GEOLOGY OF THE LONG LAKE QUADRANGLE 



513 



Chemical composition 



and 



norm of basic 



syenite ( 



C2-I-6) 1 







Chem. 

 comp. 



Mol. 

 ratio. 



Or. 



Ab. 



An. 



Di. 



Hy. 



Mag. 



Ap. 



Ti. 



Qz. 



Py. 



SiO a 



S4.IO 



17-45 

 4-52 

 6.47 

 2-33 

 6. 17 

 3.81 

 3 .06 

 0.48 



.902 

 .171 

 .028 

 .090 

 .058 

 . no 

 .061 

 •033 



. 196 

 -033, 



.368 

 .061 



•154 

 .077 



.026 



. 107 







. 002 



.048 





A1 2 3 ...... 



Fe 2 3 















.028 











FeO 









. 007 



.050 

 .052 



.028 





.002 







MgO 



CaO 









. 006 











.076 



.013 





. 02 1 









Na 2 



•o33 



nfiT 



' 















K 2 





















H 2 + ..... 





















H 2 0— 



.09 

 . iq 

 0.88 



.05 

 . 14 



0-35 

 . 10 

























Ti0 2 



.002 

 .006 

 .003 



.004 

 .005 

 .001 























P 2 5 















. 006 









F 

















.003 









S 



. 004 



MnO 











. 00^ 













BaO 







• OOl 







































Total. . . 



IOO . IQ 

 .06 





•°33 



.06l 



.077 



.026 



.107 



.028 .006 



.002 



.048 



.002 





IOO.I3 



Zr0 2 , Cr 2 3 and CI absent 



Or.. . 

 Ab. . 

 An. . 

 Qz... 

 Di... 

 Hy.. 

 Mt. . 

 Ti... 

 Ap.. 

 Py.. 



18.13 

 32.17 

 21.43 

 2.86^ 



3-05] 

 12.50 



6.571 

 0.36 

 2 .09 

 o . 26 



Sal. 



74-59 



24.83 



Total. 99.42 



Class, _ — = 



Order, 



Rang, 



7 4-59 

 Fem. 24.83 

 Q 2.86 



3.00 



tt = dosalane 



F 71.73 

 Na 2 0' + 



= .04 = 5, germanare 

 K 2 0' 



Subrang, - 



CaO' 

 K 2 0' 



94o 

 1102 



= -- — = .85 = 3. andase 



3 2 



Na 2 0' 61 



= -53 = 4, 



andose, but near 

 shoshonose 



As usual with these rocks the ferrous iron determination was 

 unsatisfactory from some cause not yet clear, the result of the 

 analysis showing 10.96 FeO out of a total iron of 10.99. In this case 

 there is a possibility that the pyrite may be accountable for the 

 discrepancy, but it is very unlikely that this is the case since the 

 trouble is constant in the rock group and the pyrite is occasional. 

 The microscopic analysis showed a considerable percentage of mag- 

 netite present, the amount of which was checked by separating the 

 magnetite from a certain portion of the rock, so that the result 



I Sp. Gr. 2.g64 at i8°. Analyst, E. W. Morley. 



