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铈异常及海水中铈的热力学

汪云亮 曾德森

汪云亮, 曾德森. 铈异常及海水中铈的热力学[J]. 海洋学报, 1993, 15(4): 68-76.
引用本文: 汪云亮, 曾德森. 铈异常及海水中铈的热力学[J]. 海洋学报, 1993, 15(4): 68-76.

铈异常及海水中铈的热力学

  • 摘要: 海相碳酸盐岩的铈异常可作为古海洋水氧化还原条件的一种指示剂。安哥拉海盐和巴西海盆(南大西洋)底部洋水在白垩纪时是还原环境,大约在54~58MaBP时,南大西洋变为类似于现在海水的氧化还原环境。本文提出了一个新的比较完善的铈氧化还原热力学公式,解释了长期悬而未决的海水和河水中铈地球化学异常的问题,如大西洋表层海水为何具有铈正异常等。查明于54~58MaBP非洲板块和南美板块彻底分离,统一的南、北大西洋开始形成。论证了阿尔卑斯运动和喜马拉雅运动是同步的。
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  • 收稿日期:  1991-05-04
  • 修回日期:  1993-01-20

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