﻿N23 

 CAanitc 



302 Canadian Record of Science. 



at right angles, no more ore is found. It may be that the 

 dyke appeared before the ore did, though at first sight 



this seems un- 

 likely. The 

 dyke walls are 

 slickensided. 

 Figure 3 il- 

 -'/^' r^ /^^ * ' "^ViC lustrates this 

 piaK occurrence. 



In addition to these three main classes of ore bodies 

 there are many modifications in filling material and in 

 structure. These, however, are not important, with the 

 exception of a widely represented class, which occurs 

 along the upper waters of Lemon Creek. They are low 

 grade, patchy galena bodies in a silicious gangue. At 

 times these may be very rich in silver also. They have 

 little or no gold. 



Another more important class is a sugar grained quartz 

 vein, which carries some pyrites and galena as well as 

 a fair proportion, say, 40% of free milling gold. These 

 ore bodies are physically like Class I. They occur south 

 of Lemon Creek. In one place on Lemon Creek there 

 is an occurrence of free gold and galena intimately asso- 

 ciated, but this is rare. 



Concerning the small areas of dark cleavable rock, 

 microscopical examination goes to show that they are 

 very finely grained, altered sedimentaries. An analysis 

 of one gave : — 



SiO^ 61-74 



AlA and FeA 1966 



CaO 14-00 



MgO 2-28 



K^O :N"otdet. 



Na^O 



Total 97-68 



Iron pyrites is also present. 



