贵州瓮安北斗山震旦系陡山沱组瓮安生物群沉积微相特征  

Sedimentary Micro-facies Characters of Weng'an Biota in Doushantuo Formation,Sinian System in Beidoushan,Weng'an

作　　者：龙建喜 谯文浪 于宁 黄芳 

机构地区：[1]贵州省地质调查院,贵州贵阳550005

出　　处：《贵州地质》2011年第3期167-172,共6页Guizhou Geology

基　　金：瓮安生物群地质遗迹调查与评价项目(黔国土资发2006[143])

摘　　要：本文通过对贵州瓮安北斗山石人坳、大塘剖面野外实测取样结合室内镜下岩石组构特征分析,并根据Flugel《石灰岩微相分析》镶边碳酸盐岩台地模式相带归类,归出8个沉积微相类型;揭示瓮安生物群赋存地层陡山沱组的沉积微相特征:陡山沱组由下到上经历了3次潮下坪—中潮坪—潮上坪的水动力能量强弱交替、海水向上变浅的古地理环境。In this paper,by the field test and sample of Shirenao and Datang section,with the under microscope analyses of association and structure feature of rock,according to edging carbonate rock platform pattern in ＇Microfacies Analysis of Limestones＇ of Fluget,8 sedimentary facies types are divided.It reveals the sedimentary micro-facies characters of Weng＇an biota in Doushantuo formation： from bottom to top,the Doushantuo formation experienced three times＇ paleogeographic environment of low tidal flat-middle tidal flat-up tidal flat,which the water power altered and the sea water became shallow to the top side.

关 键 词：瓮安生物群 沉积微相 贵州瓮安北斗山 陡山沱组 震旦系 

分 类 号：P534.31[天文地球—古生物学与地层学] P539.2[天文地球—地质学]