REPORT OF THE CHIEF ASTRONOMER 



327 



SESSIONAL PAPER No. 25a 



alteration has led to the formation of kaolin, uralite, sericite, epidote, zoisite, 

 chlorite, carbonate, and a little quartz. Orthoclase was apparently never indi- 

 vidualized. 



Mr. Connor's analysis resulted as follows (Table XX., Col. 1) : — ■ 



Table XX. — Analyses of aiugite-biotite latite. 



Si0 2 



Ti0 2 



AL0 3 



Fe 2 3 



FeO 



MnO 



MgO 



CaO 



SrO 



BaO , 



Na^O 



K 2 



H 2 at 110°C. . 

 H,0 above 110°C. 



P,O s .. 



C0 2 



FeS 2 



C 



1. 



la. 

 Mol. 



2. 



59-06 



984 



62-33 



1-08 



814 



1-05 



16-24 



159 



17-35 



•43 



•003 



2-98 



4-88 



068 



1-63 



•20 



003 



•08 



3-51 



088 



105 



5-59 



■100 



3-23 



•12 



001 



•05 



•11 



■001 



•24 



2-84 



046 



4-21 



3-95 



042 



4-46 



•21 





•44 



•19 





•75 



•21 



001 



•29 



•70 





"•08 

 •11 



99-32 



100-33 



Sp. gr. 



2-796 



In the Norm classification the rock enters ;he sodipotassic subrang, shos- 

 honose, of the alkalicalcic rang, andase, in the dosalane order germanare. The 

 norm is as follows: — 



Quartz.. .. 

 Orthoclase. 

 Albite. 



Anorthite. . . 

 Hypersthene. 

 Diopside.. .. 

 Ilmenite.. .. 

 Magnetite. . . 



Apatite 



H,0 and CO, 



8-64 

 23-35 

 24-10 

 19-74 

 12-78 



6-40 



213 

 •70 

 •31 



1-10 



99-25 



In the older classification this variety is clearly a biotite-augite latite. 

 In Col. 2 of Table XX, the analysis of one of Ransome's types, that from near 

 Clover Meadow, California, is entered. The alkalies are a little lower, in the 

 British Columbia rock, but the respective differences are too small to cause 

 doubt as to the classification. 



