Ivigtut

I´d like to thank O.V.Petersen for informations taken from his articles and J.P.Frisch and R.Schoeler for specimens.

In 1906 the deposit was discovered, though specimens of cryolite had been know before (and described in 1802). Mining for cryolite began already in 1854 and lasted until 1987. By now the mine is closed.

The cryolite orebody (mostly cryolite, less siderite and sparse quartz, sulfides and fluorite) originally formed an irregular mass of 50x155x70 meters. Below that there was a siderite zone and in some areas a fluorite zone. All of the orebody was enclosed in a granite stock an 300 meters in diameter. So far the mechanism of formation is under discussion: the favorite version is that the cryolite is a pegmatitic or pneumatolytic formation in the granite. Adjactent to the orebody there is a pegmatite zone to the west.

You´ll be missing eudialyte here, but I decided to include Ivigtut in these pages, as not doing so would have meant to leave out St.Peter´s Dome and Gjerdingen.

Please keep in mind, that the multitude of sulfides can be seen under the (ore)microscope only.


Mineral list: (Bold = type locality)

Acanthite
Acuminite
Aikinite
Albite
Arcubisite
Arsenopyrite
Barite
Berryite
Biotite
Bismuth
Bismuthinite
Boeggildite
Boegvadite
Boehmite
Boulangerite
Bournonite
Canfieldite
Cassiterite
Celestine
Chalcopyrite
Chalcocite
Chiolite
Chlorite-group
Coffinite
Columbite-group
Cosalite
Covellite
Cryolite
Cryolithionite
Cubanite
Diaspore
Elpasolite
Emplectite
Enargite
Eskimoite
Fluorapatite
Fluorite
Freibergite
Galena
Gearksutite
Goethite
Gold
Gustavite
Hematite
Hessite
Hornblende-group
Ikaite
Ilmenite
Jarlite
Joergensite
Kaersutite
Kaolinite
Kesterite
Lepidocrocite
Mackinawite
Magnetite
Malachite
Marcasite
Matildite
Microcline
Molybdenite
Muscovite
Orthoclase
Pachnolite
Prosopite
Pyrargyrite
Pyrite
Pyrrhotite
Quartz
Ralstonite
Rutile
Siderite
Silver
Sphalerite
Stannite
Stenonite
Teallite
Thomsenolite
Thorite
Thorogummite
Topaz
Uraninite
Vikingite
Volynskite
Weberite
Wittichenite

Wolframite

Wulfenite

Zinnwaldite

Zircon

&Suggested reading:

Petersen,O.V., K.Secher: The minerals of Greenland, Mineralogical Record, 24(1993), 2, pp.29-36

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