干旱区生态环境知识资源中心(Arid): A benthic oxygen oasis in the early Neoproterozoic ocean

Arid

DOI	10.1016/j.precamres.2020.106085
	A benthic oxygen oasis in the early Neoproterozoic ocean
	Wang, Haiyang; Liu, Aoran; Li, Chao; Feng, Qinglai; Tang, Shida; Cheng, Meng; Algeo, Thomas J.
通讯作者	Li, C (corresponding author), China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Hubei, Peoples R China.
来源期刊	PRECAMBRIAN RESEARCH
ISSN	0301-9268
EISSN	1872-7433
出版年	2021
卷号	355
英文摘要	Benthic oxygen oases linked to photosynthetic mats have been reported in modern anoxic aquatic systems. Benthic macroalgal blooms were common in stratified, anoxic Neoproterozoic oceans, leading us to hypothesize the existence of benthic oxygen oases at that time. This hypothesis has significant implications regarding the bioavailability of transition metals (e.g., Cu, Zn, Ni, Mo, V) and the distribution of aerobic eukaryotes in these oceans. However, little research has been directed toward testing the benthic oxygen oasis hypothesis in ancient anoxic marine systems. In this contribution, we report on an integrated investigation of iron speciation, trace elements, and carbon-sulfur-delta S-34(py) for the Tonian Longfengshan Biota-bearing versus non-fossil-bearing shales of the Luotuoling Formation in the Longfengshan section of the Yanshan Basin (North China). Typical marine B/Ga values (6.5-7.3) suggest that the Yanshan Basin was fully marine and well connected with the open ocean. The low F-eHR/F-eT ratios of the non-fossiliferous intervals (mean 0.14) suggest oxic water-column conditions during their deposition, and their F-eHR pool contains significant amounts of pyrite and siderite (up to 44%), implying their formation in underlying reducing sedimentary porewaters. In contrast, the fossil-bearing layers show high and oscillating F-eHR/F-eT ratios (mean 0.39; up to 0.51) and systematically low F-epy/F-eHR (mean similar to 0), suggesting dominantly ferruginous water-column conditions with redox oscillation. Furthermore, lack of redox sensitive trace-metal and sulfide enrichments and dominance of the F-eHR pool by ferric oxide and magnetite (96-100%) indicate substantially oxidative power in the reducing water-column and underlying surface sediments. In combination with coexisting sedimentological and paleontological data, these conflicting and contrasting redox signals can be best interpreted by the development of benthic oxygen oases in deeper reducing waters, regulated by the Neoproterozoic benthic macroalga Longfengshaniaceae most likely in association with microbial/cyanobacterial mats, which contributed the oxidative power in the reducing environments. Our findings provide new insights into early Neoproterozoic oceanic redox conditions, iron cycling and the evolution of early aerobic eukaryotes, including animals.
英文关键词	North China Tonian Longfengshan Biota Fe speciation Oxygenation Macroalgae
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000652026000009
WOS关键词	IRON PALEOREDOX PROXIES ; MICROBIAL MATS ; FERRUGINOUS CONDITIONS ; REDOX CONDITIONS ; WATER COLUMN ; MACKENZIE MOUNTAINS ; TRACE FOSSIL ; EDIACARAN ; EVOLUTION ; ANIMALS
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/351422
作者单位	[Wang, Haiyang; Li, Chao; Tang, Shida; Cheng, Meng; Algeo, Thomas J.] China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Hubei, Peoples R China; [Liu, Aoran] Hebei GEO Univ, Sch Earth Sci, Shijiazhuang 050031, Hebei, Peoples R China; [Liu, Aoran] Hebei GEO Univ, Hebei Key Lab Strateg Crit Mineral Resources, Shijiazhuang 050031, Hebei, Peoples R China; [Feng, Qinglai; Algeo, Thomas J.] China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Hubei, Peoples R China; [Feng, Qinglai] China Univ Geosci, Sch Earth Sci, Wuhan 430074, Hubei, Peoples R China; [Algeo, Thomas J.] Univ Cincinnati, Dept Geol, Cincinnati, OH 45221 USA
推荐引用方式 GB/T 7714	Wang, Haiyang,Liu, Aoran,Li, Chao,et al. A benthic oxygen oasis in the early Neoproterozoic ocean[J],2021,355.
APA	Wang, Haiyang.,Liu, Aoran.,Li, Chao.,Feng, Qinglai.,Tang, Shida.,...&Algeo, Thomas J..(2021).A benthic oxygen oasis in the early Neoproterozoic ocean.PRECAMBRIAN RESEARCH,355.
MLA	Wang, Haiyang,et al."A benthic oxygen oasis in the early Neoproterozoic ocean".PRECAMBRIAN RESEARCH 355(2021).