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A collective term for varieties of microsyenite and micromonzonite consisting of alkali feldspar with more or less oligoclase, biotite, pyroxene and often quartz. Characterised by rectangular oligoclase.
Classification of AkeriteHide
Sub-divisions of AkeriteHide
Mineralogy of AkeriteHide
Essential minerals - these are minerals that are required within the classification of this rock:
|Feldspar > Alkali Feldspar||Feldspar Group minerals rich in Potassium or Sodium.|
|Feldspar > Plagioclase > Oligoclase||(Na,Ca)[Al(Si,Al)Si2O8]|
|Mica > Biotite||K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2|
|Pyroxene||A petrological term for Pyroxene Group.|
Non-essential minerals - these minerals are common, sometimes major components, but are not always present: