GEOLOGY OF THE BROADALBIN QUADRANGLE 



19 



Si O2. 71 



AI2 O3 13 



Fea O3.... I 



Fe O I 



Mg O 



Ca O.... I 



Na= O 



K3 o.. 



H2 O. 

 Ti O2. 



Mn O. 

 Ba O. 

 S 



CI ... 



F 



Zr O. 



100.04 



The norm and place of this rock in the quantitative chemical 

 classification are calculated as follows : 



Per 

 cent 



Mol. 



Ilm. 



Apat. 



Orth. 



Alb. 



An. 



Cor. 



Mag. 



Hyp. 



Qtz. 



Si O2. 

 AI2 O, 

 Fe2 O3 

 FeO.. 

 MgO. 

 CaO. 

 Na2 O 

 K3 O.. 

 Ha O.. 



PS'- 



Mn6. 



S 



CL... 



F 



BaO. 

 ZrO.. 



71.45 

 13.83 

 1. 10 

 1. 91 

 .561 

 1.44^ 

 2.62I 

 6.091 

 .32} 

 .42 J 



• 17 

 .02 

 .03 

 .01 

 .02 

 .02 



1 . 191 

 .135 

 .007 

 .026 

 .014 

 .026 

 .042 

 .065 



.005 



.0002 



.003 



390 

 65 



65 



252 



42 



31 



468 



Alb.. 



22 .01 



■ Sal.= 93.49 



An... 



6.95 





Cor.. 



•31 . 





Hyp. 



3.64^ 





Mag. 

 Ilm.. 



1.62 

 .76 



Fem.= 6.08 



Apat. 



.06 





Class, 



Order, 



Sal. 93.49 



Fem. 



Q 



6.08 

 28.08 



65.10 



7/1 =1, Persalane 



< 3/5 > 1/7 = 4. Brittanare 



K2O + NaaO 107 



Rang, = < 7/1 > 5/3 = 2, Toscan- 



Ca O 26 ase 



Subrang, 



K2O 



65 



Na20 



< 5/3 > 3/5 = 3. Toscanose 



42 



99 • 57 



