| 贵州梵净山地区震旦系微量元素特征及沉积环境 |
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| 关键词:REE trace element Ce, Eu anomaly sedimentary environment water column stratification |
| 基金项目:国家自然科学基金“广丰新元古代早期裂谷充填楔状地层的年代学、沉积层序及对比研究”项目(编号:40472070); 中国地调局“川渝滇黔地区基础地质综合研究”项目(编号:1212010510307) |
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| Trace Element Characteristics and Sedimentary Environment of the Sinian system of the Fanjingshan Area in Guizhou Province |
| In order to study characteristics of trace elements and evolution of sedimentary environment of Fanjingshan area in Sinian,the authors systematically collected samples from Yongyi section in upward direction.The analytical results of these samples reveal that REE display LREE enrichment and HREE depletion,Ce on the whole exhibits depletion and vertical decrease,and Eu anomaly shows three times of fluctuation,suggesting a general oxidation environment during Sinian deposition,but with local variation.Furthermore,the normalized REE distribution model of cap carbonate at the bottom of Doushantuo Formation is different from that of seep carbonate,implying that they lie in different sedimentary environments and have no genetic connection.The ratios of trace elements such as V/Cr,Ni/Co,U/Th and V/V Ni indicate that the sedimentary environment during Sinian deposition was on the whole oxidization,but with vertical variation of both sedimentary environment and water column stratification. |
| XIONG Guo-qing,WANG Jian,HU Ren-fa.2008.Trace Element Characteristics and Sedimentary Environment of the Sinian system of the Fanjingshan Area in Guizhou Province[J].Acta Geoscientica Sinica,29(1):51-60. |
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