99 



The table contains a few minerals that have been found 

 in only one or two veins and cannot be considered char- 

 acteristic. Millerite, for instance, is of rare occurrence, 

 and emplectite has been found only in the Floyd mine, near 

 Sharp lake, in the western part of the Cobalt area. Bornite, 

 chalcopyrite, zinc blende, galena and pyrite are not char- 

 acteristic of most of the ore, these minerals occurring more 

 frequently in the wall rock or in non-silver bearing ore of 

 the Keewatin, but one or two mines have produced copper 

 with cobalt-silver ore. Apatite in recognizable crystals has 

 been found in the ore of only one mine. Mercury appears 

 to occur in the ore of all the mines that contain high values 

 in silver, but whether it occurs only as amalgam or in other 

 forms has not been determined. Among the veinstones, 

 aragonite is found but rarely, at least in easily recognizable 

 form, while barite and fluorite have not been observed in 

 the veins at Cobalt proper. 



A question mark has been placed after the names of 

 several minerals in the table which have been reported to 

 occur in the veins but the identification of which has not 

 been made complete by chemical analyses or crystallographic 

 measurements. 



Gold in small quantity has been found in a number of 

 veins, especially in those in which cobaltite or mispickel are 

 characteristic minerals. 



A characteristic of the group is the subordinate part 

 which sulphur plays in comparison with arsenic. Antimony, 

 which is not abundant, is found in some compounds where 

 one would expect to find arsenic, since the latter is so much 

 more abundant. For instance, while both native silver and 

 arsenides occur in abundance, the compounds of arsenic and 

 silver are found only in small quantity. Then one would 

 also expect to find more compounds of bismuth since this 

 metal occurs in the free state in considerable quantities in 

 some parts of the deposits. It might also be expected that 

 native arsenic would occur at times. 



Nearly all the chemical groups of minerals found in the 

 celebrated Joachimsthal deposits of Bohemia are present in 

 the Temiskaminq- ores. The most important exception is 

 uraninite or pitchblende, which came into prominence a few 

 years ago on account of its being the chief source of the 

 element radium. 



