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DOI	10.1016/j.palaeo.2020.109672
	Microbial and animal evolution in relation to redox fluctuations in a deep-water setting of South China during the Ediacaran-Cambrian transition (ca. 551–523 Ma)
	Ye Y.; Shen J.; Feng Q.; Lash G.G.
发表日期	2020
ISSN	0031-0182
卷号	546
英文摘要	The Ediacaran-Cambrian (E-C) transition witnessed significant ecosystem perturbations of the oceanic environment (e.g., oxygen concentrations of seawater) and biological evolution. However, in spite of abundant Ediacara-type megafossils, trace fossils, small shelly fossils (SSFs), macroscopic algae and metazoans recovered from shallow-water E-C transition strata throughout South China, the manifestation of geological events in deep-water settings remains elusive. Here, we present new paleontological and geochemical evidence from the ~38-m-thick deep-water Liuchapo Formation (ca. 551–523 Ma) of the Yangtou section, northeastern Guizhou Province, China, which consists mainly of chert through the E-C transition. The Liuchapo Formation can be divided into two members based on biostratigraphy and redox proxies. The lower member (0–32 m) is characterized by low Mo/Al (0.15–1.82 ppm/%) and U/Al (0.47–2.51 ppm/%) values that suggest deposition under suboxic conditions. These deposits are dominated by Horodyskia minor, Paleopascichnus jiumenensis, spherical cyanobacteria (?Myxococcoides) and random acritarchs. The upper member (32–38 m) records a transition to anoxic (non-sulfidic) conditions as suggested by marked increases in Mo/Al (5–47 ppm/%) and U/Al (8–810 ppm/%). The upper member contains SSFs, sponge spicules, filamentous cyanobacteria, multicellular algae and sheet-like fossils. The survival of diverse organisms under strongly reducing conditions reflected in the upper member suggests that, marine redox fluctuations may limit the growth of Late Ediacaran organisms and provide the living space and elevated nutrients for early Cambrian biota. © 2020 Elsevier B.V.
英文关键词	Cambrian explosion; Chert; Phytoplankton; Redox condition; Trace elements
语种	英语
scopus关键词	alga; biostratigraphy; Cambrian; chert; concentration (composition); cyanobacterium; deep water; Ediacaran; fossil record; metazoan; oxygen; phytoplankton; redox conditions; seawater; trace element; China; Guizhou; Acritarcha; algae; Animalia; Cyanobacteria; Metazoa; Myxococcoides
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/150540
作者单位	State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, Hubei 430074, China; School of Earth Science, China University of Geosciences, Wuhan, Hubei 430074, China; Department of Geology and Environmental Sciences, State University of New York – Fredonia, Fredonia, NY 14063, United States
推荐引用方式 GB/T 7714	Ye Y.,Shen J.,Feng Q.,等. Microbial and animal evolution in relation to redox fluctuations in a deep-water setting of South China during the Ediacaran-Cambrian transition (ca. 551–523 Ma)[J],2020,546.
APA	Ye Y.,Shen J.,Feng Q.,&Lash G.G..(2020).Microbial and animal evolution in relation to redox fluctuations in a deep-water setting of South China during the Ediacaran-Cambrian transition (ca. 551–523 Ma).Palaeogeography, Palaeoclimatology, Palaeoecology,546.
MLA	Ye Y.,et al."Microbial and animal evolution in relation to redox fluctuations in a deep-water setting of South China during the Ediacaran-Cambrian transition (ca. 551–523 Ma)".Palaeogeography, Palaeoclimatology, Palaeoecology 546(2020).