Ontario Geological Survey
Permanent Link to this Record:
MDI52G05NW00012
| Record Name(s) | Johnson Pegmatite - 2004, Trend 2A Pegmatite - 2004, Raleigh Lake Property - 2004 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2004-Feb-11 |
| Date Last Modified | 2022-Dec-08 |
| Created By | |
| Revised By |
Primary Commodities: Lithium, Rubidium, Tantalum
Secondary Commodities: Cesium
Township or Area: Raleigh Lake Area
Latitude: 49° 25' 26.68" Longitude: -91° 57' .74"
UTM Zone: 15 Easting: 576130 Northing: 5475130 UTM Datum: NAD83
Resident Geologist District: Kenora
NTS Grid: 52G05NW
Point Location Description: N/A
Location Method: Based on Assessment
Access Description: The property is located 25 kilometers west of the town of Ignace. The property can be accessed year round from logging roads off the Trans Canada Highway.
1966: Stan Johnson discovered spodumene-bearing pegmatites in the area. 1997-98: R. Fairservice, S. Johnson, and J. Bond staked claims over the area. 1998-2000: Avalon Ventures Ltd. optioned the property, conducted prospecting and drilled 5 DDH totalling 602 m. 2001: Avalon Ventures conducted a lithogeochemical survey and drilled 4 DDH totalling 752 m. 2010: Consolidated Abaddon Resources Inc. conducted a magnetometer survey and drilled 7 DDH totalling 1463.5 m. 2016: International Lithium Corp. acquired the property.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.19511 | 52G05NW2002 | 52G05NW2002 |
| 2.44975 | 20000004647 | 20000004647 |
Province: Superior
Subprovince: Wabigoon
Belt: Raleigh Lake
Geological Age: Archean
Jul 25, 2017 (Therese Pettigrew) - The Johnson Pegmatite is in the Raleigh Lake Rare-Element Pegmatite Field, which is hosted by highly deformed mafic and intermediate metavolcanic rocks of the Raleigh Lake Belt, and to a lesser extent by a small, massive granite pluton (Crocker Bay Stock). Numerous occurrences of rare-element mineralization were discovered by Breaks (1993) along a south-southeast-striking zone, approximately 1.5 km wide and at least 4 km long.
| Rock Type | Rank | Composition | Texture | Relationship | Pegmatite | 1 | Host |
|---|---|---|---|---|
| Mafic lava flow-unsubdivided | 2 | Adjacent | ||
| Granite | 3 | Two-Mica Granite | Adjacent |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Spodumene | Economic | Ore | ||||
| 2 | Manganotantalite | Economic | Ore | ||||
| 3 | Manganocolumbite | Economic | Ore | ||||
| 4 | Molybdenite | Economic | Ore | ||||
| 5 | Holmquistite | Economic | Ore | ||||
| 6 | Beryl | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue | ||||
| 2 | Feldspar | Economic | Gangue | ||||
| 3 | Muscovite | Economic | Gangue | ||||
| 4 | Cleavelandite | Economic | Gangue |
Jul 25, 2017 (C Ravnaas) - Three grab samples along trend 2A, at the Johnson Pegmatite, yielded values of 729-5340 ppm Rb, 56-239 ppm Cs, 62-239 ppm Ta and 49-5770 ppm Li (AFRI 20000004647). Grab samples from trench 2A yielded values up to 108 ppm Rb, 38 ppm Cs, and 1040 ppm Li. Drill hole RL01-06 intersected 2.65m of 0.028% Ta2O5. Seven other dikes were locates in this hole with widths of 0.05 - 3.55m with weakly anomalous values of Li, Cs, Rb and Ta (AFRI 52G05NW2002).
Jul 25, 2017 (Therese Pettigrew) - The 2010 drill program returned assays of Li ranging from 0.24-1.33% Li2O, 0.29-0.35% Rb, and 644-1230 ppm Ta (AFRI 20000004647). The Johnson Pegmatite is in a tantalite-beryl-spodumene zone identified by Breaks (1993). This 8 by greater than 83 m spodumene pegmatite consists of: (1) muscovite-spodumene-quartz-potassium-feldspar core zone (30%); (2) blocky potassium-feldspar-quartz-spodumene intermediate zone (10%); (3) spodumene-muscovite-quartz-cleavelandite border zone (60%). The coarser, central core-zone is composed of inhomogeneously distributed blocky perthitic potassium-feldspar (up to 65 by 80 cm), lime-green spodumene up to 5 cm in diameter, grey quartz-masses and sporadic tantalite. The intermediate zone is rich in fine-grained spodumene (40 to 50%) which commonly reveal a strong subvertical lineation. The border zone is characterized by radiating masses of cleavelandite, only a few percent spodumene and 0.5 to 1% oxide phases (homogeneous and oscillatory zoned manganotantalite to manganocolumbite, replaced by microlite). Other accessory minerals include faint green to white beryl (up to 6 by 11 cm) and molybdenite. Very subtle, purple holmquistite occurs up to 2 m from the pegmatite contacts (Breaks, 1993).
| Rank | Classification |
|---|---|
| 1 | Pegmatite |
| Rank | Characteristic |
|---|---|
| 1 | Intrusive |
Article - Granite-Related Mineralization in Northwestern Ontario: I. Raleigh Lake and Separation Rapids (English River) Rare-Element Pegmatite Fields
Publication Number: MP162.022 Date: 1993
Author: Breaks F.W.
Publisher Name: Ontario Geological Survey
Location:
Map - Precambrian Geology, Ignace Area
Publication Number: P3360 Scale: 1:50,000 Date: 1999
Author: Stone D., Hallé J., Chaloux E.C.
Publisher Name: Ontario Geological Survey
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 Kenora Resident Geologist District Office