13386-013-0129-2
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Abstract

The Minjiang River terrace along the Longmen Shan fault zone near Wenchuan, at the eastern margin of the Tibetan Plateau, China, provides archives for tectonic activity and quaternary climate change. However, previous studies were not able to provide ages older than 100 ka due to the limitations of dating material or/and methods applied to date the fluvial sediments. In this study, we used the ESR signal of the Ti-Li center in quartz to obtain the ages of four higher terraces (T3–T6). According to the results, the terraces T3 to T6 were formed at 64±19 ka, 101±15 ka, 153±33 ka, and 423±115 ka, respectively. Combined with previous studies, these results indicate that the formations of all terraces correspond to glacial/interglacial transition periods, such as, T1-T5 being correlated to MIS2/1, MIS4/3, MIS5d/5c, and MIS6/5e respectively, while T6 probably to MIS12/11. According to these data, it is found that the average incision rate was significantly higher over the last 150 ka than that previous 100 ka (250 to 150 ka). As both tectonics and climate have affected the formation of these terraces, in addition to the overall uplifting of Tibetan Plateau, the regional uplift due to isostasy would be an additional tectonic factor in the formation of river terraces in the eastern margin of Tibetan plateau.

Keywords

river terrace ESR dating quartz Minjiang River Tibetan plateau 

Copyright information

© Versita Warsaw and Springer-Verlag Wien 2013

Authors and Affiliations

  • Chun-Ru Liu
    • 1
  • Gong-Ming Yin
    • 1
  • Hui-Ping Zhang
    • 1
  • Wen-Jun Zheng
    • 1
  • Pierre Voinchet
    • 2
  • Fei Han
    • 1
  • Duo Wang
    • 1
    • 3
  • Wei-Juan Song
    • 1
    • 3
  • Jean-Jacques Bahain
    • 2
  1. 1.State Key Laboratory of Earthquake Dynamics, Institute of GeologyChina Earthquake AdministrationBeijingChina
  2. 2.Département de Préhistoire, Muséum National d’Histoire NaturelleUMR7194 du CNRSParisFrance
  3. 3.Schools of the Earth Science and ResourceChina University of GeosciencesBeijingChina