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
GUID
(UUID V4):
(UUID V4):
5f25c2b6-0e96-4ad6-9c6a-34639371cae0
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 12 recorded ages.
Synonyms of Peralkaline alkali-feldspar-granite
Common Associates
Associated Minerals Based on Photo Data:
Internet Links for Peralkaline alkali-feldspar-granite
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References for Peralkaline alkali-feldspar-granite
Reference List:
Ahumada Municipality, Chihuahua, Mexico