Syenogranite
| Igneous rock |
Syenogranite is a fine to coarse grained intrusive rock of the same general composition as granite. For example, the syenogranite in the 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 (An3), and quartz. (Mafti, 2001). It is in the Sao Jose do Campestre Massif in Brazil (Benjamin et al., 1998).
See also
[edit]References
[edit]- 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 [1]
- 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.[2]
This article incorporates text from this source, which is in the public domain. - 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.[3]
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