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  4. 中国科学院新生代地质与环境重点实验室
Dramatic attenuation of continental weathering during the Ediacaran-Cambrian transition: Implications for the climatic-oceanic-biological co-evolution

文献类型：期刊论文

作者Zhang, Gongjing5,6,7,8; Chen, Daizhao5,6,8; Huang, Kang-Jun1,9; Liu, Mu5,6,8; Huang, Taiyu2,5,8; Yeasmin, Rumana3; Fu, Yong4
刊名GLOBAL AND PLANETARY CHANGE
出版日期2021-08-01
卷号203页码:11
ISSN号0921-8181
关键词Ediacaran-Cambrian transition Magnesium isotopes Weathering intensity Climate cooling and glaciation Climatic-oceanic-biological co-evolution
DOI10.1016/j.gloplacha.2021.103518
英文摘要The Ediacaran-Cambrian (E-C) transition witnessed dramatic tectonic, climatic, oceanic, and biological coevolutions at the dawn of the 'Cambrian explosion'. Although glaciations were reported in some mid-highlatitude continents during this interval, large uncertainties remain concerning timing and extent, as well as their effect on the entire Earth's surface system. We here report magnesium (Mg) isotopic compositions, along with chemical index of alteration (CIA), Al/Ti ratios from a time-dated, nonglacial E-C boundary section on the mid-low-latitude Yangtze Block, South China, to constrain chemical weathering intensity and associated climatic, oceanic and biological co-evolution during this critical interval. Our data demonstrate a rapid and significant negative delta 26Mg excursion (from +1.28 to - 0.34 & permil;) along with similar CIA and Al/Ti decreases across the E-C boundary, reflecting an apparent attenuation in chemical weathering intensity likely in response to severe climate cooling. This finding further affirms the far-field glaciation reported in the mid-high-latitude continents during the E-C transition. Under this condition, the intense climate cooling could have enhanced oceanic circulation and/or upwelling, and simultaneously caused prominent variations of seawater geochemistry (including alkalinity elevation) and nutrient flux as well as ecological stresses on metazoans. All these could reasonably account for extensive deposition of phosphorites and organic-rich black shales, and faunal turnover (extinction of Ediacaran fauna and appearance of skeletonized small shelly fauna) across this interval. These novel datasets thus shed new insights into the climatic-oceanic-biological interactions and time-specific deposition around the E-C transition at the prelude of the Cambrian explosive bioradiation.
WOS关键词MAGNESIUM ISOTOPE FRACTIONATION ; SOUTH CHINA ; SEDIMENTARY-ROCKS ; YANGTZE PLATFORM ; EVOLUTION ; MG ; GEOCHEMISTRY ; PROVENANCE ; BOUNDARY ; BEHAVIOR
资助项目National Key Research and Development Program[2017YFC0603103] ; National Natural Science Foundation of China[91755210] ; National Natural Science Foundation of China[41763006] ; National Natural Science Foundation of China[U1812402]
WOS研究方向Physical Geography ; Geology
语种英语
出版者ELSEVIER
WOS记录号WOS:000675884600002
资助机构National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/101930]  
专题地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Chen, Daizhao; Fu, Yong
作者单位1.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Peoples R China
2.China Natl Adm Coal Geol, Gen Prospecting Inst, Beijing 100039, Peoples R China
3.Jahangirnagar Univ, Dept Geol Sci, Dhaka 1342, Bangladesh
4.Guizhou Univ, Coll Resources & Environm Engn, Guiyang 550025, Peoples R China
5.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
6.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
7.Taiyuan Univ Technol, Dept Earth Sci & Engn, Shanxi Key Lab Coal & Coal Measure Gas Geol, Taiyuan 030024, Peoples R China
8.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
9.Northwest Univ, Dept Geol, Shaanxi Key Lab Early Life & Environm, Xian 710069, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Gongjing,Chen, Daizhao,Huang, Kang-Jun,et al. Dramatic attenuation of continental weathering during the Ediacaran-Cambrian transition: Implications for the climatic-oceanic-biological co-evolution[J]. GLOBAL AND PLANETARY CHANGE,2021,203:11.
APA Zhang, Gongjing.,Chen, Daizhao.,Huang, Kang-Jun.,Liu, Mu.,Huang, Taiyu.,...&Fu, Yong.(2021).Dramatic attenuation of continental weathering during the Ediacaran-Cambrian transition: Implications for the climatic-oceanic-biological co-evolution.GLOBAL AND PLANETARY CHANGE,203,11.
MLA Zhang, Gongjing,et al."Dramatic attenuation of continental weathering during the Ediacaran-Cambrian transition: Implications for the climatic-oceanic-biological co-evolution".GLOBAL AND PLANETARY CHANGE 203(2021):11.

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来源：地质与地球物理研究所

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