Kakortokite

Kakortokite: a variety of agpaitic nepheline syenite displaying pronounced cumulate textures and igneous layering with a repetition of layers enriched in alkali feldspar, eudialyte and arfvedsonite. From Kakortok (now Qaqortoq), Ilímaussaq, Greenland; Ussing, 1912


For more information about the Ilímaussaq magmatic complex, see page: "Ilimaussaq"

Sample kindly given to me by Robert Gill.

ilimaussaq2017(6).jpg

The layered kakortokites from north slopes of Kangerdluarssuk.



kakortokite(andy)(1).jpg

Panoramic view of a kakortokite. Image by Andy Tindle (Virtual Microscope). PPL image, field of view = 2.5cm. See also kakortokite - Virtual Microscope for more information on kakortokite.




kakortokite(andy)(2).jpg

Panoramic view of a kakortokite. Image by Andy Tindle (Virtual Microscope). XPL image, field of view = 2.5cm. See also kakortokite - Virtual Microscope for more information on kakortokite.






Bibliography



• G.Markl; M.Marks; G.Schwinn e H.Sommer (2001): Phase Equilibrium Constraints on Intensive Crystallization Parameters of the Ilímaussaq Complex, South Greenland. Journal of Petrology. Num.12; vol. 42; pg: 2231–2258.
• S. Karup-Møller; J. Rose-Hansen (2013): New data on eudialyte decomposition minerals from kakortokites and associated pegmatites of the Ilimaussaq complex, South Greenland. In: Geological Society of Denmark. Bulletin, Vol. 61, 2013, p. 47-70.


Photo
kakortokite(1).jpg

Arfvedsonite crystals in a kakortokite. Ilímaussaq, Greenland. PPL image, 2x (Field of view = 7mm)
kakortokite(2).jpg

Arfvedsonite crystals in a kakortokite. Ilímaussaq, Greenland. XPL image, 2x (Field of view = 7mm)
kakortokite(3).jpg

Arfvedsonite and alkali feldspar crystals in a kakortokite. Ilímaussaq, Greenland. PPL image, 2x (Field of view = 7mm)
kakortokite(4).jpg

Arfvedsonite and alkali feldspar crystals in a kakortokite. Ilímaussaq, Greenland. XPL image, 2x (Field of view = 7mm)
kakortokite(5).jpg

Arfvedsonite and alkali feldspar crystals in a kakortokite. Ilímaussaq, Greenland. PPL image, 2x (Field of view = 7mm)
kakortokite(6).jpg

Arfvedsonite and alkali feldspar crystals in a kakortokite. Ilímaussaq, Greenland. XPL image, 2x (Field of view = 7mm)
kakortokite(7).jpg

Arfvedsonite, alkali feldspar and eudyalite (Eud label) crystals in a kakortokite. Ilímaussaq, Greenland. PPL image, 2x (Field of view = 7mm)
kakortokite(8).jpg

Arfvedsonite, alkali feldspar and eudyalite (gray) crystals in a kakortokite. Ilímaussaq, Greenland. XPL image, 2x (Field of view = 7mm)
kakortokite(9).jpg

Arfvedsonite and alkali feldspar crystals in a kakortokite. Ilímaussaq, Greenland. XPL image, 2x (Field of view = 7mm)
kakortokite(10).jpg

Arfvedsonite and alkali feldspar crystals in a kakortokite. Ilímaussaq, Greenland. XPL image, 2x (Field of view = 7mm)
kakortokite(11).jpg

Eudyalite crystals with arfvedsonite inclusions in a kakortokite. Ilímaussaq, Greenland. PPL image, 2x (Field of view = 7mm)
kakortokite(12).jpg

Arfvedsonite and alkali feldspar crystals in a kakortokite. Ilímaussaq, Greenland. XPL image, 2x (Field of view = 7mm)
kakortokite(13).jpg

Arfvedsonite crystals in a kakortokite. Ilímaussaq, Greenland. XPL image, 2x (Field of view = 7mm)
kakortokite(14).jpg

Arfvedsonite crystals in a kakortokite. Ilímaussaq, Greenland. PPL image, 2x (Field of view = 7mm)
kakortokite(15).jpg

Arfvedsonite and eudyalite (Eud label) crystals in a kakortokite. Ilímaussaq, Greenland. PPL image, 2x (Field of view = 7mm)
kakortokite(16).jpg

Arfvedsonite and eudyalite (gray) crystals in a kakortokite. Ilímaussaq, Greenland. XPL image, 2x (Field of view = 7mm)
kakortokite(19).jpg

Arfvedsonite and alkali feldspar crystals in a kakortokite. Ilímaussaq, Greenland. PPL image, 2x (Field of view = 7mm)
kakortokite(20).jpg

Arfvedsonite and alkali feldspar crystals in a kakortokite. Ilímaussaq, Greenland. XPL image, 2x (Field of view = 7mm)
kakortokite(21).jpg

Arfvedsonite, alkali feldspar and eudyalite (Eud label) crystals in a kakortokite. Ilímaussaq, Greenland. PPL image, 2x (Field of view = 7mm)
kakortokite(22).jpg

Arfvedsonite, alkali feldspar and eudyalite (gray) crystals in a kakortokite. Ilímaussaq, Greenland. XPL image, 2x (Field of view = 7mm)
kakortokite(23).jpg

Arfvedsonite and alkali feldspar crystals in a kakortokite. Ilímaussaq, Greenland. PPL image, 2x (Field of view = 7mm)
kakortokite(24).jpg

Arfvedsonite and alkali feldspar crystals in a kakortokite. Ilímaussaq, Greenland. PPL image, 2x (Field of view = 7mm)
kakortokite(25).jpg

Arfvedsonite and alkali feldspar crystals in a kakortokite. Ilímaussaq, Greenland. XPL image, 2x (Field of view = 7mm)
kakortokite(26).jpg

Arfvedsonite and alkali feldspar crystals in a kakortokite. Ilímaussaq, Greenland. XPL image, 2x (Field of view = 7mm)
kakortokite(27).jpg

Arfvedsonite, alkali feldspar and eudyalite (Eud label) crystals in a kakortokite. Ilímaussaq, Greenland. PPL image, 2x (Field of view = 7mm)
kakortokite(28).jpg

Arfvedsonite, alkali feldspar and eudyalite (gray) crystals in a kakortokite. Ilímaussaq, Greenland. XPL image, 2x (Field of view = 7mm)
kakortokite(29).jpg

Arfvedsonite and alkali feldspar crystals in a kakortokite. Ilímaussaq, Greenland. PPL image, 2x (Field of view = 7mm)