Quartz-rich-granitic-rock
A rock classification type
This page is currently not sponsored. Click here to sponsor this page.
A rare coarse-grained crystalline igneous rock in which quartz comprises between 60-90% of the felsic minerals, and has <90% mafic minerals. It usually includes some feldspars and micas and/or amphiboles, and grades into quartzolite with increasing quartz, or granitoids with increasing feldspar.
In many cases these rocks may be hydrothermally altered granitoids (i.e greisens) rather than true igneous rocks.
In many cases these rocks may be hydrothermally altered granitoids (i.e greisens) rather than true igneous rocks.
Unique Identifiers
Mindat ID:
48125
Long-form identifier:
mindat:1:1:48125:6
GUID
(UUID V4):
(UUID V4):
3a321321-3dee-4d1d-8ec4-7f9b6b99fd14
Classification of Quartz-rich-granitic-rock
Rocks in section 1b of the QAPF diagram.
Sub-divisions of Quartz-rich-granitic-rock
- Quartz-rich-granitic-rock
Mineralogy of Quartz-rich-granitic-rock
Essential minerals - these are minerals that are required within the classification of this rock:
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
| Feldspar > Alkali Feldspar | A subgroup of the Feldspar Group, poor in calcium, and mostly rich in potassium. |
| Feldspar > Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
Internet Links for Quartz-rich-granitic-rock
mindat.org URL:
https://www.mindat.org/min-48125.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
References for Quartz-rich-granitic-rock
Reference List:
