气候变化领域集成服务门户(CCPortal): Causation and mechanism of magnetic susceptibility trend in Upper Miocene–Pliocene red clay deposits of the eastern Chinese Loess Plateau

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DOI	10.1016/j.palaeo.2020.110014
	Causation and mechanism of magnetic susceptibility trend in Upper Miocene–Pliocene red clay deposits of the eastern Chinese Loess Plateau
	Zhao G.; Han Y.; Liu X.; Lü B.; Chen Q.; Zhang R.; Ma J.; Li H.; Zhao J.
发表日期	2020
ISSN	0031-0182
卷号	560
英文摘要	The Upper Miocene–Pliocene red clay deposits of the Chinese Loess Plateau (CLP), like the overlying Quaternary loess, have recorded abundant paleoclimatic evolution information. In this study, we found that the variation in the magnetic susceptibility of seven sections across a north–south climate gradient in the eastern CLP exhibited an oscillatory upward trend. Prior to this research, much less was known about the causation and mechanism of this trend. Among the seven sections, the Jiaxian and Duanjiapo sections are located in the northernmost and southernmost of the climatic gradient, respectively. These representative sections were therefore selected to investigate the causation and mechanism of the aforementioned trend using magnetic measurements. The results were as follows. (1) The absolute and relative content of fine-grained ferrimagnetic minerals displayed an oscillatory upward increasing trend in both of the red clay sequences, which was the primary reason for the susceptibility increase in fluctuations. (2) The absolute content of antiferrimagnetic minerals was nearly equivalent in each red clay sequence. (3) Based on the combination of the results of present study and previous study findings, we found that the weathering and pedogenesis intensity of the red clay sequence showed an oscillatory upward trend during 7–2.6 Ma, which was closely linked with the strengthened East Asian summer monsoon in oscillations. These findings are probably the main cause for the oscillatory upward increasing fine-grained ferrimagnetic minerals in Upper Miocene–Pliocene red clay sequence. Further, this is likely the mechanism for the oscillatory upward increase of χ in the red clay sequence. © 2020 Elsevier B.V.
英文关键词	Causation; Chinese Loess Plateau; Increasing trend; Magnetic susceptibility; Mechanism; Red clay
语种	英语
scopus关键词	clay; climate oscillation; deposition; loess; magnetic susceptibility; paleoclimate; pedogenesis; Pliocene; trend analysis; China; Jiaxing; Loess Plateau; Zhejiang
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150297
作者单位	Henan Key Laboratory for Synergistic Prevention of Water and Soil Environmental Pollution, School of Geographic Sciences, Xinyang Normal University, Xinyang, Henan 464000, China; Key Laboratory for Subtropical Mountain Ecology (Ministry of Science and Technology and Fujian Province Funded), College of Geographical Sciences, Fujian Normal University, Fuzhou, Fujian 350007, China; Department of Environment and Geography, Macquarie University, Sydney, NSW 2019, Australia; College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, Zhejiang, 321004, China
推荐引用方式 GB/T 7714	Zhao G.,Han Y.,Liu X.,等. Causation and mechanism of magnetic susceptibility trend in Upper Miocene–Pliocene red clay deposits of the eastern Chinese Loess Plateau[J],2020,560.
APA	Zhao G..,Han Y..,Liu X..,Lü B..,Chen Q..,...&Zhao J..(2020).Causation and mechanism of magnetic susceptibility trend in Upper Miocene–Pliocene red clay deposits of the eastern Chinese Loess Plateau.Palaeogeography, Palaeoclimatology, Palaeoecology,560.
MLA	Zhao G.,et al."Causation and mechanism of magnetic susceptibility trend in Upper Miocene–Pliocene red clay deposits of the eastern Chinese Loess Plateau".Palaeogeography, Palaeoclimatology, Palaeoecology 560(2020).