, Volume 3, Issue 2, pp 154–160 | Cite as

Hydrothermal uranium deposits and sulfur isotopes

  • Genqing Cai


Research on sulfur isotopes in hydrothermal uranium deposits with acid alterations shed much light on the genetic aspects of hydrothermal uranium deposits. Based on the studies of uranium deposits of different genesis, it is concluded that σ34S of Sulfides in hydrothermal uranium deposits derived from residual magma is within the range of +2‰ −2.6‰, approximately the same as meteorite sulfur. δ34S of Sulfides in polygenetic hydrothermal uranium deposits is slightly lighter than meteorite sulfur and varies over a restricted range (6.7‰), averaging −10.15‰. Two intervals can be recognized with respect to sulfur isotopic compositions in palingenetic hydrothermal uranium deposits. δ34S of sulfides formed in diagenesis, autometamorphism and hypothermal stages is similar to meteorite sulfur. On the other hand, at the stage starting from the alteration of uranium mineralization to the formation o uranium deposits and postmineralization the average δ34S is -7.89‰, with a wider range of δ34S variation (13.7‰), which can be attributed to the enrichment of δ34S in palingenetic hydrothermal solutions.


Uranium Pyrite Uranium Mineralization Alteration Zone Uranium Deposit 
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    Grineco, V. A. and Grineko, L. A., Geochemistry of Sulfur.Isotopes, Science Press, Moscow (1974).Google Scholar
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    Vinogradov, V. I., Sulfur Isotopes and Problems of Ore-formation, Science Press, Moscow (1967).Google Scholar
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    Tsuhrov, F. V., Geology of Ore Deposits, No. XVI, (1974).Google Scholar

Copyright information

© Institute of Geochemistry, Chinese Academy of Sciences 1984

Authors and Affiliations

  • Genqing Cai
    • 1
  1. 1.Beijing Research Institute of Uranium GeologyChina

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