Pegmatitic granite
A rock subtype
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About Pegmatitic granite
Unique Identifiers
Mindat ID:
50286
Long-form identifier:
mindat:1:1:50286:9
Classification of Pegmatitic granite
Granite is in section 3 of the QAPF diagram.
Mineralogy of Pegmatitic granite
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:
| Beryl | Be3Al2(Si6O18) |
| Mica | A petrological term for Mica Group. |
| Topaz | Al2(SiO4)(F,OH)2 |
| Tourmaline | AD3G6(T6O18)(BO3)3X3Z |
Synonyms of Pegmatitic granite
Common Associates
Associations Based on Photo Data:
| 5 photos of Pegmatitic granite associated with 'Schist' | |
| 2 photos of Pegmatitic granite associated with Quartz | SiO2 |
| 2 photos of Pegmatitic granite associated with Muscovite | KAl2(AlSi3O10)(OH)2 |
| 1 photo of Pegmatitic granite associated with Microcline | K(AlSi3O8) |
| 1 photo of Pegmatitic granite associated with Tourmaline | AD3G6(T6O18)(BO3)3X3Z |
| 1 photo of Pegmatitic granite associated with Albite | Na(AlSi3O8) |
| 1 photo of Pegmatitic granite associated with 'Manganese-bearing Fluorapatite' | (Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH) |
| 1 photo of Pegmatitic granite associated with Béhierite | Ta(BO4) |
| 1 photo of Pegmatitic granite associated with 'Dravite-Uvite Series' | |
| 1 photo of Pegmatitic granite associated with 'Almandine-Spessartine Series' |
Internet Links for Pegmatitic granite
mindat.org URL:
https://www.mindat.org/min-50286.html
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References for Pegmatitic granite
Reference List:
Le Maitre, R. W. - Ed. (2002) Igneous Rocks - A Classification and Glossary of Terms (2nd ed.) Cambridge University Press. doi:10.1017/cbo9780511535581
Fransolet, André-Mathieu (2007) Phosphate associations in the granitic pegmatites: the relevant signification of these accessory minerals. Granitic Pegmatites: The State of the Art - International Symposium. 06th - 12th May 2007, Porto, Portugal.
Thomas, Rainer, Davidson, Paul, Beurlen, Hartmut (2012) The competing models for the origin and internal evolution of granitic pegmatites in the light of melt and fluid inclusion research. Mineralogy and Petrology, 106 (1) 55-73 doi:10.1007/s00710-012-0212-z
Sánchez-Muñoz, Luis, Müller, Axel, Andrés, Sol López, Martin, Robert F., Modreski, Peter J., de Moura, Odulio J.M. (2017) The P–Fe diagram for K-feldspars: A preliminary approach in the discrimination of pegmatites. Lithos, 272. 116-127 doi:10.1016/j.lithos.2016.10.030
Manjaka, Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar