Ontario Geological Survey
Permanent Link to this Record:
MDI52N04SE00144
Record Name(s) | Cordoba Mines DDH# 58-30,31 - 1958 |
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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: Copper
Secondary Commodities: Gold
Township or Area: Balmer
Latitude: 51° 4' 12.43" Longitude: -93° 38' 50.86"
UTM Zone: 15 Easting: 454636.624 Northing: 5657821.915 UTM Datum: NAD83
Resident Geologist District: Red Lake
NTS Grid: 52N04SE
Point Location Description: DDH 58-31 northeast of McDougal Lake on prelim map P.1976A
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.
Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
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14 | 52N04SE0124 | 52N04SE0124 |
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 sulphide rich sections of the oxide facies iron formation. Most of the EM and magnetometer anomalies have been recognized as iron formation units.
Rock Type | Rank | Composition | Texture | Relationship | Sulphide Ironstone | 1 | Sulphide-Oxide | Iron Formation | Host |
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Mafic lava flow-unsubdivided | 2 | Altered | Flows | Adjacent |
Dec 07, 2005 (K R Kettles) - The iron formation units are oxide facies, and up to 18 m in thickness, and contain sulphide rich sections.
Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
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1 | Chalcopyrite | Economic | Ore | ||||
2 | Magnetite | Economic | Ore | ||||
3 | Pyrite | Economic | Ore | ||||
4 | Pyrrhotite | Economic | Ore | ||||
5 | Gold | Economic | Ore | ||||
1 | Chert | Economic | Gangue | ||||
Carbonate | Alteration | Carbonatization | 1 | ||||
Silica | Alteration | Silicification | 2 | ||||
Biotite | Alteration | Biotitic | 3 |
Dec 07, 2005 (K R Kettles) - Several oxide facies iron formation units , up to 18 m in thickness, were intersected in drill holes #58-30 and #58-31. Sulphide rich sections containing pyrite, chalcopyrite, and pyrrhotite contain only low gold values. Assay results indicate the iron formation contains only very low gold values but interesting copper values. The results are: 5.56% Cu/0.98 m; 0.53% Cu/1.95 m; 1.03% Cu/ 0.76 m; and 1.14% Cu/0.61 m.
Dec 07, 2005 (K R Kettles) - The mafic metavolcanic rocks are carbonatized and silicified, and are locally biotitic, and garnetiferous.
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 1985 Balmer #113, 116
Publication Number: AF RL 1985 Date: 1985
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: 232-233 Date: 1987
Author: Durocher M.E., Burchell P.S., Andrews A.J.
Publisher Name: Ontario Geological Survey
Location:
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