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Gelifluction in the alpine periglacial environment of the Tianshan Mountains, China

Author

Listed:
  • Liu Gengnian
  • Xiong Heigang
  • Cui Zhijiu

Abstract

Gelifluction in the periglacial zone of the Tianshan Mountains occurs at 2500‐3600 m above sea level on north‐facing slopes. Abundant groundwater, fine grained sediments and slopes 10°‐30° favour gelifluction. Most gelifluction forms are lobate, a few are tongue‐shaped. The mean surface rate of movement is 11.14cm/a; the front advancing rate is 1.86cm/a. The moving rate in the middle part is greater than at the sides of gelifluction lobes, the mean rates being 3.1 cm/a and 0.86cm/a, respectively. La gélifluxion dans la zone périglaciaire des montagnes de Tianshan se produit à 2500 m au dessus du niveau de la mer sur les pentes exposées au N. L'abondance d'eau dans le sol, des sédiments de granulométrie fine ainsi que des pentes de 10 à 30° favorisent ce processus. La majorité des formes de gélifluxion sont des lobes mais il existe aussi des langues. La vitesse moyenne du déplacement est de 11,4cm par an; la vitesse d'avancée du front étant de 1,86 cm par an. La vitesse est plus grande dans la partie centrale des lobes et moindre à proximité des cǒtés, les vitesses moyennes étant respectivement en ces deux endroits de 3,1cm par an et de 0,86cm par an.

Suggested Citation

  • Liu Gengnian & Xiong Heigang & Cui Zhijiu, 1995. "Gelifluction in the alpine periglacial environment of the Tianshan Mountains, China," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 6(3), pages 265-271, July.
    • Handle: RePEc:wly:perpro:v:6:y:1995:i:3:p:265-271
    DOI: 10.1002/ppp.3430060308
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