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Alkaline Igneous Complexes

Inspired by a visit to Ilimaussaq and Igaliku in June 2023
The Ilimaussaq complex from Tunulliarfik. The dark basaltic roof to the intrusion can be seen in the central peak. The view along Tunulliarfik, the eastern margin of the Ilimaussaq Complex visible about half way up Nunasarnaq. View of the Ilimaussaq complex (centre) including contact with Eriksfjord Formation lavas and sandstones (at right) Western margin of the Ilimaussaq Complex truncating Eriksfjord Formation basalts and sandstones (right hand side).
The Kvanefjeld 1980 adit entrance View down the valley towards Dyrnaes from Kvanefjeld on a cloudy and drizzly day Notice that band of eudialyte Some large K feldspar
Steenstrupine-Ce with aegirine terminated crystals in sodalite, Ilimaussaq Crystal model for Ilimaussaq steenstrupine-Ce Trigonal steenstrupine-Ce crystal from the Taseq slope Trigonal steenstrupine-Ce crystal from the Taseq slope
Narsarsukite crystals to 4 mm, Iglutalik, in front of Narsaq Crystal model for narsarsukite Narsarsukite models in Atlas der Krystallformen, V6, Victor Goldschmidt (1913) Narsarsukite crystal, 14 mm across, Mont-Saint-Hilaire, Quebec, Canada
Crystal model for the Mont-Saint-Hilaire narsarsukite A hint of tugtupite! Tugtupite with sphalerite, Kvanefjeld, collected 4th June 2023 Eudialyte with 15 mm complete crystal in the centre
Crystal model for eudialyte 3D printed model of the 15 mm eudialyte crystal Eudialyte crystal, Putelichorr Mountain, Khibing Massif, Kola Peninsula, Russia. Very well formed trigonal crystal 37 mm Crystal model for Kola Peninsula eudialyte
Sørensenite spray of monoclinic acicular crystals in analcime Sørensenite spray of monoclinic acicular crystals in analcime, under short wave UV light. Bertil Photo Naujakasite, very large crystals for the species. Naujakasik (Naajakasik), Tunulliarfik Fjord, Ilímaussaq complex, Kujalleq Epididymite (colourless) with elpidite (brown) crystals on albite, Narssarssuk, Igaliko, Greenland, Type Locality for both
Two epididymite twins (each 1 cm diameter) with aegirine, Mont Saint Hilaire Model of epididymite twin Neptunite crystals (to 5mm) with aegirine, Narssârssuk Pegmatite, Narsaarsuk Plateau, Igaliku (Type Locality) Neptunite crystal model
Neptunite crystal model Neptunite models in Atlas der Krystallformen, V6, Victor Goldschmidt (1913) Serandite crystal, 2 cm, Mont Saint Hilaire Serandite model.png
Catapleiite from Mont Saint Hilaire, 12 mm crystal Model of catapleiite from Mont Saint Hilaire Catapleiite from Mont Saint Hilaire, 16 mm crystal catapleiite crystals with arginine and nafertisite from the Nanna pegmatite, Igaliko
Model of catapleiite crystal from the Nanna pegmatite, Igaliko Nafertisite, catapleiite, analcime, aegirine from the Nanna pegmatite, Igaliko Murmanite crystals, Tunulliarfik, Ilimaussaq ivigtut siderite crystal 27 mm in cryolite with galena and pyrite, Gregory Bottley & Lloyd specimen
Siderite with galena, chalcopyrite and cryolite, Ivigtut, from Mineralogical Museum of the University of Copenhagen (1951) Ivigtut siderite model Detail of chalcopyrite, galena, siderite and cryolite from the Ivigtut deposit Large (to 25 mm), sharp partially replaced Parisite-Ce crystals, Mounta Malosa, Malawi
Doubly terminated aegirine crystal on microcline, Mount Malosa, Malawi Pyrochlore octahedra, aegirine and smokey quartz on microcline, Mount Malosa, Malawi Native iron from Blaafjeld, Uivfaq, Disko Island, Qeqertalik, 20 x 17 mm Quartz crystals in cryolite with siderite and chalcopyrite, Ivigtut

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