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Melaquartz-alkali-feldspar-syenite

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A quartz-alkali-feldspar-syenite with an M' colour index of greater than 25.


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Classification of Melaquartz-alkali-feldspar-syeniteHide

Quartz-alkali-feldspar-syenite is in section 6* of the QAPF diagram.

Mineralogy of Melaquartz-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.
Silica > QuartzSiO2
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.

References for Melaquartz-alkali-feldspar-syeniteHide

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Le Maitre (ed.) (2002) Igneous Rocks - A Classification and Glossary of Terms. Cambridge Press

Internet Links for Melaquartz-alkali-feldspar-syeniteHide

Mineral and/or Locality  
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