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Peralkaline alkali-feldspar-granite

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A term that may be used for a variety of alkali feldspar granite that contains alkali pyroxene and/or amphibole. This term should be used in preference to alkali granite.


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Classification of Peralkaline alkali-feldspar-graniteHide

Rocks in section 2 of the QAPF diagram.

Sub-divisions of Peralkaline alkali-feldspar-graniteHide

Mineralogy of Peralkaline alkali-feldspar-graniteHide

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:
Alkali pyroxeneA petrological name for the sodium-rich pyroxenes aegirine and aegirine-augite.
Sodic amphiboleA petrological term for amphibole rich in sodium.

Synonyms of Peralkaline alkali-feldspar-graniteHide

Internet Links for Peralkaline alkali-feldspar-graniteHide

 
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