周光照,陈雷,李光金,庞科,汉春梅,阳乐,孙康,尹磊明,杨锋杰

• 1:山东科技大学地球科学与工程学院
• 2:中国科学院南京地质古生物研究所和生物演化与环境卓越创新中心现代古生物学和地层学国家重点实验室

摘要(Abstract)：

由于缺乏可靠的定年材料,鲁西地区元古代地层土门群佟家庄组的沉积时代一直存在争议。本文通过碎屑锆石测年与微体化石相结合的方法,对其沉积时代进行约束。结果显示佟家庄组顶部粉砂岩的碎屑锆石~(207)Pb/~(206)Pb最小年龄为1063±53Ma,限定了其沉积下限。从佟家庄组黄绿色页岩中获得有机质壁微体化石9属19种,具有中元古代中期至新元古代早期微体化石组合特征,并可与徐淮地区新元古代拉伸纪(Tonian)地层刘老碑组、沟后组的微体化石组合对比。因此,本文结合碎屑锆石最小年龄与微体化石组合特征,限定佟家庄组沉积时代为新元古代拉伸纪。

关键词(KeyWords)： 碎屑锆石;微体化石;拉伸纪;佟家庄组;鲁西地区

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划(2016YFC0601001,2017YFC0603100);; 国家自然基金委(41502019,41602007);; 山东科技大学科研发展基金(2015YQJH102)共同资助

作者(Author): 周光照,陈雷,李光金,庞科,汉春梅,阳乐,孙康,尹磊明,杨锋杰

DOI: 10.19839/j.cnki.dcxzz.2019.03.001

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