气候变化领域集成服务门户(CCPortal): Marinoan-aged red beds at Shennongjia; South China: Evidence against global-scale glaciation during the Cryogenian

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DOI	10.1016/j.palaeo.2020.109967
	Marinoan-aged red beds at Shennongjia; South China: Evidence against global-scale glaciation during the Cryogenian
	Bai H.; Kuang H.; Liu Y.; Peng N.; Chen X.; Wang Y.
发表日期	2020
ISSN	0031-0182
卷号	559
英文摘要	The continuous existence of the Marinoan Ice Age, a late Cryogenian panglaciation (Snowball Earth), is challenged by the occurrences of widespread glacial marine and nonglacial deposits consisting of stratified diamictite, laminated siltstone and claystone, and even carbonates, which indicate an episode of partial deglaciation. Red beds that commonly accompany these glacial marine and nonglacial deposits have not received enough attention to date. The middle Nantuo Formation of the Cryogenian Marinoan epoch in the Sanshengtai section, Shennongjia area, is composed of 6 lithofacies, i.e., Green Massive Diamictite, Green Laminated Lithic Feldspar Wacke, Green Laminated Siltstone and Claystone, Red Laminated Lithic Feldspar Wacke, Red Crudely Stratified Diamictite, and Red Laminated Siltstone. Among them, the last three constitute the red beds and are interpreted as glacial lacustrine and nonglacial deposits, which can be found and roughly correlated across several continents. High Fe2O3 and low Ce/Ce* values in the red beds suggest a probable association between the formation of red beds and the Neoproterozoic oxygenation events. Coincidences between the occurrences of red beds and high values of Al/Na, Ti/Na, and chemical index of alteration (CIA) indicate the favorability of warm intervals with high weathering intensities for the formation of red beds, whose presence indicates partial deglaciation during the Marinoan Ice Age and provides a new clue to contradict the worldwide Snowball Earth hypothesis. © 2020 Elsevier B.V.
英文关键词	Geochemistry; Nantuo Formation; Paleoclimate; Partial deglaciation; Sedimentary facies
语种	英语
scopus关键词	carbonate; claystone; deglaciation; glaciation; lacustrine deposit; oxygenation; Pleistocene; Proterozoic; red bed; siltstone; weathering profile; China; Hubei; Shennongjia
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/150334
作者单位	Institute of Geology, Chinese Academy of Geological Sciences, Beijing, 100037, China; Department of Geodynamics and Sedimentology, University of Vienna, Althanstrasse 14, Vienna, A-1090, Austria
推荐引用方式 GB/T 7714	Bai H.,Kuang H.,Liu Y.,et al. Marinoan-aged red beds at Shennongjia; South China: Evidence against global-scale glaciation during the Cryogenian[J],2020,559.
APA	Bai H.,Kuang H.,Liu Y.,Peng N.,Chen X.,&Wang Y..(2020).Marinoan-aged red beds at Shennongjia; South China: Evidence against global-scale glaciation during the Cryogenian.Palaeogeography, Palaeoclimatology, Palaeoecology,559.
MLA	Bai H.,et al."Marinoan-aged red beds at Shennongjia; South China: Evidence against global-scale glaciation during the Cryogenian".Palaeogeography, Palaeoclimatology, Palaeoecology 559(2020).