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.

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
lakarpite(1).jpg

Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 1x (Field of view = 9mm)
lakarpite(2).jpg

Arfvedsonite, feldspar and nepheline (gray), fluorite (isotropic). Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 1x (Field of view = 9mm)
lakarpite(3).jpg

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)
lakarpite(4).jpg

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)
lakarpite(5).jpg

Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 1x (Field of view = 9mm)
lakarpite(6).jpg

Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 1x (Field of view = 9mm)
lakarpite2017(3).jpg

Arfvedsonite (green), fluorite (violet) and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)
lakarpite2017(5).jpg

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)
lakarpite2017(6).jpg

Arfvedsonite, eudyalite (very low interference colors) and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 2x (Field of view = 7mm)
lakarpite2017(7).jpg

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)
lakarpite2017(8).jpg

Arfvedsonite, eudyalite (very low interference colors) and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 2x (Field of view = 7mm)
lakarpite2017(9).jpg

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)
lakarpite2017(10).jpg

Arfvedsonite, eudyalite (very low interference colors) and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 2x (Field of view = 7mm)
lakarpite2017(11).jpg

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)
lakarpite2017(12).jpg

Rosenbuschite, eudyalite (very low interference colors) and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 2x (Field of view = 7mm)
lakarpite2017(13).jpg

Eudyalite (high relief, white-pale-pink) and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)
lakarpite2017(14).jpg

Eudyalite (very low interference colors) and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 2x (Field of view = 7mm)
lakarpite2017(15).jpg

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)
lakarpite2017(17).jpg

Arfvedsonite and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)
lakarpite2017(18).jpg

Arfvedsonite and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 2x (Field of view = 7mm)
lakarpite2017(19).jpg

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)
lakarpite2017(21).jpg

Arfvedsonite, eudyalite (high relief, white-pale-pink) and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)
lakarpite2017(22).jpg

Arfvedsonite, eudyalite (very low interference colors) and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 2x (Field of view = 7mm)
lakarpite2017(23).jpg

Arfvedsonite and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)
lakarpite2017(24).jpg

Arfvedsonite and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 2x (Field of view = 7mm)
lakarpite2017(25).jpg

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)
lakarpite2017(26).jpg

Eudyalite (very low interference colors), Rosenbuschite and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 2x (Field of view = 7mm)
lakarpite2017(29).jpg

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)
lakarpite2017(30).jpg

Rosenbuschite, eudyalite (very low interference colors) and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 10x (Field of view = 2mm)
lakarpite2017(31).jpg

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)
lakarpite2017(32).jpg

Rosenbuschite, eudyalite (very low interference colors) and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 10x (Field of view = 2mm)
lakarpite2017(33).jpg

Eudyalite (high relief, white-pale-pink) and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
lakarpite2017(34).jpg

Eudyalite (very low interference colors) and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 10x (Field of view = 2mm)
lakarpite2017(35).jpg

Eudyalite (high relief, white-pale-pink) and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
lakarpite2017(36).jpg

Eudyalite (very low interference colors) and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 10x (Field of view = 2mm)
lakarpite2017(37).jpg

Fuorite (violet), arfvedsonite (green) and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
lakarpite2017(42).jpg

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)
lakarpite2017(43).jpg

Rosenbuschite, eudyalite (very low interference colors), arfvedsonite and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 10x (Field of view = 2mm)
lakarpite2017(44).jpg

Rosenbuschite (small beige crystals), arfvedsonite (green) and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
lakarpite2017(45).jpg

Rosenbuschite, arfvedsonite and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 10x (Field of view = 2mm)
lakarpite2017(67).jpg

Rosenbuschite (small beige crystals), arfvedsonite (green) and feldspar (colorless). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
lakarpite2017(68).jpg

Rosenbuschite, arfvedsonite and feldspar. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 10x (Field of view = 2mm)
lakarpite(14).jpg

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)
lakarpite(15).jpg

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)
lakarpite(16).jpg

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)
lakarpite(18).jpg

Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)
lakarpite(19).jpg

Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)
lakarpite(20).jpg

Arfvedsonite, feldspar and nepheline (gray), fluorite (isotropic). Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 2x (Field of view = 7mm)
lakarpite(29).jpg

Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)
lakarpite(31).jpg

Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
lakarpite(32).jpg

Arfvedsonite, feldspar and nepheline (gray), fluorite (isotropic). Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 10x (Field of view = 2mm)
lakarpite(38).jpg

Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
lakarpite(39).jpg

Arfvedsonite, feldspar and nepheline (gray), fluorite (isotropic). Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 10x (Field of view = 2mm)
lakarpite(46).jpg

Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
lakarpite(49).jpg

Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
lakarpite(50).jpg

Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
lakarpite(51).jpg

Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
lakarpite(52).jpg

Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
lakarpite(56).jpg

Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
lakarpite(57).jpg

Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
lakarpite(58).jpg

Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
lakarpite(60).jpg

Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
lakarpite(61).jpg

Microcline crystal. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 10x (Field of view = 2mm)
lakarpite(62).jpg

Microcline crystal. Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 10x (Field of view = 2mm)
lakarpite(64).jpg

Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
lakarpite(66).jpg

Arfvedsonite (green), feldspar and nepheline (colorless), fluorite (violet). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
lakarpite(21).jpg

Fibrous rosenbuschite crystal (beige in color). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)
lakarpite(24).jpg

Fibrous rosenbuschite crystal (yellow birefringence coloros). Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 2x (Field of view = 7mm)
lakarpite(27).jpg

Prismatic rosenbuschite crystals (beige in color). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)
lakarpite(35).jpg

Prismatic rosenbuschite crystal (beige in color). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
lakarpite(36).jpg

Prismatic rosenbuschite crystal (gray birefringence coloros). Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 10x (Field of view = 2mm)
lakarpite(37).jpg

Prismatic rosenbuschite crystal (beige in color). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
lakarpite(40).jpg

Fibrous rosenbuschite crystal (beige in color). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)
lakarpite(41).jpg

Fibrous rosenbuschite crystal (beige in color). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 2x (Field of view = 7mm)
lakarpite(42).jpg

Fibrous rosenbuschite crystal (beige in color). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 10x (Field of view = 2mm)
lakarpite(43).jpg

Fibrous rosenbuschite crystal (gray birefringence coloros). Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 10x (Field of view = 2mm)
lakarpite(44).jpg

Fibrous rosenbuschite crystal (beige in color). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 20x (Field of view = 1mm)
lakarpite(45).jpg

Fibrous rosenbuschite crystal (beige in color). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 20x (Field of view = 1mm)
lakarpite(68).jpg

Fibrous rosenbuschite crystals (beige in color). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 20x (Field of view = 1mm)
lakarpite(69).jpg

Fibrous rosenbuschite crystals (beige in color). Lakarpite from Norra Kärr alkaline complex, Sweden. PPL image, 20x (Field of view = 1mm)
lakarpite(70).jpg

Fibrous rosenbuschite crystals (yellow birefringence coloros). Lakarpite from Norra Kärr alkaline complex, Sweden. XPL image, 20x (Field of view = 1mm)