Ontario Geological Survey
Permanent Link to this Record:
MDI52N04SE00150
| Record Name(s) | McDougal Lake Au-Cu Showing - 1954, Cordoba Mines - McDougal Lake Au Showing - 1956 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1991-Mar-12 |
| Date Last Modified | 2022-May-06 |
| Created By | |
| Revised By |
Primary Commodities: Copper, Gold
Township or Area: Balmer
Latitude: 51° 4' 23.31" Longitude: -93° 40' 10.66"
UTM Zone: 15 Easting: 453086.62 Northing: 5658171.92 UTM Datum: NAD83
Resident Geologist District: Red Lake
NTS Grid: 52N04SE
Point Location Description: Vertical DDH 59-82 east of KRL 38904 on map P1976A
Location Method: Data Compilation
Pre 1954: Property held by 8 separate mining companies who performed surface work and drilled at least 70 drill holes totalling over 8400 m. 1954:C. Petersen and H. Pokholm drilled 3 holes totalling 98.8 m. 1955:Completed 8 drill holes totalling 280.6 m. 1956-1960: Cordoba Mines Ltd. performed an airborne magnetometer survey and drilled over 100 holes, no footage given. 1969-1983: Property was split up with 8 to 9 companies performing work. In this period at least 49 holes were drilled totalling over 6300 m, and several EM and magnetometer surveys were performed over various parts of the property.
Province: Superior
Subprovince: Uchi
Terrane: North Caribou
Domain: Uchi
Belt: Red Lake
Geological Age: Archean
Metamorphism Type: Regional
Metamorphism Grade: Amphibolite
| Rock Type | Rank | Composition | Texture | Relationship | Oxide Ironstone | 1 | Oxide Facies | Brecciated, Contorted Unit | Host |
|---|
Dec 07, 2005 (K R Kettles) - The iron formation unit is highly contorted, and is composed of oxide facies. It is 350 m in length.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Pyrrhotite | Economic | Ore | ||||
| 3 | Magnetite | Economic | Ore | ||||
| 4 | Chalcopyrite | Economic | Ore | ||||
| 5 | Gold | Economic | Ore | ||||
| 6 | Silver | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue | ||||
| 2 | Chert | Economic | Gangue | ||||
| Carbonate | Alteration | Carbonatization | 1 | Medium | Stockwork | ||
| Silica | Alteration | Silicification | 2 | Medium | Veins | ||
| Biotite | Alteration | Biotitic | 3 | Unknown | Disseminated |
Dec 07, 2005 (K R Kettles) - Gold mineralization occurs in a highly contorted oxide facies iron formation unit. In the fold noses the iron formation unit is brecciated and contains quartz-carbonate and sulphide veins. The iron formation is approximately 350 m in length. The zone has been investigated by diamond drilling, and extends at least to 440 m in depth. The best assays obtained from this prospect are summarized as follows: DDH#58-51: 0.12 opt Au/1.5 m. ddh#59-74:0.08 opt Au/0.75 m. ddh#59-77: 0.12 opt Au/0.75 m. ddh#59-78: 0.09 opt Au/0.98 m. ddh#59-81: 0.18 opt Au/0.38 m; 1.6% Cu/0.27 m. ddh#59-82: 0.17 opt Au/0.98 m; 0.08 opt Au/1.50 m.
Dec 07, 2005 (K R Kettles) - The mafic metavolcanic rocks are carbonatized and silicified, and are locally biotitic, and garnetiferous.
| Rank | Classification |
|---|---|
| 1 | Unknown |
| Rank | Characteristic |
|---|---|
| 2 | Breccia |
| 1 | Stratabound |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Unknown | 350 | 1 | 400 | 160 | 87 |
Date: Jan 17, 1997
Geologist: K R Kettles
Notes: N/A
File - Red Lake Resident Geologists Files 1959 Balmer #42
Publication Number: AF RL 1959 Date: 1959
Author: Bradshaw, R.J.
Publisher Name:
Location: Red Lake RGP
Map - Geological series, Balmer Township, District of Kenora (Patricia Portion)
Publication Number: P1976A Scale: 1:12,000 Date: 1978
Author: Pirie J., Grant A.
Publisher Name: Ontario Geological Survey
Location:
File - Red Lake Resident Geologists Files 1972 Balmer #63
Publication Number: AF RL 1972 Date: 1972
Author:
Publisher Name:
Location: Red Lake RGP
File - Red Lake Resident Geologists Files 1975 Balmer #79
Publication Number: AF RL 1975 Date: 1975
Author:
Publisher Name:
Location: Red Lake RGP
File - Red Lake Resident Geologists Files 1978 Balmer #71
Publication Number: AF RL 1978 Date: 1978
Author:
Publisher Name:
Location: Red Lake RGP
Mono - Gold occurrences, prospects, and deposits of the Red Lake area, volumes 1 and 2
Publication Number: OFR5558 Page: 236-237 Date: 1987
Author: Durocher M.E., Burchell P.S., Andrews A.J.
Publisher Name: Ontario Geological Survey
Location:
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