globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.epsl.2018.04.004
Scopus记录号: 2-s2.0-85045417974
论文题名:
Early Wuchiapingian cooling linked to Emeishan basaltic weathering?
作者: Yang J.; Cawood P.A.; Du Y.; Condon D.J.; Yan J.; Liu J.; Huang Y.; Yuan D.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 492
起始页码: 102
结束页码: 111
语种: 英语
英文关键词: early Wuchiapingian cooling ; Emeishan large igneous province ; late Paleozoic ice age ; South China ; weathering trends
Scopus关键词: Geochronology ; Organic carbon ; Silicate minerals ; Weathering ; Zircon ; Atmospheric pCO2 ; Emeishan large igneous provinces ; Isotopic record ; Large igneous provinces ; Late paleozoic ice age ; Longtan Formation ; Paleotemperatures ; South China ; Glacial geology ; basalt ; cooling ; large igneous province ; last glaciation ; mudstone ; paleoclimate ; paleotemperature ; Pleistocene ; weathering ; China
英文摘要: The last glaciation during the late Paleozoic ice age commenced at around the Guadalupian–Lopingian (G–L) boundary and is synchronous with the emplacement of the Emeishan large igneous province. Using CA-TIMS zircon U–Pb dating, we obtained an age of 259.51 ± 0.21 Ma for the uppermost tuff from the Puan volcanic sequence in the eastern Emeishan large igneous province, constraining the timing of Emeishan volcanism and providing another candidate age for the G–L boundary. In addition, we determined an age of 259.69 ± 0.72 Ma for a basal claystone in the immediately overlying Longtan Formation from a drill core section in southwest South China. These ages, along with source weathering trends of mudstones from the lower Longtan Formation, and compiled paleotemperature records, indicate an earliest Wuchiapingian cooling coinciding with the onset of the last Permian glaciation. This global cooling is associated with positive shifts in both organic and carbonate carbon isotopic records and likely a decrease in atmospheric pCO2. A hypothesised causal linkage is proposed in which the rapid post-eruptive basaltic weathering of the Emeishan province in an equatorial humid belt may accelerate the atmospheric CO2 consumption and lead to climate cooling. Our work supports the long-term climate cooling effects of large igneous provinces. © 2018 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/109893
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: State Key Laboratory of Biogeology and Environmental Geology, School of Earth Sciences, China University of Geosciences, Wuhan, 430074, China; School of Earth, Atmosphere & Environment, Monash University, Melbourne, VIC 3800, Australia; NERC Isotope Geosciences Laboratory, British Geological Survey, Keyworth, NG12 5GG, United Kingdom; Bureau of Geology and Mineral Exploration and Development Guizhou Province, Guiyang, 550000, China; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, 210008, China

Recommended Citation:
Yang J.,Cawood P.A.,Du Y.,et al. Early Wuchiapingian cooling linked to Emeishan basaltic weathering?[J]. Earth and Planetary Science Letters,2018-01-01,492
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