Ontario Geological Survey
Permanent Link to this Record:
MDI42C03SW00050
Record Name(s) | Dorset Shear - 1989 |
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Related Record Type | Simple |
Related Record(s) | |
Record Status | Prospect |
Date Created | 2001-Oct-26 |
Date Last Modified | 2022-Sep-13 |
Created By | |
Revised By |
Primary Commodities: Gold
Township or Area: Mishibishu Lake Area
Latitude: 48° 2' 18.92" Longitude: -85° 25' 40.77"
UTM Zone: 16 Easting: 617175.61 Northing: 5321784.81 UTM Datum: NAD83
Resident Geologist District: Sault Ste. Marie
NTS Grid: 42C03SW
Point Location Description: Trenched area MLT-89-05 between Bonnema Bog and Connelly Lake
Location Method: Based on Assessment
Access Description: The property is accessible via the Eagle River Mine Road. This site is located approximatley 35 to 45 km south on the Eagle River Mine road and then overland by a skidder road and ATV trails.
1987: San Paulo Exploration Ltd. - airborne geophysics. 1988-90: Noranda Exploration Co Ltd. - trenching, diamond drilling, stripping. 1996-98: Murgor Resources Inc. - prospecting, sampling, compilation, ground geophysics, trenching, mapping, 14 ddh (1496.5 m). 1998-99: Battle Mountain Gold - 18 ddh (4298 m), trenching, geochemistry.
Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
---|---|---|
WP Mishibishu Lake.57 | 42C03SW2007 | 42C03SW2007 |
WP Mishibishu Lake.58 | 42C03SW2003 | 42C03SW2003 |
WP Mishibishu Lake.59 | 42C03SW2004 | 42C03SW2004 |
WP Mishibishu Lake.60 | 42C03SW2006 | 42C03SW2006 |
WP Mishibishu Lake.62 | 42C03SW2008 | 42C03SW2008 |
WP Mishibishu Lake.46 | 42C04SE0025 | 42C04SE0025 |
WP Mishibishu Lake.32 | 42C03SW0056 | 42C03SW0056 |
WP Mishibishu Lake.10 | 42C03SW0080 | 42C03SW0080 |
WP Mishibishu Lake.56 | 42C03SW2002 | 42C03SW2002 |
WP Mishibishu Lake.55 | 42C03SW0049 | 42C03SW0049 |
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
Dec 07, 2005 (A Wilson) - The strike length of the RLDZ is 8 km and the maximum width is 1 km. The RLDZ is centred within a clastic metasedimentary rock sequence which exhibits sheared contacts with felsic intrusive rocks to the north and mafic metavolcanics to the south. The style of deformation and alteration observed in the RLDZ is similar to, yet not as intensely developed as the MDZ. The penetrative foliation strikes 285, dips moderately steeply to the north. Variable trending, moderately to steeply plunging stretchin lineations are commonly obscured or overprinted by crenulation lineattions. The RLDZ possesses structural characteristics similar to the other deformation zones in the belt. Felsic intrusive dikes/sills are common and concentrated within the central and northern parts of the zone, ranging in thickness from centimetres to several hundred metres.
Rock Type | Rank | Composition | Texture | Relationship | Schist-Unsubdivided | 1 | Chlorite-Sericite | Host |
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Mafic lava flow-unsubdivided | 2 | Hanging Wall | ||
Terrigenous-Clastic-Unsubdivided | 3 | Silstone | Footwall |
Dec 07, 2005 (A Wilson) - The occurrence consists of an easterly-trending intercalated sequence of mafic to felsic to intermediate volcanic rocks, clastic metasedimentary rocks and siliceous lean iron formation. The volcanic rocks comprise massive flows with minor tuffaceous horizons. The clastic sedimentary rocks include greywackes and minor conglomerate. The shear zones and deformation zones are located along lithologic contacts.
Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
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1 | Gold | Economic | Ore | ||||
1 | Pyrite | Economic | Gangue | ||||
2 | Arsenopyrite | Economic | Gangue | ||||
3 | Pyrrhotite | Economic | Gangue | ||||
4 | Chalcopyrite | Economic | Gangue | ||||
Silica | Alteration | Silicification | 1 | Strong | Replacement | ||
Ankerite | Alteration | Carbonatization | 2 | Strong | Replacement | ||
Albite | Alteration | Albitization | 3 | Strong | Replacement |
Dec 07, 2005 (A Wilson) - Channel sampling by Murgor Resources has returned the following assays: 2.67 g/t Au over 12.5 m including 4.82 g/t Au over 4.2 m; 3.66 g/t au over 10.6 m, including 6.19 g/t Au over 2.1m. Diamond drilling returned the following intersections: 0.11 oz/t Au over 72 ft, including 18 ft grading 0.17 oz/t Au; 0.05 oz/t au over 87; including 19 ft @ 0.12 oz/t Au. Gold mineralization occurs in albitized-carbonatized-sulphidized shear zones. The gold appears to be strongly associated with albite and pyrite-arsenopyrite content. Visible gold mineralziation can occur within discrete-late quartz veins, which often cross cut the entire zone.
Rank | Characteristic |
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1 | Sheared |
2 | Stratabound |
Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
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Regular | 4000 | 285 | 55 | 60 |
File - Resident Geologist files WP Mishibishu Lake.41
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 - 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 - 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:
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 - 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 - 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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