地质学报2011，Vol.85Issue(1)：145-156,12.
湖南台地泥盆纪末绝灭事件后的微生物沉积
Microbial Sediments Occurring after the End-Devonian Extinction Event on the Hunan Platform
摘要
Abstract
A post-Hangenberg Event microbial sediments occur overlying disconformablely on the bauxite-clay beds or fenestral limestone of the topmost Devonian in central and southern Hunan. They are distributed restrictedly in carbonate platform and were formed during the beginning of transgression in earliest Carboniferous, corresponding to the foraminifera Unilocular Zone and the coral Interval Zone between Devonian Cystophrentis and Carboniferous Uralinia Zones. This microbialite, 7 to 30 m thick, consists mostly of oncolites and part clotted intraclasts with stripped and nodular appearance. It is similar to those occurred after the Latest Ordovician extinction event in western North America, and after the PermianTriassic extinction in extensive area of the eastern Tethys and Panthalassa. Thus, the microbialite resurgence in association with low diversity ecosystems must be a common feature of post-extinction. The results would provide again a window into the patterns and processes of marine ecosystem restoration following the mass extinction.关键词
微生物沉积/汉根卑尔格事件/泥盆-石炭系界线/核形石/凝块石/湖南/中国Key words
microbial sediments/ Hengenberg event/ Devonian-Carboniferous boundary/ oncolite/intraclast/ thrombolite/ Hunan/ China引用本文复制引用
侯鸿飞,周怀玲,刘建波..湖南台地泥盆纪末绝灭事件后的微生物沉积[J].地质学报,2011,85(1):145-156,12.基金项目
本文为中国科学技术部《中国地层立典剖面及若干断代全球界线层型》项目(编号 2006FY120300 )和中国地质调查组局《中国主要断代地层建阶研究》专项资助的成果. （编号 2006FY120300 ）
