王环环,马学平,Ladislav SLAVíK,魏凡,张美琼,吕丹

• 1:北京大学地球与空间科学学院造山带与地壳演化教育部重点实验室
• 2:Institute of Geology of the Czech Academy of Sciences
• 3:云南大学云南省古生物研究重点实验室
• 4:现代古生物学和地层学国家重点实验室中国科学院生物演化与环境卓越创新中心中国科学院南京地质古生物研究所

摘要(Abstract)：

华南地区早泥盆世早—中期的地层中含有较多的碎屑岩,缺少连续的灰岩剖面及牙形类化石,因此该地区洛赫科夫阶、布拉格阶和埃姆斯阶的底界均未能以牙形类确立。滇西阿冷初剖面海相碳酸盐岩发育,具备较好的牙形类生物地层研究条件。通过对该剖面牙形类的研究,确定了志留系-泥盆系的大致界线、洛赫科夫阶-布拉格阶的界线和布拉格阶-埃姆斯阶的界线,并对剖面志留系的地层进行了初步的划分。根据现有的牙形类研究将洛赫科夫阶划分为下、中、上三部分;布拉格阶的底界以Latericriodus steinachensis eta morphotype和Pseudogondwania ethingtoni的首次出现为标志,自下而上识别出了irregularis带和kindlei-pireneae带;在华南地区首次发现了埃姆斯阶底界的标志分子Eocostapolygnathus kitabicus。据此,认为山江组下部的时代属于洛赫科夫期,中上部属于布拉格期,阿冷初组的时代为埃姆斯期,龙马溪组上部可能属文洛克统,稗子田组则为文洛克统及以上的地层。

关键词(KeyWords)： 生物地层;牙形类;阿冷初组;山江组;稗子田组;下泥盆统;志留系;华南板块

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(No.41290260)资助;; partly supported by the Inst.Geol.Research plan:RVO67985831;; 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)资助(课题号143111)

作者(Author): 王环环,马学平,Ladislav SLAVíK,魏凡,张美琼,吕丹

DOI: 10.19839/j.cnki.dcxzz.2018.03.005

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