INVENTORY FILE NO.
NAME OF PROPERTY
MAFEKING (2 quarries)
1978 – Genstar Limited (Inland Cement Indusries Limited)
Edmonton, AB T5J 2T1
N. quarry 52°50.00’
S. quarry 52°49.45’
Mottled buff micrite and biomicrite of the Point Wilkins Member of the
Devonian Souris River Formation occur in a large area around Mafeking and
Steeprock Point (former Point Wilkins). At the Mafeking South Quarry, the Point
Wilkins Member is overlain by a thin layer of till and soil and underlain by the
part of the Souris River Formation. Beneath all these units is the First Red
Bed. A Manitoba Mines Branch drill hole in the bottom on the quarry found base
of the lower Souris River Formation 8.22 m beneath the quarry floor.
domal flexures are present in the quarry.
Mottling in the Point Wilkins
Member may be caused by a very fine grained angular to subrounded patches of
limestone in a matrix of slightly coarser limestone. The lower part of the
Souris River Formation is a more argillaceous limestone.
Analyses of the Point Wilkins member ranged from 95.33% CaCO3 with 1.72% MgCO3
to 98.01% CaCO with 0.88% MgCO3. Analyses of the lower Souris River Formation
ranged from 84.42% CaCO3 with 2.36% Mg CO3 to 95.31% CaCO3 with 0.61% MgCO3
(Bannatyne, 1975; p. 92).
Physical Properties: See Parks (1916) for standard
tests for building stone.
Use: Portland cement (must be<5% MgCO3) at
Regina. Some stone has been used by Manitoba Forestry Resources Limited in their
lime kiln at their Manfor Plant, The Pas.
MINERALS OR PRODUCTS OF VALUE
EXPLORATION AND DEVELOPMENT
High-calcium limestone for Portland Cement was quarried approximately
16 km north of Mafeking. The former quarries are is beside Highway 10 and the CN
The four legal subdivisions described below seem to have provided
most of the production from the quarries.
1912: Kindle (1912, p. 258)
first pointed out potential for cement here.
1955: L.S. 2, Sec. 32 staked as
Quarry Permit W-187 by D.P. Thompson; L.S. 3, Sec. 3, Sec. 32 staked as Q.P.
W-188 by P.W. Dawson; L.S. 6, Sec. 32 staked as Q.P. W-189 by M. Magnusson. L.S.
7, Sec. 32 staked as Q.P. W-190 by R. Magnsson. L.S. 14, Sec. 29 staked as Q.P.
W-199 by M. Bellefeuille.
1955: All assigned to Saskatchewan Cement
1956: (pre) Inland Cement Company Limited found up to 20.4 m
of high-calcium limestone in exploratory drilling.
1956: Production began in
Sec. 29 in September. Bannatyne (1975, p. 14) reports that early production, at
181 000 tonnes per year, included some argillaceous limestone below the Point
Wilkins unit. Higher freight rates made the shipping of this material too
costly, so that only Point Wilkins limestone was produced, in later
1957: Q.P. W-187 to 190, 199 converted to Quarry Leases M-259-262,
1957: Assigned to Saskatchewan Cement Company Limited, a subdivision of
Inland Cement Company Limited.
1959: Leases assigned to Inland Cement Company
Limited, however, Saskatchewan Cement Company continued paying the limestone
royalties until 1961.
1965: Assigned to Sogemines Limited.
Production averaged 363 000 tonnes annually, with the quarry usually operating
from May through November.
Quarrying took place on two levels. A bench was
established 14-17 m below the highest point on the east wall. The rock was
broken by filling blast drill holes with Amex powder. A jaw crusher reduced the
stone to -17.8 cm.
In 1971 maximum length of the quarry was 671 m (SE-NW) and
maximum width was 335 m. It was 28 m deep.
1974: (by) Quarrying had
progressed north and northwest into Sec. 32. Production was continuous
throughout the year, and continued to 1976 when the quarry was
1976-1977: A new quarry located on M-262 in L.S. 7, Sec. 32, was
opened in late 1976 or early 1977. The beds in this quarry are mainly
flat-lying, and the uppermost unit of the Point Wilkins Member is exposed at the
top of the quarry. Entrance to the North Quarry is 0.6 km north of the entrance
road from Hwy. 10 to the old quarry. The quarry was 11 m deep by August, 1977.
In places 1 m to 2 m of dolomite overlies the high-calcium limestone. The stone
was trucked to the crushing plant south of the quarry.
1978: Assigned to
1978: Converted to Quarry Mineral Leases.
1951: Devonian Geology of Lake Manitoba-Lake
Winnipegosis Area; Manitoba Mines Branch, 49.-2, p. 50.
1975: High-Calcium Limestone Deposits of Manitoba; Publication 75-1,
1944: Limestones of Canada; their occurrence
and characteristics, Pt. V: Western Canada; Mines Branch, Ottawa, Report 811, p.
1914: The Silurian and Devonian Section of Western
Manitoba; Geological Survey of Canada, Summary Report 1912, p. 257-8.
1916: Report on Building and Ornamental Stones of Canada, Vol. 4; Mines
Branch, Ottawa, Report 388, p. 131-5.
1956: Production began near Mafeking in
September at the rate of approximately 181 000 tonnes per year. Limestone was
sent by rail to Regina.
1971: (by) Production averaged 363 000 tonnes per
year, but then since decreased.
1977: A new quarry in L.S. 7 of Sec. 32, Twp.
44, Rge. 25W were in operation, and by August was 11 m deep.
Point: Mafeking Quarry - distance from Mine 442 km.
Material Shipped: -
Crushed rock; Carried by Rail
*63C/14, Barrow (topo.), 1:50 000; Surveys and Mapping Branch,
Map 637A, Mafeking (Geol.), 1:253 440; Geological Survey of
Fig. 13: Dawson Bay and Souris River Formations (Geol.), 1:500 000,
accompanied Publication by Bannatyne (1975); Man. MRD.
Fig. 13A: Detailed
Map, Mafeking Quarry-Steeprock Point Area (Drill & Geol.), 1:100 000,
accompanied publication by Bannatyne (1975); Man. MRD.
Map 12: Industrial
Mineral producers (Index), 1:1 000 000; Manitoba Mines Branch.
Kindle, Parks, Bannatyne and others describe the extensive Point
Wilkins Member and its relationship to overlying and underlying strata. This
card describes the quarry but does not attempt to describe the entire Point
Wilkins Unit. The chemical analyses given on this card for the Point Wilkins
Member were taken from drill core of a hole drilled by Manitoba Mines Branch
approximate 3.2 km south of the quarry. B. Bannatyne correlated the hole with
quarry units (see Bannatyne, 1975, p. 92). Analyses for the lower Souris River
Formation came from a hole drilled in the quarry floor.
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