Fundamental Minerals

Sialic Minerals

• Feldspars
Feldspars minerals
Alkali Feldspars
Plagioclase

• Feldspathoids
Feldspathoids
Cancrinite
Haüyne
Leucite
Nepheline
Sodalite

• Quartz

Femic Minerals

• Amphiboles
• Biotite
• Sagenitic biotite
• Kaersutite
• Olivine
• Pyroxenes
Structure/classification
Clinopyroxene

• Spodumene

Accessory Minerals

• Apatite
• Chromite
• Ilmenite
• Magnetite
• Zircon

Rare Accessory

• Allanite
• Andalusite
• Astrophyllite
• Beryl
• Calcite
• Cancrinite
• Catapleiite
• Cordierite
• Diaspore
• Eudialyte
• Fluorite
• Garnets
• Lazulite
• Lamprophyllite
• Lorenzenite
• Monticellite
• Muscovite
• Natrolite
• Naujakasite
• Niocalite
• Perovskite
• Polylithionite
• Rosenbuschite
• Rutile
• Scapolite
• Sørensenite
• Titanite
• Topaz
• Tourmaline
• Tugtupite
• Ussingite
• Wollastonite
• Xenotime
• Zinnwaldite

Alteration Products

• Chlorite
• Saussurite
• Sericite
• Uralite
• Wairakite

Microstructures

• Antiperthite
• Exsolution lamellae
• Graphic texture
• Granophyric texture
• Magmatic flow
• Myrmekite
• Pleochroic halo
• Poikilitic texture
• Perthite
• Pseudoleucite
• Zoning

Rocks

• Alkali feldspar granite
• Alkali feldspar syenite
• Alnö complex
Alnö complex
Alnöite
Sövite

• Anorthosite
• Brandberg granites
• Borolanite
• Carbonatites
Carbonatites
Alnö (Sweden)
Fogo (C. Verde)
Sao Vicente (C. Verde)
Oka (Canada)
Sokli (Finland)
Valentine (Canada)

• Cumberlandite
• Cumulate rocks
Cumulate
Adcumulate
Orthocumulate

• Diorite
• Dunite (Dun)
• Ekerite
• Eurite
• Finero harzburgite
• Foidolite (leucite)
• Foidolite (nepheline)
• Foidolite (haüyne)
• Foyaite
• Gabbro
• Gabbro "eufodite"
• Gabbro with augite
• Gabbronorite
• Granite
• Granophyre
• Greisen
• Hornblendite
• Hornblendite (cpx-hbl)
• Hornblende gabbro
• Hornblende gabbro (Adamello)
• Ijolite
• Ijolite (Magnet Cove)
• Ilimaussaq magmatic complex
Ilimaussaq
Black kakortokite
Red kakortokite
White kakortokite
Lujavrite
Naujakasite lujavrite
Naujaite
Tugtupite syenite

• Jacupiranga complex
Jacupiranga
Sövite

• Jacupirangite (Alnö)
• Jotunite
• Italite
• Kakortokite
• Kaxtorpite
• Kentallenite
• Lakarpite
• Larvik
Larvik complex
Ekerite
Larvikite

• Lherzolite (TL)
• Leucogranite
• Lujavrite
• Lugarite
• Luxullianite
• Melilitolite
• Melilitolite (wollastonite)
• Melteigite
• Monzonite
• Monzodiorite
• Naujaite
• Nepheline syenite
• Norra Kärr complex
Norra Kärr
Kaxtorpite
Lakarpite
Pulaskite

• Norite
• Olivine hornblendite
• Oka complex
Oka complex
Niocalite carbonatite
Monticellite carbonatite

• Olivine gabbro
• Orthopyroxenite
• Pegmatite
• Pegmatite (cancrinite)
• Pegmatite (nepheline)
• Peralkaline granite
• Peridotites
Peridotites
Dunite
Wherlite
Harzburgite
Garnet lherzolite
Spinel lherzolite

