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Ontario Geological Survey
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MDI42D14SW00013
| Record Name(s) | Copper Island - 1922 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1991-Apr-01 |
| Date Last Modified | 2022-May-09 |
| Created By | |
| Revised By |
Primary Commodities: Copper
Township or Area: Copper Island Area
Latitude: 48° 46' 12.6" Longitude: -87° 22' 32.04"
UTM Zone: 16 Easting: 472404 Northing: 5401975 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42D14SW
Point Location Description: AMIS adit location
Location Method: Data Compilation
Access Description: Copper Island is located in Lake Superior approximately 9.5 km southeast of Rossport (claim map G-588, Copper Island). Access is by aircraft or boat.
Pre-1921: T.L. Tanton reported the occurrence of copper on Copper Island. 1964: A claim group(s) was staked by N. Michano and E. Erlich and all interest was transferred to Mentor C Addicks. 1965: No work was recorded and the claims lapsed. 1969: A claim group was staked by W.P. Eden and A. Hopkins and all interest was transferred to D.L.I. Smith. Additional claims were staked by A. Hopkins. 1970: The Smith claims lapsed, as no work was recorded. 1971: The Hopkins claims lapsed, as no work was recorded. There is an adit 1.5 m long by 1.8 m wide that extends approximately 1.5 m back into the hill. No assessment reports were found on file.
Province: Southern
Supergroup: Keweenawan Supergroup
Geological Age: Paleoproterozoic
Dec 07, 2005 (B Nelson) - Hopkins (1922) noted: According to T.L. Tanton, small amounts of native copper occur in veinlets and amygdules in the Keweenawan lavas on the northwest shore of Copper Island. However, Giguere (1975, p.26) noted that: ...no copper was located here (Copper Island) during the present (1975) survey. According to Giguere (1975, p. 26) local deposits occur as copper-chalcocite carbonate veins or as amygdules of native copper associated with prehnite, calcite and chlorite vesicle fillings.
| Rock Type | Rank | Composition | Texture | Relationship | Mafic lava flow-unsubdivided | 1 | Unspecified Keweenawan Lava | Host |
|---|
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Copper | Economic | Ore | ||||
| 2 | Chalcocite | Economic | Ore | ||||
| 1 | Prehnite | Economic | Gangue | ||||
| 2 | Calcite | Economic | Gangue | ||||
| 3 | Chlorite | Economic | Gangue |
Dec 07, 2005 (B Nelson) - Hopkins (1922) noted: According to T.L. Tanton, small amounts of native copper occur in veinlets and amygdules in the Keweenawan lavas on the northwest shore of Copper Island. However, Giguere (1975, p.26) noted that: ...no copper was located here (Copper Island) during the present (1975) survey.
Dec 07, 2005 (B Nelson) - Unknown.
Map - Nipigon-Schreiber, geological compilation series, Thunder Bay District
Publication Number: M2232 Scale: 1:253,440 Date: 1973
Author: Carter M.W., McIlwaine W.H., Wisbey P.A.
Publisher Name: Ontario Division of Mines
Location:
MonoMap - Geology of St. Ignace Island and adjacent islands, District of Thunder Bay
Publication Number: R118 Page: 26 Date: 1975
Author: Giguere J.F.
Publisher Name: Ontario Division of Mines
Location:
Part - Schreiber-Duck Lake area
Publication Number: ARV30-04.001 Page: 11 Date: 1998
Author: Hopkins P.E.
Publisher Name: Ontario Dept. of Mines
Location:
File - Resident Geologist Mineral Deposit Files
Publication Number: Min Dep Date:
Author:
Publisher Name:
Location: Thunder Bay RGP
Map - St. Ignace Island and adjacent islands, Thunder Bay District
Publication Number: M2285 Scale: 1:63,360 Date: 1974
Author: Giguere J.F.
Publisher Name: Ontario Division of Mines
Location:
Mono - Mineral Occurrences in the Nipigon-Marathon Area, Volumes 1 and 2.
Publication Number: OFR5951 Page: 528-529 Date: 1996
Author: Schnieders B.R., Smyk M.C., Speed A.A., McKay D.B.
Publisher Name: Ontario Geological Survey
Location:
Map - Schreiber-Duck Lake area, District of Thunder Bay
Publication Number: ARM30A Scale: 1:63,360 Date: 1998
Author: Hopkins P.E., Tanton T.L.
Publisher Name: Ontario Dept. of Mines
Location:
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For detailed information regarding this mineral record please contact the Thunder Bay South Resident Geologist District Office