GEOLOGY OF THE LONG LAKE QUADRANGLE 



519 



The mode of the rock of analysis 8 showed 1.86% of Fe 2 3 , and 

 the original analysis was corrected on this basis, so far as the iron 

 values are concerned. The norm, and position of the rock in the 

 new classification are as follows: 



Norm of pyroxenic hornblende-toscanose (analysis 8) 





Chem. 



comp. ■ 



Mol. 

 ratio. 



Or. 



Ab 



An. 



Di. 



Hy. 



Mt. 



Ap. 



Qz. 



SiO, 



68.50 

 14 .60 



1 -34 

 3- 2 5 

 . 26 



2 . 20 

 3 -5o 



5-9° 



. 40 

 . 03 

 . 10 

 0.05 



100 . 22 



I . 142 



• 144 



.008 



•045 

 .007 



•039 

 .056 

 .063 



•376 

 .063 



.339 .oco 



.028 



.031 







TrP 



A1 2 0/. 



.056 



.025 









Fe 2 3 



FeO 







.008 

 .008 













.012 

 . 002 

 .014 



.025 

 .005 







MgO 













CaO 







• ° 2 5 





. 0007 





Na z O 



■ 0( \3 



.056 











K 2 















H 2 

















P 2 O s 



.0002 

 .001 















. 0002 





MnO 











. 001 







BaO.. . 























1 













Total 





. 063 - oc6 





 .02 s . 02H 



. 03 1 - 008 





?t8 









• 







" 









Or... 

 Ab. . 

 An. . 



Qz... 



5.y- 



Di... 



Ap.. 

 Mt. . 



Class, 



ll i = 9Q- 43 ^ 



9° -43 



9.29 



Sal 



Fern. 929 



A , Q 10 . 09 , . 



Order, ^ = —■ — 7 = .27 = 4, bntannare 



F 7^-34 



K 2 0' + Na 2 0' ti 9 



Rang, = — y = 3.1 =2, toscanase 



CaO 39 



c u k ^O 63 



Subrang, AT - - = -°- ==■- 1.1 

 s Na 2 0' 56 



= 9.8 = i, persalane 



^3 — 3, toscanose 



Total 99.72 



Because of its greater acidity this rock is a fairly normal tos- 

 canose, instead of being on the pulaskose border, the quartz 

 being to the feldspar as 1:4 instead of 1 : 6 as in the previous 

 case. 



Red syenites. It has been shown that on the southern 

 margin of the Tupper syenite a considerable mass of red syenites 

 and granitic syenites occurs, showing apparent gradations into the 

 normal syenite, though it is not yet definitely established whether 

 it is a differentiate from that or a separate intrusion. The rock is 

 usually evenly granular and gneissoid, though often showing small, 

 porphyritic feldspars, but it runs into coarsely porphyritic varieties. 

 The tendency of the quartz to assume the leaf, or spindle types is 

 even more pronounced than in the green syenite. The analyses 



