唐山地区寒武系第二统与苗岭统界线的初步研究兼论与江南斜坡区和华北地台区的对比  

A PRELIMINARY STUDY ON THE BOUNDARY BETWEEN THE CAMBRIAN SERIES 2 AND MIAOLINGIAN SERIES IN TANGSHAN AREA,WITH DISCUSSION ON CORRELATION BETWEEN JIANGNAN SLOPE AND NORTH CHINA PLATFORM

作　　者：高健 袁金良[2] GAO Jian;YUAN Jin Liang(State Key Laboratory of Palaeobiology and Stratigraphy,Nanjing Institute of Geology and Palaeontology,Chinese Academyof Sciences,Nanjing210008;Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences,Nanjing 210008)

机构地区：[1]现代古生物学和地层学国家重点实验室,中国科学院南京地质古生物研究所,江苏南京210008 [2]中国科学院南京地质古生物研究所,江苏南京210008

出　　处：《地层学杂志》2023年第2期119-131,共13页Journal of Stratigraphy

基　　金：贵州省科技基金(黔科合支撑[2020]4y241号)资助。

摘　　要：本文以唐山地区寒武系第二统与苗岭统界线附近获得的三叶虫新资料为依据,以丰润区左家坞镇古仁庄剖面为唐山地区寒武系苗岭统和乌溜阶底界的代表剖面,自下而上建立了Laoyingshaniatriangularis带、Luaspides lingyuanensis带、Plesiagraulos tienshihfuensis带。古仁庄剖面Luaspides lingyuanensis带底部和全球界线层型剖面——乌溜—曾家崖剖面Oryctocephalusindicus带底部共同产出Danzhaiaspisintermedius和Parashuiyuella,从而限定了Luaspides lingyuanensis带底界的时代范围,并以此带的开始为唐山地区寒武系苗岭统和乌溜阶的底界。本文通过与同时期华北、华南和年代地层系统对比,确定华北地台区redlichiid三叶虫的灭绝时间不是同时的;同时,简述了华北地区寒武系第二统上部到乌溜阶下部三叶虫古生物地理的分布规律。Based on new material of trilobites from the Cambrian Series 2-Miaolingian boundary interval in Tangshan area(including Kaiping Basin and Fengrun area),Hebei Province,a trilobite succession with three zones in ascending order:Laoyingshania triangularis Zone,Luaspides lingyuanensis Zone and Plesiagraulos tienshihfuensis Zone has been recognized for the first time.Based on the occurrence of Danzhaiaspis intermedius and Parashuiyuella within a short interval in Gurenzhuang Section,the base of Luaspides lingyuanensis Zone can be correlated with base of Oryctocephalus indicus Zone which also contains Danzhaiaspis and Parashuiuella in Wuliu-Zengjiayan Section(the GSSP for the Wuliuan Stage).The FAD of Luaspides lingyuanensis in Tangshan area,North China coincides probably equivalently with the FAD of Oryctocephalus indicus.Correlation of the trilobite zonations for the Cambrian Serise 2-Miaolingian boundary interval in the North China Platform and Jiangnan Slope Belt has been suggested as shown in Fig.6.We conclude that disappearance of the redlichiid trilobite in North China Platform is not synchronous.Moreover,palaeobiogeographic subdivision of the North China Platform during the Cambrian Series 2 and Miaolingian Series boundary interval in Tangshan area has been briefly discussed.

关 键 词：华北地台 苗岭统 乌溜阶 地层划分和对比 古生物地理 

分 类 号：P534.41[天文地球—古生物学与地层学]