Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI000000003737

Record: MDI000000003737

General

Mineral Record Identification
Record Name(s) Mile 23 - 1984
Related Record Type
Related Record(s)
Record Status Discretionary Occurrence
Date Created 2024-Mar-05
Date Last Modified 2024-Mar-05
Created By
Revised By

Commodities

Primary Commodities: Copper



Location

Township or Area: Longlegged Lake Area

Latitude: 50° 43' 9.71"    Longitude: -93° 52' 12.94"

UTM Zone: 15    Easting: 438567   Northing: 5618979    UTM Datum: NAD83

Resident Geologist District: Red Lake

NTS Grid: 52K12NW

Point Location Description: Compiled from OFR5943 on p.73

Location Method: Data Compilation

Access Description: Access is available by Highway 804 northwest of Ear Falls, then to Longlegged Lake forest access road, then to Mile 23 road.



Geology

Province: Superior

Subprovince: Uchi



Lithology

Lithology Data
Rock Type Rank Composition Texture Relationship
Mafic lava flow-unsubdivided 1
Mafic pillowed flow 2
Intermediate flow breccia 3
Diorite 4

Lithology Comments

Mar 05, 2024 (Paul Malegus) - March 5, 2024 (P. Malegus) - The property is underlain by massive to pillowed, amphibolitized and garnet-bearing mafic flows. A 200 m wide band of mafic flows, in contact with a narrow felsic to intermediate fragmental unit to the south, outcrops on the property. Small scale folding, pronounced foliation and gneissic textures affect all lithological units (Atkinson, B.T. and Storey, C.C. 1996. Report of Activities 1995, Resident Geologists, OFR 5943).




Mineralization

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

Mineralization Comments

Mar 05, 2024 (Paul Malegus) - March 5, 2023 (P. Malegus) - Two areas of mineralization have been identified. The South Zone consists of of a newly excavated trench measuring 1 m wide by 1 m deep by 5 m in length blasted in rusty, amphibolitized, course-grained mafic flows. Pyrrhotite and chalcopyrite occur as narrow seams and disseminations which comprise 1 to 20% of the rock. Mineralization is oriented 160/85 deg. E, in contrast to the regional foliation which trends 020 to 030 deg. Sulphide content varies directly with the amount of garnet present in the rock. A second trench, referred to as the North Zone, is located several hundred metres to the northeast of the South Zone. The North Zone consists of a 3 m wide band of silicified, pillowed mafic flows adjacent to thinly banded, intermediate fragmental metavolcanics and massive, medium-grained diorite. Foliation of the rocks at the North Zone is oriented at 030/85 deg. E. Minor pyrite and pyrrhotite mineralization imparts a rusty weathering to the rocks (Atkinson, B.T. and Storey, C.C. 1996. Report of Activities 1995, Resident Geologists, OFR 5943).



Mineral Record Details

Mineral Zones - Size and Shape

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

References

Mono - Report of Activities 1995, Resident Geologists

Publication Number: OFR5943 Page: 73  Date: 1996

Author: Baker C.L., Fyon J.A., Laderoute D.G., Newsome J.W.

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