【作者】 潘家永； 马东升； 曹双林； 夏菲； 陈少华； 吴凯；

【Author】 PAN Jiayong~1,2) MA Dongsheng~1) CAO Shuanglin~1,2) XIA Fei~1,2) CHEN Shaohua~2) WU Kai~1) 1)State Key Laboratory for Mineral Deposits Research,Nanjing University,Nanjing,Jiangsu,210093;2)East China Institute of Technology,Fuzhou,Jiangxi,344000

【机构】 南京大学内生金属矿床成矿机制研究国家重点实验室； 东华理工学院；

【摘要】 本文对湘西三岔、杆子坪与贵州织金3个震旦纪—早寒武世深水相剖面进行了系统的碳氧同位素研究,研究表明,这3个剖面下寒武统底部都出现明显的占δ¹³C 负漂移。其δ¹³C 在剖面上的变化规律与全球浅海相碳酸盐剖面相似。这可能是下寒武统海洋生物产率的降低而导致沉积碳酸盐的δ¹³C 负漂移。更多还原

【Abstract】 Carbon and oxygen isotopic records from three deep-water facies sections（Sancha,Ganziping and Zijin）of the Precamb-rian-Cambrian transitional period in South China were studied in this paper.It is shown that there exist clear negative δ¹³C anomaliesat the bottom of Early Cambrian strata in the three deep-water facies sections,whose characteristics are similar to those of shallow-water facies sections all over the world.The negative δ¹³C shift at the bottom of Early Cambrian might have been caused by decreaseof bio-productivity.更多还原