辽宁大连复州湾寒武系芙蓉统微生物岩特征研究  

STUDY ON THE CHARACTERISTICS OF CAMBRIAN FURONGIAN MICROBIOLITES IN FUZHOUWAN,DALIAN,LIAONING PROVINCE

作　　者：韩作振 刘佳业 张晓蕾 王兆鹏 HAN Zuozhen;LIU Jiaye;ZHANG Xiaolei;WANG Zhaopeng(College of Earth Sciences and Engineering,Shandong University of Science and Technology,Qingdao 266590,China;Nanjing Institute of Geology andPalaeontology,Chinese Academy of Sciences,Nanjing 210008,China)

机构地区：[1]山东科技大学地球科学与工程学院,青岛266590 [2]中国科学院南京地质古生物研究所,南京210008

出　　处：《微体古生物学报》2021年第2期140-148,共9页Acta Micropalaeontologica Sinica

基　　金：国家自然科学基金项目“鲁西地块寒武系微生物灰岩白云石化机理及地质意义”(41972108)的资助。

摘　　要：辽宁复州湾剖面寒武系地层出露连续且沉积现象较为丰富,芙蓉统长山组、凤山组微生物岩发育。研究区寒武系芙蓉统微生物岩多为小型柱状,与围岩有明显界限,纹层较为模糊,与华北其他地区寒武系芙蓉统大型柱状叠层石有明显差异。芙蓉统微生物岩主要由暗色致密泥晶和微亮晶颗粒组成,内部发育有生物碎屑、白云石、方解石和黄铁矿颗粒等,显示出微生物岩内部复杂的显微组构,同时柱状微生物岩中保存多种类型的微体生物,如葛万菌(Girvanella)、肾形菌(Renalcis)等钙化蓝细菌,以及海绵骨针集合体等。致密泥晶组构中粘结着大量的生物碎屑,包括三叶虫和腕足类等。因此,复州湾剖面芙蓉统微生物岩中发育的钙化微生物和多样性颗粒的存在,为探索生物丘形成过程中复杂的微生物沉积作用的研究提供了基本素材,也为寒武系叠层石的研究提供了重要的实例。The Cambrian Furongian microbial carbonates from the Fuzhouwan of Liaoning area are flourished,where the Cambrian strata are exposed continuously.Different from the large columnar stromatolites of Cambrian Furongian in other areas of North China,the microbiolites in the studied area are mostly small mound shaped,crudely laminated,and clear boundary with surrounding rocks.The Furongian microbiolites is mainly composed of dark micrite and Sparry grains,including bioclasts,dolomite,calcite,pyrite particles,showing the complex microfabrication inside the microbial rock.The microbial carbonates were mostly constructed by calcified microbes(cyanobacteria),mainly Girvanella,Renalcis and spongy spicule aggregates.A large number of bioclasts,including trilobites and brachiopods,are bonded in the dense micrite fabric.Therefore,the existence of calcified microorganisms and diverse particles developed in the hibiscus microbiome in the Fuzhouwan profile provides basic materials for the study of complex microbial deposition during the formation of biohermes,also provides an important example for the study of Cambrian stromatolites.

关 键 词：海绵 钙化微生物 微生物岩 芙蓉统 寒武系 

分 类 号：Q913[天文地球—古生物学与地层学]