Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI42A08NW00111

Record: MDI42A08NW00111

General

Commodities

Primary Commodities: Gold

Secondary Commodities: Lead, Zinc

Location

Township or Area: Bowman

Latitude: 48° 29' 30.99"    Longitude: -80° 26' 13.32"

UTM Zone: 17    Easting: 541594   Northing: 5371133    UTM Datum: NAD83

Resident Geologist District: Kirkland Lake

NTS Grid: 42A08NW

Point Location Description: A pit 4.21 km north and 1.30 km west of the southeast corner of Bowman Township.

Location Method: Data Compilation

Access Description:

Exploration History

1935: Sylvanite Gold Mines Ltd. : 14 grab samples from pitted quartz-carbonate veins in the north half of lot 2, concession 3. 1984: Asarco Exploration Co. of Canada Ltd. - OVD-19-1699 ft. 1977-1988: R.S. Allerston and Cross Lake Minerals Ltd. completed ground magnetic and geological surveys in the occurrence area. 1987-89: Cross Lake Minerals Ltd. - magnetic, VLF-EM and IP surveys, mapping. 1998-99: Pelangio-Larder Mines Ltd. - ground magnetometer survey, EM survey.

Assessment Work on File

Geology

Province: Superior

Subprovince: Abitibi

Terrane: Wawa-Abitibi

Belt: Abitibi

Geological Age: Mesoarchean  

Metamorphism Grade: Greenschist

Geology Comments

Dec 14, 2015 (R Degagne) - Bedrock strikes east, dips steeply, faces south, and forms part of the north limb of the east striking and east plunging Blake River Synclinorium. Intrusive rocks in the area include felsic stocks and batholiths (the nearest of which is about 1.6 km east southeast of the occurrence) and north striking diabase dikes of the (Proterozoic) Matachewan swarm, which occur within metres of the pitted quartz veins. A recent geophysical survey of Bowman Township failed to detect any significant bedrock conductors to be associated with the pitted quartz-calcite veins.

Lithology

Lithology Comments

Dec 14, 2015 (R Degagne) - Geological mapping indicates that bedrock in the area consists mainly of weakly metamorphosed (greenschist or lower metamorphic facies) tholeiitic volcanic rocks and volumetrically minor interflow sediment of the (Archean) Kinojevis Group. Tholeiitic basalt (samples AB-85-99 and -107a) and a narrow interflow sedimentary horizon (samples AB-85-100 through AB-85- 107b, except AB-85-107a) are intruded by diabase and quartz diabase dikes in an outcrop knob near the southwest corner of lot 2, concession 3, Bowman Township. Cherty siltstones and fine grained wackes here strike 084º, dip steeply, and may be followed discontinuously for several tens of metres before they are intruded by diabase dikes near the east and west limits of the bedrock exposure.

Mineralization

Mineralization Comments

Dec 14, 2015 (A Wilson) - Assays from the sampling completed by Sylvanite returned values ranging from 0.02 oz./t Au to 0.06 oz./t Au. Sampling by the ODM returned values ranging from 0.01 oz./t Au to 0.14 oz./t.

Dec 14, 2015 (R Degagne) - The interflow sediments are variably shattered and fractured and are recemented by quartz-calcite. A shallow pit near the eastern edge of this outcrop has been blasted into narrow (centimetre scale) quartz-albite veinlets hosted by cherty siltstone; these veinlets are of unknown geometry. Veinlet fragments in a small waste pile adjacent to this pit contain pyrite, sphalerite, and galena. No assayed samples obtained by the present writer averaged more than 70 ppb of gold or 103 ppm of copper. The two assayed samples of vein material containing megascopic galena and sphalerite (samples AB-85-106a and 106b) contained a maximum of 3720 ppm Pb and 5030 ppm Zn. Sampling of this outcrop by Leahy is reported by him to have yielded assays as high as 0.04 oz./t Au from an east striking quartz vein. Numerous prospect pits have been blasted into three sets of narrow veins exposed in a large bedrock exposure of tholeiitic basalt intruded by diabase dikes in the north half of lot 2, concession 3, Bowman Township. Leahy produced a sketch map of this outcrop and reported that sampling here completed by Sylvanite Gold Mines Ltd. in 1935 resulted in assays as high as 0.10 oz./t Au. Northeast and northwest striking vein sets consist of white, coarse grained quartz-epidote with only traces of pyrite. The third vein set is east striking (oriented subparallel to volcanic stratigraphy)and appears to be localized along narrow (decimetre scale) cherty interflow sedimentary rocks which are similar in appearance to those sampled by the present writer several hundred metres to the south and which are ubiquitous but discontinuously developed in this area. Leahy reported anomalously elevated gold tenors to be associated with the east striking vein set (sampling by him yielded assay values from these veins as high as 0.14 oz./t Au.

