Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI42C03SW00016

Record: MDI42C03SW00016

General

Mineral Record Identification
Record Name(s) Millard Zone - 1984
Related Record Type Simple
Related Record(s)
Record Status Occurrence
Date Created 1991-Jan-08
Date Last Modified 2022-Sep-13
Created By
Revised By

Commodities

Primary Commodities: Gold



Location

Township or Area: Mishibishu Lake Area

Latitude: 48° 6' 27.68"    Longitude: -85° 26' 17.43"

UTM Zone: 16    Easting: 616260.89   Northing: 5329449.29    UTM Datum: NAD83

Resident Geologist District: Sault Ste. Marie

NTS Grid: 42C03SW

Point Location Description: Muscocho drill collars west of Macassa Creek

Location Method: Based on Assessment

Access Description: Drive west along highway 17 from the junction of highway 17 and 101 for approximately 50 km to the Paint Lake Road (a gravel road heading south from highway 17). Drive south along the gravel road for approximately 50 km to the turnoff to the Granges property. The site is accessible by overland traverse from this site.



Exploration History

1983-84: Westfield Minerals Ltd. - mapping, ground geophysics, geochemistry, diamond drilling (1 ddh). 1985-86: Muscocho Explorations Ltd. - diamond drilling (20 ddh, 10 775 ft). 1994 - MacMillan Gold Corp. and Granges Inc. - airborne geophysics.


Assessment Work on File

Assessment Work on File
Office File Number Online Assessment File Identifier Online Assessment File Directory
WPMISHI LAKE.16
WPMISHI LAKE.17
WP Mishibishu Lake.8 42C03SW0088 42C03SW0088
WP Mishibishu Lake.42 42C03SE2001 42C03SE2001
MISHI LAKE 30

Geology

Province: Superior

Subprovince: Wawa

Terrane: Wawa-Abitibi

Belt: Michipicoten

Tectonic Assemblage: Catfish

Geological Age: Neoarchean   Geochronological Age: 2.7 GA   Geochron. Age Ref.: GOO VOL 1



Geology Comments

Dec 07, 2005 (A Wilson) - All of the mineralized zones occur in the most highly strained portion of the Mishibishu Deformation Zone. The tectonic-stratigrapy strikes at 115 and dips at 45 degrees north. The Magnacon mineralized zone has a chlorite dominated structural hanging wall and a sericite dominated structural footwall. The Mishibishu Deformation zone is the largest of the deformation zones in the belt, measuring approximately 40 km in length and several hundred metres up to 1.5 km in width. The zone is located north of the Mishibishu Lake Stock and lies along the lithological contact of mafic metavolcanic rocks to the north (hanging wall) with clastic metasediments to the south (footwall) The Western MDZ is that portion of the deformation zone west of Macassa Creek. The Millard Zone is that portion of the Muscocho ground that lies west of Macassa Creek and the western property boundary. Macassa Creek is interpreted to be a NNE trending ductile shear zone that has been faulted.




Lithology

Lithology Data
Rock Type Rank Composition Texture Relationship
Vein 1 Quartz Host
Intermediate Tuff 2 Sheared Tuffs Host
Schist-Unsubdivided 3 Quartz-Sericite Host

Lithology Comments

Dec 07, 2005 (A Wilson) - The host rocks apears to be an intermediate-mafic schist. It is difficult to determine the correlation between the Millard Zone and the Curtis Zone (lying to the east) due to the geological complexity associated with Macassa Creek. Macassa Creek appears to be a sinistral-ductile shear zone which experienced brittle-dextral movement. The lithologies show a decreasing degree of deformation and alteration westward from Macassa Creek.




Mineralization

Mineralization and Alteration
Rank Mineral Name Class Economic Mineral Type Alteration Mineral Type Alteration Ranking Alteration Intensity Alteration Style
1GoldEconomicOre
1PyriteEconomicGangue
2FuchsiteEconomicGangue
3ChalcopyriteEconomicGangue
4TourmalineEconomicGangue
5ArsenopyriteEconomicGangue

Mineralization Comments

Dec 07, 2005 (A Wilson) - Diamond drilling completed by Westfield in 1984, intersected 1.2 ft at 0.287 oz/t Au and 3 ft at 0.05 oz/t Au. Diamond drilling competed by Muscocho in 1986 intersected elevated gold values in intermediate schist and quartz-sericite schist. The highest values were 0.25 oz/t Au over 1.0 ft.



Mineral Record Details

Characteristics
Rank Characteristic            
1 Sheared

Mineral Zones - Size and Shape

Rank: 1       Structure Type: Shear

Zone Name: Detour Lake - Rank 1
Shape Length Thickness Depth Strike Dip Plunge Trend Age Reference
Irregular 150

References

File - Resident Geologist files WP Mishibishu Lake.16, WP Mishibishu Lake.17, Mishibishu Lake 0030

Publication Number: Date:

Author:

Publisher Name:

Location: SSM RGP office


Map - Geological series, Precambrian geology, Mishibishu Lake area, northeastern section, districts of Thunder Bay and Algoma

Publication Number: P2970 Scale: 1:15,840    Date: 1986

Author: Bowen R.P., Logothetis J., Heather K.B.

Publisher Name: Ontario Geological Survey

Location:


Map - Marginal notes, Mishibishu Lake area

Publication Number: P3184 Date: 1992

Author: Reid R.G., Bowen R.P., Heather K.B., Logothetis J., Reilly B.A.

Publisher Name: Ontario Geological Survey

Location:


Article - Gold showings of the Mishibishu Lake area, Thunder Bay District

Publication Number: MP126.015S Page: 85-86  Date: 1997

Author: Heather K.B.

Publisher Name: Ontario Geological Survey

Location:


Map - Precambrian geology, Mishibishu Lake area, Mishibishu Lake sheet

Publication Number: P3152 Scale: 1:15,840    Date: 1992

Author: Reid R.G., Bowen R.P., Heather K.B., Logothetis J., Reilly B.A.

Publisher Name: Ontario Geological Survey

Location:


Map - University River, Algoma and Thunder Bay districts

Publication Number: M2333 Scale: 1:63,360    Date: 1976

Author: Bennett G., Thurston P.C., Giguere J.F.

Publisher Name: Ontario Division of Mines

Location:


Map - Operation Pukaskwa, University River sheet, districts of Thunder Bay and Algoma

Publication Number: P0507 Scale: 1:63,360    Date: 1997

Author: Bennett G., Thurston P.C., Giguere J.F.

Publisher Name: Ontario Dept. of Mines

Location:


Mono - Geology, structure and economic geology of the Mishibishu Lake area

Publication Number: OFR5774 Page: 192-210  Date: 1991

Author: Reid R.G., Bowen R.P., Reilly B.A., Logothetis J., Heather K.B.

Publisher Name: Ontario Geological Survey

Location:


Article - Mineralization of the Mishibishu Lake greenstone belt

Publication Number: MP132.059 Page: 234-235  Date: 1997

Author: Heather K.B.

Publisher Name: Ontario Geological Survey

Location:


Map - Operation Pukaskwa, districts of Algoma and Thunder Bay

Publication Number: P0541 Scale: 1:126,720    Date: 1997

Author: Bennett G., Thurston P.C., Giguere J.F.

Publisher Name: Ontario Dept. of Mines

Location:


Map - Mishibishu Lake area, District of Thunder Bay, Ontario

Publication Number: ARM49J Scale: 1:63,360    Date: 1997

Author: Evans E.L.

Publisher Name: Ontario Dept. of Mines

Location:


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For detailed information regarding this mineral record please contact the Sault Ste. Marie Resident Geologist District Office