西南地区晚三叠世卡尼期牙形石研究进展  

Progresses on Carnian(Late Triassic)Conodont Study in Southwest China

作　　者：张再天 孙亚东 赖旭龙[3] Zhang Zaitian;Sun Yadong;Lai Xulong(College of Marine Science and Technology,China University of Geosciences,Wuhan 430074,China;GeoZentrum Nordbayern,Universitat Erlangen-Nurnberg,Erlangen 91054,Germany;State Key Laboratory of Biogeology and Environmental Geology,China University of Geosciences,Wuhan 430074,China)

机构地区：[1]中国地质大学海洋学院,湖北武汉430074 [2]埃尔朗根-纽伦堡大学北拜仁州地质中心,拜仁州埃尔朗根91054 [3]中国地质大学生物地质与环境地质国家重点实验室,湖北武汉430074

出　　处：《地球科学》2018年第11期3955-3975,共21页Earth Science

基　　金：国家自然科学基金项目(Nos.41830320;41602026;41572002);国家重点研发计划项目(No.2016YFA0601100);"111"引智计划项目(No.B08030)

摘　　要：我国西南地区海相中-上三叠统沉积记录良好,但晚三叠世卡尼期牙形石生物地层划分和对比研究较为薄弱.通过对云南省罗平县和贵州省贞丰县、关岭县等地4条剖面的杨柳井组、竹杆坡组以及瓦窑组进行高精度的牙形石采样,以及牙形石生物地层学和系统分类学研究,共描述牙形石3属23种.结合前人研究材料,由下至上共建立了8个牙形石带,分别为:Paragondolella foliata带,Quadralella polygnathiformis带,Quadralella tadpole带,Quadralella praelindae带,Quadralella aff.auriformis带,Quadralella robusta带,Quadralella noah带和Quadralella ex gr.carpathica带.以此为基础,对西南地区卡尼期地层进行区域内和跨大区的对比和划分研究以及对牙形石分子演化规律进行探讨.Marine depositions in Southwest China were well developed during the Middle to Upper Triassic. However, conodont biostratigraphic subdivision and correlation in the Late Triassic （Carnian age） are less systematically studied. Based on high- precision conodont samples collected from Yangliujing, Zhuganpo and Wayao formations in Luoping, Guanling and Zhenfeng counties, detailed conodont biostrtagraphic and systematic taxonomy researches were conducted, and twenty three species and three genera were reeongnized. Eight conodont zones were established, they are, in ascending order, the Paragondolella foliata zone, the Quadralella polygnathiformis zone, the Quadralella tadpole zone, the Quadralella praelindae zone, the Quadralella aff. auriformis zone, the Quadralella robusta zone, the Quadralella noah zone and the Quadralella ex gr. carpathica zone. Based on the published and obtained materials, a further discussion on conodont biostratigraphic subdivision and regional correlation in area and realm and eonodont evolution are also presented in this study.

关 键 词：牙形石 晚三叠世卡尼期 生物地层学 地层对比 西南地区 地层学 

分 类 号：P52[天文地球—古生物学与地层学] P534[天文地球—地质学]