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	Very Large Cryoturbation Structures of Last Permafrost Maximum Age at the Foot of Qilian Mountains (NE Tibet Plateau, China): a Discussion
	Harris, Stuart A.1; Jin, Huijun2,3; He, Ruixia2
刊名	PERMAFROST AND PERIGLACIAL PROCESSES
	2017-10-01
卷号	28期号:4页码:757-762
关键词	Cryoturbation loadcasting age of the very cold last phase of the LGM Former buried ice blocks change from glaciation to permafrost NE Tibet Plateau
ISSN号	1045-6740
DOI	10.1002/ppp.1942
通讯作者	Harris, Stuart A.(harriss@ucalgary.ca)
英文摘要	Intensely cold conditions occurred during part of the last major glaciation of the mountains and Qinghai-Tibet Plateau in northeast China but their chronology is constrained by few limiting ages. At the Mengyuan section, on the northeastern margin of the Qilian Mountains, sandy silt provided three OSL ages that suggest deposition during a very cold, dry period in northeastern China between c. 29 and 19ka (early part of marine isotope stage (MIS) 2). Load-casting into the underlying outwash gravel occurred during climate amelioration. In some cases, the sandy silt infilled the spaces left by underlying thawing blocks of ice without collapse of the surrounding gravel. The gravel must therefore be older than c. 30ka and was probably deposited by outwash from glaciers on the higher parts of the Qilian Mountains during MIS 3. Included in them were buried contemporaneous or remnant blocks of glacial ice. Subsequently the surface became flat by unknown processes and was finally covered by a thin loess dating from 2.7ka, indicating it was deposited in the first warmer period in the Neoglacial sequence of events. Thus, the last major cold event spanned the period through isotope stages 2 and 3 in this area (57 to c. 19ka), during which the dominant effects of glaciation of the mountain tops were replaced by intensely dry, cold permafrost conditions for c. 10ka. Copyright (c) 2017 John Wiley & Sons, Ltd.
收录类别	SCI
WOS关键词	LATE-PLEISTOCENE
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geology
语种	英语
出版者	WILEY
WOS记录号	WOS:000413315700013
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2558018
专题	寒区旱区环境与工程研究所
通讯作者	Harris, Stuart A.
作者单位	1.Univ Calgary, Dept Geog, Calgary, AB T3A 1E4, Canada 2.Chinese Acad Sci, State Key Lab Frozen Ground Engn, Cold & Arid Regions Environm Res Engn Inst, Lanzhou, Gansu, Peoples R China 3.Harbin Inst Technol, Sch Civil Engn, Harbin, Heilongjiang, Peoples R China
推荐引用方式 GB/T 7714	Harris, Stuart A.,Jin, Huijun,He, Ruixia. Very Large Cryoturbation Structures of Last Permafrost Maximum Age at the Foot of Qilian Mountains (NE Tibet Plateau, China): a Discussion[J]. PERMAFROST AND PERIGLACIAL PROCESSES,2017,28(4):757-762.
APA	Harris, Stuart A.,Jin, Huijun,&He, Ruixia.(2017).Very Large Cryoturbation Structures of Last Permafrost Maximum Age at the Foot of Qilian Mountains (NE Tibet Plateau, China): a Discussion.PERMAFROST AND PERIGLACIAL PROCESSES,28(4),757-762.
MLA	Harris, Stuart A.,et al."Very Large Cryoturbation Structures of Last Permafrost Maximum Age at the Foot of Qilian Mountains (NE Tibet Plateau, China): a Discussion".PERMAFROST AND PERIGLACIAL PROCESSES 28.4(2017):757-762.

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