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Mo isotopes in the Lower Cambrian formation of southern China and its implications on paleo-ocean environment

  • Brief Communication/Geochemistry
  • Published:
Chinese Science Bulletin

Abstract

Over the past decade, as one of nontraditional stable isotopes, Mo isotope has developed rapidly and now become an important geochemical proxy to trace paleo-oceanic and atmospheric evolution through geological history. In this paper, Early Cambrian formations in southern China are investigated. The results indicate that δ97/95Mo values of Early Cambrian seawater may have been larger than 1.4%, values that are close to those of the modern ocean. It was also found that the variations in Mo isotope composition in samples from two sections (Huangjiawan and Gezhongwu in Guizhou) were closely related to changes in redox conditions during sedimentary processes. Combining our results with existing data, a preliminary model for the evolution of seawater Mo isotope composition through geological history was provided. It indicated that Mo isotopic variations were generally consistent with the evolution of atmospheric oxygen.

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Authors and Affiliations

  1. State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, China

    HanJie Wen, YuXu Zhang, HaiFeng Fan & RuiZhong Hu

  2. Graduate University of Chinese Academy of Sciences, Beijing, 100049, China

    YuXu Zhang

Authors
  1. HanJie Wen
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  2. YuXu Zhang
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  3. HaiFeng Fan
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  4. RuiZhong Hu
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Corresponding author

Correspondence to HanJie Wen.

Additional information

Supported by the National Basic Research Program of China (Grant No. 2007 CB411402), National Natural Science Foundation of China (Grant Nos. 40773034 and 40873014), “West Light” of the Chinese Academy of Sciences, and Opening Foundation of State Key Laboratory of Continental Dynamics (Northwest University)

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Wen, H., Zhang, Y., Fan, H. et al. Mo isotopes in the Lower Cambrian formation of southern China and its implications on paleo-ocean environment. Chin. Sci. Bull. 54, 4756–4762 (2009). https://doi.org/10.1007/s11434-009-0446-2

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  • DOI: https://doi.org/10.1007/s11434-009-0446-2

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