Ontario Geological Survey
Permanent Link to this Record:
MDI42C03SW00005
| Record Name(s) | Amichi Showing - 1949, Westfield Property - 1980, Amichi Prospect - 1971 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1983-Sep-12 |
| Date Last Modified | 2022-Sep-27 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Mishibishu Lake Area
Latitude: 48° 5' 31.52" Longitude: -85° 23' 46.93"
UTM Zone: 16 Easting: 619408.9 Northing: 5327779.33 UTM Datum: NAD83
Resident Geologist District: Sault Ste. Marie
NTS Grid: 42C03SW
Point Location Description: Trenches and drill holes on west side of 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 55 km to the Eagle River Mill site. The showing is located approximately 2 km SE of the mill.
1938: Haultain - prospecting, property optioned to Macassa Mines. 1938: Holinger Consolidated Gold Mines Ltd. - trenching, stripping, diamond drilling. 1945: Bishu Mines Ltd. (Amichi Gold Mines Ltd). - purchased claims from C. F. Haultain; additional claims staked. 1949: Bishu Mines Ltd. (Amichi Gold Mines Ltd.) - acquires 17 additional claims from A. B. Johnston. 1945-51 - Amichi Gold Mines Ltd. - prospecting, trenching, 15 ddh (1153 m), mapping. 1973: Asarco Exploration Co. - airborne geophysics. 1981-85: Westfield Minerals Ltd. and St. Fabien Exploration Inc. - geochemistry, ground geophysics, mapping, 23 ddh (10 637 ft). 1983: MacMillan Energy - airborne geophysics. 1985: Muscocho Exploration - property acquisition. 1994: MacMillan Gold Corp. and Granges Inc. - airborne geophysics. 2000: River Gold Mines Ltd. - property acquired.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| Mishibishu Lake 0017 | 42C03SW0116 | 42C03SW0116 |
| Mishibishu Lake 0022 | 42C03SW0103 | 42C03SW0103 |
| Mishibishu Lake 0016-A1 | 42C03SW8767 | 42C03SW8767 |
| Mishibishu Lake 0014 | 42C03SW0120 | 42C03SW0120 |
| Mishibishu Lake 0010-B1 | 42C03SW0125 | 42C03SW0125 |
| Mishibishu Lake 0010-A11 | 42C03SW0126 | 42C03SW0126 |
| WP Mishibishu Lake.42 | 42C03SE2001 | 42C03SE2001 |
| Groseilliers-0015 | 42C03SE0013 | 42C03SE0013 |
| Mishibishu Lake 0023 | 42C03SW0109 | 42C03SW0109 |
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 Mishibishu Deformation Zone (MDZ) is the largest of the deformation zones int he 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 and clastic metasediments to the south. The central MDZ has the highest degree of strain intensity and alteration within the belt. Shear zones are broad and exhibit pervasive deformation and alteration. Mafic metavolcanics in the hanging wall become progressively more strained and altered with increasing proximity to the centre of the zone. Conglomerate clasts are attenuated and only the most competent clasts are discernable from matrix. An intense penetrative foliation strikes approximately 300 and a well developed stretching lineation plunges moderately to the N and NE. The Amichi occurrence is localized along a subsidiary deformation zone south of the main MDZ.
| Rock Type | Rank | Composition | Texture | Relationship | Vein | 1 | Quartz | Host |
|---|---|---|---|---|
| Terrigenous-Clastic-Unsubdivided | 2 | Arkose, Wacke, Argillite | Sheared | Host |
Dec 07, 2005 (A Wilson) - The vein is hosted within a narrow zone of strongly deformed and altered arkoses, wackes and argillites. These schists contain various amounts of chlorite, quartz, sericite, ankerite, calcite, pyrite, green mica and hematite. Locally these schists are strongly crenulated and drag folded. Gold mineralization occurs in the quartz vein as visible gold associated with pyrite and variable amounts of ankerite, sericite and chlorite.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Gold | Economic | Ore | ||||
| 1 | Pyrite | Economic | Gangue | ||||
| 2 | Galena | Economic | Gangue | ||||
| 3 | Chalcopyrite | Economic | Gangue | ||||
| Chlorite | Alteration | Chloritic | 1 | Medium | Replacement | ||
| Sericite | Alteration | Sericitization | 2 | Medium | Replacement | ||
| Ankerite | Alteration | Carbonatization | 3 | Strong | Replacement |
Dec 07, 2005 (A Wilson) - Various grab samples collected by Amichi Gold Mines returned values ranging from 0.19 oz/t Au over 107 cm to 1.92 oz/t Au over 86 cm. Channel samples collected by Westfield in 1982 returned assays of 0.22 oz/t Au over 28 cm; 0.51 oz/t Au over 20 cm; 0.28 oz/t Au over 30 cm; 0.16 oz/t Au over 46 cm. Westfield took 4, 10 lb samples across the Amichi Vein, the best assay returned 0.51 oz/t Au over 8 inches.
| Rank | Characteristic |
|---|---|
| 1 | Sheared |
| 2 | Vein |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Regular | 260 | 50 | 310 |
Date: Oct 15, 2001
Geologist: A Wilson
Notes: The vein has a variable dip. It dips at 30 in the west and 60 to the east. The vein shows little carbonate alteration, but has prominent fuchsite.
File - Resident Geologist files Mishibishu Lake 0020, St. Germain-0010
Publication Number: Date:
Author:
Publisher Name:
Location: SSM RGP office
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 - 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 - 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:
Folio - Mishibishu Lake area, Sault Ste. Marie Mining Division, NTS No. 42C/03SW
Publication Number: GDIF597 Date: 1997
Author: Wawa RGO
Publisher Name: Ontario Geological Survey
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:
Part - Geology of the Mishibishu Lake area
Publication Number: ARV49-09 Page: 12 Date: 1997
Author: Evans E.L.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Gold deposits of Ontario, part 1, districts of Algoma, Cochrane, Kenora, Rainy River, and Thunder Bay
Publication Number: MDC013 Page: 288-289 Date: 1971
Author: Ferguson S.A., Groen H.A., Haynes R.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
MonoMap - Geology of the Pukaskwa River-University River area, districts of Algoma and Thunder Bay
Publication Number: R153 Page: 45-46 Date: 1977
Author: Bennett G., Thurston P.C.
Publisher Name: Ontario Division of Mines
Location:
Article - Gold showings of the Mishibishu Lake area, Thunder Bay District
Publication Number: MP126.015S Page: 88 Date: 1997
Author: Heather K.B.
Publisher Name: Ontario Geological Survey
Location:
Mono - Wawa mineral deposits data base
Publication Number: OFR5775 Page: 286 Date: 1991
Author: Frey E.D., Stewart R.C.
Publisher Name: Ontario Geological Survey
Location:
Mono - Geology, structure and economic geology of the Mishibishu Lake area
Publication Number: OFR5774 Page: 142-143, 219-220 Date: 1991
Author: Reid R.G., Bowen R.P., Reilly B.A., Logothetis J., Heather K.B.
Publisher Name: Ontario Geological Survey
Location:
Book - Sudbury Timmins Algoma Mineral Program, Project 1: mineral inventory of the Sudbury-Timmins-Sault Ste. Marie region, Ontario
Publication Number: GSC OF 1087 Page: 90 Date: 1985
Author: Rose, D. G.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/129999
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