Ontario Geological Survey
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MDI42A08NE00013
| Record Name(s) | Brett-Tretheway - 1991, Caswell - 1991 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1991-Mar-09 |
| Date Last Modified | 2023-Apr-12 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Barnet
Latitude: 48° 25' 39.87" Longitude: -80° 4' 55.5"
UTM Zone: 17 Easting: 567904.234 Northing: 5364250.654 UTM Datum: NAD83
Resident Geologist District: Kirkland Lake
NTS Grid: 42A08SW
Point Location Description: Shaft
Location Method: Conversion from MDI
Access Description: Point Located: A point 2.40 km south of and 4.64 km west of the northeast corner of Barnet Township.
1927: J. Brett and D. Duffy discovered spectacular coarse grained native gold (Gledhill 1929). The Brett-Tretheway Mining Co. was formed (Rogers and Young 1928), a vertical 125 foot deep shaft was sunk, and about 100 feet of crosscutting was completed. About $3,000 worth of gold (about 145 ounces) is reported to have been mined. 1928: Brett-Tretheway Mining completed 8,590 feet of trenching and pitting (Sinclair et al. 1930). 1929: Operations were suspended (Kindle 1936). 1944: F.L. Cooper sampled quartz veins. 1946: A Mr. Caswell diamond drilled 1 hole which yielded anomalously auriferous material (a core length of 3 feet averaged 0.20 ounce of gold per ton). 1975: R. Bugow trenched near the shaft. 1979: J.P. Larche completed a VLF electromagnetic survey. 1986: F. Kiernicki and M. Leahy (of Kirkland Lake) completed magnetic and VLF electromagnetic surveys. 1987: Noranda Exploration Co. Ltd. optioned the mine from M. Leahy and overburden drilled 29 holes totalling 2,305 feet near the shaft.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| KL-0338, 2.4583 | 42A08NE0228 | 42A08NE0228 |
| KL-1571, 2.2940 | 42A08NE0233 | 42A08NE0233 |
Province: Superior
Subprovince: Abitibi
Terrane: Wawa-Abitibi
Belt: Abitibi
Geological Age: Archean
Metamorphism Grade: Greenschist
Dec 07, 2005 (D Guidon) - Sparsely exposed (Baker et al. 1980; McClenaghan et al. 1988, 1987; Steele 1988) east southeast striking, south dipping, and south facing weakly metamorphosed (greenschist or lower metamorphic facies) subaqueously deposited tholeiitic basalt of the (Archean) Kinojevis Group and an east striking and south 45 degrees dipping (possibly conformable) syenite porphyry dike are the host rocks (Jensen 1989, 1985; Jensen and Baker 1986; Johnstone and Steele 1989).
Dec 07, 2005 (C Salo) - Sparsely exposed (Baker et al. 1980; McClenaghan et al. 1988, 1987; Steele 1988) east southeast striking, south dipping, and south facing weakly metamorphosed (greenschist or lower metamorphic facies) subaqueously deposited tholeiitic basalt of the (Archean) Kinojevis Group and an east striking and south 45 degrees dipping (possibly conformable) syenite porphyry dike are the host rocks (Jensen 1989, 1985; Jensen and Baker 1986; Johnstone and Steele 1989).
| Rock Type | Rank | Composition | Texture | Relationship | Mafic lava flow-unsubdivided | 1 | Basalt | Near |
|---|---|---|---|---|
| Syenite | 2 | Syenitic Dike | Porphyry | Host |
| Vein | 3 | Quartz | Host |
Dec 07, 2005 (D Guidon) - Rocks near the dike contact are reported (assessment files, Resident Geologist's Office, Kirkland Lake) to be altered (of unspecified type) and to display little shearing. Several feldspar-phyric dike like masses are also reported to occur near the mineralized zone.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Telluride | Economic | Ore | ||||
| 3 | Gold | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue |
Dec 07, 2005 (D Guidon) - Coarse grained native gold is reported (assessment files) to occur in the porphyritic dike and leaf gold, some of which is reported to have been as large as quarters, is reported to occur in diorite (dioritic basalt?) marginal to the dike. A gold nugget worth $600 is reported (assessment files) to have been found on the property (this nugget would have weighed about 29 troy ounces of gold, assuming a prevailing gold price of $20.67 per ounce). Quartz veins west of the shaft (in the northwest quarter of the south half of lot 8, concession VI, Barnet Township) are also reported (assessment files) to yield assays as high as 0.02 ounce of gold per ton.
