globalchange  > 气候变化与战略
DOI: 10.1016/j.epsl.2021.117007
论文题名:
Vanadium isotope evidence for expansive ocean euxinia during the appearance of early Ediacara biota
作者: Fan H.; Ostrander C.M.; Auro M.; Wen H.; Nielsen S.G.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2021
卷: 567
语种: 英语
中文关键词: 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
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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165459
Appears in Collections:气候变化与战略

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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

Recommended Citation:
Fan H.,Ostrander C.M.,Auro M.,et al. Vanadium isotope evidence for expansive ocean euxinia during the appearance of early Ediacara biota[J]. Earth and Planetary Science Letters,2021-01-01,567
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