Syenite from CorsicaQAPF diagram that shows the quartz (Q), alkali feldspar (A), and plagioclase (P) composition of syeniteLeucocratic variety of nepheline syenite from Sweden (särnaite)
Syenite is a coarse-grained intrusive igneous rock with a general composition similar to that of granite, but deficient in quartz, which, if present at all, occurs in relatively small concentrations (< 5%). It is considered a granitoid. Some syenites contain larger proportions of mafic components and smaller amounts of felsic material than most granites; those are classed as being of intermediate composition.
The extrusive equivalent of syenite is trachyte.[1]
^Carracedo, J. C. (2016). The geology of the Canary Islands. V. R. Troll. Amsterdam, Netherlands. ISBN 978-0-12-809664-2. OCLC 951031503.{{cite book}}: CS1 maint: location missing publisher (link)
Syenite is a coarse-grained intrusive igneous rock with a general composition similar to that of granite, but deficient in quartz, which, if present at...
Nepheline syenite is a holocrystalline plutonic rock that consists largely of nepheline and alkali feldspar. The rocks are mostly pale colored, grey or...
Outer Coarse Syenite, the Nepheline Sodalite Syenite, the Fire Tower Syenite, the Garland Peak Syenite, the Watson Ledge Quartz Syenite, and the Interior...
alkali feldspar – a plutonic rock with <5% normative quartz Nepheline syenite – Holocrystalline plutonic rock – A silica-undersaturated plutonic rock...
coarse-grained, foliated variety of nepheline syenite, sometimes called nepheline syenite gneiss or gneissic nepeheline syenite. Litchfieldite is composed of two...
exposures of the Beemerville Alkaline Complex consist of two large nepheline syenite plutons; a nearby diatreme (Rutan Hill); and several other nearby and much...
varieties of syenite, diorite, gabbro, etc., in which feldspathoid minerals occur, and indeed there are many transitions between syenites of ordinary type...
enriched with silica and alkali metals. It is the volcanic equivalent of syenite. Trachyte is common wherever alkali magma is erupted, including in late...
minerals. For example, a syenite with significant nepheline present can be termed a nepheline-bearing syenite or nepheline syenite, with the term nepheline...
Kishangarh, 14% of the population is under 6 years of age. Kishangarh Nepheline Syenite is among the 32 National Geological Monuments in India notified by Geological...
minerals are calcium carbonate (limestone), building stone, nepheline syenite, olivine, iron, titanium, and nickel. In 2017, the Government Pension Fund...
article incorporates public domain material from Feldspar and nepheline syenite (PDF). United States Geological Survey. Warr, L.N. (2021). "IMA–CNMNC approved...
historical petrological name for a pyroxene-melanite bearing nepheline syenite variety which contains nepheline-alkali feldspar pseudomorphs interpreted...
Siberian System Geology Orogeny Alpine orogeny Age of rock Proterozoic, Lower Paleozoic Type of rock Gabbro, diorite, granite and syenite intrusive rocks...
Illimaussaq alkaline complex consists of pegmatites such as nepheline, syenites (especially kakortokite or naujaite) and sodalite (sodalite-foya). In Ivittuut...
metamorphic terranes. It also occurs in low-silica igneous syenite and nepheline syenite intrusives. Other occurrences are as masses adjacent to ultramafic...
lateritization of various silicate rocks such as granite, gneiss, basalt, syenite, and shale. In comparison with the iron-rich laterites, the formation of...
name. Andradite is found in skarns and in deep-seated igneous rocks like syenite as well as serpentines and greenschists. Demantoid is one of the most prized...
limestone, ceramic clay, potassium, albite, salt mine, mirabilite, nepheline, syenite, fluorite, marble, mineral water, and geothermal mineral water. Since Guangzhou...
Great West Notch and the Kibo Barranco. The former exposes intrusions of syenite. Kibo has five main lava formations: Phonotephrites and tephriphonolites...
of alkali feldspar. Granitic rocks poorer in quartz are classified as syenites or monzonites, while granitic rocks dominated by plagioclase are classified...
feldspathoid-bearing monzonite. Rock richer in alkali feldspar is classified as syenite, while rock richer in plagioclase is termed a monzodiorite. The volcanic...
banks of the Maritsa River. The city has historically developed on seven syenite hills, some of which are 250 metres (820 feet) high. Because of these hills...
forming (1) gabbro, diorite, tonalite and granite or (2) gabbro, diorite, syenite and granite. If magma resides in a chamber for a long period, then it can...
ore bodies. The waste rock at the footwall of the ore is syenite porphyry. At places this syenite porphyry has nodules variously filled with actinolite,...
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