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Insights into rework mechanisms of glaciers on rock avalanche deposits in Pamir since the end of the late Pleistocene

Authors
/persons/resource/qingdong

Wang,  Qingdong
4.2 Geomechanics and Scientific Drilling, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Zhang,  Yingbin
External Organizations;

Peng,  Xinyan
External Organizations;

/persons/resource/wanglei

Wang,  Lei
4.2 Geomechanics and Scientific Drilling, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Yu,  Pengcheng
External Organizations;

Hu,  Bing
External Organizations;

Liu,  Jing
External Organizations;

Zeng,  Ying
External Organizations;

Buah,  Peter Antwi
External Organizations;

/persons/resource/bohnhoff

Bohnhoff,  M.
4.2 Geomechanics and Scientific Drilling, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

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Citation

Wang, Q., Zhang, Y., Peng, X., Wang, L., Yu, P., Hu, B., Liu, J., Zeng, Y., Buah, P. A., Bohnhoff, M. (2024 online): Insights into rework mechanisms of glaciers on rock avalanche deposits in Pamir since the end of the late Pleistocene. - Landslides.
https://doi.org/10.1007/s10346-024-02412-8


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5029624
Abstract
Glacial reworking of large rock avalanche sediment significantly contributes to glacial sediment transfer. This study presents two interaction models, derived from a comprehensive site investigation and numerical simulation, to elucidate the redistribution impact of glaciers on rock avalanche deposits. We examined the landforms of rock avalanche deposits subjected to glacial modification for over 14,000 years in Muztagh Ata, Kashgar, Xinjiang Province, China. To accurately capture the kinematic behavior of the glacier, we integrated the Glen flow law into the discontinuous deformation analysis (DDA) coupled with smoothed particle hydrodynamics (SPH) method. Temperature evolution was also considered as a critical input parameter of our models. We found that the region near the glacier source primarily experienced entrainment, while areas further away were characterized by expansion. Additionally, we systematically investigated the effects of temperature and stress exponent on the viscosity and movement distance of glaciers. Our study is expected to provide some valuable insights into the dynamics of glacier interactions with rock avalanche deposits, thereby enhancing understanding of their combined influence on landscape formation and sediment redistribution.