MINERAL
INVENTORY FILE NO.
479
______________________________________________________________________________________________________
PRODUCT
COPPER
NTS AREA
63J13NE
REF.
CU 1
______________________________________________________________________________________________________
NAME OF PROPERTY
OSBORNE LAKE MINES
OWNER OF
OPERATOR ADDRESS
1991 Hudson Bay Mining and Smelting Co., Limited
Flin Flon, MB R8A
1N9
OBJECT LOCATED
Shaft
MINING
DIVISION
The Pas
Latitude
54°54'43
Longitude
099°43'40
Uncertainty
(m)
100 m
UTM Zone
14U
Easting
453400
Northing
609600
L.S./Quarter
Section
9
Section
7
Township
69
Range
15 WPM
DESCRIPTION OF
DEPOSIT
Massive and disseminated sulphides occur in a tabular orebody in
Precambrian Kisseynew-type quartz-biotite gneiss, which strikes N45°E and dips
65°NW, along the Berry Creek fault, on the eastern flank of a syncline. The
orebody is 274 m (900 ft) long and averages 6 m (20 ft) in width. Along its
plunge of 30°SE, it is 1097 m (3600 ft) long. The coarse-grained ore contains
pyrite, pyrrhotite, arsenopyrite, chalcopyrite, sphalerite, with minor bornite,
cobaltite, galena, titanite, marcasite, and garnet. An older, less prevalent
phase consists of fine-grained pyrite and arsenopyrite. Gold and silver were
found in assays.
Both the ore and wallrock are intruded by coarse-grained,
sheared pegmatite.
This deposit is listed in a table of volcanic-hosted ore
deposits (Walford and Franklin, 1982, p. 484).
ASSOCIATED
MINERALS OR PRODUCTS OF VALUE
Zinc, gold, silver
HISTORY OF
EXPLORATION AND DEVELOPMENT
The deposit is located 1.2 km north-northwest of the north end of
Osborne Lake. The C.N. railway spur from Stall Lake and Provincial Road 393, end
at the mine.
The Lakeside, Lakeview, and Great Bear Groups were staked here,
during the late 1920's. According to Russell (1957), a mineralized Cu-Zn zone at
Osborne Lake was staked in 1914 (unconfirmed). At least 122 m (400 ft) of
trenching was done. Assays of up to $8.90 for Cu, with minor Au and Ag were
reported (Manitoba Miner, March 15, 1928). The discoveries were made by Mr.
Stewart and J.H. MacKay (Northern Mail, March 14, 1929). Two mining engineers,
Bull and Crago, reported favorably on the deposit consisting of 14 claims and 1
fractional claim. The Lakeside Group of 11 claims were transferred from Edgar
Stewart, to a syndicate represented by Jack Bull (Manitoba Mines Branch b).
Canam Metals Limited optioned, and then purchased the claims in 1929, through
their representative, J. Ellis. Diamond drilling commenced in June 192, but the
results of this work is not known.
Pine Lake 1 and 2 (P7136, and P7137) were
staked by R.W. Bryerton in 1944. Surface work was probably done in 1945, and the
claims were cancelled the following year.
G.D. Tribble staked T.K. 1, 2, 7,
and 8 (P 19207, 8, 13, and 14) in 1948. A magnetometer survey found several
anomalies. Three holes totalling 48 m (157 ft) were diamond drilled on T.K. 1,
9, and 15 for Wekusko Consolidated Limited (Non-confidential Assessment File No.
90081). A 19.8 m (65-ft) hole on T.K. 1 intersected a section, which assayed
0.06% Cu, 4.07% Zn, 5.49 grams/tonne (g/t) (0.16 oz/ton) Ag, and trace Au. A
grab sample from an old trench yielded 2.22% Cu. A selected sample from an
outcrop assayed 0.51% Cu, and 2.20% Zn (Non-confidential Assessment File No.
90081). T.K. 2 and 8 were cancelled in 1949, and T.K. 1 and 7 were also
cancelled the following year.
01, 03 and 05 (P22352, P22354, and P22356) were
staked, in 1950, by Mike Remniak, P. Kobar, and W.B. Kobar, respectively. In
1951, Remniak assigned his claim to Pete Kobar, Kobar also staked Pine 16
(P23584) that year. One 10.7-m (35 ft) hole was diamond drilled on each of the 0
claims in 1951. Hudson Bay Exploration and Development Company Limited (HBED)
optioned the property in 1952. A ground electromagnetic survey was completed and
diamond drilling began. By the end of 1953, HBED had drilled 1568 m (5143 ft) on
01 and 1594 m (5230 ft) on 03. In 1954, HBED. exercised its option and purchased
the claims.
