Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI42A09SW00127

Record: MDI42A09SW00127

General

Commodities

Primary Commodities: Gold

Secondary Commodities: Zinc, Lead

Location

Township or Area: Munro

Latitude: 48° 32' 26.42"    Longitude: -80° 15' 1.67"

UTM Zone: 17    Easting: 555325.199   Northing: 5376667.711    UTM Datum: NAD83

Resident Geologist District: Kirkland Lake

NTS Grid: 42A09SW

Point Location Description: A point 0.40 km north and 1.80 km east of the southwest corner of Munro Township.

Location Method: Conversion from MDI

Access Description: Access to the area is provided by Highway 101 (which passes through the claim group) and by overgrown dirt roads and trails which join Highway 101 (as indicated by Satterly 1952 and Prest 1953).

Exploration History

1908: MUNRO MINES LTD.: incorporated after gold discovered on property. - [1910]: excavated 90 ft deep shaft. 1911: DETROIT NEW ONTARIO MINES: 100 ft deep shaft and surface plant on their property; 200 ft of drifting/x-cutting on 3 narrow qtz veins; 50 tons material raised yielding 10 oz Au. MUNRO MINES LTD.: shaft 92 ft deep on property; 60 ft of drifting from shaft. 1915: MUNRO CONSOLIDATED GOLD MINES LTD.: incorporated to succeed to Munro Mines Ltd. 1916: DETROIT NEW ONTARIO MINES: surface plant burned in Great Fire. -[1911]: workings reach 183 ft level. 1936: WHITE-GUYATT MINING CO. LTD.: incorporated; purchased claims from Detroit New Ontario Mines and Munro Consolidated Mines; 2-2 comp. shafts on property, the 100 ft East (former Detroit New Ontario Mines) and the 90 ft West (former Munro Consolidated Mines). -[1937]: trenched 1,200 ft on No.1 vein; 2,500 ft DD; surface exploration. 1940: WRIGHT-HARGREAVE MINES LTD.: optioned property; dewatered East shaft; drifted 392 ft on 90 ft level; trenched 210 ft; u/g expl. via West shaft on 60 ft level. -[1941]:drifted 40 ft, x-cut 40 ft on West shaft 60 ft level; drifted 1,079 ft, x-cut 353 ft on East shaft 90 ft level; vis. Au reported u/g, native Au reported removed from 28 ft surface exposure. 1945-46: WHITE-GUYATT MINING CO. LTD.: 40 DDH's (15,812 ft); surf. expl.; vis. Au discovered in No.2 vein.; 40 lb bulk sample averaged 1.82 oz Au / ton (from No.2 vein). -[1980]: 4,545 tons of stockpiled material milled. -[1987]: surf. expl. (geol., geophys., geochem. surveys, and trenching; joint agreement with Lac Minerals Ltd. to jointly explore claims. 1988-90: LAC MINERALS LTD.: diamond drilled.

Geology

Province: Superior

Subprovince: Abitibi

Terrane: Wawa-Abitibi

Belt: Abitibi

Tectonic Assemblage: Stoughton-Roquemaure

Geological Age: Mesoarchean  

Metamorphism Grade: Greenschist

Geology Comments

Dec 07, 2005 (R Degagne) - Geological mapping (Satterly 1952; Prest 1953; Johnstone and Trowell 1985, 1984; Jensen and Baker 1986; Johnstone 1987; Johnstone and Steele 1989; Vagners 1984; McClenaghan et al. 1988, 1987; Steele 1988) indicates that auriferous quartz-carbonate veins which constitute the White-Guyatt occurrence are hosted mainly by weakly metamorphosed (greenschist or lower metamorphic facies) turbiditic sediments of the (Archean) Porcupine Group. Local bedrock stratigraphy is southeast striking, steeply south dipping (overturned), and north facing. The veins are spatially associated with the southeast striking contact between Porcupine Group metasediments (to the southwest) and (weakly metamorphosed) southeast striking, steeply north dipping and north facing subaqueously deposited tholeiitic volcanic rocks of the (Archean) Stoughton-Roquemaure Group. Intrusive rocks in the area include narrow (generally no wider than several tens of metres) diabase dikes of the (Proterozoic) Matachewan swarm (Heaman 1989), narrow (metres in width) hornblende lamprophyre dikes, and poorly known felsic dikes and masses which are exposed rarely, but which have been intersected by diamond drilling. A recent geophysical survey of Munro Township (OGS 1984) failed to detect any significant bedrock conductors to coincide with areas of known gold mineralization.

