贵州松桃黄莲寒武系都匀阶杷榔组三叶虫地层划分及意义  

THE TRILOBITE BIOSTRATIGRAPHY OF THE BALANG FORMATION,DUYUNIAN STAGE,QIANDONG SERIES(CAMBRIAN SERIES 2,STAGE 4)FROM HUANGLIAN AREA IN SONGTAO COUNTY,GUIZHOU PROVINCE AND ITS CORRELATION SIGNIFICANCE

作　　者：伍孟银[1] 赵元龙[2] 杨兴莲[2] 陈争鹏 杨光福 WU Meng-yin;ZHAO Yuan-long;YANG Xing-lian;CHEN Zheng-peng;YANG Guang-fu(School of Economics and Management,Guiyang University,Guiyang550005,China;College of Resources and Environment Engineering,Guizhou University,Guiyang550025,China)

机构地区：[1]贵阳学院经管学院,贵阳550005 [2]贵州大学资环学院,贵阳550025

出　　处：《古生物学报》2019年第4期456-462,共7页Acta Palaeontologica Sinica

基　　金：国家自然科学基金(41662001,41772021);国家科技部基金(2015FY310100-5);中国地质调查局地质调查项目(DD20160120-04);贵阳市财政支持贵阳学院学科与硕士点建设项目(JG-2019);贵州省科技计划项目(黔科合平台人才[2017]5788号)联合资助。

摘　　要：贵州松桃县黄莲村西的黄莲剖面杷榔组厚417.8m,主要由深灰色钙质泥岩组成,岩性与湘西、黔东杷榔组基本相似,除底部38m未见三叶虫外,以上均含有三叶虫,由下而上可分为2个三叶虫带,下为Oryctocarella duyunensis带(38-83m),化石较少;上为Oryctocarella duyunensis-Arthricocephlus chauveaui组合带(83 m以上)。除Arthricocephlus chauveaui外,还含有A.xinzhaiheensis,Oryctocarella duyunensis,O.sibirica?,O.balangensis,Duyunaspis duyunensis,Changaspis elongata及Redlichia (Pteroredlichia)murakamii。与剑河交榜潜在的寒武系第四阶国际层型剖面下部2个三叶虫带Oryctocarella duyunensis-Arthricocephlus chauveaui组合带及Oryctocarella duyunensis带完全相同,也可和格陵兰北部Freachen land及Peary land等地Henson Gletscher组对比。黄莲剖面是潜在的寒武系第四阶国际层型剖面剑河交榜杷榔组剖面的良好辅助剖面。The Huanglian section located in the west of Huanglian village, Songtao County, Guizhou Province was the basic section for establishing the Nangaoan Stage and the Duyunian Stage by Peng Shanchi et al.in 2000.We restudy some materials collected from the Balang Formtion of the Huanglian section eighteen years ago.The Balang Formtion in Huanglian section consists of dark gray and grayish black silty mudstone. Its thickness is 417.8 m.The lithology of the Balang Formation in Huanglian is similar to that of the Balang Formation in east Guizhou and west Hunan.The trilobites are very abundant except the lower part from the base boundary to 38 mand two trilobite zones are defined according to the collected data:Oryctocarella duyunensis Zone,occupies lower part of the Balang Formation from38 m to 83 m above the base;Arthricocephlus chauveaui Zone,occupies middle-upper part of the Balang Formation from 83 mto the upper unit,the"Tsinghsutung Formation",including Arthricocephlus chauveaui, A. xinzhaiheensis,Oryctocarella duyunensis, O. sibirica?, O.balangensis,Duyunaspis duyunensis,Changaspis elongata and Redlichia(Pteroredlichia)murakamii.The trilobite biostratigraphy of the Balang Formation at the Huanglian section is exactly the same as that of the Balang Formation at the Jiaobang section which is the potential Global Standard Stratotype-section and Point(GSSP)for the base of the Cambrian Stage 4 and can correlate with the Henson Gletscher Formation in Freachen land and Peary land of North Greenland.The Huanglian section is a good supplementary section of the Jiaobang section for the Balang Formation.

关 键 词：三叶虫地层划分 寒武系第四阶 都匀阶 黄莲 松桃 贵州 

分 类 号：Q915.2[天文地球—古生物学与地层学]