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Durbachite

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A melanocratic microsyenite consisting of large biotite flakes with hornblende and orthoclase megacrysts in a groundmass of oligoclase and a little quartz.


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Classification of DurbachiteHide

Mineralogy of DurbachiteHide

Essential minerals - these are minerals that are required within the classification of this rock:
Amphibole > HornblendeAn informal name for dark green to black amphiboles, mostly ferro-hornblende or ...
Feldspar > Alkali Feldspar > OrthoclaseK(AlSi3O8)
Feldspar > Plagioclase > Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Mica > BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Silica > QuartzSiO2

References for DurbachiteHide

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

Internet Links for DurbachiteHide

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