干旱区生态环境知识资源中心(Arid): Quaternary evolution of the Dunhuang paleolake and its controlling factors in the northeastern Tibetan Plateau

Arid

DOI	10.1016/j.geomorph.2023.108814
	Quaternary evolution of the Dunhuang paleolake and its controlling factors in the northeastern Tibetan Plateau
	Zheng, Jianlei; Zhang, Jinjiang; Zhang, Bo; Wang, Yang; Gu, Daxiang; Feng, Lin; Wang, Haibin
通讯作者	Zhang, JJ
来源期刊	GEOMORPHOLOGY
ISSN	0169-555X
EISSN	1872-695X
出版年	2023
卷号	438
英文摘要	Complex interactions between neotectonics, surface uplift, and climatic oscillations have been affecting the landscape and environmental evolution of the northeastern Tibetan Plateau since the late Cenozoic. The Dunhuang Basin, located at the northeastern frontier of the plateau, has undergone intensive deformation and desertification during the Quaternary, recording the coupling between the plateau's northward growth and associated environmental changes. Here we conduct an integrative study on the Quaternary fine-grained lacustrine deposits of the Dunhuang Basin including sedimentary observations, chronological determination, and climatic and provenance analyses. Our results reveal the existence of basin-scale paleolakes with two phases in the Dunhuang Basin during the Quaternary: (1) the paleo-South Lake, with sedimentary ages ranging from -1.16 to 0.41 Ma, is mainly exposed to the south of the Sanwei Shan and north of the Altyn Tagh Fault (ATF), and may have a further northward extension across the Sanwei Shan to the Bei Shan; (2) the paleo-West Lake developed later, with sedimentary ages of -18-9 ka, is situated to the north of the Sanwei Shan and south of the Bei Shan, and likely continued westwards to Lop Nur. Combining our new data with previous studies, we propose a model of propagating foreland basins to reveal the Quaternary evolution of the Dunhuang paleolake in the context of plateau growth. In this model, the Quaternary transpression of the ATF formed a foreland basin, which controlled the formation of the paleo-South Lake since -1.16 Ma. Subsequently, the plateau propagated from the ATF to the Sanwei Shan Fault (SWSF). The northward-thrusting SWSF caused the uplift of its southern wall, which forced the paleo-South Lake to migrate northwards, resulting in its drying up and the formation of the paleo-West Lake since -0.41 Ma. Finally, the combination of tectonic uplift and climate caused the drying up of the paleo-West Lake and the formation of the present-day desert landscape after -9 ka.
英文关键词	Northeastern Tibetan Plateau Quaternary Plateau growth Sedimentary record Structural deformation Paleolake evolution
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001041068200001
WOS关键词	ALTYN-TAGH FAULT ; WESTERN QAIDAM BASIN ; RESOLUTION MAGNETO STRATIGRAPHY ; RELICT LAKE DEPOSITS ; NW CHINA CONSTRAINTS ; NORTHERN QILIAN SHAN ; U-PB GEOCHRONOLOGY ; HEXI CORRIDOR ; TECTONIC UPLIFT ; CLIMATE-CHANGE
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396723
推荐引用方式 GB/T 7714	Zheng, Jianlei,Zhang, Jinjiang,Zhang, Bo,et al. Quaternary evolution of the Dunhuang paleolake and its controlling factors in the northeastern Tibetan Plateau[J],2023,438.
APA	Zheng, Jianlei.,Zhang, Jinjiang.,Zhang, Bo.,Wang, Yang.,Gu, Daxiang.,...&Wang, Haibin.(2023).Quaternary evolution of the Dunhuang paleolake and its controlling factors in the northeastern Tibetan Plateau.GEOMORPHOLOGY,438.
MLA	Zheng, Jianlei,et al."Quaternary evolution of the Dunhuang paleolake and its controlling factors in the northeastern Tibetan Plateau".GEOMORPHOLOGY 438(2023).