Peralkaline alkali-feldspar-granite
A rock subtype
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About Peralkaline alkali-feldspar-granite
A term that may be used for a variety of alkali feldspar granite that contains alkali pyroxene and/or amphibole. This term should be used in preference to alkali granite.
Unique Identifiers
Mindat ID:
50284
Long-form identifier:
mindat:1:1:50284:1
Classification of Peralkaline alkali-feldspar-granite
- Rock
- Igneous rock
- Normal crystalline igneous rock
- Coarse-grained ("plutonic") crystalline igneous rock
- Granitoid
- Alkali-feldspar-granite
- Peralkaline alkali-feldspar-granite
- Alkali-feldspar-granite
- Granitoid
- Coarse-grained ("plutonic") crystalline igneous rock
- Normal crystalline igneous rock
- Igneous rock

Rocks in section 2 of the QAPF diagram.
Sub-divisions of Peralkaline alkali-feldspar-granite
- Peralkaline alkali-feldspar-granite
Mineralogy of Peralkaline alkali-feldspar-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:
| Alkali pyroxene | A petrological name for the sodium-rich pyroxenes aegirine and aegirine-augite. |
| Sodic amphibole | A petrological term for amphibole rich in sodium. |
Age distribution
Recorded ages:
Neoproterozoic to Neogene : 740 ± 30 Ma to 20.7 ± 1.4 Ma - based on 13 recorded ages.
Synonyms of Peralkaline alkali-feldspar-granite
Common Associates
Associated Minerals Based on Photo Data:
Internet Links for Peralkaline alkali-feldspar-granite
mindat.org URL:
https://www.mindat.org/min-50284.html
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References for Peralkaline alkali-feldspar-granite
Localities for Peralkaline alkali-feldspar-granite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.



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The
Ahumada Municipality, Chihuahua, Mexico