Ontario Geological Survey
Permanent Link to this Record:
MDI000000001786
| Record Name(s) | Leigh - 2001 |
|---|---|
| Related Record Type | |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 2014-Oct-27 |
| Date Last Modified | 2022-Feb-23 |
| Created By | |
| Revised By |
Primary Commodities: Nickel, Platinum Metals
Secondary Commodities: Copper
Township or Area: Garden Lake Area
Latitude: 49° 37' 15.29" Longitude: -89° 53' 4.17"
UTM Zone: 16 Easting: 291670 Northing: 5500480 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52H12NW
Point Location Description: Mineralized boulders
Location Method: Data Compilation
Access Description: The Leigh occurrence is located approximately 2 km southwest of Highway 811 and can be accessed via a trail.
2001: Prospecting, trenching, ground magnetic and electromagnetic surveys, and soil geochemistry surveys by Berland Resources Ltd. 2002: Soil geochemical survey by Lithic Resources Ltd. 2003: Induced polarization survey, bedrock and soil sampling and diamond drilling by North American Palladium Ltd. 2010: Airborne magnetic and electromagnetic surveys by Ringbolt Ventures Ltd.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.20983 | 52H12NW2001 | 52H12NW2001 |
| 2.22964 | 52H12NW2002 | 52H12NW2002 |
| 2.22861 | 52H12NW2003 | 52H12NW2003 |
| 2.24738 | 52H12NW2004 | 52H12NW2004 |
| 2.25956 | 52H12NW2005 | 52H12NW2005 |
| 2.26728 | 52H12NW2006 | 52H12NW2006 |
| 2.28328 | 52H12NW2007 | 52H12NW2007 |
| 2.28329 | 52H12NW2008 | 52H12NW2008 |
| 2.25849 | 41I11NE2008 | 41I11NE2008 |
| 2.45507 | 20000006306 | 20000006306 |
Province: Superior
Subprovince: Wabigoon
Geological Age: Archean
Dec 18, 2020 (Therese Pettigrew) - The property is underlain by the Neoarchean Roaring River complex, a crescent-shaped intrusion 70 km long and 1 to 15 km wide. It consists of a variety of plutonic rocks, including diorite, monzodiorite, monzonite, quartz monzodiorite and granodiorite, all of sanukitoid affinity; gabbroic and pyroxenitic rocks are found as mega-inclusions in these aforementioned phases. The property, covering the area of highest magnetic intensity of the intrusive complex, is underlain predominantly by poorly exposed gabbroic rocks (Schnieders et al., 2002).
| Rock Type | Rank | Composition | Texture | Relationship | Gabbro | 1 |
|---|
Dec 18, 2020 (Mark Puumala) - The following description of the Leigh showing is provided by Schnieders et al. 2002 OFR6081): The Leigh showing consists of numerous mineralized boulders whose size, angularity and similarity suggest local derivation from bedrock. The predominant rock type is a coarse-grained, equigranular, hornblende monzogabbro with approximately equal proportions of hornblende and pink feldspar. There are no visible xenoliths nor dikes. Accessory biotite may be the result of incipient alteration of the hornblende. Thin section petrography reveals that the gabbro contains both plagioclase and alkali feldspar. The feldspars are incipiently replaced by sericite, carbonates and epidote. Other minerals include actinolite, apatite and titanite (C. Vaillancourt, Ontario Geological Survey, personal communication, 2001). The rock is weakly to moderately magnetic, especially near sulphide blebs that produce rusty weathered patches on the outcrop surfaces. Blebby pyrite and lesser chalcopyrite (± malachite) and pyrrhotite are uniformly disseminated in amounts locally approaching 5%. There is a strong reaction to dimethylglyoxime.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Chalcopyrite | Economic | Ore | ||||
| 3 | Malachite | Economic | Ore | ||||
| 4 | Pyrrhotite | Economic | Ore |
Oct 29, 2014 (Mark Puumala) - Grab samples collected from the Leigh showing have assayed up to 1052 ppb Pd, 135 ppb Pt, 2067 ppm Ni and 1920 ppm Cu (McCrindle and Fingler 2001 AFRI52H12NW2003). The best assay results for samples collected from the showing by the OGS in 2001 were as follows: 555.68 ppb Pd, 98.48 ppb Pt, 1176 ppm Ni and 879 ppm Cu (Schneiders et al. 2002).
| Rank | Classification |
|---|---|
| 1 | Mafic-Ultramafic Intrusion |
Mono - Garden-Obonga Lake Area High Density Lake Sediment and Water Geochemical Survey, Northwestern Ontario
Publication Number: OFR6009 Scale: Date: 2000
Author: Jackson J.E., Dyer R.D.
Publisher Name: Ontario Geological Survey
Location:
Map - Precambrian Geology of the Northwest Portion of the Nipigon Embayment, Northwestern Ontario
Publication Number: P3579 Scale: 1:100,000 Date: 2006
Author: Hart T.R.
Publisher Name: Ontario Geological Survey
Location:
Data - Ontario Airborne Geophysical Surveys, Magnetic and Electromagnetic Data, Garden-Obonga Area
Publication Number: GDS1105 Scale: Date: 2000
Author: Ontario Geological Survey
Publisher Name: Ontario Geological Survey
Location:
Mono - Report of Activities 2001, Resident Geologist Program, Thunder Bay South Regional Resident Geologist Report: Thunder Bay South District
Publication Number: OFR6081 Scale: Date: 2002
Author: Schnieders B.R., Scott J.F., Smyk M.C., Parker D.P., O'Brien M.S.
Publisher Name: Ontario Geological Survey
Location:
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