天津蓟县系铁岭组叠层石中微体化石的发现及其意义  

DISCOVERY AND SIGNIFICANCE OF THE MICROFOSSILS FROM THE STROMATOLITE IN THE TIELING FORMATION,JIXIANIAN SYSTEM, TIANJIN

作　　者：张晓飞[1] 曹阳[1] 杨耀栋[1] 翟子梅 马婵娟 ZHANG Xiaofei;CAO Yang;YANG Yaodong;ZHAI Zimei;MA Chanjuan(Tianjin Geology and Minerals Testing and Analysis Center,Tianjin 300191,China;Tianjin Geological WelfareCenter,Tianjin 300040,China)

机构地区：[1]天津市地质矿产测试中心,天津300191 [2]天津市地质事务中心,天津300040

出　　处：《微体古生物学报》2022年第3期201-212,共12页Acta Micropalaeontologica Sinica

摘　　要：天津蓟县系铁岭组叠层石因其出露完整,形态丰富,备受地质工作者的关注,是“蓟县中上元古界标准剖面”中研究程度较高的叠层石组合。本文主要介绍发现于铁岭组贝加尔贝加尔叠层石(相似形)Baicalia cf. baicalia(Maslov) Krylov中的微体化石, 4属4种,它们分别是:膨大蓝丝菌(相似种) Cyanonema cf. inflatum Oehler,大型冈弗林特藻Gunflintia grandis Barghoorn,粗壮管状丝藻Siphonophycus robustum schopf,以及变异角球藻(相似种)Cornosphaeria cf. variabilis Zhu。本次发现填补了蓟县剖面中叠层石碳酸盐岩中的微生物化石空白,为研究前寒武纪以叠层石为代表的微生物碳酸盐岩所经历的漫长而复杂的地质历史演变提供了宝贵的材料,佐证了叠层石的生物沉积构造。The stromatolite in the Tieling Formation of the Jixianian System in Tianjin has drawn the attention of geologists and paleontologists because of its complete outcrops and rich morphology. It is a highly studied stromatolite combinations in the “Middle–Upper Proterozoic standard section in Jixian”. This article mainly introduces the cyanobacterial fossils found from the Baicalia cf. baicalia(Maslov) Krylov in the Tieling formation, which belong to four genera and four species. They are Cyanonema cf. inflatum Oehler, Gunflintia grandis Barghoorn, Siphonophycus robustum schopf and Cornosphaeria cf. variabilis Zhu. This discovery fills the gap in the microbial fossils of Carbonate stromatolites in the “Jixian County Section”, and provides valuable information for studying the long and complex geological history evolution of microbial carbonates represented by stromatolites in the Precambrian, which corroborates the biological sedimentary structure of stromatolites.

关 键 词：叠层石 微体化石 中元古代 铁岭组 蓟县系 

分 类 号：Q913.2[天文地球—古生物学与地层学]