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Alkali-feldspar-syenite

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A syenitic-rock where plagioclase is less than 10% of the total feldspar.


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Classification of Alkali-feldspar-syeniteHide

Alkali-felddspar-syenite is in section 6 of the QAPF diagram.

Sub-divisions of Alkali-feldspar-syeniteHide

Mineralogy of Alkali-feldspar-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.
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
Amphibole > HornblendeAn informal name for dark green to black amphiboles, mostly ferro-hornblende or ...
Mica > BiotiteA series or subgroup of the Mica Group.

Internet Links for Alkali-feldspar-syeniteHide

Mineral and/or Locality  
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