GEOLOGY OF THE LONG LAKE QUADRANGLE 



513 



Chemical composition and norm of basic syenite (12-1-6)' 





Chem. 

 comp. 



Mol. 

 ratio. 



Or. 



Ab. 



An. 



Di. 



Hy. 



Mag. 



Ap. 



Ti. 



Qz. 



Py. 



Si02 



54- 10 

 17-4,5 

 4.52 

 6.47 

 2-33 

 6.17 

 3.81 

 3 .06 

 0.48 



.902 

 .171 

 .028 

 .090 

 .058 

 . no 

 .061 



■ 033 



. iq6 



•°33 



. ■^68 - T CA 



.026 



.107 







. 002 



.048 





A1.03 



Fe303 



FeO 



.061 



.077 















.028 







^ 



. 002 









. 007 



.050 

 .052 



.028 





.002 







MgO 



CaO 

















.... 076 



.013 













NajO - 



■033 



.061 

















K2O 





















H,0+ 





















H,0— 



0.09 



0. IQ 

 0.88 



0.05 



0. 14 



0-35 

 0. 10 

























TiOz 



.002 

 .006 

 .003 

 .004 

 .005 

 .001 

















002 







P2O5 















.oft6 









F 















. 00^ 









S 





















. 004 



MnO 







.001 





.005 













BaO 



































Total.. . 



100 . IQ 

 .06 





•033 



.061 



.077 .026 



.107 



.028 .006 



.002 



.048 



.002 





100 . IT, 



ZrOj, CraOj and CI absent 



Or.. . 

 Ab. . 

 An. . 

 Qz-.. 

 Di... 

 Hy.. 

 Mt. . 

 Ti... 

 Ap.. 



Py.. 



18. 13 



32.17 



21-43 

 2 . 86 J 



3-05 j 

 12 .50 



6.57 

 0.36 

 2.091 

 0.26 



74-59 



24.83 



Total. 99.42 



Class, 

 Order, 



Rang, 



Fern. 



Q 2 



74^Q 

 24.83 



3 .00 = IT = dosalane 



F 71-73 



Na^O " + K20' 

 CaO' 



04 = 5, germanare 



Subrang, 



Na.O 



32 

 61 



940 o J 



= — = .8? = ^. andase 

 1102 ^ ■^ 



.53 = 4, andose, but near 

 sboshonose 



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.q64 at 18°. Analyst," E. W. Morley, 



