DOI: 10.1016/j.gloplacha.2012.02.011
论文题名: Volcanism in South China during the Late Permian and its relationship to marine ecosystem and environmental changes
作者: Shen J. ; Algeo T.J. ; Hu Q. ; Xu G. ; Zhou L. ; Feng Q.
刊名: Global and Planetary Change
ISSN: 0921-8305
出版年: 2013
卷: 105 起始页码: 121
结束页码: 134
语种: 英语
英文关键词: Anoxia
; Chemical index of alteration
; Mass extinction
; Permian-Triassic
; Primary productivity
; Rare earth elements
Scopus关键词: Anoxia
; Chemical index of alterations
; Mass extinction
; Permian-Triassic
; Primary productivity
; Ecosystems
; Rare earth elements
; Silica
; Volcanoes
; Geology
; anoxia
; biofacies
; carbonate
; chemical weathering
; environmental change
; marine environment
; mass extinction
; Permian
; Permian-Triassic boundary
; primary production
; silica
; volcanism
; China
; Guizhou
英文摘要: A deep-shelf section at Xinmin (Guizhou Province, South China) records numerous volcanic ashfall events both preceding and following the latest Permian mass extinction. Each ash layer was associated with ecosystem and environmental changes, including significant declines in biogenic silica and carbonate production and shifts toward somewhat more reducing conditions within a generally suboxic facies. The extinction horizon itself, which coincided with an ashfall event, shows evidence of much larger changes, including a sharp and sustained reduction in radiolarian productivity, a shift from suboxic to mostly oxic conditions (although punctuated by episodic euxinic events), and an increase in weathering intensity due to increased climatic humidity. Ash layers of Late Permian-Early Triassic age at Xinmin and elsewhere in South China are thought to have had a regional volcanic source, perhaps in subduction-zone magmatic arcs along the margins of the South China Craton. The Xinmin section provides evidence that volcanically generated stresses were repeatedly imposed on marine systems of the South China Craton during the Late Permian, possibly weakening their resilience in advance of the Permian-Triassic boundary crisis. © 2012. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84876957382&doi=10.1016%2fj.gloplacha.2012.02.011&partnerID=40&md5=f58576a65ee0ebe44e438876dad3fb6e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11211
Appears in Collections: 全球变化的国际研究计划
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作者单位: State Key Laboratory of Geological Process and Mineral Resources, China University of Geosciences, Wuhan, Hubei 430074, China
Recommended Citation:
Shen J.,Algeo T.J.,Hu Q.,et al. Volcanism in South China during the Late Permian and its relationship to marine ecosystem and environmental changes[J]. Global and Planetary Change,2013-01-01,105.