114 
Analyses of arfvedsonite-granite and related rocks. 
1 2 A 
SIO peices se 70°59 71°24 71°65 
MO ee "44 \ 68 ee 
TAX erates een = | 
и | 12°38 13:78 13°04 
Felsen ae | 1:61 1°30 20 
FeO og | 3°33 2°83 1:80 
MO at | 108 15 
MICO We it ее | none trace trace 
а Så | 93 38 trace 
а О-о | 6:95 5°32 6°30 
KORY Sexe Ne | 3°74 510 3°98 
H,O above 110°. . = 1:10 
H3® at 110° - . "20 
ео попе 
| ial и trace 
Total 100°46 100-78 100-66 
Sp. gr 2:657 2:64! 
analyst. 
DETLEFSEn, analyst. 
1. Arfvedsonite-granite, Uimausak, S. Greenland. 
С. WINTHER, 
2. Soda-granite, Iviangusat, Kangerdluarsuk, S. Greenland, C. 
. Soda-granite, Hougnatten, Lougendal, Norway. L. Эснметск, 
analyst (W. С. Brôccer, Die Eruptivgesteine des Kristiania- 
gebietes I 1894, p. 127). 
About one third of the felspar is potash-felspar, the rest 
is soda-felspar. 
Pure arfvedsonite-granites like the one described here — 
1 Determination by Dr. К. J. У. STEENSTRUP. 
