Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52N04SW00309

Record: MDI52N04SW00309

General

Mineral Record Identification
Record Name(s) Slate Bay DDH-62-1 - 1962
Related Record Type Simple
Related Record(s)
Record Status Occurrence
Date Created 1991-Mar-11
Date Last Modified 2022-Jun-28
Created By
Revised By

Commodities

Primary Commodities: Gold, Silver, Copper



Location

Township or Area: McDonough

Latitude: 51° 7' 26.28"    Longitude: -93° 52' 18.64"

UTM Zone: 15    Easting: 438986.71   Northing: 5663972.06    UTM Datum: NAD83

Resident Geologist District: Red Lake

NTS Grid: 52N04SW

Point Location Description: N/A

Location Method: Data Compilation



Exploration History

1962: The property was held by Cochenour Exploration Ltd. Four diamond drill holes were completed.


Geology

Province: Superior

Subprovince: Uchi

Terrane: North Caribou

Domain: Uchi

Belt: Red Lake

Geological Age: Archean  

Metamorphism Type: Regional

Metamorphism Grade: Greenschist



Lithology

Lithology Data
Rock Type Rank Composition Texture Relationship
Vein 1 Quartz Host
Mafic lava flow-unsubdivided 2 Flows Variolitic, Amygdaloidal Adjacent
Mudstone 3 Graphitic Sediments Near
Quartz-Feldspar Porphyry 4 Quartz Porphyry Dikes Intrudes
Gabbro 5 Gabbro Dikes Near

Lithology Comments

Dec 07, 2005 (K R Kettles) - The occurrence is primarily underlain by mafic metavolcanic flows. These units include pillowed, variolitic and amygdaloidal flows. Stratigraphic tops are to the west-northwest. The metavolcanics strike approximately northeast-southwest and dip steeply to the southeast. Thin units of chert and graphitic sediments have been observed in the vicinity of the occurrence. Pyrite and pyrrhotite are locally abundant in the sedimentary rocks. Quartz porphyry dikes are common. A few gabbroic dikes have also been recognized. Gold mineralization appears to be confined to the highly silicified and sometimes chloritized mafic metavolcanics. The best gold values appear to be associated with high Py and Po contents. High silver values also appear to be closely associated with high concentrations of sulphides, but not necessarily with good gold values. Chalcopyrite is present in highly mineralized amphibolitized mafic metavolcanics.




Mineralization

Mineralization and Alteration
Rank Mineral Name Class Economic Mineral Type Alteration Mineral Type Alteration Ranking Alteration Intensity Alteration Style
1GoldEconomicOre
2SilverEconomicOre
3ChalcopyriteEconomicOre
4PyriteEconomicOre
5PyrrhotiteEconomicOre
1QuartzEconomicGangue
2TourmalineEconomicGangue
CalaveriteAlterationSilicification1StrongNetwork
CarbonateAlterationCarbonatization2WeakDisseminated
ChloriteAlterationChloritic3WeakStockwork
EpidoteAlterationEpidotization4WeakStockwork

Mineralization Comments

Nov 07, 2014 (K R Kettles) - Gold mineralization appears to be confined to the highly silicified and sometimes chloritized mafic metavolcanics. The best gold values appear to be associated with high Py and Po contents. High silver values also appear to be closely associated with high concentrations of sulphides, but not necessarily with good gold values. Chalcopyrite is present in highly mineralized amphibolitized mafic metavolcanics. Several interesting values of Au, Ag and Cu were obtained from drill core. The best values obtained are: 0.06 oz/ton (2.057 g/tonne)Au over .43 m 0.675% Cu over 1.1 m 0.94 oz/ton (32.228 g/tonne)Ag over 1.13 m, and 0.24 oz/ton (8.228g/tonne)Ag over .4 m.



Alteration Comments

Dec 07, 2005 (K R Kettles) - The mafic metavolcanic rocks are highly silicified, and locally carbonatized. Chlorite and epidote are present along fractures.




Mineral Record Details

References

File - Resident Geologist files AF RL 1962 McDonough #18

Publication Number: AF RL 1962 Date: 1962

Author: Hutton, D.A.

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: 557-558  Date: 1987

Author: Durocher M.E., Burchell P.S., Andrews A.J.

Publisher Name: Ontario Geological Survey

Location:


Map - Geological series, McDonough Township, District of Kenora (Patricia Portion)

Publication Number: P1240 Scale: 1:12,000    Date: 1977

Author: Pirie J., Sawitzky E.

Publisher Name: Ontario Geological Survey

Location:


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For detailed information regarding this mineral record please contact the Red Lake Resident Geologist District Office