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DOI	10.1016/j.epsl.2021.117007
	Vanadium isotope evidence for expansive ocean euxinia during the appearance of early Ediacara biota
	Fan H.; Ostrander C.M.; Auro M.; Wen H.; Nielsen S.G.
发表日期	2021
ISSN	0012821X
卷号	567
英文摘要	For reasons that remain unclear, the initial appearance of large, morphologically complex life on Earth seems to have taken place in deep-marine environments. We provide new perspective on this topic by applying for the first time the vanadium (V) isotope paleoredox-proxy. We use shales in two different sections that preserve Doushantuo Member IV (South China) to reconstruct a global seawater V isotope composition (δ51V=∼−0.23±0.06‰) during the late-Ediacaran (∼567 to ≥ 560 million years ago) that is much lighter than today. A mass-balance model informed by this composition is only reconciled by a global ocean in which hydrogen sulfide-rich (‘euxinic’) conditions were commonly present on continental shelves. Higher surface temperatures are a known driver of widespread euxinia in Earth's past, and if this was also the case during the late-Ediacaran, then relegation of large complex life to deep-marine settings at this time was probably driven to some extent by the persistently cooler and sulfide-poor conditions offered by this refuge. © 2021 Elsevier B.V.
关键词	early Ediacara biota euxinic conditions vanadium isotope
英文关键词	Sulfur compounds; Vanadium compounds; Complex life; Deep-marine; Early ediacarum biota; Ediacara biota; Ediacaran; Euxinia; Euxinic conditions; Marine environment; South China; Vanadium isotope; Isotopes; biota; Ediacaran; euxinic environment; isotopic analysis; marine environment; paleoceanography; shale; vanadium
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203081
作者单位	State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, CAS, Guiyang, 550081, China; NIRVANA Laboratories, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Department Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA, United States
推荐引用方式 GB/T 7714	Fan H.,Ostrander C.M.,Auro M.,et al. Vanadium isotope evidence for expansive ocean euxinia during the appearance of early Ediacara biota[J],2021,567.
APA	Fan H.,Ostrander C.M.,Auro M.,Wen H.,&Nielsen S.G..(2021).Vanadium isotope evidence for expansive ocean euxinia during the appearance of early Ediacara biota.Earth and Planetary Science Letters,567.
MLA	Fan H.,et al."Vanadium isotope evidence for expansive ocean euxinia during the appearance of early Ediacara biota".Earth and Planetary Science Letters 567(2021).