湖北恩施老寨溪剖面早志留世纱帽组牙形刺生物地层研究  

Study on the Silurian Shamao Formation Conodont Biostratigraphy of the Laozhaixi Section in Enshi,Hubei

作　　者：李朋 谢应波 周峰 吴龙 Li Peng;Xie Yingbo;Zhou Feng;Wu Long(Hubei Geological Survey,Wuhan,Hubei430034)

机构地区：[1]湖北省地质调查院,湖北武汉430034

出　　处：《资源环境与工程》2021年第1期8-12,19,共6页Resources Environment & Engineering

基　　金：中国地质调查局大调查项目(项目编号:12120114066101);中国地质调查局扬子工程湘西—鄂西成矿带神农架—花垣地区地质矿产调查二级项目(项目编号:DD20160029)。

摘　　要：鄂西志留纪纱帽组上部是否跨统一直存在争议。在湖北恩施老寨溪剖面纱帽组上部的一套泥质粉砂岩夹灰岩透镜体中发现大量牙形刺。经过系统鉴定,将其自下而上划分出三个牙形刺化石带:Pterospathodus eopennatus带、Pterospathodus celloni带和Pterospathodus amorphognathoides amorphognathoides带,判断属于兰多维列统晚期,未到文洛克统。The interval scale problem of the Silurian formation in western Hubei has been controversial in recent years.In this paper,a set of argillaceous siltstones with limestone lens bodies was found in the upper part of the Laozhaixi section in Enshi,Hubei.Stratigraphic research provides the foundation.After systematic sampling and identification,the limestone section can be divided into three conodont fossilized belts from the bottom to the top:the Pterospathodus eopennatus belt,the Pterospathodus celloni belt and the Pterospathodus amorphognathoides amorphognathoides belt.The geological age belongs to the late stage of Landuowei series,it has not yet arrived Wenlock.

关 键 词：牙形刺 生物地层 纱帽组 老寨溪 

分 类 号：Q911.6[天文地球—古生物学与地层学]