Lithology

Lithology Comments

Dec 07, 2005 (R Degagne) - The veins are spatially associated with the southeast striking contact between Porcupine Group metasediments (to the southwest) and (weakly metamorphosed) southeast striking, steeply north dipping and north facing subaqueously deposited tholeiitic volcanic rocks of the (Archean) Stoughton-Roquemaure Group. Intrusive rocks in the area include narrow (generally no wider than several tens of metres) diabase dikes of the (Proterozoic) Matachewan swarm (Heaman 1989), narrow (metres in width) hornblende lamprophyre dikes, and poorly known felsic dikes and masses which are exposed rarely, but which have been intersected by diamond drilling. A recent geophysical survey of Munro Township (OGS 1984) failed to detect any significant bedrock conductors to coincide with areas of known gold mineralization. Most exploration (including all known underground exploration) was concentrated on the No.1 vein, located in the northern part of claim nos. 9255 and 9256. This vein system was tested by diamond drilling above the 500 foot level and strikes slightly north of east, dips steeply south to subvertically (averaging 80 degrees south) and is reported to be traceable discontinuously along about 1,600 feet (Satterly 1952). The vein is hosted by variably sericitized and Fe-dolomitized interbedded turbiditic sediments which strike 110-125, dip steeply south and face north. Satterly (1952) indicated that the No.1 vein is hosted ...in strong shear zones, or faults... (p.54). Outcrop near the No.1 vein consists of fractured and quartz veined (060 striking and subvertically dipping near the West shaft and 075 striking and subvertically dipping in the East shaft area) interbedded turbiditic wackes and argillites. No evidence of strong shearing was observed in the muck filled trenches developed along the No.1 vein or in the dump and/or muck samples from them. This suggests that rather than a zone of shear, the No.1 vein system is developed within a zone of brittle deformation.

Mineralization

Mineralization Comments

Dec 07, 2005 (R Degagne) - Dump samples from the shaft area (samples AB-85-123 through AB-85- 126) indicate that the vein material on which the shaft was sunk consists of narrow (centimetre scale) quartz-Fe-dolomite and younger quartz-calcite veinlets which are mineralized with pyrite, sphalerite, and galena and which contain anomalously elevated gold tenors. The presence of 248 ppm of copper in one sample (sample AB-85-123) probably indicates that chalcopyrite is present as well. Hopkins (1915) noted that the No.1 vein contains pyrite and visible gold. Base metal assays from the No.1 vein area suggest that base metal tenors in the system are low, although Satterly (1952) noted that ...a pit...on strike from the [West] shaft, exposes quartz stringers cutting carbonatized greywacke. There is a sparse mineralization of pyrite, pyrrhotite, galena, and sphalerite. (p.54). Analyses*: AB-85-115a 4940 Au ppb, --- Ag ppm, 72 Cu ppm, 183 Pb ppm, 66 Zn ppm, 400 As ppm; AB-85-116 160 Au ppb, --- Ag ppm, --- Cu ppm, --- Pb ppm, --- Zn ppm, 83 As ppm; AB-85-117 41620 Au ppb, --- Ag ppm, 62 Cu ppm, 57 Pb ppm, 11 Zn ppm, 193 As ppm; 40660 Au ppb, --- Ag ppm, --- Cu ppm, --- Pb ppm, --- Zn ppm, --- As ppm; AB-85-118 440 Au ppb, -- Ag ppm, --- Cu ppm, --- Pb ppm, --- Zn ppm, 131 As ppm; AB-85-119 570 Au ppb, --- Ag ppm, 73 Cu ppm, 2 Pb ppm, 28 Zn ppm, 236 As ppm; AB-85-120 1780 Au ppb, --- Ag ppm,v --- Cu ppm, --- Pb ppm, --- Zn ppm, 219 As ppm; AB-85-122 nil Au ppb, 0.2 Ag ppm, 53 Cu ppm, 3 Pb ppm, 32 Zn ppm, 171 As ppm; AB-85-123 8640 Au ppb, 10.1 Ag ppm, 248 Cu ppm, 4200 Pb ppm, 4700 Zn ppm, 69 As ppm; 8430 Au ppb, --- Ag ppm, --- Cu ppm, --- Pb ppm, --- Zn ppm, -- As ppm; AB-85-124 2000 Au ppb, 2.0 Ag ppm, 72 Cu ppm, 443 Pb ppm, 2480 Zn ppm, 108 As ppm; AB-85-125 100 Au ppb, 1.3 Ag ppm, 95 Cu ppm, 1590 Pb ppm, 28800 Zn ppm, 156 As ppm; * All analyses performed by Swastika Laboratories Ltd., Swastika.

