湖北宜昌奥陶纪特马豆克期晚期—桑比期早期牙形刺多样性初探  

ORDOVICIAN CONODONT DIVERSIFICATION OF YICHANG, HUBEI PROVINCE

作　　者：王志浩[1] 吴荣昌[1] 

机构地区：[1]中国科学院南京地质古生物研究所,南京210008

出　　处：《古生物学报》2007年第4期430-440,共11页Acta Palaeontologica Sinica

基　　金：中国科学院资源环境领域知识创新工程重要方向项目(KZCX3-SW-149);国家973项目第二课题(2006CB806402)联合资助;IGCP503项目的成果之一

摘　　要：根据前人发表的和作者现有资料,对宜昌地区奥陶系南津关组至庙坡组(Tremadocian-early Sandbian)所报道的牙形刺属种进行厘定,并根据牙形刺带进行统计分析,初步编制出牙形刺属种的地层延限图。研究表明,牙形刺在奥陶纪的宏演化经历了3次较为明显的辐射事件,分别发生在早奥陶世晚期,Darri wilian期中期和中、晚奥陶世之交,并都与局部环境的变化有关。After restudy on Ordovician conodont taxonomy and ranges of the conodont species based on the data published before and at the authors＇ hand, the stratigraphical ranges of conodonts in the every conodont zone from the Ordovician of Yichang,Hubei are summarized herein. In Ordovician, three major conodont bio-events can be recognized in this area. These conodont bio-events occurred during the late Early Ordovician, Mid-Darriwilian and Middle-Upper Ordovician boundary. The conodont radiation in the study area reached its acme, respectively at the late Early Ordovician, Mid-Darriwilian and Middle-Upper Ordovician boundary.

关 键 词：牙形刺 多样性 生物事件 辐射 奥陶纪 宜昌 

分 类 号：Q915[天文地球—古生物学与地层学]