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Different controls on the Hg spikes linked the two pulses of the Late Ordovician mass extinction in South China

文献类型：期刊论文

作者Qiu, Zhen1,2; Wei, Hengye3,4; Tian, Li5; Dal Corso, Jacopo5; Zhang, Jiaqiang6; Zou, Caineng1,2
刊名SCIENTIFIC REPORTS
出版日期2022-03-25
卷号12期号:1页码:12
ISSN号2045-2322
DOI10.1038/s41598-022-08941-3
英文摘要The Late Ordovician mass extinction (LOME, ca. 445 Ma; Hirnantian stage) is the second most severe biological crisis of the entire Phanerozoic. The LOME has been subdivided into two pulses (intervals), at the beginning and the ending of the Hirnantian glaciation, the LOMEI-1 and LOMEI-2, respectively. Although most studies suggest a rapid cooling and/or oceanic euxinia as major causes for this mass extinction, the driver of these environmental changes is still debated. As other Phanerozoic's mass extinctions, extensive volcanism may have been the potential trigger of the Hirnantian glaciation. Indirect evidence of intense volcanism comes from Hg geochemistry: peaks of Hg concentrations have been found before and during the LOME, and have all been attributed to global volcanism in origin. Here, we present high-resolution mercury (Hg) profiles in three study sections, from a shelf to slope transect, on the Yangtze Shelf Sea (South China) to address the origin of Hg anomalies across the Ordovician-Silurian (O-S) boundary. The results show Hg anomaly enrichments in the middle Katian, late Katian, the LOMEI-1 at the beginning of the Hirnantian glaciation, the LOMEI-2 in the late Hirnantian glaciation, and late Rhuddanian. The Hg anomaly enrichments during the middle-late Katian and late Rhuddanian would probably reflect a volcanic origin. We find two different controls on the recorded Hg anomalies during the extinction time: i.e., primarily volcanism for the Hg anomaly at the LOMEI-1 and euxinia for the Hg anomaly at the LOMEI-2. Expansion of euxinia at the LOMEI-1 would have been probably enhanced by volcanic fertilization via weathering of volcanic deposits during the Middle and late Katian, and combined with euxinia at the LOMEI-2 to finally be responsible for the two pulses of the LOME.
WOS关键词SILURIAN TRANSITION ; MERCURY DEPOSITION ; YANGTZE BLOCK ; BLACK-SHALE ; VOLCANISM ; CLIMATE ; TRIGGER
资助项目National Natural Science Foundation of China[41888101] ; National Natural Science Foundation of China[41602119] ; Science and Technology Major Projects of PetroChina[2021yjcq02] ; Science and Technology Major Projects of PetroChina[2021DJ2001]
WOS研究方向Science & Technology - Other Topics
语种英语
WOS记录号WOS:000773323400029
出版者NATURE PORTFOLIO
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Major Projects of PetroChina ; Science and Technology Major Projects of PetroChina ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Major Projects of PetroChina ; Science and Technology Major Projects of PetroChina ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Major Projects of PetroChina ; Science and Technology Major Projects of PetroChina ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Major Projects of PetroChina ; Science and Technology Major Projects of PetroChina
源URL[http://ir.iggcas.ac.cn/handle/132A11/105085]  
专题地质与地球物理研究所_兰州油气中心
通讯作者Qiu, Zhen
作者单位1.China Natl Petr Corp, Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China
2.Natl Energy Shale Gas Res & Dev Expt Ctr, Beijing 100083, Peoples R China
3.Southwest Petr Univ, Sch Geosci & Technol, Chengdu 610500, Peoples R China
4.Southwest Petr Univ, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610050, Peoples R China
5.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China
6.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Qiu, Zhen,Wei, Hengye,Tian, Li,et al. Different controls on the Hg spikes linked the two pulses of the Late Ordovician mass extinction in South China[J]. SCIENTIFIC REPORTS,2022,12(1):12.
APA Qiu, Zhen,Wei, Hengye,Tian, Li,Dal Corso, Jacopo,Zhang, Jiaqiang,&Zou, Caineng.(2022).Different controls on the Hg spikes linked the two pulses of the Late Ordovician mass extinction in South China.SCIENTIFIC REPORTS,12(1),12.
MLA Qiu, Zhen,et al."Different controls on the Hg spikes linked the two pulses of the Late Ordovician mass extinction in South China".SCIENTIFIC REPORTS 12.1(2022):12.

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来源：地质与地球物理研究所

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