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Peralkaline-alkali-feldspar nepheline-syenite

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About Peralkaline-alkali-feldspar nepheline-syeniteHide

A alkali-feldspar nepheline-syenite characterised by complex Zr and Ti minerals such as eudialyte rather than simple minerals sch as zircon or ilmenite.


Classification of Peralkaline-alkali-feldspar nepheline-syeniteHide

QAPF_P_11.png

Foid-syenite is in section 11 of the QAPF diagram.

Sub-divisions of Peralkaline-alkali-feldspar nepheline-syeniteHide

  • Peralkaline-alkali-feldspar nepheline-syenite

Mineralogy of Peralkaline-alkali-feldspar nepheline-syeniteHide

Essential minerals - these are minerals that are required within the classification of this rock:
Feldspar > Alkali FeldsparFeldspar Group minerals rich in Potassium or Sodium.
Feldspathoid > NephelineNa3K(Al4Si4O16)
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
EudialyteNa15Ca6(Fe2+,Mn2+)3Zr3[Si25O73](O,OH,H2O)3(OH,Cl)2

Synonyms of Peralkaline-alkali-feldspar nepheline-syeniteHide

Internet Links for Peralkaline-alkali-feldspar nepheline-syeniteHide

 
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