干旱区生态环境知识资源中心(Arid): Late Quaternary loess accumulation at the Rudak section in Uzbekistan, central Asia: Chronology and palaeoclimate implications

Arid

DOI	10.1016/j.palaeo.2020.109695
	Late Quaternary loess accumulation at the Rudak section in Uzbekistan, central Asia: Chronology and palaeoclimate implications
	Zhang, Jingran; Zhou, Xinying; Long, Hao
通讯作者	Long, H
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
EISSN	1872-616X
出版年	2020
卷号	547
英文摘要	Many studies have been carried out to understand the nature of the loess formation and its palaeoenvironmental significance in different parts of Eurasia, especially Europe and China. However, in spite of its key position, our knowledge about the loess deposits at the core of the Eurasian loess belt in central Asia is still limited, particularly in terms of absolute dating. This study presents a new luminescence chronology of a loess-palaeosol sequence (Rudak section) in the vicinity of the Gissar Range, Uzbekistan, using both quartz optically stimulated luminescence dating and polymineral post-IR IRSL dating techniques. The dating results suggested a loess accumulation history over the past 180 kyr at Rudak section, characterized by a great depositional hiatus during the entire last glacial period, likely owing to too harsh climate conditions for favouring dust accretion and loess preservation in the piedmont areas of central Asia. Hence, contrasting with the traditional concept of continuous (quasi-continuous) deposition of loess, the direct stratigraphical correlation might be problematic for climatic interpretation of loess-palaeosol sequence in this area. Furthermore, magnetic susceptibility of Rudak section demonstrated the moisture peaks in phase with ice-volume minima over the glacial and interglacial cycles, indicating moisture variation in the Westerlies-dominated central Asia was broadly consistent with that in monsoonal Asia on orbital timescales, but nearly contrasting picture with each other on the suborbital timescales, at least through the Holocene epoch. The Westerlies-dominated central Asia has generally experienced a dry first half and a wet second half of the Holocene, which has likely been driven by solar insolation gradients between mid-latitudes and high-latitudes as well as the melt-water flux.
英文关键词	Dust accumulation Luminescence dating Sedimentary hiatus Moisture variations Westerlies
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000528206600010
WOS关键词	ARID CENTRAL-ASIA ; HOLOCENE MOISTURE EVOLUTION ; CHINESE LOESS ; PALEOSOL SEQUENCE ; LATE PLEISTOCENE ; HIGH-RESOLUTION ; ILI BASIN ; MAGNETIC-PROPERTIES ; NORTHERN CHINA ; TIAN-SHAN
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向	Physical Geography ; Geology ; Paleontology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324355
作者单位	[Zhang, Jingran] Nanjing Normal Univ, Jiangsu Ctr Collaborat Innovat Geog Informat Reso, Sch Geog, Key Lab Virtual Geog Environm, Nanjing 210023, Peoples R China; [Zhang, Jingran; Long, Hao] Chinese Acad Sci NIGLAS, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Peoples R China; [Zhou, Xinying] Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China; [Long, Hao] CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Jingran,Zhou, Xinying,Long, Hao. Late Quaternary loess accumulation at the Rudak section in Uzbekistan, central Asia: Chronology and palaeoclimate implications[J],2020,547.
APA	Zhang, Jingran,Zhou, Xinying,&Long, Hao.(2020).Late Quaternary loess accumulation at the Rudak section in Uzbekistan, central Asia: Chronology and palaeoclimate implications.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,547.
MLA	Zhang, Jingran,et al."Late Quaternary loess accumulation at the Rudak section in Uzbekistan, central Asia: Chronology and palaeoclimate implications".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 547(2020).