Ontario Geological Survey
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MDI52A10NE00021
| Record Name(s) | Detroit-Algoma - 1906, Wright - 1871 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1979-Dec-18 |
| Date Last Modified | 2022-Mar-04 |
| Created By | |
| Revised By |
Primary Commodities: Lead, Copper, Gold
Secondary Commodities: Barite, Silver, Zinc
Township or Area: McTavish
Latitude: 48° 40' 49.14" Longitude: -88° 40' 21.66"
UTM Zone: 16 Easting: 376877 Northing: 5393269 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52A10NE
Point Location Description: Maps in the Thunder Bay mineral deposit files
Location Method: Data Compilation
1871: Vein was discovered by D. MacEachern and patented by T.H. Wright. 1882: A.W. Wright acquired the title to the property. 1906: 25% of the interest was deeded to W.H. Morris and the Detroit-Algoma Mining Company was formed. 1906-09: stripping and test pitting was done. 1910: A hoisting engine, boiler, compressor machine drill and a mill were erected. A 2.1 x 2.7 m shaft was sunk to a depth of 15.6 m. Development continued until 1914. 1976: G. Noyes acquired the property and filled in two shafts by bulldozer. No assessment reports were found on file.
Province: Southern
Subprovince: Nipigon Basin
Formation Group: Sibley Group
Geological Age: Mesoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Granite | 1 |
|---|---|---|---|---|
| Terrigenous-Clastic-Unsubdivided | 2 | |||
| Breccia-unsubdivided | 3 | Host |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Galena | Economic | Ore | ||||
| 2 | Sphalerite | Economic | Ore | ||||
| 3 | Chalcopyrite | Economic | Ore | ||||
| 4 | Pyrite | Economic | Ore | ||||
| 5 | Amethyst | Economic | Ore | ||||
| 1 | Calcite | Economic | Gangue | ||||
| 2 | Barite | Economic | Gangue | ||||
| 3 | Quartz | Economic | Gangue |
Mar 09, 2020 (Therese Pettigrew) - The old Wright shaft is situated on a mineralized fault-breccia zone, which trends N 55 E. The fault and breccia dip steeply north, the north side having been down faulted. The zone, which may be observed at intervals over a length of 53 chains, lies mainly in granite over which a thin layer of Nipigon sediments, dolomite, sandstones, and conglomerate, occur. It is similar in most respects to other deposits described, consisting of a stockwork of fine quartz stringers in much-fractured dolomite, sandstone, or granite, and cemented smaller angular fragments. In width the zone ranges from 2 to 10 feet, the average being about 3 feet. Throughout it is rather sparingly mineralized with fine galena, sphalerite, and occasionally chalcopyrite. Calcite, barite, and amethyst occur with the white quartz. The shaft was sunk to a depth of 50 feet, but was only accessible (in 1929) to a depth of 25 feet. At this point the zone consists of an 8-inch vein of quartz carrying abundant galena and 6 feet of much-fractured sandstone with narrow, half-inch quartz and calcite stringers, carrying galena in places. On the south footwall is a sandstone breccia with lenses and cement of quartz and fine galena. On the dump, samples of granite, granite breccia, and recomposed granite. were found, indicating that the shaft ended in granite. A sample across 5 feet, at the 25-foot level in the shaft, gave less than 1% lead and no zinc or silver. Gold and platinum have been reported from this deposit in the early days, but it is questionable whether the latter was found (Hawley, 1930). A sample mineralized with 25% sphalerite and galena, collected by G. Patterson in 1984 returned 0.01 oz/t Au and 0.69 oz/t Ag. Samples collected by A.W. Wright from 1911 returned 9.86% Cu and 6.40% Cu, but multiple labs reported that no platinum was found. Another certificate for a sample submitted by A.W. Wright in 1911 returned 16 dwts gold (24.8 g/t Au) although no subsequent samples tested more than trace gold. It was reported that 6 m down the shaft, a 0.3 m wide vein of rich chalcopyrite was found, which was likely the source of the copper and gold values. Sulphide mineralization is irregular. A sample from the north vein taken by A.W. Wright in 1908 returned 0.45 oz/t Ag, 209.6 pounds/t (10.48%) Pb, and trace zinc. A sample labelled as from Ore #1, taken in 1911 by A.W. Wright returned 6 oz/t Ag, 5.02% Cu, and no gold or platinum (Thunder Bay RGP office mineral deposit files).
Part - Lead and zinc deposits, Dorion and McTavish townships, Thunder Bay District
Publication Number: ARV38-06.002 Scale: Date: 1998
Author: Hawley J.E.
Publisher Name: Ontario Dept. of Mines
Location:
Publication - Fort William and Port Arthur, and Thunder Cape Map-area, Thunder Bay District, Ontario; Geological Survey of Canada, Memoir 167
Publication Number: GSC Memoir 167 Scale: Date: 1931
Author: Tanton, T.L.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/100799
Mono - Copper, nickel, lead and zinc deposits of Ontario
Publication Number: MDC012 Scale: Date: 1969
Author: Shklanka R.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Amethyst deposits of Ontario
Publication Number: GB05 Scale: Date: 1998
Author: Vos M.A.
Publisher Name: Ontario Division of Mines
Location:
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