246 
Dr. Fur has written a memoir “Оп the Minerals from 
Narsarsuk” in which an exhaustive account of most of the 
minerals from this place is given, accompanied by a descrip- 
tion and diagram of the place itself!. By undertaking a number 
of minor excavations he found that all the minerals in question 
originate in irregular pegmatitic segregations of syenite. In 
some of the specimens which Fink has collected the pegmatite 
is in contact with a white quartziferous sandstone, probably 
occurring in fragments in the syenite. The pegmatitic rock 
mainly consists of felspar and ægirine with some quartz and a 
little eudialyte, and most of the rare minerals are found in small 
cavities in the pegmatite. As may be seen from the map 
(PI. IV) the place is only a few hundred meters away from the 
point of contact between the augite-syenite and the sandstone 
to the westward of that which dips to the east at the junction. 
Consequently the pegmatites may be said to belong to the 
border facies of the augite-syenite, and with so much more 
reason as the augite-syenite itself has a somewhat porphyric 
structure in the mineral locality. 
As to the minerals from this place the following are found 
in large crystals especially well developed: synchysite, epidi- 
dymite, albite, ægirine, catapleiite, elpidite, and neptunite. А 
complete list is given in the table over-leaf. The entire list 
of minerals is also entered in the table for all the localities 
belonging to the Ilimausak batholite (i. e. the mineral localities 
which in mineral collections are usually indicated Kangerdluar- 
suk, Naujakasik, and Siorarsuit) because a comparison is of 
interest, considering the large geological differences between 
both batholites. In the list all such minerals have been omitted 
which are only identified by microscopic examination. The 
1 G. Емхк, On the Minerals from Narsarsuk. Meddelelser om Grønland 
XXIV, 1899. In the diagram accompanying Dr. Етлхк’з treatise (Pl. IX: 
the sandstone west of the mineral locality has wrongly been indicated 
as granite. 
