CAJ | 학술논문

二叠纪末期地球气候环境发生重大变化，导致陆地和海洋生态系统崩溃，发生了地质历史上最大规模的生物灭绝事件。大火（亦称野火）作为陆地生态系统的关键影响因子，以及气候环境变化的重要指标，在第四纪以前的历史研究中很少有报道。剖析了煤山二叠纪-三叠纪界线521 ka黑碳和燃烧源多环芳烃的沉积记录，恢复了生物灭绝前后的大火历史。研究显示，生物灭绝前的163 ka内大火频繁，在生物灭绝时则发生了最大规模的大火事件；生物灭绝线以上早三叠世地层中未发现燃烧的记录，出现了大火事件间断（时间持续约358 ka）。对比全球多个剖面，这种大火间断事件可能不是局部现象，而是全球性气候环境变化的响应。陆地植被为大火燃烧的原料，伴随着陆地植被的大规模消失和大气氧含量的快速下降，大火燃烧事件也将消失。因此，煤山剖面二叠纪-三叠纪界线的大火间断能用来指示生物的大规模灭绝事件。
이첩기말기지구기후배경발생중대변화，도치륙지화해양생태계통붕궤，발생료지질역사상최대규모적생물멸절사건。대화（역칭야화）작위륙지생태계통적관건영향인자，이급기후배경변화적중요지표，재제사기이전적역사연구중흔소유보도。부석료매산이첩기-삼첩기계선521 ka흑탄화연소원다배방경적침적기록，회복료생물멸절전후적대화역사。연구현시，생물멸절전적163 ka내대화빈번，재생물멸절시칙발생료최대규모적대화사건；생물멸절선이상조삼첩세지층중미발현연소적기록，출현료대화사건간단（시간지속약358 ka）。대비전구다개부면，저충대화간단사건가능불시국부현상，이시전구성기후배경변화적향응。륙지식피위대화연소적원료，반수착륙지식피적대규모소실화대기양함량적쾌속하강，대화연소사건야장소실。인차，매산부면이첩기-삼첩기계선적대화간단능용래지시생물적대규모멸절사건。
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.