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Quartz-syenite

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A syenite with 5-20% quartz on the QAPF diagram, and no foids


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Classification of Quartz-syeniteHide

Quartz-syenite is in section 7* of the QAPF diagram.

Sub-divisions of Quartz-syeniteHide

Mineralogy of Quartz-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.

Internet Links for Quartz-syeniteHide

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