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the anticlines; and in some few cases on the pitching 

 portion of the anticlines. Rarely they are formed in the 

 synclinal troughs. The domes thus determine the location 

 of nearly all the groups of veins and each of them may 

 be considered as an independent gold district. Some domes 

 however, especially in the west, do not show the presence 

 of quartz veins, but this appearance may be simply due 

 to the concealment of the bedrock by drift. 



A tabulation made of the principal anticlines with the 

 gold districts located on them, from the map-sheets 

 published by the Geological Survey, shows that to the 

 east of Halifax 33 gold districts are distributed along 

 14 anticlines in an area 40 miles (65 km.) in width by 

 100 miles (160 km.) in length. 



The gold-bearing districts are much less numerous 

 and generally less productive in the western part of the 

 field than in the east. This is chiefly due to the folding 

 being more gentle and the domes broader, hence the 

 slipping of the beds and fracturing has been less pronounced 

 with the consequent failure to produce channels favourable 

 for the circulation of solutions and the deposition of vein 

 matter. 



Quartz, with hardly an exception, forms by far the largest 

 proportion of the vein filling, but occasionally inclusions 

 of country rock or certain minerals are quite abundant. 

 Associated with the quartz, the principal minerals are 

 pyrite, arsenopyrite, calcite and galena, less frequently 

 chalcopyrite, sphalerite, dolomite, chlorite and pyrrhotite, 

 and more rarely scheelite, stibnite, feldspar, rutile and 

 specular iron. 



Silver is found in the gold recovered from cross-veins 

 at Leipsigate, Brookfield, and some other districts, some- 

 times in such amounts as to reduce the value of the product 

 to $16 an ounce. But the gold produced from the 

 interbedded veins is generally very fine and varies in 

 value from $19 to $20 per ounce. The gold generally 

 occurs free and visible and is amenable to amalgamation, 

 but it is also in part intimately bound up with the sulphides, 

 thus requiring other methods of treatment for its recovery. 

 In the white, coarsely crystalline quartz it is found in 

 coarse, visible particles, while in the bluish, oily quartz of 

 the laminated veins it is usually disseminated more finely 

 or is found in plates in the layers parallel to the walls. 

 It is generally most abundant on the footwall, is very 



