Chinese Journal of Geochemistry

, Volume 17, Issue 1, pp 1–11 | Cite as

The three end members of Li-F granites and their origin of liquid segregation

  • Wang liankui
  • Wang huifen
  • Huang Zhilong


Li-F granites all over the world can be represented by three end members, i. e., the Na-rich ongonite (O), the K-rich xianghualingite (X) and the Si-rich topazite (T). Characters and criteria are presented for these end-member rocks. Vertical zoning in Li-F granites, as reflected by increasing normative Q and C (corundum) and decreasing ALK (K2O+ Na2O) with increasing content of fluorine, can be explained using the three-end-member scheme in terms of petrochemistry and norms. Considering the difference in melt structure, viscosity and density between the end members, in couple with the regularities that govern the Na-K and SiALK segregation known from field evidence and experiments, it is suggested that the three end members may have resulted from liquid segregation (immiscibility) rather than from crystal fractionation as commonly believed.


Li-F granite magma differentiation liquid segregation (immiscibility) K-Na segregation granite geochemistry 


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Copyright information

© Institute of Geochemistry, Chinese Academy of Sciences 1998

Authors and Affiliations

  • Wang liankui
    • 1
  • Wang huifen
    • 1
  • Huang Zhilong
    • 2
  1. 1.Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou
  2. 2.Institute of GeochemistryChinese Academy of SciencesGuiyang

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