Granitoid

A granitoid is a broad term referring to a diverse group of coarse-grained igneous rocks that are widely distributed across the globe, covering a significant portion of the Earth's exposed surface and constituting a large part of the continental crust.^[1] These rocks are primarily composed of quartz, plagioclase, and alkali feldspar.^[2] Granitoids range from plagioclase-rich tonalites to alkali-rich syenites and from quartz-poor monzonites to quartz-rich quartzolites.^[3] As only two of the three defining mineral groups (quartz, plagioclase, and alkali feldspar) need to be present for the rock to be called a granitoid, foid-bearing rocks, which predominantly contain feldspars but no quartz, are also granitoids.^[3]

^ Tomás, R.; Cano, M.; Pulgarín, L. F.; Brotóns, V.; Benavente, D.; Miranda, T.; Vasconcelos, G. (2021-11-01). "Thermal effect of high temperatures on the physical and mechanical properties of a granite used in UNESCO World Heritage sites in north Portugal". Journal of Building Engineering. 43: 102823. doi:10.1016/j.jobe.2021.102823. hdl:10045/115630. ISSN 2352-7102.
^ "USGS: Mineral Resources On-Line Spatial Data: Granitoid".
^ ^a ^b Streckeisen, A. (1974). "Classification and Nomenclature of Plutonic Rocks: Recommendations of the IUGS Subcommission on the Systematics of Igneous Rocks". Geologische Rundschau (in German). 63 (2): 773–86. Bibcode:1974GeoRu..63..773S. doi:10.1007/BF01820841. S2CID 130569261.

[1] Tomás, R.; Cano, M.; Pulgarín, L. F.; Brotóns, V.; Benavente, D.; Miranda, T.; Vasconcelos, G. (2021-11-01). "Thermal effect of high temperatures on the physical and mechanical properties of a granite used in UNESCO World Heritage sites in north Portugal". Journal of Building Engineering. 43: 102823. doi:10.1016/j.jobe.2021.102823. hdl:10045/115630. ISSN 2352-7102.

[2] "USGS: Mineral Resources On-Line Spatial Data: Granitoid".

[Streckeisen-1974-3] Streckeisen, A. (1974). "Classification and Nomenclature of Plutonic Rocks: Recommendations of the IUGS Subcommission on the Systematics of Igneous Rocks". Geologische Rundschau (in German). 63 (2): 773–86. Bibcode:1974GeoRu..63..773S. doi:10.1007/BF01820841. S2CID 130569261.

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