Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52K13NW00017

Record: MDI52K13NW00017

General

Commodities

Primary Commodities: Gold

Location

Township or Area: Baird

Latitude: 50° 58' 6.46"    Longitude: -93° 55' 17.6"

UTM Zone: 15    Easting: 435291.59   Northing: 5646722.02    UTM Datum: NAD83

Resident Geologist District: Red Lake

NTS Grid: 52N04NW

Point Location Description: Zone projected vertically to surface lies in SE portion of KRL 12527

Location Method: Data Compilation

Access Description: Access from Madsen workings 22 to 25 levels.

Exploration History

1935: Madsen Red Lake Gold Mines was incorporated. 1936: Austin Mcveigh discovered mineralized shear zone on claim 12523, and diamond drilling was performed. 1937: Three compartment shaft sunk to 163.175 m with levels at 61 m, 106.75 m, and 152.5 m. 1938: Mill capacity was increased to 400 tpd and shaft deepened to 259.25 m. 1948: mill rate increased to 800 tpd. 1962: total development included 43475.31 m of drifting, 7756.76 m of crosscutting, 17646.39 m of raising, and 434184.0 m of drilling. 1971: 25,960 T @ 0.459 OPT AU recovered from #8 Zone. 1974: Property sold to Bulora Corp. 1976: underground operations ceased. 1980: Property and mine sold to Eugene R. Rowland, and optioned to Noranda Explorations. 1982: surface diamond drilling performed. Madsen Gold corp. reopened the mine and began production in June 1997. Madsen Gold Corp. was taken over by Claude Resources Ltd. in April 1998; production was suspended in October 1999. 2001: Placer optioned the property and completed two phases of surface diamond drilling. Jan-Mar: Up-dip Zone 8 drilled (3,431 m), October: 11 holes (9,339 m). 2002-2004: Placer drilled 17 holes totaling 10,640.6 metres. Placer drilled 49 holes totaling 29,049 metres, geophysics and datamine modeling. Phase 3 drilling on the Treasure Box tarqet, completed fourteen diamond drill holes totaling 5,315 metres. 2006: Claude Resources reacquired the Madsen property in September. 2008: Claude completed 47,210 metres of drilling in 102 surface holes and continued to dewater the shaft past the 10th level. Started underground drilling from 10th Level. 2009: Claude drills 5 consecutive holes in Zone 8. Claude continues to dewater the shaft. 2010-13: Claude completed 69 DDH totalling 47,816 m in the Madsen Mine area. 22 DDH totalling 23,489 m were drilled from underground platforms on level 16 to test downplunge extensions of Zone 8. The remaining 47 DDH were drilled from surface. 2013: Claude sold the Madsen project to Laurentian Goldfields Ltd. in December. 2014: Laurentian changed its name to Pure Gold Mining Inc. in June.

Assessment Work on File

Geology

Province: Superior

Subprovince: Uchi

Terrane: North Caribou

Domain: Uchi

Belt: Red Lake

Geological Age: Archean  

Metamorphism Grade: Amphibolite

Geology Comments

Dec 07, 2005 (K R Kettles) - The rocks in the area of Madsen Mines can be grouped into two sequences: a lower tholeiitic to komatiitic sequence and an upper calc-alkalic sequence. The tholeiitic-komatiitic sequence contains two parts as well: a lower part composed of tholeiitic pillowed basalt, which contains the Austin Shear Zone, the host for the gold deposits; and an upper part of tholeiitic-komatiitic felsic to intermediate volcanics with minor interspersed mafic volcanics. Gabbro sills and dikes are present throughout the tholeiitic-komatiitic sequence. The calc-alkalic sequence is composed of rhyolitic flows, tuffs, and breccias. The rocks vary in strike across the area. Near the Madsen Mine the strike of the rocks is 030 deg and the dip is 65 deg to the southeast. One kilometre NE of Madsen the strike is 45 deg dipping 70 deg southeast. Foliation generally strikes 45 to 60 deg and dips 70 deg southeast. The rocks are metamorphosed to amphibolite facies, and the ultramafic rocks are altered to talc-chlorite schist.

Lithology

Lithology Comments

Dec 07, 2005 (K R Kettles) - The host rocks for the Madsen gold deposits are altered and sheared tholeiitic to komatiitic pillowed basalt. These rocks contain the Austin Shear zone which hosts the gold deposits in the area. They are overlain by tholeiiticfelsic to intermediate volcanic rocks previously thought to be part of the upper calc-alkalic sequence. The tholeiitic -komatiitic mafic volcanics are cut by gabbro sills and dikes. In the vicinity of the Madsen mine, the metavolcanics have been depleted in Na2O, MgO, and CaO and enriched in SiO2, K2O, Sb, Li, B, Ba, Ag, S, Zn, Cu, Hg, and Au.

Mineralization

Mineralization Comments

Dec 07, 2005 (K R Kettles) - Little information has been recorded by the company about the nature of the No. 8 zone. Production from the zone was confined to the hanging wall area of a shear in talc-chlorite schist. The zone was relatively flat dipping, at about 45 deg to the southeast.

May 01, 2015 (Therese Pettigrew) - Zone 8 is hosted in quartz-carbonate veins with common visible gold located close to the contact between ultramafic and mafic units of the Balmer assemblage. The known extent and mining of Zone 8 was originally limited to levels 22 to 27, or approximately 1,061 to 1,321 metres below surface. Further drilling from Claude has expanded the known extent of the Zone 8 vein down-dip. The new Zone 8 model used in resource estimation strikes 030º dips 40º to the southeast and is 100 metres wide and 500 metres deep. Mineralization in Zone 8 is slightly discordant to the other three gold mineralized zones at Madsen.

Alteration Comments

Dec 07, 2005 (K R Kettles) - The ultramafic and mafic rocks hosting the gold are altered to talc-chlorite schist.

Mineral Record Details

Mineral Zones - Size and Shape

Rank: 1       Structure Type: Shear

Site Visit Information

Date: Nov 28, 1996

Geologist: K R Kettles

Notes: N/A

References

File - Resident Geologist files Baird #30 (1940-73), #42 (1944-69)

Publication Number: Date:

Author:

Publisher Name:

Location: Red Lake RGP office

Map - Baird Township, eastern part, Kenora District

Publication Number: M2072 Scale: 1:12,000    Date: 1997

Author: Ferguson S.A.

Publisher Name: Ontario Dept. of Mines

Location:

Article - The nature of hydrothermal alteration associated with the Madsen and Starratt-Olsen gold deposits, Red Lake area

Publication Number: MP110.010 Date: 1997

Author: Durocher M.E.

Publisher Name: Ontario Geological Survey

Location:

Compend - Summary of field work, 1983

Publication Number: MP116 Page: 216-219  Date: 1983

Author: Wood J., White O.L., Barlow R.B., Colvine A.C.

Publisher Name: Ontario Geological Survey

Location:

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

Publication Number: OFR5558 Page: 4-5  Date: 1987

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

Publisher Name: Ontario Geological Survey

Location:

Part - Geology and mineral deposits of the Red Lake area

Publication Number: ARV49-02 Page: 174-181  Date: 1998

Author: Horwood H.C.

Publisher Name: Ontario Dept. of Mines

Location:

MonoMap - Geology of the eastern part of Baird Township, District of Kenora

Publication Number: R039 Page: 23-28  Date: 1997

Author: Ferguson S.A.

Publisher Name: Ontario Dept. of Mines

Location:

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Ministry Contact Information

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