Ontario Geological Survey
Permanent Link to this Record:
MDI52H02NW00002
| Record Name(s) | Commerce Nickel - 1965, Disraeli Lake - 1965 |
|---|---|
| Related Record Type | Simple |
| Record Status | Occurrence |
| Date Created | 1980-Jan-30 |
| Date Last Modified | 2022-Jan-05 |
| Created By | Q Unknown |
| Revised By | Therese Pettigrew |
Primary Commodities: Copper
Secondary Commodities: Lead
Township or Area: Little Sturge Lake Area
Latitude: 49° 9' 46.68" Longitude: -88° 59' 18.62"
UTM Zone: 16 Easting: 355035 Northing: 5447476 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52H02NW
Point Location Description: General
Location Method: Conversion from MDI
Access Description: The occurrence is located approximately 2 km north northeast of the north end of Disraeli Lake. The property is accessible by and old logging road off the Mawn Lake road.
1965: Commerce Nickel Mines Ltd. conducted soil geochemistry, trenching and drilled 7 short drillholes. 2013: Pavey Ark Minerals Inc. conducted soil sampling, prospecting, sampling, and drilling with a portable core drill.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 52H02NW9557 | 20000005253 | 20000005253 |
| 2.54732 | 20000008063 | 20000008063 |
Province: Southern
Subprovince: Nipigon Basin
Formation Group: Sibley Group
Geological Age: Paleoproterozoic
Dec 07, 2005 (B Schnieders) - The initial discovery was made by Commerce Nickel Mines Ltd. in 1965. Copper mineralization (blue chalcocite) was found within a porous bed of Sibley stromatolite limestone. Minor amounts of galena and native copper were detected in some of the specimens. Float occurrence of the mineralized limestone are present, however diamond drilling failed to produce encouraging results (Coates, 1972). The area is underlain by algal limestone, dolomite and associated shale beds, as well diabase (Coatres, 1972). More recently mafic and ultra mafic intrusive rocks have been mapped at SeaGull and Disraeli Lake.
| Rock Type | Rank | Composition | Texture | Relationship | Dolostone | 1 | Host |
|---|
Jan 22, 2018 (Therese Pettigrew) - Cu-skarn mineralization in Proterozoic Sibley Group stromatolitic, dolostone at the contact with mafic-ultramafic intrusions of the Nipigon embayment (AFRI 20000008063). Mapping by Coates (1972) determined the property is underlain by sub-horizontal to shallow 5 degree east dipping algal stromatolitic dolostones, and calcareous shale of the Rossport Formation that has been intruded by diabase.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Chalcocite | Economic | Ore | ||||
| 2 | Copper | Economic | Ore | ||||
| 3 | Galena | Economic | Ore | ||||
| 4 | Malachite | Economic | Ore |
Jan 22, 2018 (J Scott) - Chalcocite/malachite in vugs within Sibley Grp stromatolitic limestone, Up to 1.57% Cu in grab samples collected by MNDM staff.
Jan 22, 2018 (Therese Pettigrew) - Commerce Nickel Mines Ltd. discovered chalcocite and malachite mineralization in surface outcrops of Sibley stromatolitic dolostone on the property and drilled 7 short Winkie holes that reportedly intersected 3.7-4.3 m of dolomitic rock in which 4 holes had copper mineralization visually estimated at 0.2 to 0.4% Cu in the upper half of the dolostone No assay results were reported (AFRI 20000005253). The best grab sample from the 2013 program returned an assay of 0.35% Cu. The best drill intersection from the 2013 program was DL13-4-1 which contained 26 cm of 1.04% Cu. Two other intersections of 94 and 99 cm contained 0.21% and 0.26% Cu respectively (AFRI 20000008063).
| Rank | Classification |
|---|---|
| 1 | Skarn |
Map - Disraeli Lake sheet, Thunder Bay District
Publication Number: M2235 Scale: 1:63,360 Date: 1971
Author: Coates M.E.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Mono - Copper, nickel, lead and zinc deposits of Ontario
Publication Number: MDC012 Scale: Date: 1969
Author: Shklanka R.
Publisher Name: Ontario Dept. of Mines
MonoMap - Geology of the Black Sturgeon River area, District of Thunder Bay
Publication Number: R098 Scale: Date: 1972
Author: Coates M.E.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
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