李超,樊隽轩,孙宗元

• 1: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中心现代古生物学和地层学国家重点实验室
• 2:中国科学技术大学
• 3:中国科学院大学

摘要(Abstract)：

近四十年来,化学地层学,如碳同位素地层学,在古生界地层的划分与对比中获得了广泛的应用,特别是在不同岩相、生物相的地区间对比时发挥了极其重要的作用。目前,在欧洲大陆和美洲大陆均已获得了较为详细的奥陶系无机碳同位素数据,建立了较为可靠的区域和全球对比关系,并据此初步绘制出全球奥陶系δ13Ccarb标准化曲线,共识别出16个同位素事件,其中3个为负漂事件。近年来,在中国华南和塔里木地区也先后识别出个别重要的无机碳同位素事件,但总体来看,还需基于连续露头或钻井、高精度采样建立完整的无机碳同位素曲线,从而建立准确的区域和全球对比。碳同位素作为一种重要的地层对比手段,在奥陶系长时间尺度的区域和全球高精度地层对比中正逐渐发挥重要作用。同时,碳同位素记录在地质历史中生物与环境协同演化研究中也具有不可替代的意义。

关键词(KeyWords)： 化学地层学;无机碳同位素;全球对比;奥陶系

Abstract:

Keywords:

基金项目(Foundation): 国家重大专项(2017ZX05035002-001);; 国家自然科学基金(41521061);; 中国科学院B类先导专项(XDPB05和XDB10010100)共同资助

作者(Author): 李超,樊隽轩,孙宗元

DOI: 10.19839/j.cnki.dcxzz.2018.04.005

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