Ontario Geological Survey
Permanent Link to this Record:
MDI52N04SE00033
| Record Name(s) | Cordoba Mines DDH# 58-33 - 1958 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1991-Mar-12 |
| Date Last Modified | 2022-Aug-31 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Balmer
Latitude: 51° 3' 49.53" Longitude: -93° 39' 34.21"
UTM Zone: 15 Easting: 453786.621 Northing: 5657121.913 UTM Datum: NAD83
Resident Geologist District: Red Lake
NTS Grid: 52N04SE
Point Location Description: DDH 58-33 southwest of McDougal Lake on map P.1976A
Location Method: Conversion from MDI
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
Dec 07, 2005 (K R Kettles) - The Cordoba Property is primarily underlain by altered metavolcanic flows which strike NNW-SSE and dip steeply SW. Sulphide-bearing iron formation beds occur as interflow units. The iron formation units vary in thickness from a few metres up to a maximum of about 150 m, and some of the units have been traced for a strike length of over 3500 m. Locally, the iron formation units are contorted and brecciated, with quartz-carbonate and massive sulphide (generally pyrrhotite) veins filling fractures. Numerous mafic to felsic dikes have been observed on the property. Mineralization occurs in the chert magnetite iron formation. Most of the EM and magnetometer anomalies have been recognized as iron formation units.
| Rock Type | Rank | Composition | Texture | Relationship | Magnetite Ironstone | 1 | Chert Magnetite | Thich Iron Formation Unit | Host |
|---|---|---|---|---|
| Mafic lava flow-unsubdivided | 2 | Altered | Flows | Adjacent |
Dec 07, 2005 (K R Kettles) - The iron formation is a thick band of chert magnetite and minor chlorite, and contains seams of sulphides.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Chalcopyrite | Economic | Ore | ||||
| 3 | Pyrrhotite | Economic | Ore | ||||
| 4 | Magnetite | Economic | Ore | ||||
| 5 | Silver | Economic | Ore | ||||
| 6 | Gold | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue | ||||
| 2 | Chert | Economic | Gangue | ||||
| 3 | Carbonate | Economic | Gangue | ||||
| Cancrinite | Alteration | Carbonatization | 1 | ||||
| Silica | Alteration | Silicification | 2 | ||||
| Biotite | Alteration | Biotitic | 3 |
Dec 07, 2005 (K R Kettles) - Gold mineralization occurs in a thick iron formation unit, composed of chert magnetite and minor chlorite. The unit contains fine seams of pyrrhotite, disseminated pyrite, and the occasional bleb of chalcopyrite. In places, the rock is cut by irregular quartz-carbonate stringers. The following assays were obtained from sections of drill core from drill hole #58-33: 0.08 opt Au/1.29 m; 0.10 opt Au/1.22 m; and 0.20 opt Ag/4.58 m.
Dec 07, 2005 (K R Kettles) - The mafic metavolcanic rocks are carbonatized and silicified, and are locally biotitic, and garnetiferous.
File - Red Lake Resident Geologists Files 1958 Balmer #42
Publication Number: AF RL 1958 Date: 1958
Author: Jaeggin, R.P.
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 1970-72 Balmer #63
Publication Number: AF RL 1970 Date: 1970
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
File - Red Lake Resident Geologists Files 1985 Balmer #117
Publication Number: AF RL 1985 Date: 1985
Author:
Publisher Name:
Location: Red Lake RGP
File - Red Lake Resident Geologists Files 1989 Balmer #133
Publication Number: AF RL 1989 Date: 1989
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: 234-235 Date: 1987
Author: Durocher M.E., Burchell P.S., Andrews A.J.
Publisher Name: Ontario Geological Survey
Location:
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