• Pyroxenite
• Pulaskite
• Quartz-gabbro
• Rhum layerded complex
• Serpentinized lherzolite
• Syenite
• Synnyrite
• Syenogranite
• Sodalite syenite
• Tonalite
• Troctolite
• Urtite

Lakarpite

Lakarpite: A local name for a coarse-grained variety of nepheline syenite consisting of alkali feldspar, altered nepheline, abundant arfvedsonite, aegirine and a little pectolite. Törnebohm, 1906

Törnebohm described a rock type from the northern parts of the Norra Kärr alkaline complex, in which he identified rosenbuschite, and named it lakarpite after the nearby farm Lakarp. This rock is a mesocratic nepheline syenite that is mainly composed of albite, arfvedsonite, and nepheline with microcline, rosenbuschite, mosandrite, apatite, titanite, and abundant fluorite.

For more information about the Norra Kärr complex, see page: "Norra Kärr"



Sample kindly given to me by Stefan Mager.

Lakarpite with nepheline (grey) and arfvedsonite (dark). From: Hildegard Wilske

Lakarpite with nepheline (grey) and arfvedsonite (dark). From: Hildegard Wilske

Bibliography

• Sjöqvist, A.S.L., Cornell, D.H., Andersen, T., Erambert, M., Ek, M., and Leijd, M. (2013). Three compositional varieties of rare-earth element ore: Eudialyte-group minerals from the Norra Kärr alkaline complex, southern Sweden. Minerals, 3(1), pp.94–120.
• Thesis (2015). Axel S.L. Sjöqvist: Agpaitic rocks of the Norra Kärr alkaline complex: Chemistry, origin, and age of eudialyte-hosted zirconium and rare-earth element ore.
• Saxon, M., Leijd, M., Forrester, K., and Berg, J., (2015): Geology, mineralogy, and metallurgical processing of the Norra Kärr heavy REE deposit, Sweden. In: Simandl, G.J. and Neetz, M., (Eds.), Symposium on Strategic and Critical Materials Proceedings, November 13-14, 2015, Victoria, British Columbia. British Columbia Ministry of Energy and Mines, British Columbia Geological Survey Paper 2015-3, pp. 97-107.
• Tasman metals Ltd. Project (http://www.tasmanmetals.com/s/Norra-Karr.asp)

