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Volcanic activities triggered the first global cooling event in the Phanerozoic

文献类型：期刊论文

作者Tao, Huifei2; Qiu, Zhen1; Lu, Bin1; Liu, Yutong2; Qiu, Junli2
刊名JOURNAL OF ASIAN EARTH SCIENCES
出版日期2020-06-01
卷号194页码:9
关键词Late Ordovician Bentonite Carbon dioxide Global glacial event Yangtze plate
ISSN号1367-9120
DOI10.1016/j.jseaes.2019.104074
英文摘要Late Ordovician - Early Silurian bentonites and shales are widely distributed in the western Yangtze plate, South China. This study is to use these rocks to examine the mechanism of global cooling. We present total organic carbon content (TOC) and organic carbon isotope data. The TOC of the shales for the Qiliao (QL) and Shuanghe (SH) sections range from 0.21% to 5.88% with an average of 3.0%, and from 1.48% to 6.34% with an average of 2.91%, respectively. The organic carbon isotopic compositions of the shales from the QL and SH sections are 31.1 parts per thousand-29.4 parts per thousand (average 30.3%o) and -30.8 parts per thousand-29.1 parts per thousand (average 30.0 parts per thousand, respectively. In combination with previous studies of the Katian to Hirnantian glaciation, two conclusions can be summarized: (1) shales in close proximity to volcanic ash (bentonite) layers exhibit obvious TOC reduction, which indicates that the deposition of volcanic ash inhibited the productivity of marine plankton; (2) the organic carbon isotope compositions of shales close to volcanic ash layers present positive excursions, reflecting the decline of the atmospheric carbon dioxide after the volcanic ruption. The main reason is probably that the intense volcanic eruptions created abundant volcanic ash for weathering. It is probably 840 x 10(15) kg (1.9 x 10(19) mol) carbon dioxide was consumed in the process of volcanic ash weathering, this would make the carbon dioxide content of the atmosphere drop to the threshold level, which triggered the global glacial event during the Early Hirnantian stage, and then the Earth entered into an ice age in the Late Ordovician. Therefore, this study provides a new point of view to understand the climate variation in the Earth's geological evolution history.
WOS关键词ORDOVICIAN-SILURIAN TRANSITION ; CARBON-ISOTOPE FRACTIONATION ; ORGANIC-CARBON ; ATMOSPHERIC CO2 ; SOUTH CHINA ; K-BENTONITE ; PRODUCTIVITY ; DELTA-C-13 ; MARINE ; CYCLE
资助项目National natural science foundation of China[41602119] ; Research Institute of Petroleum Exploration & Development CNPC Program[XN41601] ; Research Institute of Petroleum Exploration & Development CNPC Program[XN41603] ; Youth Innovation Promotion Association CAS[2016068] ; Gansu Natural Science Fund[18JR3RA396]
WOS研究方向Geology
语种英语
WOS记录号WOS:000538820400029
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构National natural science foundation of China ; National natural science foundation of China ; Research Institute of Petroleum Exploration & Development CNPC Program ; Research Institute of Petroleum Exploration & Development CNPC Program ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Gansu Natural Science Fund ; Gansu Natural Science Fund ; National natural science foundation of China ; National natural science foundation of China ; Research Institute of Petroleum Exploration & Development CNPC Program ; Research Institute of Petroleum Exploration & Development CNPC Program ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Gansu Natural Science Fund ; Gansu Natural Science Fund ; National natural science foundation of China ; National natural science foundation of China ; Research Institute of Petroleum Exploration & Development CNPC Program ; Research Institute of Petroleum Exploration & Development CNPC Program ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Gansu Natural Science Fund ; Gansu Natural Science Fund ; National natural science foundation of China ; National natural science foundation of China ; Research Institute of Petroleum Exploration & Development CNPC Program ; Research Institute of Petroleum Exploration & Development CNPC Program ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Gansu Natural Science Fund ; Gansu Natural Science Fund
源URL[http://ir.iggcas.ac.cn/handle/132A11/96909]  
专题地质与地球物理研究所_兰州油气中心
通讯作者Tao, Huifei; Qiu, Zhen
作者单位1.PetroChina Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Lanzhou Ctr Oil & Gas Resources, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China
推荐引用方式
GB/T 7714		 Tao, Huifei,Qiu, Zhen,Lu, Bin,et al. Volcanic activities triggered the first global cooling event in the Phanerozoic[J]. JOURNAL OF ASIAN EARTH SCIENCES,2020,194:9.
APA Tao, Huifei,Qiu, Zhen,Lu, Bin,Liu, Yutong,&Qiu, Junli.(2020).Volcanic activities triggered the first global cooling event in the Phanerozoic.JOURNAL OF ASIAN EARTH SCIENCES,194,9.
MLA Tao, Huifei,et al."Volcanic activities triggered the first global cooling event in the Phanerozoic".JOURNAL OF ASIAN EARTH SCIENCES 194(2020):9.

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来源：地质与地球物理研究所

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