气候变化领域集成服务门户(CCPortal): Stable oxygen and carbon isotope record from a drill core from the Hetao Basin in the upper reaches of the Yellow River in northern China and its implications for paleolake evolution

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DOI	10.1016/j.chemgeo.2020.119798
	Stable oxygen and carbon isotope record from a drill core from the Hetao Basin in the upper reaches of the Yellow River in northern China and its implications for paleolake evolution
	Li, Baofeng; Feng, Qi; Li, Yufeng; Li, Zaijun; Wang, Fei; Wang, Xin; Guo, Xiaoyan
发表日期	2020
ISSN	0009-2541
EISSN	1872-6836
卷号	557
英文摘要	Knowledge of the evolution of the paleolakes that developed intermittently within the Hetao Basin in northern China is important for understanding both the evolution of the upper and middle reaches of the Yellow River drainage system and the spatio-temporal evolution of regional water vapor transport associated with the East Asian summer monsoon. However, the long-term history of these lakes and the driving mechanisms are poorly understood. In this study, we reconstructed the history of the paleolakes within the Hetao Basin over the past similar to 1.68 Myr, based on delta O-18 and delta C-13 records from lacustrine authigenic carbonates in a 274.60-m-long drill core from the centre of the Hetao Basin. The absence of covariation of carbonate delta O-18 and delta C-13 during the intervals of similar to 1.47-1.30 Ma and similar to 1.17-1.07 Ma suggests the existence of a hydrologically-open lake system in the Hetao Basin. The relatively low and invariant carbonate delta O-18 values are similar to those of the modern Yellow River water, suggesting that the paleolakes formed when the lakes and the Yellow River were connected. The moderately high correlation (r = 0.61) of carbonate delta O-18 and delta C-13 during similar to 0.68-0.60 Ma suggests an intermittently open hydrology of the lake probably with a tendency towards closure within certain intervals. The low correlation during 0.47-0.28 Ma suggests a hydrologically open lake, while the relatively high delta O-18 values suggest a longer residence time of the lake water. The high correlation (r = 0.92) of carbonate delta O-18 and delta C-13 from similar to 0.28 Ma to the last interglacial suggests a hydrologically-closed lake, although the Yellow River may have flowed through the Hetao Basin at that time. The interaction of the tectonically-controlled relative height of the basin spill point and the climatically-driven sediment and water supply of the Yellow River was responsible for the long-term evolution of the paleolake within the Hetao Basin. Strong regional tectonic activity which induced the uplift of the eastern part of the Hetao Basin and Jinshan Gorge and raised the relative height of the spill point was the primary cause of the formation of a hydrologically-closed lake within the basin.
英文关键词	Hetao Basin; Lacustrine authigenic carbonate; Stable isotopes; Hydrological evolution; Yellow River
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS关键词	NE TIBETAN PLATEAU ; ULAN BUH DESERT ; SUMMER MONSOON ; INNER-MONGOLIA ; ENVIRONMENTAL-CHANGES ; LOESS PLATEAU ; WATER SOURCES ; LAKE QINGHAI ; TERRACES ; SEDIMENTS
WOS记录号	WOS:000589921700008
来源期刊	CHEMICAL GEOLOGY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239334
作者单位	[Li, Baofeng; Feng, Qi; Guo, Xiaoyan] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Lanzhou 730000, Peoples R China; [Li, Baofeng; Li, Zaijun; Wang, Fei; Wang, Xin] Lanzhou Univ, Minist Educ, Key Lab West Chinas Environm Syst, Lanzhou 730000, Peoples R China; [Feng, Qi; Li, Yufeng] Gansu Qilian Mt Natl Nat Reserve Adm, Zhangye 734000, Peoples R China
推荐引用方式 GB/T 7714	Li, Baofeng,Feng, Qi,Li, Yufeng,et al. Stable oxygen and carbon isotope record from a drill core from the Hetao Basin in the upper reaches of the Yellow River in northern China and its implications for paleolake evolution[J]. 中国科学院西北生态环境资源研究院,2020,557.
APA	Li, Baofeng.,Feng, Qi.,Li, Yufeng.,Li, Zaijun.,Wang, Fei.,...&Guo, Xiaoyan.(2020).Stable oxygen and carbon isotope record from a drill core from the Hetao Basin in the upper reaches of the Yellow River in northern China and its implications for paleolake evolution.CHEMICAL GEOLOGY,557.
MLA	Li, Baofeng,et al."Stable oxygen and carbon isotope record from a drill core from the Hetao Basin in the upper reaches of the Yellow River in northern China and its implications for paleolake evolution".CHEMICAL GEOLOGY 557(2020).