Heavy mineral assemblages and sedimentation rates of eastern Central Asian loess: Paleoenvironmental implications

doi:10.1016/j.palaeo.2020.109747

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	Heavy mineral assemblages and sedimentation rates of eastern Central Asian loess: Paleoenvironmental implications
	Cheng, Liangqing 1,2,3; Song, Yougui1,2 ; Chang, Hong1,2 ; Li, Yun 4; Orozbaev, Rustam 5,6; Zeng, Mengxiu 7; Liu, Huifang 1
通讯作者	Song, Yougui(ygsong@loess.llqg.ac.cn)
	2020-08-01
发表期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
卷号	551 页码:12
摘要	Central Asian loess deposits record the evolution of aridification across the Asian interior. However, paleoclimatic proxies are strongly influenced by the variation of the dust source and accumulation process. In order to decipher the paleoenvironmental changes, a sensitive paleoclimatic proxy with clear source and accumulation process will be needed. In this study, heavy mineral assemblages and sedimentation rates were investigated in a 30-kyr loess section in the Ili Basin, Xinjiang, northwestern China. During Marine Isotope Stage (MIS) 2, trends in dust sedimentation rate were similar to those of the Chinese Loess Plateau (CLP), in anti-phase with Northern Hemisphere Summer Insolation (NHSI) at 65 degrees N. Amphibole/epidote ratios (contents and mean grain size) were low during cold phases, such as the late Last Glacial Maximum (LGM) and Heinrich Event (H) 1; their ratios were higher during adjacent warm periods; this was attributed to aeolian sorting during transportation. Namely, greater sorting between amphibole and epidote occurred in warmer phases, and weaker sorting occurred in colder phases. The amphibole/epidote ratio could serve as a proxy for wind intensity, and thus the Siberian High (SH) intensity. Amphibole/epidote ratio was a more appropriate proxy to record wind intensity than dust sedimentation rate which was also influenced by sediment availability. A higher amphibole/epidote ratio corresponded to a more negative East Asian stalagmite delta O-18, indicating an anti-phase relationship between the SH and East Asian Summer Monsoon (EASM) during the MIS 2.
关键词	Amphibole Epidote Grain size Siberian High East Asian Summer Monsoon
DOI	10.1016/j.palaeo.2020.109747
关键词[WOS]	GRAIN-SIZE DISTRIBUTION ; LAST GLACIAL MAXIMUM ; CHINESE LOESS ; PALEOSOL SEQUENCE ; YELLOW-RIVER ; ENVIRONMENTAL-CHANGES ; TIBETAN PLATEAU ; TIEN-SHAN ; ILI BASIN ; MIS 2
收录类别	SCI ; SCI
语种	英语
资助项目	National Basic Research Program of China[2016YFA0601902] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB40000000] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB26000000] ; Natural Science Foundation of China[41977385] ; Second Tibetan Plateau Scientific Expedition and Research program[2019QZKK0101]
WOS研究方向	Physical Geography ; Geology ; Paleontology
项目资助者	National Basic Research Program of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research program
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号	WOS:000537682600007
出版者	ELSEVIER
引用统计	被引频次：18[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/14857
专题	古环境研究室第四纪科学与全球变化卓越创新中心
通讯作者	Song, Yougui
作者单位	1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 2.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Qinghai Inst Salt Lakes, Qinghai Prov Key Lab Geol & Environm Salt Lake, Xining 810008, Qinghai, Peoples R China 5.Natl Acad Sci Kyrgyz Republ, Inst Geol, Bishkek 720040, Kyrgyzstan 6.Amer Univ Cent Asia, Appl Geol Dept, Bishkek 720060, Kyrgyzstan 7.Zhejiang Normal Univ, Coll Geog & Environm Sci, Jinhua 321004, Zhejiang, Peoples R China
推荐引用方式 GB/T 7714	Cheng, Liangqing,Song, Yougui,Chang, Hong,et al. Heavy mineral assemblages and sedimentation rates of eastern Central Asian loess: Paleoenvironmental implications[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2020,551:12.
APA	Cheng, Liangqing.,Song, Yougui.,Chang, Hong.,Li, Yun.,Orozbaev, Rustam.,...&Liu, Huifang.(2020).Heavy mineral assemblages and sedimentation rates of eastern Central Asian loess: Paleoenvironmental implications.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,551,12.
MLA	Cheng, Liangqing,et al."Heavy mineral assemblages and sedimentation rates of eastern Central Asian loess: Paleoenvironmental implications".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 551(2020):12.