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Terminal Ediacaran anoxia in deep-ocean: Trace element evidence from cherts of the Liuchapo Formation, South China

文献类型：期刊论文

作者Chang HuaJin1,2; Chu XueLei1; Feng LianJun1; Huang Jing1,2
刊名SCIENCE IN CHINA SERIES D-EARTH SCIENCES
出版日期2009-06-01
卷号52期号:6页码:807-822
关键词chert anoxia trace elements redox proxy Ediacaran South China
ISSN号1006-9313
DOI10.1007/s11430-009-0070-7
文献子类Article
英文摘要Here we report a detailed trace element study of the cherts from Liuchapo Formation, which is a terminal Ediacaran (551-542 Ma) succession in South China deposited in deep-water basinal setting. The REE of Liuchapo cherts shows similar features as observed for anoxic modern seawater (but not for hydrothermal fluids), characterized by positive La anomaly (La-N/Ce-N = 0.83-1.91, average 1.37), moderately negative Ce anomaly (0.53-1.1, average 0.73), positive Gd anomaly (average 1.08), positive Y anomaly (average 1.21), and depleted LREE and MREE. In addition, the Liuchapo cherts have low I REE pound (3.36-56.13 ppm, average 20.6 ppm), low Al2O3, Ti, Th and Zr concentrations, and high Y/Ho ratios (up to 43.9). The redox-sensitive trace elements concentrations in the cherts do not correlate with detrital input proxies. All of these features suggest that the redox-sensitive trace elements in the cherts were authigenically concentrated in water column and their concentrations thus are excellent indicators of ancient redox conditions. Very low Th/U ratios, high V/(V+Ni) and Fe-aScurrency sign/Al ratios, enrichments of redox-sensitive trace elements (U, V, Mo), and low concentration of Mn in the cherts imply anoxia in the deep seawater. Our data reveal that the terminal Ediacaran ocean was not completely oxidized and the deep ocean was still anoxic, at least in South China. We propose that although the oxidative events existed in the terminal Ediacaran oceans, decomposition of organic matter prolonged anoxia in the deep ocean.
WOS关键词RARE-EARTH-ELEMENTS ; REDOX-SENSITIVE METALS ; EAST PACIFIC RISE ; BLACK SHALES ; ORGANIC-MATTER ; MINOR ELEMENTS ; SAANICH INLET ; VENT-FIELD ; SEAWATER ; GEOCHEMISTRY
WOS研究方向Geology
语种英语
WOS记录号WOS:000266927700008
出版者SCIENCE PRESS
资助机构National Natural Science Foundation of China(40532012 ; National Natural Science Foundation of China(40532012 ; National Natural Science Foundation of China(40532012 ; National Natural Science Foundation of China(40532012 ; Chinese Academy of Sciences(KZCX3-SW-141) ; Chinese Academy of Sciences(KZCX3-SW-141) ; Chinese Academy of Sciences(KZCX3-SW-141) ; Chinese Academy of Sciences(KZCX3-SW-141) ; 40873007 ; 40873007 ; 40873007 ; 40873007 ; 40603021) ; 40603021) ; 40603021) ; 40603021) ; National Natural Science Foundation of China(40532012 ; National Natural Science Foundation of China(40532012 ; National Natural Science Foundation of China(40532012 ; National Natural Science Foundation of China(40532012 ; Chinese Academy of Sciences(KZCX3-SW-141) ; Chinese Academy of Sciences(KZCX3-SW-141) ; Chinese Academy of Sciences(KZCX3-SW-141) ; Chinese Academy of Sciences(KZCX3-SW-141) ; 40873007 ; 40873007 ; 40873007 ; 40873007 ; 40603021) ; 40603021) ; 40603021) ; 40603021) ; National Natural Science Foundation of China(40532012 ; National Natural Science Foundation of China(40532012 ; National Natural Science Foundation of China(40532012 ; National Natural Science Foundation of China(40532012 ; Chinese Academy of Sciences(KZCX3-SW-141) ; Chinese Academy of Sciences(KZCX3-SW-141) ; Chinese Academy of Sciences(KZCX3-SW-141) ; Chinese Academy of Sciences(KZCX3-SW-141) ; 40873007 ; 40873007 ; 40873007 ; 40873007 ; 40603021) ; 40603021) ; 40603021) ; 40603021) ; National Natural Science Foundation of China(40532012 ; National Natural Science Foundation of China(40532012 ; National Natural Science Foundation of China(40532012 ; National Natural Science Foundation of China(40532012 ; Chinese Academy of Sciences(KZCX3-SW-141) ; Chinese Academy of Sciences(KZCX3-SW-141) ; Chinese Academy of Sciences(KZCX3-SW-141) ; Chinese Academy of Sciences(KZCX3-SW-141) ; 40873007 ; 40873007 ; 40873007 ; 40873007 ; 40603021) ; 40603021) ; 40603021) ; 40603021)
源URL[http://ir.iggcas.ac.cn/handle/132A11/70331]  
专题中国科学院地质与地球物理研究所
通讯作者Chu XueLei
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Chang HuaJin,Chu XueLei,Feng LianJun,et al. Terminal Ediacaran anoxia in deep-ocean: Trace element evidence from cherts of the Liuchapo Formation, South China[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2009,52(6):807-822.
APA Chang HuaJin,Chu XueLei,Feng LianJun,&Huang Jing.(2009).Terminal Ediacaran anoxia in deep-ocean: Trace element evidence from cherts of the Liuchapo Formation, South China.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,52(6),807-822.
MLA Chang HuaJin,et al."Terminal Ediacaran anoxia in deep-ocean: Trace element evidence from cherts of the Liuchapo Formation, South China".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 52.6(2009):807-822.

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来源：地质与地球物理研究所

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