1899] Mineral Resources of the Ottawa District. 35 



system, while by others they are regarded as belonging to a 

 higher division, the evidence in favour of the latter view being 

 that generally accepted at the present time. The occurrence of 

 gold in certain portions of these rocks was ascertained as early 

 as 1865-66 in the neighbourhood of Marmora, and several mines 

 were shortly after opened in that locality which gave great 

 promise of good returns. Since that date this industry has been 

 pursued with varying success, and with gradually improved 

 methods of treatment this area will yet probably give satisfactory 

 results. As a rule the gold of this formation is associated with 

 various sulphurets which renders its separation from the quartz 

 a somewhat difficult matter, and expensive methods are neces- 

 sary for its profitable extraction. The difference between this 

 ore and the free milling gold quartz lies chiefly in the fact, that 

 in the latter the gold readily separates from the gangue after 

 crushing and amalgamates easily with mercury, while in the 

 arsenical ores, like those of the Marmora district, as also in 

 some of those from Nova Scotia, the separation has to be secured 

 by expensive chemical treatment. 



No definite returns are to hand as to the actual output of 

 the gold mines in this district, but it has varied greatly at 

 different times. Assays from several mines in the Madoc and 

 Marmora district have shown a very high percentage of the 

 precious metal. Lately the gold bearing rocks have been recog- 

 nized at different points nearer the Ottawa, and assays from 

 some of these localities have given very satisfactory returns. 

 Unfortunately however in many cases the veins of quartz are 

 small and irregular, and there appears to be a good deal of un- 

 certainty as to whether these can be properly manipulated. 

 Small quantities of gold can be obtained by assay from many of 

 the veins which traverse the rocks of this formation. 



In the Report of the Geological Survey for 1878-79, an 

 analysis is given of a sample of bluish-grey quartz, traversed by 

 small veins of a light green apatite, which is reported as coming 

 from the Peche Village, township of Wakefield. The results of 

 this assay surpass anything yet found in the rocks of the Ottawa 



