Microgranite
A rock subtype
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About Microgranite
A granite with grain size of about 1-5 mm.
Unique Identifiers
Mindat ID:
48154
Long-form identifier:
mindat:1:1:48154:8
GUID
(UUID V4):
(UUID V4):
2de426ca-3493-4380-8837-48fb4b96e43d
Classification of Microgranite
Granite is in section 3 of the QAPF diagram.
Sub-divisions of Microgranite
- Microgranite
Mineralogy of Microgranite
Essential minerals - these are minerals that are required within the classification of this rock:
| Feldspar > Alkali Feldspar | A subgroup of the Feldspar Group, poor in calcium, and mostly rich in potassium. |
| Silica > Quartz | SiO2 |
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
| Amphibole > Hornblende | An informal name for dark green to black amphiboles, mostly ferro-hornblende or ... |
| Mica > Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| Mica > Muscovite | KAl2(AlSi3O10)(OH)2 |
References for Microgranite
Reference List:
Ailsa Craig, South Ayrshire, Scotland, UK