汪隆武,张元动,朱朝晖,张建芳,刘风龙,陈津华,徐双辉,蔡晓亮,马譞,胡开明

• 1:浙江省地质调查院
• 2:中国科学院资源地层学与古地理学重点实验室(中国科学院南京地质古生物研究所)

摘要(Abstract)：

通过对浙江省安吉县杭垓地区晚奥陶世地层的区域地质调查、剖面测量以及系统化石采集、鉴定与分析样品测试研究,浙江省安吉县杭垓剖面被列为"上奥陶统赫南特阶下扬子地区标准剖面"。该剖面的赫南特阶和奥陶系-志留系界线地层出露完整,发育了厚度超过360m的笔石页岩和细碎屑岩的连续旋回沉积,化石丰富,主要界线附近未见构造破坏,较完整地记录了赫南特期的地质事件和生物序列,符合建立下扬子区赫南特阶标准剖面的要求。在该剖面的上奥陶统凯迪阶—赫南特阶—志留系兰多维列统鲁丹阶的连续地层中发现丰富的笔石、几丁虫和海绵动物化石,以及部分三叶虫、腹足类、腕足类、头足类等门类化石,自下而上共识别出Dicellograptus complexus,Paraorthograptus pacificus,Normalograptus extraordinarius,Normalograptus persculptus,Akidograptus ascensus,Parakidograptus acuminatus 6个笔石带和1个Songxites-Aegiromenella壳相化石组合。在赫南特阶地层中首次发现极为丰富多样的海绵动物群,为进一步认识全球赫南特期的生物圈面貌、寒武纪生命大爆发之后的海绵生物演化打开了重要窗口。

关键词(KeyWords)： 生物地层;标准剖面;笔石带;海绵;碳同位素;文昌组;赫南特阶;安吉;浙江

Abstract:

Keywords:

基金项目(Foundation): 国土资源部中国地质调查局项目(编号:1212011220527)资助的成果

作者(Author): 汪隆武,张元动,朱朝晖,张建芳,刘风龙,陈津华,徐双辉,蔡晓亮,马譞,胡开明

DOI: 10.19839/j.cnki.dcxzz.2016.04.004

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