【摘要】 晚新元古代至早寒武世是地球演化历史上极其重要的时期,该时期地层岩石地球化学特征以及对古海水、古大气、古气候等方面的研究一直是国际地学界的关注热点。利用电感耦合等离子体质谱（ICP-MS）分析了黔东南板溪群乌叶组中的微量元素地球化学特征。结果表明:乌叶组的稀土总量较高,为64.28×10^-6～293.84×10^-6,LREE/HREE比值相对稳定,介于3.83～12.35之间;在不同类型岩性中,稀土含量和配分模式变化不大,样品测试结果中出现Eu的负异常。乌叶组的δCe值从0.95～1.04,表明原岩黑色岩系形成于缺氧的还原沉积环境。更多还原

【Abstract】 Late Neoproterozoic to Early Cambrian is a very important period in the history of the evolution of the earth.The rock geochemical characteristics of this period and the research on the ancient sea,ancient atmosphere,ancient climate and other aspects have been a hotspot in the international geosciences community.In this paper,inductively coupled plasma mass spectrometry（ICP-MS） was used to analyze REE geochemical characteristics in the formation of Wuye Group,Qiandongnan.The results showed that the total rare earth content in the Wuye Group was 64.28×10^-6 to 293.84×10^-6,LREE/HREE ratio was relatively stable,between 3.83 to 12.35;in different types of lithology,rare earth content and distribution patterns varied little,but the samples showed negative Eu anomalies.The delta Ce values of the Wuye Group were from 0.95 to 1.04,indicating that the protolith black rock series were formed in the anoxic sedimentary environment.更多还原