Ontario Geological Survey
Permanent Link to this Record:
MDI52N04SE00029
| Record Name(s) | Cordoba Mines DDH# 58-54 - 1958 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1991-Mar-12 |
| Date Last Modified | 2022-Aug-30 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Secondary Commodities: Copper
Township or Area: Balmer
Latitude: 51° 4' 2.95" Longitude: -93° 38' 9.63"
UTM Zone: 15 Easting: 455436.622 Northing: 5657521.907 UTM Datum: NAD83
Resident Geologist District: Red Lake
NTS Grid: 52N04SE
Point Location Description: DDH 58-54 east of McDougal Lake on 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 |
|---|---|---|
| 13 | 52N04SE0118 | 52N04SE0118 |
| 14 | 52N04SE0124 | 52N04SE0124 |
| 2.8652 | 52N04SE0027 | 52N04SE0027 |
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 a band of sulphide rich 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 Rich | Banded Iron Formation | Host |
|---|---|---|---|---|
| Mafic lava flow-unsubdivided | 2 | Altered | Flows | Adjacent |
Dec 07, 2005 (K R Kettles) - The iron formation beds are sulphide rich and occurs as interflow units. Sulphides occur as masive band of pyrrhotite up to 15 cm wide.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Gold | Economic | Ore | ||||
| 2 | Chalcopyrite | Economic | Ore | ||||
| 3 | Pyrite | Economic | Ore | ||||
| 4 | Pyrrhotite | Economic | Ore | ||||
| 1 | Chert | Economic | Gangue | ||||
| Carbonate | Alteration | Carbonatization | 1 | ||||
| Silica | Alteration | Silicification | 2 | ||||
| Biotite | Alteration | Biotitic | 3 | ||||
| Garnet | Alteration | Skarn | 4 |
Dec 07, 2005 (K R Kettles) - Gold mineralization occurs in a band of sulphide rich iron formation. The sulphides occur as massive bands of pyrrhotite up to 15 cm wide, and as pyrite and chalcopyrite fillings. DDH #58-54 intersected a sulphide rich iron formation unit. The sulphide rich section of this units assayed: 0.08 opt Au/0.55m and 0.13% Cu/5.5 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: 230-231 Date: 1987
Author: Durocher M.E., Burchell P.S., Andrews A.J.
Publisher Name: Ontario Geological Survey
Location:
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