气候变化领域集成服务门户(CCPortal): Highly dynamic rock glaciers of tien shan

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DOI	10.21782/KZ1560-7496-2017-4(58-74)
	Highly dynamic rock glaciers of tien shan
	Galanin A.A.; Olenchenko V.V.; Khristoforov I.I.; Severskiy E.V.; Galanina A.A.
发表日期	2017
ISSN	15607496
卷号	21 期号:4
英文摘要	A comprehensive study based on electrical resistivity tomography and GPR methods, geothermal monitoring and the stable isotopes analysis of glacial runoff has found that the most active frontal parts of Gorodetsky rock glacier in Northern Tien Shan are thawed and substantially free of ground ice. Fast moving frontal parts of Gorodetsky rock glacier are composed by a mixture of coarsely fragmented debris, cores of metamorphosed ice and thixotropic sand-And clay-loamy filler. The fi ne-graded component results from the glacial runoff infiltration and accumulates in the pores and voids of rock glacier, leading to a gradual change in its physical properties (volume density, plasticity). Dynamics of such rock glaciers does not obey Glen's law for viscous flow, while the presence of ground ice does not exert any significant effect on their inner deformations and velocities. Rheology of such landforms can probably be modelled according to the behavior of pseudoplastic (non-Newtonian) fluids and thixotropic systems. The lichenometry and Schmidt Hammer Test data provided a basis for establishing four different age generations of rock glaciers. These generations correlate well with the Late Holocene oscillations of mountain glaciers in the Northern Tien Shan, which bears clear evidence of strong historical and genetic relationships between common glaciers and rock glaciers.
英文关键词	Alpine permafrost; Central Asia; Electrical resistivity tomography; Glacial mudflow; Glen's law; Ground penetrating radar; Lichenometry; Rock glaciers; Schmidt hammer test; Tien-shan
学科领域	alpine environment; electrical resistivity; ground penetrating radar; Holocene; lichenometry; mudflow; permafrost; rock glacier; tomography; Tien Shan
语种	英语
scopus关键词	alpine environment; electrical resistivity; ground penetrating radar; Holocene; lichenometry; mudflow; permafrost; rock glacier; tomography; Tien Shan
来源期刊	Earth's Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119491
作者单位	Melnikov Permafrost Institute, SB RAS, 36, Merzlotnaya str., Yakutsk, 677010, Russian Federation; Institute of Petroleum Geology and Geophysics, SB RAS, Academican Koptuga Ave., Novosibirsk, 630090, Russian Federation; Northeastern Federal University, 58, Belinskogo str., Yakutsk, 677000, Russian Federation
推荐引用方式 GB/T 7714	Galanin A.A.,Olenchenko V.V.,Khristoforov I.I.,et al. Highly dynamic rock glaciers of tien shan[J],2017,21(4).
APA	Galanin A.A.,Olenchenko V.V.,Khristoforov I.I.,Severskiy E.V.,&Galanina A.A..(2017).Highly dynamic rock glaciers of tien shan.Earth's Cryosphere,21(4).
MLA	Galanin A.A.,et al."Highly dynamic rock glaciers of tien shan".Earth's Cryosphere 21.4(2017).