Alteration Comments

Dec 07, 2005 (R Degagne) - Sampling by the present writer yielded a gold assay of 310 ppb from a quartz-calcite-epidote vein hosted by altered (albitic) basalt (sample AB-85-114a) marginal to an 088 striking and steeply south dipping cherty interflow horizon (sample AB-85- 114b). Anomalously elevated zinc concentrations are also associated with the cherty interflow material here (samples AB- 85-109, 110, and -113).

Mineral Record Details

Mineral Zones - Size and Shape

Rank: 1       Structure Type: Shear

Site Visit Information

Date: Jan 14, 1997

Geologist: R Degagne

Notes: Analyses*: Sample: AB-85-100 20 Au ppb, 66 Cu ppm, 12 Pb ppm, 303 Zn ppm, --- Ag ppm, --- As ppm. AB-85-101 nil Au ppb, 41 Cu ppm, 78 Pb ppm, 117 Zn ppm, --- Ag ppm, --- As ppm. AB-85-102 nil Au ppb, 48 Cu ppm, 9 Pb ppm, 320 Zn ppm, --- Ag ppm, --- As ppm. AB-85-103 20 Au ppb, 47 Cu ppm, 8 Pb ppm, 213 Zn ppm, --- Ag ppm, --- As ppm. AB-85-104 nil Au ppb, 36 Cu ppm, 2 Pb ppm, 67 Zn ppm, --- Ag ppm, --- As ppm. AB-85-105 nil Au ppb, 65 Cu ppm, 4 Pb ppm, 477 Zn ppm, --- Ag ppm, --- As ppm. AB-85-106a 10 Au ppb, 100 Cu ppm, 2320 Pb ppm, 5030 Zn ppm, --- Ag ppm, --- As ppm. AB-85-106b nil Au ppb, 30 Cu ppm, 3720 Pb ppm, 1300 Zn ppm, --- Ag ppm, --- As ppm. AB-85=106c nil Au ppb, --- Cu ppm, --- Pb ppm, --- Zn ppm, --- Ag ppm, --- As ppm. AB-85-107 20 Au ppb, 103 Cu ppm, 41 Pb ppm, 493 Zn ppm, --- Ag ppm, --- As ppm. AB-85-109 70 Au ppb, --- Cu ppm, --- Pb ppm, --- Zn ppm, --- Ag ppm, --- As ppm. AB-85-110 nil Au ppb, 192 Cu ppm, 5 Pb ppm, 996 Zn ppm, --- Ag ppm, --- As ppm. AB-85-111 10 Au ppb, 101 Cu ppm, 3 Pb ppm, 834 Zn ppm, --- Ag ppm, --- As ppm. AB-85-112 nil Au ppb, 189 Cu ppm, 4 Pb ppm, 198 Zn ppm, --- Ag ppm, --- As ppm. AB-85-113 nil Au ppb, 295 Cu ppm, 9 Pb ppm, 60 Zn ppm, --- Ag ppm, --- As ppm. AB-85-114a nil Au ppb, 137 Cu ppm, 6 Pb ppm, 1060 Zn ppm, --- Ag ppm, --- As ppm. AB-85-114c 30 Au ppb, --- Cu ppm, --- Pb ppm, --- Zn ppm, nil Ag ppm, <1 As ppm. AB-85-114d nil Au ppb, --- Cu ppm, --- Pb ppm, --- Zn ppm, nil Ag ppm, <1 As ppm. * All analyses performed by Swastika Laboratories Ltd., Swastika.

References

Map - Geological series, Quaternary geology of the Ramore area, districts of Cochrane and Timiskaming

Publication Number: P2381 Scale: 1:50,000    Date: 1980

Author: Baker C.L., Seaman A.A., Steele K.G.

Publisher Name: Ontario Geological Survey

Location:

Article - Currie and Bowman townships, District of Cochrane

Publication Number: PR1963-02.012 Page: 23-24  Date: 1997

Author: Leahy E.J.

