豫西登封地区寒武系苗岭统张夏组碳同位素组成特征及其地层学意义  

Carbon isotope composition characteristics and its stratigraphic significance in Zhangxia formation,Miaoliangian series of Cambrian in Dengfeng,western Henan

作　　者：仲聪聪 王敏[1] 李凯楠 樊钰超 彭深远 ZHONG Congcong;WANG Min;LI Kainan;FAN Yuchao;PENG Shenyuan(Institute of Resources and Environment,Henan Polytechnic University,Jiaozuo 454000,Henan,China)

机构地区：[1]河南理工大学资源环境学院

出　　处：《河南理工大学学报（自然科学版）》2020年第1期37-46,共10页Journal of Henan Polytechnic University（Natural Science）

基　　金：国家自然科学基金资助项目(41502106);河南理工大学博士基金资助项目(B2014-072)

摘　　要：豫西登封地区寒武系苗岭统沉积以碳酸盐岩为主,为碳同位素地层研究提供了良好的素材。本文展示了登封地区高分辨率碳同位素曲线,发现在张夏组三段和四段存在一个达到-1.5‰的负漂移,负漂移介于苗岭统鼓山阶底部的碳同位素负漂移(DICE)和芙蓉统底部的碳同位素正漂移(SPICE)之间。通过对华南、美国、澳大利亚、西伯利亚同时期地层的碳同位素进行研究,发现负漂移普遍存在,并且古丈阶与鼓山阶的分界面位于该段负漂移的最小值附近。因此,推测鼓山阶与古丈阶的分界面对应在张夏组上部的三段与四段之间。The deposition of Miaoliangian series of Cambrian in Dengfeng in western Henan is dominated by carbonate strata,which provides good materials for the study of carbon isotope strata.The high-resolution carbon isotope curve in Dengfeng area was presented in this study,and a negative excursion of-1.5‰in the third and fourth sections of Zhangxia formation was found,which was between the negative isotope carbon excursion(DICE)at the bottom of the Drumian stage of Miaoliangian series and positive isotope carbon excursion(SPICE)at the bottom of the Furongian series.Through the study of carbon isotope in the strata of south China,the United States,Australia,and Siberia,it was found that this negative excursion was widespread,and the interface between the Guzhangian stage and Drumian stage is near the minimum of the negative drift of the segment.Therefore,it was inferred that the interface between the Guzhangian stage and Drumian stage corresponded to the thick oolitic limestone in the upper part of the Zhangxia formation.

关 键 词：碳同位素 张夏组 寒武系 豫西地区 

分 类 号：P597.2[天文地球—地球化学]