中山大学学报（自然科学版）Issue(6)：19-26,8.
二叠纪-三叠纪野火间断事件对生物灭绝的响应--以浙江煤山剖面为例
Permian-Triassic Wildfire Gap Responses to the Mass Extinction-An Example Study in the Meishan Section,Zhejiang Province
摘要
Abstract
Great changes occurred in the earth’s surrounding environments during the Permian-Triassic (P-Tr)transition and resulted in the collapse of land and marine ecosystems.Thus,the most severe mass extinction in the earth’s history appeared across the P-Tr boundary.Wildfire,as a key ecosystem driver and climate change indicator,is seldom reported in the documents of the pre-Quaternary researches.In this study,a 521 ka record of wildfire during the P-Tr mass extinction was recurred through the black car-bon (BC)and combustion-derived polycyclic aromatic hydrocarbons (PAHs)records in the GSSP section of Meishan.There were frequent wildfires in the 163 ka of history just before the P-Tr mass extinction and the most intensive one occurred in the mass extinction event beds.No combustion records were found in the beds above mass extinction line and a wildfire gap (lasting 358 ka)was recognized in the Early Trias-sic.Wildfire gap may be not a local phenomenon,but a response of global climatic and environmental changes.Wildfire would vanish accompanied by the destruction of land vegetation and abrupt drop of at-mospheric oxygen.Therefore,Meishan P-Tr wildfire gap can be used as an indicator of the mass extinc-tion.关键词
二叠纪-三叠纪/大火间断/生物灭绝/煤山剖面Key words
Permian-Triassic/wildfire gap/mass extinction/meishan section分类
地质学引用本文复制引用
沈文杰,钟莉莉,林杨挺,孙永革,张华,杨志军,周永章..二叠纪-三叠纪野火间断事件对生物灭绝的响应--以浙江煤山剖面为例[J].中山大学学报（自然科学版）,2014,(6):19-26,8.基金项目
国家自然科学基金资助项目（40803014）；高校基本科研业务费资助项目（32110-3161324）；海洋公益性科研资助项目 （）
