{{Short description|Intrusive igneous rock}} {{Infobox rock |name=Syenogranite |type= Igneous |coordinates= |image= |alt= |caption= }}
'''Syenogranite''' is a fine to coarse grained [[Intrusive rock|intrusive]] rock of the same general composition as [[granite]]. For example, the syenogranite in the [[Salmon-Challis National Forest|Salmon Mountains]] in Idaho is pink to tan and composed of 45–55% alkali feldspar, 15–20% [[plagioclase]], 15–20% [[quartz]], 5–8% [[biotite]], 3–5% [[hornblende]], and accessory [[magnetite]] (Evans and Green, 2003).
Syenogranite is similar to [[syenite]]. Some syenogranite contain hornblende, while also contain biotite, plagioclase (An<sub>3</sub>), and quartz. (Mafti, 2001). It is in the Sao Jose do Campestre [[Massif]] in [[Brazil]] (Benjamin et al., 1998).
==See also== * [[syenite]] * [[monzogranite]] * [[granite]]
==References== * Bley, Benjamin, Peter Christian Hackspacher, Elton Luizdantas, and William Randall Van Schmus. (1998) "Archean Accretion in the Sao Jose do Campestre Massif, Borborema Province, Northeast Brazil." Revista Brasileirade Geociencias, Vol. 28 [http://www.sbgeo.org.br/rgb/vol28_down/2802/2802221.pdf] * Karl V. Evans and Gregory N. Green (2003) “Geological Map of the Salmon National Forest and Vicinity, East-Central Idaho.” U.S. Department of the Interior, U. S. Geological Survey.[https://pubs.usgs.gov/imap/i-2765/i-2765_508.pdf] {{PD-notice}} * Mafti, Mohammed Rashad H. (2001) "Age, Geochemistry and Origin of the Peraluminous A-Type Granitoids of the Ablah-Shuwas Pluton, Ablah Graben Arabian Shield." Faculty of Earth Sciences, King Abdulaziz University, Acta Mineralogica-Petrographica, Vol. 42, pp. 5–20.[http://acta.bibl.u-szeged.hu/25085/1/mineralogica_042_005-020.pdf]
[[Category:Plutonic rocks]]
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