REPORT OF THE CHIEF ASTRONOMER 



343 



SESSIONAL PAPER No. 25a 



Analysis of Bossland monzonite. 



Si0 2 54-49 



Ti0 2 -70 



A1 2 3 1W1 



Fe,0 3 2-79 



FeO 5-20 



MnO -10 



MgO 3-55 



CaO 7-06 



NjuO 3-50 



K 2 436 



H 2 at 110°C -07 



H 2 above 110°C 1-18 



PA -20 



C0 2 -10 



S -23 



CuO none 



100-04 



Mol. 



009 

 162 

 018 

 072 



•001 



089 

 126 

 056 

 047 



001 

 007 



The calculated norm is : — 



Orthoclase 26-13 



Albite 29-34 



Anorthite 16«40 



Diopside 14-56 



Hypersthene 2-76 



Olivine 3-04 



Magnetite 4-18 



Ilmenite 1-36 



Pyrite -84 



Apatite -31 



Water and CO, 1-35 



100-27 



According to the Norm classification the rock enters the sodipotassic sub- 

 rang, monzonose, of the domalkalic rang, monzonase, in the dosalane order, 

 germanare. According to the older, Mode,- classification it is a typical mon- 

 zonite. 



The chemical relations of this rock to the Rossland latites and to the 

 calculated world-average for monzonite (reduced to 100 per cent) are showa 

 in Table XXELT. 



