Ilimaussaq intrusive complex

{{Short description|Alkalic layered intrusion located in Greenland}} [[File:Tugtupite 1.jpeg|thumb|Tugtupite on quartz from Ilimaussaq complex]] thumb|Kakortokite, a variety of agpaitic nepheline syenite, from the Ilimaussaq intrusive complex

The '''Ilimaussaq intrusive complex''' is a large alkalic layered intrusion located on the southwest coast of Greenland. It is Mesoproterozoic in age, about 1.16 Ga. It is the type locality of agpaitic nepheline syenite and hosts a variety of unusual rock types.<ref name=Sorensen>{{citation |last=Sørensen |first=H. |url=http://www.geus.dk/publications/bull-gl/nr190/nr190_p001-023.pdf |url-status=dead |archive-url=https://web.archive.org/web/20170810171529/http://www.geus.dk/publications/bull-gl/nr190/nr190_p001-023.pdf |archive-date=2017-08-10 |title=Brief introduction to the geology of the Ilímaussaq alkaline complex, South Greenland, and its exploration history |series=GEOLOGY OF GREENLAND SURVEY BULLETIN |volume=190 |year=2001}}</ref>

== Description == The complex is noted for a wide variety of rare minerals and is the type locality for thirty minerals, including: aenigmatite, arfvedsonite, sodalite, eudialyte and tugtupite.<ref>http://www.mindat.org/loc-4302.html Mindat locality.</ref>

The complex has an areal extent of 8 by 17 km, and an exposed thickness of 1700 m. The complex includes Kvanefjeld, a uranium deposit and a large reserve of rare-earth elements, zirconium, niobium and beryllium.<ref name=Sorensen/>

==References== {{Reflist}}

Category:Geology of Greenland Category:Layered intrusions Category:Mesoproterozoic magmatism