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Dioritoid

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About DioritoidHide

A field term for coarse-grained crystalline normal igneous rocks with <90% mafic minerals and the felsic minerals containing <20% quartz, <10% felspathoids and plagioclase being >65% of total feldspars. The plagioclase is sodium rich, in contrast to gabbroids, which have calcium rich plagioclase. The group includes diorite, quartz diorite, quartz monzodiorite, foid- bearing diorite, foid- bearing monzodiorite and monzodiorite.


Classification of DioritoidHide


float='left'>Dioritic rocks are in sections 9,9*,9’,10,10* and 10' of the QAPF diagram.

Sub-divisions of DioritoidHide

Mineralogy of DioritoidHide

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:
Amphibole > HornblendeAn informal name for dark green to black amphiboles, mostly ferro-hornblende or ...
Mica > BiotiteA series or subgroup of the Mica Group.

Synonyms of DioritoidHide

Internet Links for DioritoidHide

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