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右江盆地西北缘安然背斜东段奥伦尼克期牙形石生物地层研究及意义
投稿时间:2020-03-25  修订日期:2020-05-09  点此下载全文
引用本文:
DOI:10.19762/j.cnki.dizhixuebao.2020097
摘要点击次数: 119
全文下载次数: 155
作者单位地址
向坤鹏 贵州省地质调查院 贵阳市石林西路171号地质科技园7栋809室
安亚运 贵州省地质调查院 
贺永忠 贵州省地质调查院 
赵磊 贵州省地质调查院 
刘奎勇 贵州省地质调查院 
盘应娟 贵州省地质调查院 
易成兴 贵州省地质调查院 
基金项目:本文受中国地质调查局项目(DD20160020)、贵州省地质矿产勘查开发局科研项目(编号:QDKKH[2017]28)、贵州省科学技术厅项目《贵州省地质调查院院士工作站》(编号:QKHPTRC[2018]5626)联合资助。
中文摘要:内容提要:罗楼组上部灰岩段是右江盆地西北缘奥伦尼克期海生爬行动物化石的唯一赋存层位,生物地层研究精度较低。本文以安然背斜东段者堡、敢南一带罗楼组为研究对象,通过剖面测制,对该组上部灰岩段进行系统的牙形石生物地层研究。结果显示,奥伦尼克期包含5个牙形石带,自下而上依次为:Neospathodus pakistanensis带,Novispathodus waageni带,Neospathodus crassatus带,Icriospathodus collinsoni带以及Triassospathodus homeri-Tr. symmetricus组合带,区内海生爬行动物主要产于Triassospathodus homeri-Tr. symmetricus组合带。该研究结果为罗楼组上部灰岩段海生爬行动物群时代的限定提供可靠的生物依据,为进行奥伦尼克期海生爬行动物群产出层位的精细对比提供佐证。
中文关键词:罗楼组  奥伦尼克期  牙形石生物地层  安然背斜东段  右江盆地西北缘
 
The Conodont Biostratigraphic Study and Its Significance of the Olenekian Stage, Eastern of the Anran Anticline, Northwest Margin of Youjiang Basin
Author NameAffiliationAddress
XIANG Kunpeng Guizhou Geological Survey,Guizhou Guiyang 550081
China 
贵阳市石林西路171号地质科技园7栋809室
AN Yayun Guizhou Geological Survey,Guizhou Guiyang 550081
China 
HE Yongzhong Guizhou Geological Survey,Guizhou Guiyang 550081
China 
ZHAO Lei Guizhou Geological Survey,Guizhou Guiyang 550081
China 
LIU Kuiyong Guizhou Geological Survey,Guizhou Guiyang 550081
China 
PAN Yingjuan Guizhou Geological Survey,Guizhou Guiyang 550081
China 
YI Chengxing Guizhou Geological Survey,Guizhou Guiyang 550081
China 
Abstract:The upper limestone member of Luolou Formation is in low degree of biostratigraphic study, also the only occurrence horizon of the marine reptile, Olenekian Stage, northwest margin of Youjiang Basin. This article focused on the upper limestone member of Luolou Formation in Zhebao and Gannan region, respectively, eastern of the Anran anticline, based on the section and systematic conodont biostratigraphic study, the results show the Olenekian Stage contains 5 conodont zones from the bottom up as follows: The Neospathodus pakistanensis zone, the Novispathodus waageni zone, the Neospathodus crassatus zone, the Icriospathodus collinsoni zone and the Triassospathodus homeri-Tr. symmetricus assemblage zone, the marine reptiles in northwest margin of Youjiang Basin mainly belongs to the Triassospathodus homeri-Tr. symmetricus assemblage zone. The results of this study not only provide reliable biological basis for age limit of the reptile fauna in the upper limestone member of Luolou Formation, but also provide evidence for careful comparison of occurrence horizon of the marine reptile fauna, Olenekian Stage.
keywords:Luolou Formation  Olenekian Stage  Conodont biostratigraphic  Eastern of the Anran anticline  Northwest margin of Youjiang Basin
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