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Melagranite

A rock subtype
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A granite with an M' colour index of greater than 20, i.e. a relatively dark granite (Greek mela = black).


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Unique IdentifiersHide

Mindat ID:
48151
Long-form identifier:
mindat:1:1:48151:1

Similar NamesHide

MetagraniteA rock classification type

Classification of MelagraniteHide

QAPF_P_3.png

Granite is in section 3 of the QAPF diagram.

Mineralogy of MelagraniteHide

Essential minerals - these are minerals that are required within the classification of this rock:
Feldspar > Alkali FeldsparA subgroup of the Feldspar Group, poor in calcium, and mostly rich in potassium.
Silica > QuartzSiO2
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
Amphibole > HornblendeAnCa2(Z2+5-mZ3+m)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
Mica > BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2

Internet Links for MelagraniteHide

References for MelagraniteHide

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