According to the 1954 Annual Report of HBED’s parent company,
Hudson Bay Mining and Smelting Co. Limited (HBMS), drilling and geophysics
outlined 300 000 t (330 000 tons) averaging 3.97% Cu and 1.7% Zn. In 1955,
reserve estimates were raised to 402 000 t (443 000 tons) grading 4.01% Cu and
1.7% Zn. Exploration diamond drilling amounted to 4656 m (15 276 ft) throughout
the Osborne Lake property that year (HBMS, 1955 Annual Report). Leases M3759-61
and 3792 were issued for 01, 3, and 5, and Pine 16, in 1955. The following year
all the claims were assigned to HBMS.
An airborne electromagnetic survey was
done by Canadian Nickel Company Limited, under Airborne Permit No. 19, in 1957
(Non-confidential Assessment File No. 91624).
In 1961, surface leases M-100,
M-111, and M-136 were issued for 03, 05, and Pine 16. The road and power
transmission line was completed to the mine site. A three compartment service
shaft on 03 was collared and sunk 15.8 m (52 ft). The sinking of this shaft
ended in 1965, at a final depth of 679 m (2229 ft). Twelve levels, roughly 46 m
(150 ft) apart, were established. The highest level is 76 m (250 ft) below
surface, and the deepest is at 640 m (2100 ft). A short drift was driven on the
533 m (1750 ft) level, in 1963. Exploration diamond drilling totalled 271 m (889
ft) in 1963, 1973 m (6473 ft) in 1964, and 5728 m (18 793 ft) in 1965. In 1964,
594 m (1950 ft) of drifting was done on the 183 (198?) m, 305 m, and 579 m (600
(650?) ft, 1000 ft, and 1900 ft) levels. Between 122 m and 244 m (400 and 800
ft), 363 000 t (400 000 tons) of blocked ore grading 4% Cu and 2% Zn was
reported (Northern Miner, September 10, 1964). Proven reserves of 2 .2 million
tonnes (2.5 million tons) to the 610 m (2000 ft) level, but open at depth were
reported to average 4.5% Cu and 1.6% Zn (Northern Miner, May 13, 1965).
The
three compartment production shaft was collared on 05, in 1965, and sunk to 72.5
m (238 ft) that year. It was completed to 732 m (2402 ft), by the end of 1966 In
1996, proven reserves totalled 2.3 million tonnes (2.5 million tons) grading
over 4% Cu and 1.4% Zn (The Northern Miner, October 3, 1966).
The C.N.
railway from Stall Lake to Osborne Lake was completed in 1967. during 1967 and
1968 exploration diamond drilling totalled 9057 m (29 714 ft) and development
work continued.
As of January 1, 1968, proven reserves were 2 467 150 t (2
718 800 tons) grading 4.17% Cu and 1.4% Zn (World Mining). The Osborne Lake mine
was brought into production on July 2, 1968, using ore from underground and from
the development stockpile. The production rate was approximately 726 t/day (800
tons/day). During 1968, exploration drilling outlined an additional 67 000 t (74
000 tons) of ore grading 6.2% Cu and 1.4% Zn (HBMS, 1968 Annual Report). See
History of Production for yearly production figures. By 1970, the mine was
producing at 1089 t (1200 tons) per working day (Hawkins & Martin,
1970).
In 1971, drifting was done on the 640 m (2100-ft) level. Drilling
found the orebody to extend at least 91 m (300 ft) below that level. Production
halted in March of 1973, in order to develop the deeper zone below 640 m. The
production, or #2 shaft, was sunk another 168 m (550 ft) and two new levels at
701 m, and 823 m (2300 ft and 2700 ft), were started. The #1 (service) and #2
(production) shafts were connected on the 533 and 640 m (1750 and 2100 ft
levels).
As of January 1974, reserves at the Osborne Lake mine were 1 747 000
t
(1 925 200 tons) grading 3.64% Cu and 1.5% Zn (Cranstone and Hamilton,
1976). During 1974, a total of 197 000 t (217 000 tons) were added to the
reserves in the ore zone below the 640 m level (HBMS, 1974 Annual Report).
Underground diamond drilling totalled 1227 m (4027 ft) that year. Stopes were
developed in 1975.
Diamond drilling from the 838 m (2750 ft) level confirmed
a limited tonnage of ore below the bottom level (HBMS Annual Report 1978).
Further drilling, in 1979, failed to prove up additional ore and a start was
made on development of the lower ore zone (HBMS, Annual Report 1979).
