OF CENTRAL CANADA PART V. 303 



and on for some years with fluctuating results, near Garden River, 

 east of the Sault. Other argentiferous galena veins have been recog- 

 nized in the vicinity of Lake Teniiscamingue. 



Copper : The Keweenian formation on Michipicoton Island, Lake 

 Superior, has yielded native copper in disseminated masses and small 

 strings, and somewhat extensive mining operations have been carried 

 on at the north-west of the island, although with not very encourag- 

 ing results. The same formation at Black Bay is traversed by veins 

 containing intermixed copper pyrites and galena, carrying small 

 amounts of gold and silver ; and at Prince's Location, west of Thun- 

 der Bay, both copper pyrites and copper glance occur in the dark 

 Animikie slates which there form the country rock. Yeins contain 

 ing promising amounts of copper pyrites have been discovered also in 

 Neebing and other townships in the Thunder Bay district ; but the 

 most important deposits of copper ore lie in the Huronian rocks of 

 the region now under review. The veins at the Bruce and Wallace 

 mines, Lake Huron, after yielding large supplies of copper (in the 

 form of the yellow and horseflesh ores) for many years, are now 

 thought to be exhausted, and mining operations^ at that immediate 

 locality are abandoned. Some promising veins, however, are now 

 being opened at Echo Lake, a short distance inland. Yast deposits 

 of copper ore, probably in the form of both veins and stocks, occur to 

 the north-east, in the Sudbury district, and these are now beginning 

 to be largely worked. 



Lead and Zinc Ores and Other Economic Minerals of the District : 

 Promising amounts of galena occur in many of the veins which tra- 

 verse the Animikie, Keweenian and Huronian rocks around Thun- 

 der Bay and adjacent country, as in Neebing Township, and at Silver 

 Lake and Black Bay. Also at Garden River, east of the Sault 

 Ste. Marie and elsewhere. In most of these veins the galena is inter- 

 mixed with blende and copper pyrites, and carries more or less silver. 

 Some comparatively broad veins carrying workable quantities of 

 zinc blende have been discovered at Blende Lake and Silver Lake 

 immediately adjacent to Thunder Bay, and also a few miles inland on 

 the line of the Canadian Pacific Railway. Large iron deposits, at 

 present only partially explored, occur at various localities within this 

 region, as in the vicinity of the Pic River, and at Michipicoten, Eagle 

 Like, and elsewhere; but some of these deposits hold a good deal of 



