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QAPF Diagram for Plutonic Rocks

 
 

QAPF Diagram for Plutonic Rocks

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QAPF plutonic rock definitions according to the IUGS recommendations for igneous rock classification.

1 Quartz-Rich Granitoid
1a Quartzolite
2 Alkali-Feldspar Granite
3 Granite (3a: Syenogranite - 3b: Monzogranite)
4 Granodiorite
5 Tonalite
6 Alkali-Feldspar Syenite
6* Quartz-Bearing Alkali-Feldspar Syenite
6' Foid-Bearing Alkali-Feldspar Syenite
7 Syenite
7* Quartz-Bearing Syenite
7' Foid-Bearing Syenite
8 Monzonite
8* Quartz-Monzonite
8' Foid-Monzonite
9 Monzodiorite / Monzogabbro
9* Quartz-Monzodiorite / Quartz-Monzogabbro
9' Foid-Monzodiorite / Foid-Monzogabbro
10 Diorite / Gabbro / Anorthosite
10* Quartz-Diorite / Quartz-Gabbro
10' Foid-Bearing Diorite / Foid-Bearing Gabbro
11 Foid-Syenite (Foyaite)
12 Foid-Monzosyenite
13 Foid-Monzodiorite (Essexite)
14 Foid-Diorite
15 Foidolite

Field 3 is sometimes subdivided into fields 3a and 3b, which correspond to syenogranite and monzogranite. Usually both are treated as one field.


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Photo added: 5th Jun 2012