| DOI: | 10.1016/j.earscirev.2020.103438
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| 论文题名: | Tunguska сoals, Siberian sills and the Permian-Triassic extinction |
| 作者: | Davydov V.I.
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| 刊名: | Earth Science Reviews
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| ISSN: | 00128252
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| 出版年: | 2021
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| 卷: | 212 | | 语种: | 英语
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| 中文关键词: | Coal grades
; Intrusives-sills, stratigraphy
; Permian-Triassic extinction
; Tunguska Coal Basin
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| 英文关键词: | carbon dioxide
; coal seam
; extinction
; magma
; magmatism
; paleoenvironment
; Permian-Triassic boundary
; sedimentary rock
; Russian Federation
; Tunguska
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| 英文摘要: | The latest Permian-Triassic volcanism that created the Siberian traps, including the products of the explosion and interaction of the magmas with regional volcanic and sedimentary rocks, is now considered to be the main driving forces of the end-Permian mass extinction - the greatest global extinction in the Earth history. As proposed, the trap magmatism induced metamorphism of the sedimentary succession that released the sediment-derived CO2 from the thermogenic cracking of coal by intrusive heating. Although the coal-intrusion interaction plays a central role in this model, the coal geology in Tunguska Basin, i.e. spatial and temporal distribution of coals, coal metamorphism and specifics of the metamorphism at the contact of coals and intrusions, has never been assessed from this prospective. The overall goal of this study is to clarify the role and contribution CO2 of the Tunguska coals to the model. The study suggests that the thickness and distribution of the sills within the coal-bearing successions at most minimally influence the overall metamorphic grade of the coals in Tunguska Basin. The age of the explosion pipes that delivered CO2 into the atmosphere most probably is early Triassic to Jurassic-early Cretaceous. The low degree of metamorphism driven by the magmatism, questions estimates of the amount of sediment-derived CO2 generated that could have influenced or driven the PTB extinction. Furthermore, as a mechanism to deliver such gases to the atmosphere, the explosion pipes post-date the extinction. © 2020 Elsevier B.V. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/166373
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| Appears in Collections: | 气候变化与战略
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作者单位: | Kazan Federal University, Kazan, Russian Federation; Boise State University, Boise, ID, United States
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| Recommended Citation: | |
Davydov V.I.. Tunguska сoals, Siberian sills and the Permian-Triassic extinction[J]. Earth Science Reviews,2021-01-01,212
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