干旱区生态环境知识资源中心(Arid): Magnetic, granulometric and geochemical characterizations of loess sections in the eastern Arid Central Asia: Implication for paleoenvironmental interpretations

Arid

DOI	10.1016/j.quaint.2020.01.003
	Magnetic, granulometric and geochemical characterizations of loess sections in the eastern Arid Central Asia: Implication for paleoenvironmental interpretations
	Li, Guanhua; Xia, Dunsheng; Lu, Hao; Wang, Youjun; Jia, Jia; Liu, Xianbin; Yang, Xiaoqiang
通讯作者	Xia, DS
来源期刊	QUATERNARY INTERNATIONAL
ISSN	1040-6182
EISSN	1873-4553
出版年	2020
卷号	552 页码:135-147
英文摘要	Loess deposits in the Arid Central Asia (ACA) contain sensitive messages concerning the evolution of the Westerlies and the interior aridification of Asia. In this study, we conducted a combined study of geophysical and geochemical characterization on loess sections in the eastern ACA, to discuss possible paleoclimate development since the late Pleistocene Era. Results show that the ACA loess chiefly exhibited similar geophysical and geochemical compositions with loess deposits in other regions, like the Chinese Loess Plateau. There are various accumulation rates that would have been responsible for the depositional difference within the ACA loess profiles. In addition, there are three magnetic responses to the bulk grains and geochemical proxies in this study. At the bottom segment of the section, magnetic enhancement was associated with coarse grain sizes and water leaching. Magnetic enhancement responded to stronger pedogenesis and moderate paleo-wind intensity in the uppermost parts. Moreover, there is a transitional segment in the middle part of the section, characterized by inordinately detrital inputs and weak pedogenic contributions. Thus, it may be better to evaluate the magnetic climatology of the ACA loess through different depositional stages. Furthermore, this study generally reveals that the paleoclimate pattern in the ACA was probably characterized by relatively low moisture during warm intervals, and vice versa, in the middle and bottom parts of the profiles. But relatively enhanced moisture was indicated during the Holocene period. Further studies are still necessary to obtain reliable proxies and chronology for a detailed paleoclimate interpretation of the ACA loess.
英文关键词	Loess Paleoclimate Rock magnetism Grain size major element The arid central asia
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000573017600006
WOS关键词	GRAIN-SIZE DISTRIBUTION ; OXYGEN-ISOTOPE RECORD ; CHINESE LOESS ; PALEOSOL SEQUENCES ; TIANSHAN MOUNTAINS ; TEMPERATURE-DEPENDENCE ; PALEOCLIMATIC RECORDS ; CLIMATE-CHANGE ; LEVEL STATUS ; SUSCEPTIBILITY
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326522
作者单位	[Li, Guanhua; Yang, Xiaoqiang] Sun Yat Sen Univ, Dept Earth Sci & Engn, Southern Lab Ocean Sci & Engn Guangdong, Zhuhai 519000, Guangdong, Peoples R China; [Li, Guanhua; Xia, Dunsheng; Lu, Hao; Wang, Youjun; Jia, Jia; Liu, Xianbin] Lanzhou Univ, Coll Earth & Environm Sci, MOE Key Lab Western Chinas Environm Syst, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Li, Guanhua,Xia, Dunsheng,Lu, Hao,et al. Magnetic, granulometric and geochemical characterizations of loess sections in the eastern Arid Central Asia: Implication for paleoenvironmental interpretations[J]. 兰州大学,2020,552:135-147.
APA	Li, Guanhua.,Xia, Dunsheng.,Lu, Hao.,Wang, Youjun.,Jia, Jia.,...&Yang, Xiaoqiang.(2020).Magnetic, granulometric and geochemical characterizations of loess sections in the eastern Arid Central Asia: Implication for paleoenvironmental interpretations.QUATERNARY INTERNATIONAL,552,135-147.
MLA	Li, Guanhua,et al."Magnetic, granulometric and geochemical characterizations of loess sections in the eastern Arid Central Asia: Implication for paleoenvironmental interpretations".QUATERNARY INTERNATIONAL 552(2020):135-147.