GEOLOGY OF THE LONG LAKE QUADRANGLE 



.521 



Analysis and norm of red syenite (monzonose), 10-B-21 





Chem. 

 comp. 



Mol. 

 ratio. 



Or. 



Ab. 



An. 



Di. 



Hy. 



Mt. 



Ti. 



Ap. 



Qz. 



Si02 



A1203 



62.85 



16.80 



2 .96 



2.8q 



1.48 



3-24 

 4.09 



5-49 

 .24 

 0. 13 

 .09 

 0.13 



O.OI 



.02 

 0.21 



0.06 



1.047 

 .165 

 .018 

 .040 



•037 

 .058 

 .066 

 .058 



■350 

 .058 



■396 

 .066 



.081 

 . 040 



.028 .048 



. . . . ! .001 





•143 



FezOs 





.018 







FeO 









.006 .016 

 . 008 . 020 



.018 









MgO 















CaO 







.040 



.014 



■ 





.001 



.003 





Na^O 





066 









K,0 



.058 



















H2O + 



















H2O— 





















Ti02 



.001 

 .001 















.... 



.001 







P2OS 















.001 





F 



















s 























MnO 



.003 











.003 











BaO 







































Total 



100.69 





.058 



.066 



.040 



.028 



.048 .018 



1 



.001 



.001 



■143 







Or.. 

 Ab. , 



An. , 



Qz.. 



Di.. 

 Hy. 

 Mt. . 

 Ap.. 

 Ti... 



32.47 



34-58^ 86.87 

 II . 20 I 

 8.62 J 



3.19] 



5.421 



4.29 [ 13-43 



0.31 



0.22 



Total 100 .30 



Class, = — ^ = 



Order, S 

 F 



Fem. 



86.87 



13.43 

 .62 



= 6.47 = II, dosalane 



78.25 

 K2O' + Na20' 



5, germanare 



124 



78^ 



2.1 = 2, monzonase 



^^^^' CaO- 



c T, K O- 59 



hubrang, r^^^ — ^^- = ^^ = .9 = 3, monzonose 



On the border between classes I and II, hence close 

 to pulaskose. 



A comparison of the two analyses shows a reasonably close agree- 

 ment in all respects, and indicates that microscopic analysis fur- 

 nishes a means of quite accurate determination of the composition 

 of these rocks. It shows that the feldspars have closely the as- 

 sumed composition, and that the hornblende is probably lower in 

 silica and higher in iron than the Californian hornblende used in 

 the calculation. The norm calculated from the result of the micro- 

 scopic analysis would closely agree with the other, and serve equally 

 for classifying the rock. 



A comparison of the analysis with those of the green syenites 

 shows a close agreement, the main differences being the different 

 ratio between the iron oxids and the lower magnesia of the green 



I Sp. Or. 2.735 at 18°. E. W. Morley, analyst. 



