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Quartz dolerite

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A variety of dolerite composed mainly of plagioclase and pyroxenes with interstitial quartz or micropegmatite. The rock has tholeiitic affinities and its pyroxenes are usually subcalcic augite accompanied by pigeonite or orthopyroxene.


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Classification of Quartz doleriteHide

Mineralogy of Quartz doleriteHide

Essential minerals - these are minerals that are required within the classification of this rock:
Feldspar > PlagioclaseA petrological term for Albite-Anorthite Series.
PyroxeneA petrological term for Pyroxene Group.
Silica > QuartzSiO2
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
Pyroxene > Clinopyroxene > Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Pyroxene > Clinopyroxene > Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Pyroxene > OrthopyroxeneA petrological term for Orthopyroxene Subgroup.

References for Quartz doleriteHide

Reference List:
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Le Maitre (ed.) (2002) Igneous Rocks - A Classification and Glossary of Terms. Cambridge Press

Internet Links for Quartz doleriteHide

Mineral and/or Locality  
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