Ontario Geological Survey
Permanent Link to this Record:
MDI000000001870
| Record Name(s) | Semple-Hulbert - 2008 |
|---|---|
| Related Record Type | |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2015-Nov-23 |
| Date Last Modified | 2023-Apr-18 |
| Created By | |
| Revised By |
Primary Commodities: Platinum, Palladium, Cobalt
Secondary Commodities: Nickel, Gold, Copper
Township or Area: East Of Croal Lake Area, Croal Lake Area
Latitude: 53° 32' 38.31" Longitude: -87° 44' 24.88"
UTM Zone: 16 Easting: 450949 Northing: 5933041 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 43E12SE, 43E12SW
Point Location Description: DDH SH11-04 collar, MacDonald Mines news release Nov 14, 2011
Location Method: Based on Assessment
Access Description: Access by float plane or helicopter
2008: Staked by MacDonald Mines, who conducted airborne geophysics. 2011: MacDonald Mines conducted prospecting, ground geophysics, downhole EM Pulse geophysics, and drilled 9 DDH totaling 2553.9 m.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.50282 | 20000007013 | 20000007013 |
Province: Superior
Subprovince: Sachigo
Terrane: North Caribou
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Gabbro | 1 | Olivine | Magnetic | Host |
|---|
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 3 | Chalcopyrite | Economic | Ore | ||||
| 4 | Pentlandite | Economic | Ore | ||||
| 5 | Magnetite | Economic | Ore | ||||
| 1 | Olivine | Economic | Gangue | ||||
| 2 | Pyrrhotite | Economic | Gangue | ||||
| Serpentine | Alteration | Serpentinization | 1 | Unknown | Disseminated |
Nov 23, 2015 (Therese Pettigrew) - Ultramafic intrusive environment consisting of alternating serpentinized ultramafic-gabbroic rocks within each zone, with the frequency of gabbroic rocks increasing to the north. The most notable units discovered have proven to be numerous vanadium-rich magnetite gabbro layers (near massive magnetite locally) with robust apparent thicknesses ranging from 20-40 metres. Additionally, gabbroic units containing strong sulphide zones with semi-massive to massive sulphides of 1 to 2 metres in thickness have been encountered, with the margins of these zones consisting of sulphide stringers containing visible pyrrhotite, chalcopyrite and lesser pentlandite. Zones of platinum, palladium and gold (Pt, Pd and Au) enrichment were identified within the mafic intrusive body. Diamond drill hole SH11-08 assayed 0.703 g/T Pd, 0.276 g/T Pt and 0.344 g/T Au from 215.65-216 m. Elevated nickel and cobalt (most notably SH11-04 which assayed up to 1610 parts per million (ppm) Ni and 1040 ppm Co, and SH11-05 which assayed up to 1160 ppm Ni) was found associated with disseminations of pyrrhotite and inter-grown pentlandite. Elevated copper assays (most notably SH11-02 and SH11-06 which assayed up to 1.04% Cu and 0.88% Cu respectively) (MacDonald Mines website http://www.macdonaldmines.com/index.php?option=com_content&view=article&id=102&Itemid=106, MacDonald Mines press release Nov. 14, 2011). Diamond drill hole SH11-04 assayed 0.607g/T Pd and 0.325g/T Pt, from 212-215 m: 0.153g/T Pd and 0.041g/T Pt, from 230-233 m; 0.272g/T Pd and 0.142g/T Pt, from 254-257 m; 0.817g/T Pd, 0.231g/T Pt and 0.33 g/T Au, from 262-263 m (MacDonald Mines press release Nov. 14, 2011).
| Rank | Classification |
|---|---|
| 1 | VMS Base Metal |
| Rank | Characteristic |
|---|---|
| 1 | Intrusive |
| 1 | Layered |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Unknown | 700 |
Publication - MacDonald Mines Semple-Hulbert website - http://www.macdonaldmines.com/index.php?option=com_content&view=article&id=102&Itemid=106
Publication Number: Web1 Date: 2011
Author: MacDonald Mines
Publisher Name: MacDonald Mines
Location: http://www.macdonaldmines.com/
Publication - MacDonald Mines Nov 14, 2011 news release
Publication Number: News Release Date: 2011
Author: MacDonald Mines
Publisher Name: MacDonald Mines
Location: http://www.macdonaldmines.com
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 Thunder Bay North Resident Geologist District Office