﻿300 Canadian Record of Scieiice. 



Although tlie argentite, as far as known, carries little 

 or no gold, there appears to be a direct ratio between the 

 value of gold and silver in any one vein, or part of it. In 

 the area defined as belonging peculiarly to this class 

 of ores, there are few veins of any other character, save 

 some doubtful replacement zones of low grade galena, 

 and some quartz veins which carry mixed crystallized 

 pyrites and galena ; in these the gold and silver values are 

 low, yet they are in the heart of the richer ore bodies. 



Class II., of ore bodies, is not largely represented as 

 yet, but it is a very distinct one, and consists of narrow 

 veins dipping at high angles to the horizon. The ore 

 body is mixed quartz and secondary limestone. The ore. 

 itself is galena and a very dark zinc blende, both rich in 

 silver, and almost devoid of gold. This ore is singularly 

 well collected along the walls of the vein, the outside 

 slickensided portions of which consist often of the fine 

 grained galena, called steel galena, the inner portions 

 being a coarser galena and dark blende. Usually in this 

 district the zinc blende is low grade in silver ; here 

 it is not so. i 



This class of veins has not been seen in immediate 

 association with those of Class I. It is more distinctive 

 of the Ten Mile slopes. The country rock is the same to 

 all appearances. 



I Figure 5 represents one of 



these veins, also the inter- 

 ference of the vein by a 

 narrow dyke of a soft, soapy 

 and grey matter, probably a 

 micaceous trap. A very dark 

 horn blen die biotite granite 

 occurs in patches along this 

 dyke also. 

 Class III. Some veins of this class are remarkable for 



