Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI42D09NW00010

Record: MDI42D09NW00010

General

Mineral Record Identification
Record Name(s) Dunlop Copper Project - 1983, W.B. Dunlop - 1983, Kinasco-Conwest - 1956
Related Record Type Simple
Related Record(s)
Record Status Occurrence
Date Created 1983-Mar-29
Date Last Modified 2022-Mar-02
Created By
Revised By

Commodities

Primary Commodities: Copper

Secondary Commodities: Zinc, Molybdenum, Nickel, Silver



Location

Township or Area: Pic

Latitude: 48° 43' 9.07"    Longitude: -86° 19' 32.94"

UTM Zone: 16    Easting: 549588   Northing: 5396459    UTM Datum: NAD83

Resident Geologist District: Thunder Bay South

NTS Grid: 42D09NW

Point Location Description: AMIS location

Location Method: Conversion from MDI



Exploration History

Interest in the area originated in the early to middle 1950s with the blasting of a rock cut for Highway 17 (Trans-Canada Highway) which revealed gabbro mineralized with chalcopyrite and pyrite extending over an area about 61 m by 15 m. 1955: Kinasco Exploration and Mining Ltd. conducted a self-potential survey and drilled 5 exploratory x-ray diamond drill holes. 1956: Kinasco drilled 10 DDH totalling 1928 m. 1961: International Nickel Company of Canada Ltd. (INCO) restaked the lapsed claims and completed a gravimetric survey over the main showing. 1962: Conwest Exploration Company Ltd. made a preliminary investigation of the property. 1964: Conwest drilled 2 DDH totalling 306 m. 1977: Anaconda American Brass held the claims. 1991: Noranda Exploration Company Ltd. conducted IP/Resistivity and total field magnetic surveys. 1992: Noranda drilled 2 DDH totalling 377 m. 1993: Stillwater acquired the dispositions.


Assessment Work on File

Assessment Work on File
Office File Number Online Assessment File Identifier Online Assessment File Directory
58 42D09NW0306 42D09NW0306
42D16SW0084 20000005919 20000005919
2.14472 42D09NW0003 42D09NW0003
11 42D09NW0133 42D09NW0133

Geology

Province: Superior

Subprovince: Wawa

Terrane: Wawa-Abitibi

Geological Age: Archean  



Lithology

Lithology Data
Rock Type Rank Composition Texture Relationship
Gabbro 1 Host
Breccia-unsubdivided 2 Host
Terrigenous-Clastic-Unsubdivided 3 Adjacent
Mafic lava flow-unsubdivided 4 Adjacent

Mineralization

Mineralization and Alteration
Rank Mineral Name Class Economic Mineral Type Alteration Mineral Type Alteration Ranking Alteration Intensity Alteration Style
1ChalcopyriteEconomicOre
2PyriteEconomicOre
3MolybdeniteEconomicOre
4PyrrhotiteEconomicOre

Mineralization Comments

Sep 29, 2015 (Therese Pettigrew) - The 1955 self-potential survey outlined an anomaly 610 m by 38 m. Diamond drilling intersected massive pyrite and chalcopyrite in four out of five holes. One intersection assayed 3.5%copper over 3 m, and another assayed 1.2% copper over 10 m. Most of the holes drilled in 1956 intersected medium- to fine-grained gabbro, highly metamorphosed sedimentary rocks, and minor monzonite. Massive and disseminated sulphides consisting mostly of pyrrhotite, pyrite, and minor chalcopyrite, were intersected in all of the holes. The best assays from Conway’s 1964 drilling gave nil values for gold, 0.03 ounces silver per ton, and 0.59 percent copper over 3 m, averaging 0.31 percent copper throughout. The gossan zone in the roadcut has undergone considerable weathering since 1956. Flat-lying contact breccia forms the host for the mineralization. Although some mineralized zones reportedly ran 2 percent copper over widths of up to 1.5 m, a grab sample collected by T. Muir, containing chalcopyrite and pyrite, assayed 0.85 percent copper and negligible lead, zinc, and nickel. A few traces of molybdenite were seen during the field examination (Muir, 1982). The mineralization occurs within a wide zone situated along the contact between gabbroic rocks of the Coldwell Complex and Archean metavolcanics and metasediments to the east. Within this zone, large rafts of supracrustal rocks have been assimilated with the host gabbros. Sulphides occur as disseminations of chalcopyrite and pyrrhotite (trace to 1%) within medium- to coarse-grained gabbro or as stringers and disseminations within the volcanics and sediments. The best assay values from hole ND92-1 and 2 returned 0.35% Cu over 6 m and 0.42% Cu over 4 m respectively (AFRI 42D09NW0306).



Mineral Record Details

Characteristics
Rank Characteristic            
1 Breccia

Mineral Zones - Size and Shape

Zone Name: Detour Lake - Rank 1
Shape Length Thickness Depth Strike Dip Plunge Trend Age Reference
Unknown 610 38

References

MonoMap - Geology of the Heron Bay area, District of Thunder Bay

Publication Number: R218 Scale:     Date: 1982

Author: Muir T.L.

Publisher Name: Ontario Geological Survey

Location:


Map - Heron Bay, Thunder Bay District

Publication Number: M2439 Scale: 1:31,680    Date: 1981

Author: Muir T.L., Barnett E.S.

Publisher Name: Ontario Geological Survey

Location:


Report an Error

We are continuously updating our assessment file / technical report information. If you notice errors in the data, please contact us.


Terms of Use

Please review our Terms of Use agreement for this data product.


Ministry Contact Information

For detailed information regarding this mineral record please contact the Thunder Bay South Resident Geologist District Office