Publisher Name: Ontario Dept. of Mines

Location:

Map - Geological series, Precambrian geology, Ramore area, northwestern part, District of Cochrane

Publication Number: P2860 Scale: 1:15,840    Date: 1985

Author: Jensen L.S.

Publisher Name: Ontario Geological Survey

Location:

Map - Geological series, Precambrian geology, Ramore area, districts of Cochrane and Timiskaming

Publication Number: P3131 Scale: 1:63,360    Date: 1989

Author: Jensen L.S.

Publisher Name: Ontario Geological Survey

Location:

MonoMap - Geology of Currie and Bowman townships, District of Cochrane

Publication Number: R040 Page: 16-17  Date: 1997

Author: Leahy E.J.

Publisher Name: Ontario Dept. of Mines

Location:

Map - Geological series, preliminary results of bedrock samples from the sonic drilling, 1985, Lake Abitibi-Matheson area, District of Cochrane

Publication Number: P2986 Scale: 1:100,000    Date: 1986

Author: Jensen L.S., Steele K.G., McClenaghan M.B., Baker C.L.

Publisher Name: Ontario Geological Survey

Location:

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

Publication Number: MDC013 Page: 123  Date: 1971

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

Publisher Name: Ontario Dept. of Mines and Northern Affairs

Location:

Map - Geological series, Precambrian geology of the Magusi River area, Cochrane and Timiskaming districts

Publication Number: P2434 Scale: 1:63,360    Date: 1982

Author: Jensen L.S.

Publisher Name: Ontario Geological Survey

Location:

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

Publication Number: OFR5467 Page: G0071  Date: 1983

Author: Hodgson C.J.

Publisher Name: Ontario Geological Survey

Location:

Map - Geological Compilation of the Lake Abitibi Area, Abitibi Greenstone Belt

Publication Number: P3398 Scale: 1:100,000    Date: 1999

Author: Ayer J.A., Berger B.R., Trowell N.F.

Publisher Name: Ontario Geological Survey

Location:

Map - Geological series, bedrock samples from the sonic drilling program 1987, Matheson area, District of Cochrane

Publication Number: P3114 Scale: 1:100,000    Date: 1989

Author: Johnstone R.M., Sutcliffe R.H., Steele K.G., Baker C.L., McClenaghan M.B.

Publisher Name: Ontario Geological Survey

Location:

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

Publication Number: OFR5735 Page: 44-52  Date: 1990

Author: Bath A.C.

Publisher Name: Ontario Geological Survey

Location:

Map - Currie Township, District of Cochrane

Publication Number: P0204 Scale: 1:15,840    Date: 1997

Author: Leahy E.J.

Publisher Name: Ontario Dept. of Mines

Location:

Article - Quaternary geology and geochemical exploration in the Matheson area

Publication Number: MP140.294 Page: 112-123  Date: 1997

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

Publisher Name: Ontario Geological Survey

Location:

Map - Currie and Bowman townships, Cochrane District

Publication Number: M2071 Scale: 1:31,680    Date: 1997

Author: Leahy E.J.

Publisher Name: Ontario Dept. of Mines

Location:

Article - Reconnaissance till sampling program, Matheson-Lake Abitibi area, District of Cochrane

Publication Number: MP141.081 Page: 472-477  Date: 1997

Author: Steele K.G.

Publisher Name: Ontario Geological Survey

Location:

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

Publication Number: M80594 Scale: 1:20,000    Date: 1984

Author: Questor Surveys Ltd.

Publisher Name: Ontario Geological Survey

Location:

MonoMap - Geology and petrogenesis of the Archean Abitibi belt in the Kirkland Lake area, Ontario

Publication Number: MP123 Date: 1985

Author: Jensen L.S., Langford F.F.

Publisher Name: Ontario Geological Survey

Location:

Folio - Bowman Township, District of Cochrane

Publication Number: GDIF271 Date: 1997

Author: Kirkland Lake RGO

Publisher Name: Ontario Geological Survey

Location: Kirkland Lake RGO

Map - Precambrian Geology of the Highway 101 Area, East of Matheson, Ontario

Publication Number: M2676 Scale: 1:50,000    Date: 2003

Author: Berger B.R., Luinstra B., Ropchan J.C.

Publisher Name: Ontario Geological Survey

Location:

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