globalchange  > 气候变化与战略
DOI: 10.1016/j.epsl.2021.116902
论文题名:
Cryogenian interglacial greenhouse driven by enhanced volcanism: Evidence from mercury records
作者: Zhou T.; Pan X.; Sun R.; Deng C.; Shen J.; Kwon S.Y.; Grasby S.E.; Xiao J.; Yin R.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2021
卷: 564
语种: 英语
中文关键词: Cyrogenian interglacial interval ; greenhouse ; Hg isotopes ; neoproterozoic ; volcanism
英文关键词: Glacial geology ; Greenhouses ; Mercury (metal) ; Organic carbon ; Volcanoes ; CO$-2$/ emission ; Cryogenian ; Cyrogenian interglacial interval ; Hg concentrations ; Hg isotope ; Interglacial periods ; Marinoan ; Neoproterozoic ; Volcanics ; Volcanism ; Isotopes ; chemostratigraphy ; concentration (composition) ; glaciation ; greenhouse gas ; interglacial ; mercury (element) ; paleoenvironment ; Proterozoic ; volcanism ; China ; Elliptio dilatata
英文摘要: An ice-free greenhouse interval (ca. 660 ∼ 650 Ma) occurred between the global Sturtian (ca. 717 Ma ∼ 660 Ma) and Marinoan glaciation (ca. 650 Ma ∼ 635 Ma) during the Cryogenian. While volcanic CO2 emissions have been suggested as a trigger for this ice-free interval, evidence for volcanism has been lacking. In this study, spikes in both Hg concentration (76 to 366 ppb) and Hg to total organic carbon ratio (Hg/TOC: 114 to 717 ppb/wt.%) were observed in the Wuhe section of South China, suggesting that extensive volcanic emissions of Hg occurred during the Cryogenian interglacial period. Positive Δ199Hg (0.02 to 0.18‰) values were observed in these Hg-rich shales, indicating that the volcanic Hg was cycling in the atmosphere, deposited in seawater, and sequestered to sediment via organic matter burial. Combined with other geochemical proxies (e.g., organic carbon isotope and chemical index of alteration), our results provide the first direct evidence that volcanism played a key role in forming the brief Cryogenian interglacial period. © 2021 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165754
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作者单位: State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, China; University of Chinese Academy of Sciences, Beijing, 100049, China; State Key Laboratory of Geological Processes and Mineral Resources, China, University of Geosciences, Wuhan, 430074, China; Division of Environmental Science and Engineering, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam Gu, Pohang, 37673, South Korea; Geological Survey of Canada, Calgary Natural Resources Canada, 3303 33rd Street NW, Calgary, AB T2L 2A7, Canada

Recommended Citation:
Zhou T.,Pan X.,Sun R.,et al. Cryogenian interglacial greenhouse driven by enhanced volcanism: Evidence from mercury records[J]. Earth and Planetary Science Letters,2021-01-01,564
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