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Alkali diorite

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A variety of diorite with alkaline character due to the presence of such dark constituents as barkevikite or kaersutite.


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Classification of Alkali dioriteHide

Diorite is in section 10 of the QAPF diagram.

Mineralogy of Alkali dioriteHide

Essential minerals - these are minerals that are required within the classification of this rock:
Feldspar > PlagioclaseA petrological term for Albite-Anorthite Series.
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
BarkevikiteAn obsolete name for a dark amphibole from pegmatites in the Langesundsfjord area = Larvik Plutonic Complex.
Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Mica > BiotiteA series or subgroup of the Mica Group.
Silica > QuartzSiO2

Internet Links for Alkali dioriteHide

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