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DOI	10.1016/j.quaint.2014.04.016
	Holocene proglacial loess in the Ranwu valley, southeastern Tibet, and its paleoclimatic implications
	Zhang, Jifeng; Feng, Jin-Liang; Hua, Gang; Wang, Junbo; Yang, Yibo; Lin, Yongchong; Jiang, Tao; Zhu, Liping
通讯作者	Zhang, JF (通讯作者)
发表日期	2015
ISSN	1040-6182
EISSN	1873-4553
起始页码	9
结束页码	22
卷号	372
英文摘要	Glaciers and aeolian sediments are widespread on the Tibetan Plateau. Although glaciations have played an important role in the formation of loess in many glaciated regions in the Northern Hemisphere, proglacial loess on the Tibetan Plateau is rarely reported, and its origin, source, and paleoclimatic implications remain unclear. We have found a small area of proglacial loess deposits in the Ranwu valley, southeastern Tibet. Grain-size, geochemical and geomorphologic evidence, as well as observations of local dust storms, reveal that the outwash sediments of the Laigu glacier (similar to 30 km long) are the primary source for the local loess. We also found that the glacial wind from this glacier is the main transport vector, and thus speculate that the onset of the Ranwu loess, at ca. 6.6 ka, correlates with the early Neoglacial advance of the Laigu glacier, which generated glacial winds and local dust storms in the closed and deep-incised glacial valley. This is supported by the basal radiocarbon ages of two ice cores and a synthesis of Holocene glacial stadials on the Tibetan Plateau. Loess layers and paleoclimatic proxies indicate two drought stages at ca. 6.6-6 ka and ca. 2.9 ka to the present, corresponding to two well-documented weakened stages of the Indian Summer Monsoon. This study highlights that, although local aeolian sediments always cover a small area, they also have potential to record some clues of regional climate changes in some alpine regions. Much more detailed studies should be done to reveal their specific formation mechanisms and paleoclimatic implications. (C) 2014 Elsevier Ltd and INQUA. All rights reserved.
关键词	CHINESE LOESS LATE QUATERNARY AEOLIAN SEDIMENTS MAGNETIC-SUSCEPTIBILITY GEOCHEMICAL EVIDENCE EASTERN MARGIN NORTH-ATLANTIC CLIMATE-CHANGE ASIAN MONSOON PLATEAU
英文关键词	Proglacial loess; Glacier; Indian Summer Monsoon; Holocene; Tibetan Plateau
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000355674100003
来源期刊	QUATERNARY INTERNATIONAL
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258506
推荐引用方式 GB/T 7714	Zhang, Jifeng,Feng, Jin-Liang,Hua, Gang,et al. Holocene proglacial loess in the Ranwu valley, southeastern Tibet, and its paleoclimatic implications[J]. 中国科学院青藏高原研究所,2015,372.
APA	Zhang, Jifeng.,Feng, Jin-Liang.,Hua, Gang.,Wang, Junbo.,Yang, Yibo.,...&Zhu, Liping.(2015).Holocene proglacial loess in the Ranwu valley, southeastern Tibet, and its paleoclimatic implications.QUATERNARY INTERNATIONAL,372.
MLA	Zhang, Jifeng,et al."Holocene proglacial loess in the Ranwu valley, southeastern Tibet, and its paleoclimatic implications".QUATERNARY INTERNATIONAL 372(2015).