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贵州瓮安陡山沱组磷块岩稀土元素地球化学特征与沉积期后变化

解启来 陈多福 漆亮 陈先沛

解启来, 陈多福, 漆亮, 陈先沛. 贵州瓮安陡山沱组磷块岩稀土元素地球化学特征与沉积期后变化[J]. 沉积学报, 2003, 21(4): 627-633.
引用本文: 解启来, 陈多福, 漆亮, 陈先沛. 贵州瓮安陡山沱组磷块岩稀土元素地球化学特征与沉积期后变化[J]. 沉积学报, 2003, 21(4): 627-633.
XIE Qi lai, CHEN Duo fu, QI Liang, CHEN Xian pei. REEs Geochemistry of Doushantuo Phosphorites and Modification during Post Sedimentary Stages in Weng'an Area, South China[J]. Acta Sedimentologica Sinica, 2003, 21(4): 627-633.
Citation: XIE Qi lai, CHEN Duo fu, QI Liang, CHEN Xian pei. REEs Geochemistry of Doushantuo Phosphorites and Modification during Post Sedimentary Stages in Weng'an Area, South China[J]. Acta Sedimentologica Sinica, 2003, 21(4): 627-633.

贵州瓮安陡山沱组磷块岩稀土元素地球化学特征与沉积期后变化

基金项目: 国家重点基金(批准号:49833002)、国家自然科学基金(批准号:40273032)及中国科学院广州地球化学研究所知识创新项目(GIGCX-03-04)资助
详细信息
    作者简介:

    解启来 男 1964年出生 副研究员 博士 盆地热史 地球化学 沉积学

  • 中图分类号: P595

REEs Geochemistry of Doushantuo Phosphorites and Modification during Post Sedimentary Stages in Weng'an Area, South China

  • 摘要: 贵州瓮安陡山沱组磷块岩保存了可能是全球最早的后生动物化石 (瓮安动物群 ),对于瓮安动物群出现过程中的古海洋环境重建具有重要科学意义。但必须对成岩后生作用对磷块岩中的稀土元素改造进行评估。通过对贵州瓮安陡山沱组磷块岩的磷质碎屑、磷质和白云质胶结物、磷条带和泥条带等的稀土元素地球化学特征研究,确定沉积期后变化对稀土元素的改造影响不大。上矿层磷块岩沉积期形成的磷质碎屑、成岩期形成的白云质和磷质胶结物具相同的稀土元素配分模式,暗示了沉积期后的改造作用对瓮安陡山沱组磷块岩保存的原生沉积信息影响不大。瓮安陡山沱组磷块岩具有显著的重稀土亏损特征。磷块岩的磷质和白云质胶结物、伴生磷质碎屑、强风化磷块岩相近的ErN/LuN 比值,表明沉积期后的改造作用不是重稀土元素亏损的主要原因。磷块岩的ErN/LuN、LaN/NdN 与Ce/Ce 间的相关性,表明越氧化的沉积环境中,轻和重稀土元素亏损越强。
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目录

    贵州瓮安陡山沱组磷块岩稀土元素地球化学特征与沉积期后变化

      基金项目:  国家重点基金(批准号:49833002)、国家自然科学基金(批准号:40273032)及中国科学院广州地球化学研究所知识创新项目(GIGCX-03-04)资助
      作者简介:

      解启来 男 1964年出生 副研究员 博士 盆地热史 地球化学 沉积学

    • 中图分类号: P595

    摘要: 贵州瓮安陡山沱组磷块岩保存了可能是全球最早的后生动物化石 (瓮安动物群 ),对于瓮安动物群出现过程中的古海洋环境重建具有重要科学意义。但必须对成岩后生作用对磷块岩中的稀土元素改造进行评估。通过对贵州瓮安陡山沱组磷块岩的磷质碎屑、磷质和白云质胶结物、磷条带和泥条带等的稀土元素地球化学特征研究,确定沉积期后变化对稀土元素的改造影响不大。上矿层磷块岩沉积期形成的磷质碎屑、成岩期形成的白云质和磷质胶结物具相同的稀土元素配分模式,暗示了沉积期后的改造作用对瓮安陡山沱组磷块岩保存的原生沉积信息影响不大。瓮安陡山沱组磷块岩具有显著的重稀土亏损特征。磷块岩的磷质和白云质胶结物、伴生磷质碎屑、强风化磷块岩相近的ErN/LuN 比值,表明沉积期后的改造作用不是重稀土元素亏损的主要原因。磷块岩的ErN/LuN、LaN/NdN 与Ce/Ce 间的相关性,表明越氧化的沉积环境中,轻和重稀土元素亏损越强。

    English Abstract

    解启来, 陈多福, 漆亮, 陈先沛. 贵州瓮安陡山沱组磷块岩稀土元素地球化学特征与沉积期后变化[J]. 沉积学报, 2003, 21(4): 627-633.
    引用本文: 解启来, 陈多福, 漆亮, 陈先沛. 贵州瓮安陡山沱组磷块岩稀土元素地球化学特征与沉积期后变化[J]. 沉积学报, 2003, 21(4): 627-633.
    XIE Qi lai, CHEN Duo fu, QI Liang, CHEN Xian pei. REEs Geochemistry of Doushantuo Phosphorites and Modification during Post Sedimentary Stages in Weng'an Area, South China[J]. Acta Sedimentologica Sinica, 2003, 21(4): 627-633.
    Citation: XIE Qi lai, CHEN Duo fu, QI Liang, CHEN Xian pei. REEs Geochemistry of Doushantuo Phosphorites and Modification during Post Sedimentary Stages in Weng'an Area, South China[J]. Acta Sedimentologica Sinica, 2003, 21(4): 627-633.
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