354 THE ORE DEl'OSITS OF 



northern part they are, when observed, inclined to the N. N. E. 

 or N. This pitching of the axes may have been caused either 

 by their being broken across the strike or by transverse east 

 and west upheavals. The lines of movement run in certain 

 definite directions and principally along lines of shearing 

 and thrust planes. The}^ may be grouped into two systems at 

 least:— (1) Those running N. N. E. and S. S. W., and (2) those 

 trending E. S. E. and W. N. W. or E. and W. and approximately 

 at right angles to the first system. In a general way it may 

 be said that the vertical lines of shearing or cleavage-foliation 

 run parallel to the strike and the thrust planes coincide with 

 the stratification-foliation planes of the schists. 



To still more complicate the structure of this complicated 

 belt of country, cross undulations and contortions have been 

 developed on the flanks of the main folds which cause great 

 irregularities in the lines of outcrop. 



These movements appear to have developed considerable 

 volcanic activity and the schists were cut by dikes of felsite 

 and diorite which in places seem to have some genetic association 

 with the ore deposits. 



THE PRINCIPAL ORE DEPOSITS. 



Grandin brook copper deposit. — The ore deposit in which 

 development \vork is in the most advanced stage, is that of 

 Grandin brook, which is situated on tlie edge of the plateau 

 near the junction of the McLeod and Grandin brooks. The 

 work consists of a slope at its most southerly outcrop, several 

 lateral openings made at intervals for about 900 feet along the 

 right bank of the Grandin brook ravine and the stripping of 

 the vegetation and debris from the precipitous clifl's in which it 

 outcrops in the McLeod brook gorge. It consists of several 

 beds, aggregating probably not less than 250 feet in thickness, 

 of serecite and chloritic schists impregerated with copper pyrites. 

 These beds are locally known as the " copper schists," and rest 

 on the schists which outcrop in the McLeod brook and which 