Dec 07, 2005 (C Salo) - Rocks near the dike contact are reported (assessment files, Resident Geologist's Office, Kirkland Lake) to be altered (of unspecified type) and to display little shearing. Several feldspar-phyric dike like masses are also reported to occur near the mineralized zone. Coarse grained native gold is reported (assessment files) to occur in the porphyritic dike and leaf gold, some of which is reported to have been as large as quarters, is reported to occur in diorite (dioritic basalt?) marginal to the dike. A gold nugget worth $600 is reported (assessment files) to have been found on the property (this nugget would have weighed about 29 troy ounces of gold, assuming a prevailing gold price of $20.67 per ounce). Quartz veins west of the shaft (in the northwest quarter of the south half of lot 8, concession VI, Barnet Township) are also reported (assessment files) to yield assays as high as 0.02 ounce of gold per ton.
| Year | Tonnes | Commodities | Reference | Comment |
|---|---|---|---|---|
| 1927 | 660 |
Gold 3888 |
Assessment file | Tonnage not reported - assumed 0.2 opt |
File - Resident Geologist files KL-0275, KL-0582, KL-1414, KL-2010
Publication Number: Date:
Author:
Publisher Name:
Location: Kirkland Lake RGP office
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, Precambrian geology, Caithness, and parts of Scholfield, Pelletier and Doherty townships, Hearst-Kapuskasing area, Algoma and Cochrane districts
Publication Number: P2961 Scale: 1:31,680 Date: 1986
Author: Berger B.R., MacMillan D.W., Roy P.L.
Publisher Name: Ontario Geological Survey
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:
Mono - Preliminary report on the Timmins-Kirkland Lake area, gold deposits file
Publication Number: OFR5467 Page: G0082 Date: 1983
Author: Hodgson C.J.
Publisher Name: Ontario Geological Survey
Location:
Folio - Barnet Township, District of Cochrane
Publication Number: GDIF349 Date: 1997
Author: Kirkland Lake RGO
Publisher Name: Ontario Geological Survey
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:
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: 1181-1185 Date: 1990
Author: Bath A.C.
Publisher Name: Ontario Geological Survey
Location:
Map - Geophysical/geochemical series, Matheson-Black River area, Barnet Township, airborne electromagnetic survey, total intensity magnetic survey, District of Cochrane
Publication Number: M80607 Scale: 1:20,000 Date: 1984
Author: Questor Surveys Ltd.
Publisher Name: Ontario Geological Survey
Location:
Part - Ben Nevis, Munro, Kamiskotia, and other base metal areas, districts of Cochrane and Timiskaming
Publication Number: ARV37-03.001 Date: 1998
Author: Gledhill T.L.
Publisher Name: Ontario Dept. of Mines
Location:
Article - Quaternary geology and geochemical exploration in the Matheson area
Publication Number: MP136.294 Page: 200-214 Date: 1997
Author: McClenaghan M.B., Lavin O.P., Nichol I., Shaw J.
Publisher Name: Ontario Geological Survey
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:
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:
Part - Statistical review of Ontario's mineral industry in 1927
Publication Number: ARV37-01.001 Date: 1998
Author: Rogers W.R., Young A.C.
Publisher Name: Ontario Dept. of Mines
Location:
Part - Mines of Ontario
Publication Number: ARV28-01.003 Date: 1998
Author: Sutherland T.F., Collins E.A., Stovel J.H., Webster A.R.
Publisher Name: Ontario Bureau of Mines
Location:
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