Photo

Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 1x (Field of view = 9mm)	Arfvedsonite, feldspar and nepheline (gray), fluorite (isotropic). Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 1x (Field of view = 9mm)	Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). In the right corner there is a fibrous rosenbuschite crystal (beige color). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 1x (Field of view = 9mm)
Arfvedsonite, feldspar and nepheline (gray), fluorite (isotropic). In the right corner there is a fibrous rosenbuschite crystal (yellow). Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 1x (Field of view = 9mm)	Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 1x (Field of view = 9mm)	Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 1x (Field of view = 9mm)
Arfvedsonite (green), fluorite (violet) and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)	Arfvedsonite (green), eudyalite (high relief, white-pale-pink) and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)	Arfvedsonite, eudyalite (very low interference colors) and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 2x (Field of view = 7mm)
Arfvedsonite (green), eudyalite (high relief, white-pale-pink) and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)	Arfvedsonite, eudyalite (very low interference colors) and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 2x (Field of view = 7mm)	Arfvedsonite (green), eudyalite (high relief, white-pale-pink) and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)
Arfvedsonite, eudyalite (very low interference colors) and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 2x (Field of view = 7mm)	Rosenbuschite (small beige crystals), eudyalite (high relief, white-pale-pink) and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)	Rosenbuschite, eudyalite (very low interference colors) and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 2x (Field of view = 7mm)
Eudyalite (high relief, white-pale-pink) and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)	Eudyalite (very low interference colors) and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 2x (Field of view = 7mm)	Arfvedsonite, rosenbuschite (small beige crystals), eudyalite (high relief, white-pale-pink) and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)
Arfvedsonite and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)	Arfvedsonite and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 2x (Field of view = 7mm)	Arfvedsonite, rosenbuschite (small beige crystals), eudyalite (high relief, white-pale-pink) and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)
Arfvedsonite, eudyalite (high relief, white-pale-pink) and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)	Arfvedsonite, eudyalite (very low interference colors) and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 2x (Field of view = 7mm)	Arfvedsonite and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)
Arfvedsonite and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 2x (Field of view = 7mm)	Rosenbuschite (small beige crystals), eudyalite (high relief, white-pale-pink) and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)	Eudyalite (very low interference colors), Rosenbuschite and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 2x (Field of view = 7mm)
Rosenbuschite (small beige crystals), eudyalite (high relief, white-pale-pink) and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)	Rosenbuschite, eudyalite (very low interference colors) and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 10x (Field of view = 2mm)	Rosenbuschite (small beige crystals), eudyalite (high relief, white-pale-pink) and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
Rosenbuschite, eudyalite (very low interference colors) and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 10x (Field of view = 2mm)	Eudyalite (high relief, white-pale-pink) and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)	Eudyalite (very low interference colors) and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 10x (Field of view = 2mm)
Eudyalite (high relief, white-pale-pink) and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)	Eudyalite (very low interference colors) and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 10x (Field of view = 2mm)	Fuorite (violet), arfvedsonite (green) and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
Rosenbuschite (small beige crystals), arfvedsonite (green), eudyalite (high relief, white-pale-pink) and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)	Rosenbuschite, eudyalite (very low interference colors), arfvedsonite and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 10x (Field of view = 2mm)	Rosenbuschite (small beige crystals), arfvedsonite (green) and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
Rosenbuschite, arfvedsonite and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 10x (Field of view = 2mm)	Rosenbuschite (small beige crystals), arfvedsonite (green) and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)	Rosenbuschite, arfvedsonite and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 10x (Field of view = 2mm)
Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). In the right corner there is a fibrous rosenbuschite crystal (beige color). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 1x (Field of view = 9mm)	Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). In the right corner there is a fibrous rosenbuschite crystal (beige color). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 1x (Field of view = 9mm)	Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). To the right there are some fibrous rosenbuschite crystals (beige color). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)
Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)	Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)	Arfvedsonite, feldspar and nepheline (gray), fluorite (isotropic). Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 2x (Field of view = 7mm)
Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)	Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)	Arfvedsonite, feldspar and nepheline (gray), fluorite (isotropic). Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 10x (Field of view = 2mm)
Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)	Arfvedsonite, feldspar and nepheline (gray), fluorite (isotropic). Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 10x (Field of view = 2mm)	Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)	Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)	Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)	Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)	Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)	Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)	Microcline crystal. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 10x (Field of view = 2mm)
Microcline crystal. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 10x (Field of view = 2mm)	Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)	Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
Fibrous rosenbuschite crystal (beige in color). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)	Fibrous rosenbuschite crystal (yellow birefringence coloros). Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 2x (Field of view = 7mm)	Prismatic rosenbuschite crystals (beige in color). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)
Prismatic rosenbuschite crystal (beige in color). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)	Prismatic rosenbuschite crystal (gray birefringence coloros). Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 10x (Field of view = 2mm)	Prismatic rosenbuschite crystal (beige in color). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
Fibrous rosenbuschite crystal (beige in color). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)	Fibrous rosenbuschite crystal (beige in color). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)	Fibrous rosenbuschite crystal (beige in color). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
Fibrous rosenbuschite crystal (gray birefringence coloros). Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 10x (Field of view = 2mm)	Fibrous rosenbuschite crystal (beige in color). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 20x (Field of view = 1mm)	Fibrous rosenbuschite crystal (beige in color). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 20x (Field of view = 1mm)
Fibrous rosenbuschite crystals (beige in color). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 20x (Field of view = 1mm)	Fibrous rosenbuschite crystals (beige in color). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 20x (Field of view = 1mm)	Fibrous rosenbuschite crystals (yellow birefringence coloros). Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 20x (Field of view = 1mm)