Quartz diorite

Quartz diorite

Quartz diorite is an igneous, plutonic (intrusive) rock, of felsic composition, with phaneritic texture. Feldspar is present as plagioclase (typically oligoclase or andesine) with 10% or less potassium feldspar. Quartz is present at between 5 to 20% of the rock. Biotite, amphiboles and pyroxenes are common dark accessory minerals.

References

* Williams, Howel; Francis J. Turner and Charles M. Gilbert (1954) "Petrography", W. H. Freeman
* [http://www.em.gov.bc.ca/mining/Geolsurv/Publications/InfoCirc/IC1987-05/rocks/qzdior.htm Definition with images]


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  • quartz-di|o|rite — «KWAWRTS DY uh ryt», noun. a variety of diorite having quartz as one of its main components …   Useful english dictionary

  • Diorite — Hache polie en diorite néolithique – Environs de Reims (Marnes) France – Collection d’Alexis Damour – Muséum de Toulouse PRE.2009.0.215.1 (250x52x33mm) La diorite est une roche magmatique plutonique grenue composée de plagioclase, d amphibole …   Wikipédia en Français

  • diorite — n. a coarse grained plutonic igneous rock containing quartz. Derivatives: dioritic adj. Etymology: F f. Gk diorizo distinguish …   Useful english dictionary

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