FT EOvETSRENEUT SRF ee 
JOG få j 
A N:o 1) Igneous Rocks of Sviatoy Noss in Transbaikalia. 75) 
I II III IV V VI 
SORR SbRr RESAS 5 30.44 34.85 | 34.38 
1:03 -0:97-" 0:51 0:44 -— — == 
NEO öL0:-r0.5067 LA 1.26 25105) 6.36 
Hess LI.J2 19:10--19:74 29.18 29.03 19.99 
eOESEÖA2 JD BOM 0.41 0.19 6.24 
WR OT=054750:83-— 0.74 0.48 0.35 0.60 
MgO 0.84 0.10 0.00 — 0.12 0.07 
CaO 31.16 30.53 31.06 32.62 32.90 31.34 
Na3.:0 0.00 0.00 — 0.38 trace — 
00:00-;-0.00-- = 0.08 225 505:0:005 
ROR 0.03--0:135 600005 H5O00:16 0.61 
100.38 99.65 100.11 99.94 — 99.79 99.685 
By a comparison of these analyses we are aware that 
analvsis I could very well represent a skarn-andradite as 
well. The ratio Fe,0O3: Al;O3 in these garnets is somewhat 
variable, but we see this ratio in the andradite from the 
sviatonossite to be one that is very common in the skarn- 
andradites, too. The percentage of FeO is nearly identical 
in all and so is the percentage of MnO. A constant character- 
istic of the skarn-andradite is a low percentage of TiO3. 
&= "In this respect our garnet differs somewhat from these, 
containing a little more 7TiO,. But, as was remarked above, 
this difference may be due to the enclosed crystals of titanite 
in this garnet. There remains still a slight difference in the 
amount of MgO, which in the skarn garnets is constantly 
almost negligible, but in the garnet in question is rather 
considerable. ; 
Let us now turn to compare the andradite from the 
sviatonossite with lime-iron garnets from igneous rocks. 
They have been found almost exclusively in alkaline, mostly 
in nephelite-bearing rocks and the available analyses are not 
very numerous. For comparison, we quote again the analysis 
of the garnet from the sviatonossite (I). II is the analysis 
of andradite from the nephelite-syenite from Dungannon 
