| 湖南台地泥盆纪末绝灭事件后的微生物沉积 |
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| 引用本文： | 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. |
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| 作者姓名： | 侯鸿飞 周怀玲 刘建波 |
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| 作者单位： | -,-,- |
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| 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 |
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| 摘 要： | 湖南中南部浅水碳酸岩台地,泥盆系顶部假整合面之上,石炭纪海进最早期,相当四射珊瑚Cystophrentis-Uralinia间隔带和单房室有孔虫带的层位,普遍发育厚度不等(7~30m)的微生物沉积.宏观上为条带状或斑块、瘤状构造,大部分由核形石组成,局部发育凝块构造内碎屑.它们均属微生物成因,代表汉根卑尔格绝灭事件后(...
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| 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 |
| 收稿时间： | 2010/5/19 0:00:00 |
| 修稿时间： | 2010/5/19 0:00:00 |
Microbial sediments occurring after the end-Devonian extinction event on the Hunan Platform |
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| houhongfei,Zhouhuailing and liujianbo.Microbial sediments occurring after the end-Devonian extinction event on the Hunan Platform[J].Acta Geologica Sinica,2011,85(1):145-156. |
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| Authors: | houhongfei Zhouhuailing and liujianbo |
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| 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 Permian-Triassic 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. |
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| Keywords: | microbial sediments Hengenberg event Devonian-Carboniferous boundary oncolite intraclast thrombolite Hunan China |
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