Ontario Geological Survey
Permanent Link to this Record:
MDI42A09SW00015
| Record Name(s) | Sylvanite 2 Occurrence - 1965, Sylvanite Gold Mines Ltd. - 1965 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1985-May-29 |
| Date Last Modified | 2022-Sep-27 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Bowman
Latitude: 48° 31' 8.71" Longitude: -80° 28' 54.87"
UTM Zone: 17 Easting: 538258.013 Northing: 5374126.742 UTM Datum: NAD83
Resident Geologist District: Kirkland Lake
NTS Grid: 42A09SW
Point Location Description: The trench 2.06 km south and 4.46 km west of the northeast corner of Bowman Township.
Location Method: Conversion from MDI
Pre-1965: Sylvanite Gold Mines Ltd. trenched a quartz-carbonate vein which was reported (Leahy 1965) to contain spectacular visible gold.
Province: Superior
Subprovince: Abitibi
Terrane: Wawa-Abitibi
Belt: Abitibi
Geological Age: Mesoarchean
Metamorphism Grade: Greenschist
Dec 07, 2005 (R Degagne) - Geological mapping (Leahy 1965, 1963; MERQ-0GS 1983; Jensen and Baker 1986; Johnstone and Steele 1989; Baker et al. 1980; Richard and McClenaghan 1985; Vagners 1984; McClenaghan et al. 1988, 1987; Steele 1988) indicates that bedrock in the area consists mainly of east striking, steeply dipping and south facing weakly metamorphosed (greenchist or lower metamorphic grade) subaqueously deposited volcanic rocks of the (Archean) Stoughton-Roquemaure Group. A recent geophysical survey of Bowman Township (OGS 1984) failed to detect any significant bedrock conductors in the occurrence area.
| Rock Type | Rank | Composition | Texture | Relationship | Porphyry-unsubdivided | 1 | Ser, Qv, Qv Bx, Py, Fu | Fel Porph; Schistose (Variably) | Host |
|---|---|---|---|---|
| Mafic lava flow-unsubdivided | 2 | Near | ||
| Vein | 3 | Quartz | Contains | |
| Breccia-unsubdivided | 4 | Qv | Contains |
Dec 07, 2005 (R Degagne) - A 2.5 foot wide quartz vein and/or quartz vein breccia with unspecified geometry and strike extent was once exposed in a 90 foot trench and is hosted by 'feldspar porphyry' which is variably sericitic and schistose. Spectacular free gold is reported to have been present; the best reported assay is 0.02 ounce of gold per ton (assessment files, Resident Geologist's Office, Kirkland Lake). Vein material observed by Leahy (1965) in a muck pile at this location was reported by him to be barren of sulfide minerals and visible gold although but the silicified porphyry host is reported by him to contain fine grained disseminated pyrite. The presence of fuchsite was also noted by Leahy (1963).
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Gold | Economic | Ore | ||||
| 2 | Pyrite | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue | ||||
| 2 | Carbonate | Economic | Gangue | ||||
| 3 | Sericite | Economic | Gangue | ||||
| 4 | Fuchsite | Economic | Gangue | ||||
| Sericite | Alteration | Sericitization | 1 | Replacement | |||
| Carbonate | Alteration | Carbonatization | 2 | ||||
| Fuchsite | Alteration | Carbonatization | 3 | Replacement |
Dec 07, 2005 (R Degagne) - A 2.5 foot wide quartz vein and/or quartz vein breccia with unspecified geometry and strike extent was once exposed in a 90 foot trench and is hosted by 'feldspar porphyry' which is variably sericitic and schistose. Spectacular free gold is reported to have been present; the best reported assay is 0.02 ounce of gold per ton (assessment files, Resident Geologist's Office, Kirkland Lake). Vein material observed by Leahy (1965) in a muck pile at this location was reported by him to be barren of sulfide minerals and visible gold although but the silicified porphyry host is reported by him to contain fine grained disseminated pyrite. The presence of fuchsite was also noted by Leahy (1963).
Dec 07, 2005 (R Degagne) - A 2.5 foot wide quartz vein and/or quartz vein breccia with unspecified geometry and strike extent was once exposed in a 90 foot trench and is hosted by 'feldspar porphyry' which is variably sericitic and schistose. The presence of fuchsite was also noted by Leahy (1963).
| Rank | Classification |
|---|---|
| 1 | Hydrothermal |
| Rank | Characteristic |
|---|---|
| 1 | Vein |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Unknown | .7 |
Date: Jan 14, 1997
Geologist: R Degagne
Notes: N/A
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:
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:
MonoMap - Geology of Currie and Bowman townships, District of Cochrane
Publication Number: R040 Page: 17 Date: 1997
Author: Leahy E.J.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Bowman Township, District of Cochrane
Publication Number: P0205 Scale: 1:15,840 Date: 1997
Author: Leahy E.J.
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 Page: 123 Date: 1971
Author: Ferguson S.A., Groen H.A., Haynes R.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
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:
Mono - Preliminary report on the Timmins-Kirkland Lake area, gold deposits file
Publication Number: OFR5467 Page: G0072 Date: 1983
Author: Hodgson C.J.
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:
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:
Map - Geological series, Quaternary geology, Porquis Junction area, District of Cochrane
Publication Number: P2949 Scale: 1:50,000 Date: 1985
Author: Richard J.A., 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: 52-55 Date: 1990
Author: Bath A.C.
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:
Map - Geological series, Quaternary geology, Watabeag River area, districts of Cochrane and Timiskaming
Publication Number: P2950 Scale: 1:50,000 Date: 1985
Author: Richard J.A., McClenaghan M.B.
Publisher Name: Ontario Geological Survey
Location:
Article - Reconnaissance till sampling program, Matheson-Lake Abitibi area, District of Cochrane
Publication Number: MP141.081 Date: 1997
Author: Steele K.G.
Publisher Name: Ontario Geological Survey
Location:
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:
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For detailed information regarding this mineral record please contact the Kirkland Lake Resident Geologist District Office