Ontario Geological Survey
Permanent Link to this Record:
MDI42C08SE00089
| Record Name(s) | Desjardins-Roy Property - 1983, Shunsby Group - 1943 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2001-May-24 |
| Date Last Modified | 2022-Sep-21 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: West
Latitude: 48° 18' 58.96" Longitude: -84° 8' 5.73"
UTM Zone: 16 Easting: 712401.53 Northing: 5355432.8 UTM Datum: NAD83
Resident Geologist District: Sault Ste. Marie
NTS Grid: 42C08SE
Point Location Description: Trenches south of powerline
Location Method: Based on Assessment
Access Description: The site is accessible by boat from Missanabie and then overland for approximately 300 m to the trenches.
1940-1950: M. Shunsby - trenching, stripping. 1971: Ontario Syndicate - airborne geophysics. 1983: Y. Desjardins and E. Roy - trenching, sampling. 1984: Cyr et al. - airborne geophysics. 1985-86: Loydex Resources Inc. - mapping, ground geophysics, soil geochemistry, 2 ddh (208 ft). 1987: Tenoga Consultants Inc. - airborne geophysics. 1987-88: New Beginnings Resources/Tundra Gold Mines Ltd. - IP survey, DD-19-7983 ft. 1992-93: Loydex Resources Inc. - channel sampling, mapping.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| WP Riggs.38 / OP93-002 | 42C08SE0013 | 42C08SE0013 |
| WP West.6 | 42C08SE0614 | 42C08SE0614 |
| WP Riggs.12 / 2.11094 | 42C08SE8673 | 42C08SE8673 |
| Bryuere 0012 / 2.548 | 42C08NE0052 | 42C08NE0052 |
| Finan 0036 / 2.7931 | 42C08NE0044 | 42C08NE0044 |
| West 0019A1 | 42C08SE0619 | 42C08SE0619 |
| West 0019B1 | 42C08SE0616 | 42C08SE0616 |
| West 0020A1/ 2.8834 | 42C08SE0613 | 42C08SE0613 |
| West 0020B1 / 2.8833 | 42C08SE0616 | 42C08SE0616 |
| West 0021A1 / 2.8869 | 42C08SE0610 | 42C08SE0610 |
| WP Riggs.38 / OP92-002 | 42C08SE0012 | 42C08SE0012 |
| WP West.7 | 42C08SE0603 | 42C08SE0603 |
| West 0021B1 / 2.8868 | 42C08SE0611 | 42C08SE0611 |
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Michipicoten
Geological Age: Neoarchean
Jul 23, 2013 (A Wilson) - The Dog Lake Deformation Zone (DLDZ) is located in the central part of Riggs and West townships, where it is defined by a 1.5 to 2.0 km wide southeast-trending zone of moderately to strongly strained rocks. The DLDZ is characterized by both ductile and brittle-ductile shear zones which occur in two dominant orientations 90-100 degrees and 110-120 degrees. Shear zones at these orientations within the mafic to intermediate metavolcanic rocks are defined by 1 to 50 m of chlorite-calcite and, rarely, chlorite-iron carbonate schists. Shear zones within feldspar and quartz-feldspar-porphyry intrusions are defined by quartz-sericite schist. Narrow NE and NW trending brittle and brittle-ductile shear zones are also observed with the DLDZ.
| Rock Type | Rank | Composition | Texture | Relationship | Intermediate Schist | 1 | Dacite | Schistose | Host |
|---|---|---|---|---|
| Feldspar Porphyry | 2 | Feldspar | Near | |
| Schist-Unsubdivided | 3 | Sericite | Host | |
| Mafic pillowed flow | 4 | Pillowed | Adjacent |
Jul 23, 2013 (A Wilson) - The property is underlain by sheared, pillowed metavolcanic rocks, tuff breccias, felsic crystal tuffs and feldspar porphyry sills and dikes. All units are cut by northwest trending diabase dikes. The shear zone strikes 110º and dips about 82º to the southwest. Mineralization is hosted within a quartz-carbonate shear zone which roughly parallels the strike of the regional volcanics. Gold occurs in the quartz-rich shear, as well as within weakly pyritized tuffs on either side of the shear zone.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Gangue | ||||
| 2 | Chalcopyrite | Economic | Gangue |
Jul 23, 2013 (A Wilson) - Grab samples collected by M. Shunsby in 1943 assayed 0.035 and 0.29 oz/t Au over 12 inches of the shear zone. A quartz lens located 12 feet to the north assayed 0.65 oz/t Au over 24 inches. Grab samples collected in 1983 by a variety of samplers returned assays of 0.113 oz/t Au, 0.05 oz/t Au, 0.2 oz/t Au, 0.58 oz/t Au over 1 ft, 0.24 oz/t Au over 8 inches. Grab samples collected by the OGS in 1983 returned assays of 2.40 oz/t Au, and other grab samples had assays ranging between 0.11 and 0.46 oz/t Au. The best assays obtained from the drill program completed by New Beginnings Resources was in 1988 returned values of 0.07oz/t Au over 2.5 ft. The best assays were obtained from 35 cm wide zones containing stringers of quartz, carbonate, pyrite and chalcopyrite. Grab samples collected from a trench in 1984 returned values ranging from 0.005 oz/t Au over 3 ft to 0.05 oz/t Au over 2 ft. Samples collected from the same trench by Noranda in 1985 returned values ranging from 0.004 oz/t Au over 1.2 m to 1.42 oz/t Au over 0.15m.
| Rank | Characteristic |
|---|---|
| 1 | Sheared |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Unknown | 20 | 110 | 82 |
Article - Sault Ste. Marie Resident Geologist area, Northeastern Region
Publication Number: MP122.008 Page: 224 Date: 1997
Author: Bennett G., Leahy E.J., Booth K.D.
Publisher Name: Ontario Geological Survey
Location:
Article - The geological and structural setting of gold mineralization in the Missanabie-Renabie District of the Michipicoten greenstone belt, Wawa, Ontario
Publication Number: MP141.037 Page: 257-270 Date: 1997
Author: Heather K.B., Buck S.
Publisher Name: Ontario Geological Survey
Location:
Map - Riggs and West townships, Algoma District
Publication Number: M2353 Scale: 1:31,680 Date: 1977
Author: Srivastava P., Bennett G., Elmhirst F., Andrews M.D.
Publisher Name: Ontario Geological Survey
Location:
Map - Geological series, Missanabie area, West Township, formerly Township 46, District of Algoma
Publication Number: P0945 Scale: 1:15,840 Date: 1974
Author: Srivastava P., Bennett G., Elmhirst F., Andrews M.D.
Publisher Name: Ontario Division of Mines
Location:
MonoMap - Geology of Riggs and West townships, District of Algoma
Publication Number: R174 Date: 1978
Author: Srivastava P., Bennett G.
Publisher Name: Ontario Geological Survey
Location:
Map - Precambrian Geology Compilation Series - White River Sheet
Publication Number: M2666 Scale: 1:250,000 Date: 2001
Author: Santaguida F.
Publisher Name: Ontario Geological Survey
Location:
Part - Geology of Township 47 [Riggs Township], Missinaibi area
Publication Number: ARV54-04 Date: 1997
Author: Bruce E.L.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Preliminary report on recent developments in the Missinaibi area
Publication Number: PR1943 Page: 5 Date: 1998
Author: Horwood H.C.
Publisher Name: Ontario Dept. of Mines
Location:
We are continuously updating our assessment file / technical report information. If you notice errors in the data, please contact us.
Please review our Terms of Use agreement for this data product.
For detailed information regarding this mineral record please contact the Sault Ste. Marie Resident Geologist District Office