WALLBEIBGE HEMATITE MINK. 



25 



The position ol' ihe hematite deposit, forming the Wallbiidg-e Mine, is at the summit 

 oi' the lower gneissic series, or immediately at the base oi' the i^pper series. The mine, 

 itself, ocenrs on the twelfth lot of the hfth concession of Madoc, about four miles north of 

 Madoc village. The ore, now exhausted, was in the form of a large " stock " or irregular 

 mass, partly encased in and mixed with green amphibolic rock: l)u( the latter is very 

 simringly present at this locality, and, as shewn by shafts immediately adjacent to the 

 mine, it does not extend many yards beyond the site of the ore. The hematite has been 

 mined by open quarrying, and the large excavation which has thus resulted shows the 

 original mass of ore to have averaged about 1*70 feet in length, by about 100 feet in breadth, 

 with an average depth of eighty feet. The weight of this mass would exceed 200,000 

 Canadian tons. Here and there, as in stock-formed masses generally, the ore has thrown 

 out wedge-shaped prolongations into the surrounding rock ; but these, when followed up, 

 have been foirnd, in every instance, to terminate more or less abruptly at distances of a 

 few feet or yai-ds. The floor of the excavation is now on bare rock, but in order to test the 

 pit thoroughly, the L ssees have sunk upon it a couple of small shafts, seventy-five feet 

 apart, and about thirty feet deep, and these have been connected at the bottom by a narrow 

 drift. The latter passed through barren ground, all the way. 



EXrL.V^-ATION : 



A, A, County koad. B, Side koad. 1. Large excavation' lei-t by removal of ore at the 



Wallbriixib Mine, on i,ot twelve, concession five, Madoc. 2. Engine house. 



3. Shoot. 4. Tramway. 5, 5. Sheds. 6. Shaft op Mili.ek Mine 



on lot twelve, concession sis. 7. Shafi on 



lot thirteen, concession five. 



It was at one time thought that the deposit extended across the country road, in an 

 easterly direction, into the twelfth lot of the sixth concession ; but although there are 

 undov;btedly, indications of a slight extension in this direction, subseqiient explorations 



Sec. IV., 1885. 4. 



