Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52N04SW00033

Record: MDI52N04SW00033

General

Commodities

Primary Commodities: Gold

Secondary Commodities: Silver

Location

Township or Area: Dome

Latitude: 51° 5' 8.11"    Longitude: -93° 47' 24.78"

UTM Zone: 15    Easting: 444653.13   Northing: 5659639.34    UTM Datum: NAD83

Resident Geologist District: Red Lake

NTS Grid: 52N04SW

Point Location Description: Shaft location

Location Method: Data Compilation

Access Description: Access to the property is gained via the McMarmac town site road to the McFinley Mine road. A left turn at a fork in the road immediately past the Shewchuk sandpit accesses the drill road onto the Marboy Peninsula

Exploration History

1928-29: Red Mammoth Gold sunk the No. 1 shaft to a depth of 22.9 m with limited underground development. 1933: Margaret Mines optioned property, deepened shaft to 57.3 m and completed approximately 90 m of underground development. 1936-37: Property optioned to Richmond Development Corp., who carried out trenching and 6058.13 m of surface drilling. No. 2 Shaft was started. 1939: McKenzie Red Lake Gold Mines optioned ground, and then McMarmac Red Lake Gold Mines was incorporated to acquire the property. The No. 2 shaft was deepened to 48.8 m, and limited underground development was carried out. 1941: No. 2 shaft was deepened to 237.0 m and 5 levels were established. A 75 tpd mill was in operation. 1948: Production ceased. Boymar Gold Mines, subsidiary of McMarmac, acquired property. 1950: A 854 exploration crosscut was driven from the 228.75 m level. 1960: Name changed to Marboy Mines. 1966: Drilled 28 holes totalling 4205.65 m. 1976: Nickel Rim Mines Ltd. gained control of the property. 1982: Goldquest Exploration Inc (a division of Dickenson Mines Ltd. acquired the property. 1983: Goldquest carried out line cutting, magnetic and EM surveys, and outcrop mapping. 1984: Goldquest carried out stripping and channel sampling. 1994: Dickenson Mines merged with Goldcorp Inc. 1997: Goldcorp drilled 2 DDH totalling 592 m. 1998: Goldcorp conducted airborne magnetic and EM surveys. 2000: Goldcorp recut the original Marboy Mines grid and carried out an MMI soil survey. 2010: Goldcorp drilled 4 DDH totalling 2057 m. 2011: Goldcorp drilled 8 DDH totalling 1629 m.

Assessment Work on File

Geology

Province: Superior

Subprovince: Uchi

Terrane: North Caribou

Domain: Uchi

Belt: Red Lake

Geological Age: Archean  

Metamorphism Type: Regional

Metamorphism Grade: Greenschist

Geology Comments

Dec 07, 2005 (K R Kettles) - The property is primarily underlain by altered mafic metavolcanic flows. Narrow bands of lean iron formation are associated with the flows. A band of interflow sedimentary rock is present in the sequence NW of the Ore zone, and is composed of greywacke containing considerable pyrite. A dyke of metagabbro extends across the eastern and southern part of the property, and sericitized porphyry dykes cut the carbonate bodies containing the ore. The youngest rocks are lamprophyre dykes. The general strike of rocks and carbonate lenses in the area is NE-SW. The carbonate lenses dip 65 degs to 80 degs SE whereas the interflow sedimentary rocks dip vertically to steeply NW.

Lithology

Lithology Comments

Dec 07, 2005 (K R Kettles) - The mafic metavolcanic flows are composed of both massive and pillowed flows. The band of interflow sedimentary rocks in the mafic metavolcanics are composed of greywacke and contain pyrite.

Nov 30, 2020 (Therese Pettigrew) - The Marboy central basalts are sandwiched between two major ultramafic units including the East Bay Serpentinite and the Richmac ultramafic. The McMarmac mine site occurs between these units (Assessment report 20000014757).

Mineralization

Mineralization Comments

Dec 07, 2005 (K R Kettles) - Gold is found almost exclusively in fine grained quartz contained in large carbonate lenses. The carbonate lenses generally conform with the strike of the country rocks but have a different dip, indicating that they are large transgressive veins. The width of the lenses varies from 6 to 12 m. Near ore zones, the carbonate exhibits conspicuous crinkly banding, with quartz in irregular fragment-like masses or in continuous bands. Gold is restricted to the quartz. Arsenopyrite occurs as fine needles and in massive pods. High gold values are restricted to the fine needle arsenopyrite mineralization. According to the McMarmac Red Lake annual report of 1948, ore reserves in the area of the No. 2 shaft were exhausted in August, 1948, and no known ore remained.

Nov 30, 2020 (Therese Pettigrew) - DDH MB10034 returned up to 4.93 g/t Au over 1.6 m from a quartz-carbonate vein with 2% pyrrhotite (Assessment report 20000014757).

Alteration Comments

Dec 07, 2005 (K R Kettles) - The country rocks have been silicified and carbonatized.

Mineral Record Details

Mineral Zones - Size and Shape

Rank: 1       Structure Type: Vein

Site Visit Information

Date: Feb 02, 1997

Geologist: K R Kettles

Notes: N/A

References

MonoMap - Geology of Dome Township, District of Kenora

Publication Number: R045 Scale:     Date: 1997

Author: Ferguson S.A.

Publisher Name: Ontario Dept. of Mines

Location:

Part - Geology and mineral deposits of the Red Lake area

Publication Number: ARV49-02 Scale:     Date: 1998

Author: Horwood H.C.

Publisher Name: Ontario Dept. of Mines

Location:

Mono - Gold deposits of Ontario, part 1, districts of Algoma, Cochrane, Kenora, Rainy River, and Thunder Bay

Publication Number: MDC013 Scale:     Date: 1971

Author: Ferguson S.A., Groen H.A., Haynes R.

Publisher Name: Ontario Dept. of Mines and Northern Affairs

Location:

Part - Gold deposits in the vicinity of Red Lake

Publication Number: ARV44-06.001 Scale:     Date: 1997

Author: Hurst M.E.

Publisher Name: Ontario Dept. of Mines

Location:

Mono - Gold occurrences, prospects, and deposits of the Red Lake area, volumes 1 and 2

Publication Number: OFR5558 Scale:     Date: 1987

Author: Durocher M.E., Burchell P.S., Andrews A.J.

Publisher Name: Ontario Geological Survey

Location:

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For detailed information regarding this mineral record please contact the Red Lake Resident Geologist District Office