燕夔,李军

• 1:中国科学院南京地质古生物研究所
• 2:中国科学院南京地质古生物研究所 江苏南京210008
• 3:江苏南京210008

摘要(Abstract)：

桐梓红花园剖面奥陶纪地层出露完整,化石丰富,层序清楚。该剖面湄潭组5个笔石带中有疑源类化石31属49种,根据其组成和相对丰度不同划分为5个疑源类组合带:组合带的属、种较为单调,且丰度不高;组合带中Polygonium占优势,伴有Arbusculidium;组合带以大量Stelliferidium的出现为特征;组合带与组合带相似;组合带中Leiosphaeridia的含量比Polygonium高,产特征分子Coryphidiumelegans。桐梓红花园湄潭组疑源类组合与中欧、北非、中东、南亚、北美纽芬兰东部、南美等环冈瓦纳地区同期疑源类组合相似,证实华南地区属于环冈瓦纳疑源类古地理分区。部分奥陶纪疑源类分子,如Ampullulaerchunensis、Arkonia、Dicrodiacrodium和Leprotolypaevexa等在桐梓红花园剖面的首现(FAD)较全球其他地区早。

关键词(KeyWords)： 疑源类;早、中奥陶世;湄潭组;华南;生物地层

Abstract:

Keywords:

基金项目(Foundation): 1国家重点基础研究发展规划项目(G2000077700、2003CB716805);; 国家自然科学基金(No.40372009);; 中国科学院创新基金(KZCX2-SW-130)联合资助。

作者(Author): 燕夔,李军

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