摘要
通过扫描电镜精细观测,在贵州遵义松林地区早寒武世黑色岩系剖面,于其底部的硅质页岩中发现了可能的细菌状化石,直径200～500nm,形态不一,具有细菌的大小和形状,有机碳含量丰富,大部分细菌含磷。通过与已有报道中具相似形态生物体的对比,认为其可能是原生的、具有细菌生物结构的微生物小球体(Microbioids),本文称之为细菌状化石。这类细菌状化石可以赋存于石英颗粒表面、石英颗粒间,甚至嵌入石英颗粒中。据前人的模拟实验推测,细菌在石英颗粒沉淀过程中可能起到过重要促进作用,这从微观上为硅质岩的形成提供了新信息。
Based on detailed observation by scanning electron microscope（SEM）,we reported a discovery that bacterial fossils may occur in the siliceous shale of the early Cambrian black rock series in the Songlin area,Guizhou Province,SW China.They are 200~500 nm in diameters and vary in shapes,characterized by the size and shape of bacteria,high in total organic carbon（TOC）,and phosphorus present in most bacteria.In comparison with the organism with similar morphology that has been reported previously,it is concluded that the fossils discovered may be the protogenetic microbioids with typical biological structure of bacteria and is called bacteria-like fossils in this study.These fossils occur mainly in surfaces of quartz grains,inter-grains and even within the quartz grains.Based on the previous simulation experiment,it can be assumed that bacteria may have played an important role in precipitation of quartz grains.The result in this study may provide new microscopic information for understanding the formation of siliceous rocks.
出处
《地质学报》
EI
CAS
CSCD
北大核心
2013年第1期20-28,共9页
Acta Geologica Sinica
基金
国家973项目(编号:2012CB214801)
国家自然科学基金项目(编号:40839910)
现代古生物学和地层学国家重点实验室(中国科学院南京地质古生物研究所)(113101)共同资助的成果