The
following measured and indicated reserves were
reported:
.......................................................Average
Grade
Year........Tonnage............................Au.......................Ag.................%
Cu.......% Zn...... % Pb
...............tonnes (tons)...............g/tonne
(oz/ton).....g/tonne (oz/ton)
1978........1 049 000 (1 156 000)......0.10
(0.003)..........2.74 (0.08)..........3.27.........1.30
1979*.......1 074 860
(1 184 500)......0.10 (0.003)..........3.43
(0.10)..........3.02.........1.20
1980...........920 145 (1 014
000)......0.14 (0.004)..........3.77
(0.11)..........2.90.........1.30
1981*........832 700 (...917
600).......0.14 (0.004)..........3.77
(0.11)..........2.74.........1.30
1983..........603 442 (...664
993)......0.10 (0.003)..........3.77
(0.11)..........2.47.........1.23.......0.185
*Proven reserves
Source:
Cranstone and Whillans (1978); Whillans and Cranstone (1979); and Laughlin
(1980, 1981, and 1983).
The mine ceased production temporarily in the
fall of 1983, and permanently closed in 1984 (HBMS, Annual Report 1984).
As
of December 31, 1984, the mine was reported to contain ore reserves of 528054 t
grading 2.45% Cu and 1.28% Zn (Esposito, 1986, p. 12). Total production and
reserves were reported as 3 380 000 t grading 3.03% Cu and 1.48% Zn (Bamburak,
1990, p. 7).
A bedrock-sampling program was done by Eccles and Fedikow (1985)
and an industrial minerals study was done by Gunter and Yamada (1985). It was
noted that the mine dump was a potential source for garnets.
In 1993, MMR, in
joint venture with HBED, conducted a drilling program on the Bur zone near the
mine site, some encouraging results were encountered in these shallow drill
holes (Northern Miner, March 28, 1993)
As of 2002, no further work has been
done on this deposit.
HISTORY OF
PRODUCTION
...............................................................Average
Assays
...............................Tonnes.(tons)...................Au.......................Ag....................Cu....................Zn
Year...........................Produced...............g/tonne.oz/ton).............%.....................%....................%
1968....................160
980..(177 400).............-.......3.43 (0.1)...........-
......................4.6...................1.6
1969....................341
300..(376
100).............-.........-......................-.......................4.3...................1.5
1970.......................289
800.. (319
400).........-.........-......................-.......................4.0...................1.6
1971.......................139
655..(153
900)..........-.........-......................-.......................3.5...................1.2
1972.......................206
350..(227
400)..........-.......3.43................(0.1)..3.4.............1.8
1973........................54
265..( 59 800)..........0.34...(0.01)...............6.86
(0.2)..........3.2.................2.4
1974.......................119 510
(131 700)........0.34...(0.01)................6.86
(0.2)..........2.8................1.6
1975.......................173 766 (191
490)........0.69...(0.02)................6.86
(0.2)..........2.8.................1.8
1976.......................175 804
(193 736)........0.69...(0.02)................6.86
(0.2)..........3.1.................1.9
1977.......................218 424
(240 703)........0.86...(0.025)..............7.19
(0.21)........2.49..............2.00
1978.......................224 584 (247
492)........0.75...(0.022)..............7.19
(0.21)........2.53..............1.65
1979.......................171 449 (188
937)........0.21...(0.006)..............4.46
(0.13).........2.40.............1.18
...............................(HBM&S.,
Limited, Annual Reports 1968-1980)
1980.......................165 323 (182
186).......0.21...(0.006)................4.46 (0.13).........2.42............
0.01
(CMH 1980-81)
Shipping point: Osborne Lake Mine Carrier: C.N.
Railway
Material Shipped: Ore Destination: Flin Flon
Capacity: 590
tonnes/day (Bamburak, 1990).
Total production in 1968-1983 was 2 852 007
tonnes grading 3.14% Cu and 1.52% Zn (Esposito, 1986).
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high-grade
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Gale, G.H., Baldwin, D.A. and Koo, J. 1980: A geological evaluation
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Gunter, W.R. and Yamada, P.H.
1985: Evaluation of industrial mineral occurrences in the Snow Lake area; in
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geology and aggregate resources of the Snow Lake area; in
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Sangameshwar, S.R.
1968: Trace element and ore mineralogy of the Osborne Lake mine, Manitoba;
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Sangster, D.F.
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MAP REFERENCES
#Map 63J/13, Herb Lake, (Topographic), Scale 1:50 000, Surveys and
Mapping Branch, Ottawa.
Map 2566G, Herb Lake, (Aeromagnetic), Scale 1:63 360,
Province of Manitoba and Geological Survey of Canada (1965).
Map 7132G, Herb
Lake, (Aeromagnetic), Scale 1:250 000, Province of Manitoba and Geological
Survey of Canada (1965).
