169 
A. Lujavrite, rich in ægirine, Angwundas, Lujavr-Urt, Kola. 
Z. ХиллАсоз, analyst.! 
В. Eudialyte-lujavrite, Tsutsknjun, Lujavr-Urt, Kola. W. Prrers- 
sox, analyst!. 
С and D. Lujavrite, Pilandsberg, Transvaal. Е. Pisan, analyst’. 
the content of water etc. agree with the results of the micro- 
scopical examination. The very low amount of lime proves 
that the egirine and the eudialyte of this rock are much poorer 
in lime than the varieties of egirine and eudialyte which have 
been analyzed hitherto. Indeed it must be supposed that the 
egirine of this rock has a composition which approaches that 
of the pure acmite-silicate NaFeSi,O,. On this assumption it 
is found by calculation that the Greenlandic lujavrites, of 
which the composition is given in No.s 8, 9, and 16 of the 
table, contain respectively 31, 27, and 34 per cent. of ægirine. 
The rock, thus, has a pronounced melanocratic character. 
For the sake of comparison a number of analyses of other 
typical lujavrites, two from Kola and two from Transvaal, are 
included in the table and it will be seen that they are all very 
much like the Greenlandic rock. 
Contact-facies of ægirine lujavrite. — As before mentioned 
the ægirine-lujavrite has a distinctly marked endomorphic con- 
tact-facies where it borders upon the rocks of the volcanic 
series. Specimens of this contact-modification, taken in the 
mountain-slope northeast of Nunarsuatsiak, about 300 meters 
above the sea-level, are of a grayish-green dense appearance 
and dotted with numerous small prisms of arfvedsonite which 
attain dimensions of 3 millimeters by 0°5 millimeters. As proved 
by the microscopical examination this rock may be characterized 
1 W. Ramsay, Das Nephelinsyenitgebiet auf der Halbinsel Kola Il. Fennia 
XV, No. 2, p. 16 (1899). 
2 H. A. Brouwer, Sur certaines lujavrites du Pilandsberg. Comptes rendus, 
noy. 29th, 1909. 
