Matachewan Consolidated

Location: Powell Township
Years of Operation: 1934 – 1954, 1980 -1982
Tons Milled: 3,631,908
Ounces of Gold Produced: 385,503







Matachewan Consolidated Mine (Past Producer)



Approximately  V/2  miles  west-northwest of  Matachewan,  Y*  mile  south  of  Otisse  Lake,  in southeastern  Powell  Township.  Shafts  Nos.  1,  2, and  3  in  claim  MR5830.  Latitude 47.950,  Longi tude 80.680 . Map  reference:  ODM  2110,  Powell  and  Cairo Townships.


The  orebodies  are  close  to  a  contact  between  a  belt of tightly  folded  Timiskaming  meta sediments  that  strike  east  and  dip  steeply  south, and  Keewatin  metavolcanics  (andesite,  basalt, tuff,  and  agglomerate).  These  rocks  are  intruded by dikes and cupolas of Algoman syenite porphyry. All  rocks  are  cut  by  north-trending  Matachewan diabase  dikes.  Cobalt  Group  sedimentary  rocks mantle  the  older  formations  Va  mile  south  of the shaft.


The  orebodies were of two types: 1) Those within  metavolcanics were irregular and had limited  vertical  extent.  They  consisted  of  a  series of  gently  dipping  quartz  stringers  and  adjacent lavas  and/or  tuffs  that  were  fractured,  bleached, and mineralized with pyrite and gold. With an aver age gold content of 0.16 ounce of Au per ton, they were of higher grade than the second type and were the  main  source  of ore  during  the first  5 years of production. 2) Those within the porphyry masses occurred mainly in the western part of the property and were similar to the orebodies at the Young-Davidson Mine. Most of the porphyry  is fractured to some extent and the fractures  are  filled  with  quartz  and  gold-bearing pyrite.  In  some zones, this fracturing  is sufficiently intense  and  the  gold  content  sufficiently  high  to make ore.


Leased  by  Matachewan  Consolidated Mines Limited.


1917: Gold discovered by Sam Otisse.
1918-1919:  Vertical  two-compartment  No.1  Shaft to  170 feet with 800 feet of lateral development on the  160-foot  level.  No.2 Shaft, inclined 70″, to 33 feet. Work by Matachewan Gold Mines Limited.
1923-1924:  Three  properties  merged to form Mat achewan  Canadian  Gold  Mines  Limited.  Diamond- drilling,  totalling  5,455  feet,  by  The  Porcupine Goldfields  Development  and  Finance  Company Limited.
1933-1954:  Underground  workings  dewatered, three-compartment  vertical  No.3  Shaft  to  2,432 feet,  60,663 feet of underground development and extensive  underground  diamond-drilling  and  sam pling.  Continuous  production from  1934 to  1952 when mine was put on  a  salvage basis. All work by Matachewan Consolidated Mines Limited.
1969-1970:  Diamond-drilling  (amount  unknown) by Matachewan Consolidated Mines Limited.

Year Gold Silver Ore Milled Recovered Grade
 (ounces) (ounces)  (tons) (ounce of Au per ton)
1934-1954 370,427 133,710 3,525,200  0.11


CIMM  1948,  Structural  Geology  of Canadian Ore Deposits, Vol.1, p.638-640.
ODM 1935, Vol.44, pt.2, p.36-42.
ODM1967, GR51,p.32-36.
Resident  Geologist’s  Files,  Ontario Ministry of Na tural Resources, Kirkland Lake.

Gordon, J.B., Lovell, H.L., de Grijs, Jan, and Davie, R.F.
1979:  Gold  Deposits of Ontario,  Part  2:  Part of District of Cochrane,  Districts of Muskoka,  Nipissing,  Parry  Sound,  Sudbury,  Timiskaming,  and  Counties  of Southern  Ontario;  Ontario  Geological  Survey,  Mineral  Deposits  Circular  18,  253p.

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