Alteration Comments

Dec 07, 2005 (R Degagne) - The vein is hosted by variably sericitized and Fe-dolomitized interbedded turbiditic sediments which strike 110-125, dip steeply south and face north. Although sericitization of the sediments in the area appears to be ubiquitous, Fe-dolomitization appears to be directly associated with the No.1 vein (samples AB-85-115a through AB-85-121). Thin section viewing indicates that albitization may also characterize the alteration mineral assemblage which is developed marginal to the No.1 vein (samples AB-85-116 and AB-85-121).

Mineral Record Details

Mineral Zones - Size and Shape

Site Visit Information

Date: Feb 05, 1997

Geologist: R Degagne

Notes: Visited in 1985, by A. C. Bath (OFR 5735, V.1, 1990).

References

Map - Quaternary geology of Matheson area, Cochrane District

Publication Number: P2735 Scale: 1:50,000    Date: 1985

Author: Vagners U.J.

Publisher Name: Ontario Geological Survey

Location:

Map - Township of Munro, District of Cochrane, Ontario

Publication Number: M1951-05 Date: 1997

Author: Satterly J., Hogg N.

Publisher Name: Ontario Dept. of Mines

Location:

Map - Geophysical/geochemical series, Matheson-Black River area, Munro Township, airborne electromagnetic survey, total intensity magnetic survey, District of Cochrane

Publication Number: M80586 Scale: 1:20,000    Date: 1984

Author: Questor Surveys Ltd.

Publisher Name: Ontario Geological Survey

Location:

Part - Geology of Munro Township

Publication Number: ARV60-08 Page: 53-56  Date: 1997

Author: Satterly J.

Publisher Name: Ontario Dept. of Mines

Location:

Map - Gold area between lakes Abitibi and Night Hawk, District of Timiskaming

Publication Number: ARM28B Scale: 1:126,720    Date: 1998

Author: Knight C.W., Burrows A.G., Hopkins P.E., Parsons A.L.

Publisher Name: Ontario Bureau of Mines

Location:

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

Publication Number: MDC013 Page: 81-82  Date: 1971

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

Publisher Name: Ontario Dept. of Mines and Northern Affairs

Location:

Map - Gold area between lakes Abitibi and Night Hawk, District of Timiskaming

Publication Number: ARM28B Scale: 1:126,720    Date: 1998

Author: Knight C.W., Burrows A.G., Hopkins P.E., Parsons A.L.

Publisher Name: Ontario Bureau of Mines

Location:

Mono - Preliminary report on the Timmins-Kirkland Lake area, gold deposits file

Publication Number: OFR5467 Page: G0007  Date: 1983

Author: Hodgson C.J.

Publisher Name: Ontario Geological Survey

Location:

Folio - Munro Township, District of Cochrane

Publication Number: GDIF361 Date: 1997

Author: Kirkland Lake RGO

Publisher Name: Ontario Geological Survey

Location:

Map - Black River-Matheson Area

Publication Number: OFM0013 Scale: 1:15,840    Date: 1985

Author: Johnstone R.M., Trowell N.F.

Publisher Name:

Location:

Map - Beatty-Munro gold area, District of Timiskaming

Publication Number: ARM24A Scale: 1:63,360    Date: 1998

Author: Hopkins P.E., Greenland C.W.

Publisher Name: Ontario Bureau of Mines

Location:

Mono - Mineral occurrences, deposits, and mines of the Black River-Matheson area

Publication Number: OFR5735 Page: 368-379  Date: 1990

Author: Bath A.C.

Publisher Name: Ontario Geological Survey

Location:

Part - The Beatty-Munro gold area

Publication Number: ARV24-01.004 Date: 1998

Author: Hopkins P.E.

Publisher Name: Ontario Bureau of Mines

Location:

Article - Precambrian geology of the Black River-Matheson (BRIM) area, District of Cochrane

Publication Number: MP126.056S Date: 1997

Author: Johnstone R.M., Trowell N.F.

Publisher Name: Ontario Geological Survey

Location:

Article - Quaternary geology and geochemical exploration in the Matheson area

Publication Number: MP140.294 Date: 1997

Author: McClenaghan M.B., Lavin O.P., Nichol I., Shaw J.

Publisher Name: Ontario Geological Survey

Location:

Part - Abitibi-Night Hawk gold area, District of Timiskaming

Publication Number: ARV28-02.001 Date: 1998

Author: Knight C.W., Burrows A.G., Hopkins P.E., Parsons A.L.

Publisher Name: Ontario Bureau of Mines

Location:

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