Sample MTD04 colected by Michael T. Doel
Described as tugtupite, analcime, sodalite etc.
Rotation 1 -
Rotation 2 - zircon Zr(SiO4)
Rotation 3 - aenigmatite Na2(Fe2+5Ti)SiO20
Rotation 4 - polylithionite KLi2Al(Si4O10)(F,OH)2
Rotation 5 -
Rotation 6 - steenstrupine Na14Mn22+(Fe3+,Mn3+)2Ce6(Zr,Th)(Si6O18)2(PO4)6(HPO4)(OH)2·2H2O
Rotation 7 - arfvedsonite [Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Rotation 8 -
Rotation 9 -
Ilimaussaq is the type locality for arfvedsonite and steenstrupine
Intrusion is dated at 1161±2 Ma
The Ilimaussaq alkaline complex is the type locality for agpaitic nepheline syenites and represents an enormous concentration of rare elements, notably Li, Be, Nb, Zr, REE, Y, Th and U. Around 220 mineral species have been identified. We can't identify all the minerals present in these samples. Email us at email@example.com if you can help.
Note we have recently expanded the collection to include other syenite complexes worldwide.
See also Alex Strekeisen's great website for more information on syenite complexes.