干旱区生态环境知识资源中心(Arid): The Sources and Transport Dynamics of Eolian Sediments in the NE Tibetan Plateau Since 6.7 Ma

Arid

DOI	10.1029/2019GC008682
	The Sources and Transport Dynamics of Eolian Sediments in the NE Tibetan Plateau Since 6.7 Ma
	Li, Xiaomiao 1; Peng, Tingjiang 1; Ma, Zhenhua 1; Li, Meng 1; Li, Peiye 1; Feng, Zhantao 1; Guo, Benhong 1; Yu, Hao 1; Ye, Xiyan 1; Zhang, Jun 1; Song, Chunhui 2,3; Li, Jijun 1,4
通讯作者	Peng, Tingjiang
来源期刊	GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
EISSN	1525-2027
出版年	2020
卷号	21 期号:3
英文摘要	The red clay and loess-paleosol sediments of the Xiaoshuizi and Halagu planation surfaces of the northeastern Tibetan Plateau (TP) provide insights into the response of paleo-atmospheric circulation and surface processes to TP uplift and global climate changes. We present silicate Sr-Nd isotope compositions and bulk sediment grain-size parameters of the red clay and loess-paleosol sequences, with the aim of reconstructing changes in the transporting wind systems and sediment source regions. The results indicate that the red clay on the planation surface was transported mainly by the westerlies from the Tarim Basin and the Qilian Mountains, while the loess-paleosol sediments were transported mainly by the East Asian winter monsoon (EAWM) from the Badain Jaran Desert, Tengger Desert, and Qaidam Basin. These shifts in transport mechanism and source were likely related to major changes in the topography of the TP and the expansion of Northern Hemisphere glaciation since the Middle Pliocene. In addition, we reconstructed the evolution of the paleo-atmospheric circulation from the Late Miocene to the Middle Pliocene. During the Late Miocene, both the paleo-EAWM and East Asian summer monsoon (EASM) were weak, and westerly winds dominated the climate of the study area. During the Early Pliocene, both the paleo-EAWM and EASM exerted an increasing influence on the study area. We ascribe the slight enhancement of the paleo-EAWM to the gradual growth of the northern TP and the significant enhancement of the paleo-EASM to global climate changes. Key Points A major transition in the sediment source and transport dynamic of eolian sediments on the NE TP occurred between the red clay and the overlying loess deposits From the Pliocene onward, the paleo-EAWM and EASM were intensified and exerted an increasing influence on the XSZ planation surface The contribution of the CAO to the XSZ red clay showed an increasing trend from the Late Miocene to the Middle Pliocene
英文关键词	NE Tibetan Plateau red clay Late Miocene-Pliocene paleo-EAM westerly circulation
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000534469900006
WOS关键词	RED CLAY DEPOSITS ; CHINESE LOESS PLATEAU ; RESOLUTION MAGNETO STRATIGRAPHY ; GRAIN-SIZE DISTRIBUTION ; EAST-ASIAN MONSOON ; LATE MIOCENE ; ISOTOPIC VARIATIONS ; FORELAND BASIN ; QAIDAM BASIN ; QILIAN SHAN
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
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/2XILL650/318888
作者单位	1.Lanzhou Univ, MOE Key Lab Western Chinas Environm Syst, Coll Earth & Environm Sci, Lanzhou, Peoples R China; 2.Lanzhou Univ, Sch Earth Sci, Lanzhou, Peoples R China; 3.Lanzhou Univ, Key Lab Western Chinas Mineral Resources Gansu Pr, Lanzhou, Peoples R China; 4.Nanjing Normal Univ, Coll Geog Sci, Nanjing, Peoples R China
推荐引用方式 GB/T 7714	Li, Xiaomiao,Peng, Tingjiang,Ma, Zhenhua,et al. The Sources and Transport Dynamics of Eolian Sediments in the NE Tibetan Plateau Since 6.7 Ma[J]. 兰州大学,2020,21(3).
APA	Li, Xiaomiao.,Peng, Tingjiang.,Ma, Zhenhua.,Li, Meng.,Li, Peiye.,...&Li, Jijun.(2020).The Sources and Transport Dynamics of Eolian Sediments in the NE Tibetan Plateau Since 6.7 Ma.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,21(3).
MLA	Li, Xiaomiao,et al."The Sources and Transport Dynamics of Eolian Sediments in the NE Tibetan Plateau Since 6.7 Ma".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 21.3(2020).