globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2015.04.022
论文题名:
The onset of flood volcanism in the north-western part of the Siberian Traps: Explosive volcanism versus effusive lava flows
作者: Jerram D.A.; Svensen H.H.; Planke S.; Polozov A.G.; Torsvik T.H.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 441
起始页码: 38
结束页码: 50
语种: 英语
英文关键词: Extinction ; Flood basalt ; Large igneous province ; Siberia ; Tuff
英文摘要: The Siberian Traps large igneous province was formed during the end-Permian, about 252. Ma ago. Basaltic melt was injected into the organic and salt rich Tunguska sedimentary basin, forming interconnected sill complexes and associated hydrothermal vent complexes. Thick deposits of basaltic tuff and tephra covered the paleosurface before the onset of flood volcanism, commonly taken as direct evidence for the explosive nature of the initial phase of volcanism. The field work in this study revealed that tuffs are virtually absent along a 150. km long transect along the Dyupkun lake and Kureika river, even though tuff is shown on available geological maps. Towards the south and west, the transition between the end-Permian sediments and the flood basalts is either characterized by thin (2-5 m) to no tephra deposits (Khantaika area), hyaloclastites and associated lake-deposited tephra (Kureika area), or massive tephra deposits from local eruptive centers (Severnaya area). The new results can be put into the context of other studies about volcanic tuff horizons in Siberia, and questions the notion of province-scale explosive volcanism in Siberia during the onset of flood volcanism. Moreover, the main thicknesses of explosive tuff deposits, up to 700 m, are located in the central and southern parts of the province where the LIP erupted through thick Cambrian salt and carbonate sequences. Since numerous phreatomagmatic pipes are present in these areas, we suggest a causal relationship between deep magma-sediment interactions, explosive eruptions and the resulting environmental stress that initiated the end-Permian mass extinction. © 2015 Elsevier B.V.
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被引频次[WOS]:41   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68700
Appears in Collections:过去全球变化的重建

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作者单位: Centre for Earth Evolution and Dynamics (CEED), University of Oslo, Norway; DougalEARTH Ltd., Solihull, United Kingdom; Volcanic Basin Petroleum Research (VBPR), Oslo Innovation Center, Oslo, Norway; Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry, Russian Academy of Sciences, Moscow, Russian Federation; NGU Geodynamics, Trondheim, Norway; School of Geosciences, University of Witwatersrand, South Africa; Earth, Environmental and Biological Sciences, Queensland University of Technology, Brisbane, QLD, Australia

Recommended Citation:
Jerram D.A.,Svensen H.H.,Planke S.,et al. The onset of flood volcanism in the north-western part of the Siberian Traps: Explosive volcanism versus effusive lava flows[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,441
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