Map 25019G (Airborne electromagnetic and AFMAG),
Scale 1:50 000, Geological Survey of Canada (1970).
Map 36063G, Wekusko Lake,
(Airborne gamma ray spectrometry), Scale 1:250 000, Province of Manitoba,
Geological Survey of Canada (1979).
Maps, Snow Lake area, (Airborne
geophysical surveys: airborne gamma ray spectrometry, VLF electromagnetic and
Total Field magnetic), Scales 1:250 000, colour maps, 1:150 000, stacked
profiles; GSC Open File 2300, Geological Survey of Canada (1990).
Maps C
21507G, C 41507G, Herb Lake, (Aeromagnetic Total Field and Vertical Gradient,
colour compilation maps), Scale 1:50 000, Manitoba Energy and Mines and
Geological Survey of Canada (1990).
Maps 63J/13 g,h, (Aeromagnetic Vertical
Gradient/Total Field and VLF EM surveys), Scale 1:20 000; GSC Open File 2219,
Geological Survey of Canada (1990).
Map NN-14-GR (BA), The Pas, Manitoba and
Saskatchewan, (Gravity-Bouger anomalies), Scale 1:1 000 000, Geological Survey
of Canada (1991).
Map 1801, Reed and Wekusko Lakes region, (Geology), Scale
1:126 720 - Accompanying Memoir by Alcock (1920), Geological Survey of
Canada.
Map 268A, The Pas sheet, Manitoba and Saskatchewan (Geology), Scale
1:506 880 - Accompanying Marginal Notes by Wright (1934), Geological Survey of
Canada.
Preliminary Map 48-22, Crowduck Bay, (Geology), Scale 1:31 680, by
M.J. Frarey, 1946-1947; - Accompanying Descriptive Notes by Frarey (1948),
Geological Survey of Canada.
Map 987A, Crowduck Bay, (Geology), Scale 1:63
360, by M.J. Frarey, 1946-1948; - Accompanying Descriptive Notes by Frarey
(1950), Geological Survey of Canada.
Map 1164A, Carrot River,
Manitoba-Saskatchewan, (Geology), Scale 1:1 000 000, compiled by A.H. Lang,
1961; Geological Survey of Canada (1965).
Figure 22, File - Snow - Wekusko
Lakes area, (Geology), Scale 1:225 280 - Accompanying Publication by Davies et
al. (1962), Manitoba Mines Branch.
Map, Snow Lake - Flin Flon - Sherridon
area, (Geological compilation), Scale 1:253 440, by A.H. Bailes, 1970; -
Accompanying Paper by Bailes (1971), Manitoba Mines Branch.
Map, Snow Lake -
Flin Flon - Sherridon area, (Geological colour compilation map showing copper
and zinc deposits), Scale 1:349 570, reproduced from map compiled by A.H.
Bailes, 1970; - Accompanying Field Trip Guidebook by Coats et al. (1972),
International Geological Congress.
Figure 2, Snow Lake area, Manitoba,
(Geology), Scale 1:50 000, compiled by E. Froese and J.M. Moore, 1970-1972; -
Accompanying Paper by Froese and Moore (1980), Geological Survey of
Canada.
Map, Snow Lake area, Manitoba, (Geology), Scale 1:50 000, compiled by
E. Froese and J.M. Moore, 1970-1972; GSC Open File 609, Geological Survey of
Canada (1979).
Map 1423A, Wekusko Lake, (Geology), Scale 1:250 000, by J.E.
Armstrong, 1939, M.J. Frarey, 1946-1948, G.A. Russell, 1954-1955, C.K. Bell,
1962-1963, compiled by W.L. Davison; - Accompanying Memoir by Bell (1978),
Geological Survey of Canada.
Map No. 2, 7, Snow Lake and adjoining areas,
(Photo-interpretation map showing lithological/structural trends and other
lineaments), Scale 1:100 000, 1:228 570 - Accompanying Thesis by Misra
(1983).
Map 4-1979, Wekusko Lake, Manitoba, (Surficial geology), Scale 1:250
000, by R.W. Klassen and J.A. Netterville, 1971-1973; Geological Survey of
Canada (1980).
Preliminary Map 1988 SL-1, Herb Lake, (Surficial geology and
aggregate resources), Scale 1:50 000, by M. Mihychuk, Manitoba Mineral Resources
Division.
Claim Map Series, 63J/13NE, Scale 1:31\680, circa 1976, Mining
Recording, Manitoba Mines Branch.
URL
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REMARKS
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NOTES
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Compiled/Revised
by:
SMH JDB HW HRW AGJ PA JJJ
Date
04-72 02-73 06-73 07-76 06-77 01-82 04-85 02-87 08-91 06-02
