开展华北地台古元古代早期微古植物群与真核生物研究  

Research on Microflora and Eucaryotic Algal Fossils of the Earliest Paleoproterozoic in North China Block

作　　者：孙淑芬[1] 牛绍武[1] 辛后田[1] 

机构地区：[1]中国地质调查局天津地质矿产研究所,天津300170

出　　处：《前寒武纪研究进展》2001年第2期111-115,共5页Progress in Precambrian Research

摘　　要：深入开展古元古代早期 (2 5 0 0～ 180 0Ma)微古植物化石研究 ,查清其产出层位、种属组成、组合特征、时空分布规律等 ,在古元古代晚期长城系层位之下建立一个目前世界上时代最老、层位最低的真核生物的微古植物化石组合 ,这是在国内外该时期生物地层学研究中一个全新的课题和极待解决的问题。通过比较形态学、分子古生物学和古生态学研究 ,查清微古植物群中真核生物的生物学属性 ,追索真核生物产出的最低层位 ,探索真核生物的起源 ,为探讨地球早期生命演化提供直接的化石证据。开展古元古代早期微古植物群研究和探讨真核生物的起源 ,不但具有地层划分与对比的实际价值 。The proterozoic strata of Jixian Section is subdivided into Changcheng System(1 800 Ma-1 400 Ma), Jixian System(1 400 Ma-1 050 Ma), and Qingbaikou System(1 050 Ma-800 Ma), rich in the stromatolites, microflora,megascopic algae, and trace fossils. The microflora in above mentioned strata have been well studied by many Palaeontologists. However, the microflora from Hutuo Group of the earliest Palaeoproterozoic in Wutaishan, Shanxi Provice, China has been only tentatively researched by professor Sun Shufen,including Trachysphaeridium minor,T.acis,T.planum,T.pusillum,Turuchania alara,T.ternate, Siphonophycus kestron,S.capitaneum,Leioaracnium sp., Kildinella hyperboreica, Asperatopsophosphaera balensis, A.umishanensis, Triangumorpha crassa, Taeniatum crassum,Eomycetopsis filiformis from Dashiling Formation, and Leiominuscula incrassata, Trachysphsphaeridium simplex,T.planum,T.minor, Taeniatum crassum, Polysphaeroides formosus, Siphonophycus capitaneum,S. kestron,Favososphaeridium favosum,F.densum,Pseudofavososphaera obsolete,Asperatopsophosphaera umishanensis,Micrconcentrica induplicate,Leiosphaeridia ballica, L.aperta from Qingshicun Formation. Acording to the comparative morphological research,shuttle,triangular,oval,and elliptical types of microflora from Hutuo Group have been considered belonging to probably eucaryotics.Through the study of molecular palaeontology, we can be distinguished eucaryotics from the micriflora in Hutuo Group.The study of microflora from Hutuo Group not only possesses important theorecal significance, but also is of great practice value.

关 键 词：古元古代早期 微古植物群 真核生物 华北地台 时空分布 古生态学 

分 类 号：Q914.8[天文地球—古生物学与地层学]