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Geochemistry

, Volume 1, Issue 2, pp 175–185 | Cite as

Geochemical mechanism of Nb-, Ta-mineralization during the late stage of granite crystallization

  • Wang Yurong 
  • Li Jiatian 
  • Lu Jialan 
  • Fan Wenling 
Article

Abstract

The mechanism of Nb-, Ta-mineralizatio is discussed in the light of the properties of Nb-, Ta-complexes in different phases. Experiments show that Nb and Ta are essentially enriched in the melts when Nb-, Ta-bearing albite granites are completely melted (800–850°C) and in equilibrium with a HF-bearing vapor phase. It is also demonstrated from the experiments that the hydrolysis of Nb-, Ta-fluorine complexes in aqueous solutions takes place with increasing temperature reaching a maximum value in the vicinity of critical temperature and becoming stable under super-critical conditions. Under this circumstance, Nb-, Ta-complexes can be transported in the vapor phase. Ta exhibits a great ability of transport in the vapor phase as compared with Nb, while Nb is more soluble than Ta under hydrothermal conditions.

Keywords

Vapor Phase Topaz Granitic Magma Rock Body Filling Degree 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Institute of Geochemistry, Chinese Academy of Sciences 1982

Authors and Affiliations

  • Wang Yurong 
    • 1
  • Li Jiatian 
    • 1
  • Lu Jialan 
    • 1
  • Fan Wenling 
    • 1
  1. 1.Institute of GeochemistryAcademia SinicaChina

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