Ontario Geological Survey
Permanent Link to this Record:
MDI000000003008
| Record Name(s) | Tape Lake Pegmatite Dike 2 - 2010 |
|---|---|
| Related Record Type | |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 2022-Apr-12 |
| Date Last Modified | 2023-May-15 |
| Created By | |
| Revised By |
Primary Commodities: Lithium
Secondary Commodities: Tin
Township or Area: Junior Lake Area
Latitude: 50° 28' 13.66" Longitude: -87° 56' 28.12"
UTM Zone: 16 Easting: 433212 Northing: 5591364 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 42L05NW
Point Location Description: Dike 2 on map in Assessment report 20000006844
Location Method: Based on Assessment
2010: Landore Resources discovered the showing and carried out prospecting and sampling.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.49306 | 20000006844 | 20000006844 |
| Rock Type | Rank | Composition | Texture | Relationship | Pegmatite | 1 | Host |
|---|---|---|---|---|
| Mafic lava flow-unsubdivided | 2 | Contains |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Apatite | Economic | Ore | ||||
| 2 | Spodumene | Economic | Ore | ||||
| 3 | Columbite | Economic | Ore | ||||
| 4 | Cleavelandite | Economic | Ore | ||||
| 5 | Amblygonite | Economic | Ore | ||||
| 6 | Tourmaline | Economic | Ore | ||||
| 7 | Cassiterite | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue | ||||
| 2 | Feldspar | Economic | Gangue | ||||
| 3 | Muscovite | Economic | Gangue |
Apr 12, 2022 (Therese Pettigrew) - These dikes are composed of very coarse grained and pegmatitic quartz (40%) plagioclase feldspar (albite-microcline; 45%; locally trace to 1% orthoclase also observed) and thick books of muscovite (1-5 cm; 15%). These three mineral phases are relatively homogenously distributed throughout the entirety of the dike and vary little compositionally. Heterogeneously distrusted accessory minerals do not exceed 5% throughout but can be found locally up to 15% in small patches or clusters. These minerals include but are not limited to: fluoroapatite, spodumene, columbite-tantatlite, cleavelandite, amblygonite, and tourmaline. Fluoroapatite forms small (1-5mm) rounded light bluish-green crystals disseminated locally up to 2%. Spodumene forms elongate whitish-yellow crystals which distinct form (2-4cm; max 10%, average trace to 1%). Spodumene was observed in dike 2 up to 30% locally. Columbite-tantalite forms black stubby crystals generally with well defined habit up to 3cm in size though generally forming small crystals locally disseminated throughout. Distribution of columbite-tantalite is highly irregular and locally only forms less than 2%. Cleavlandite forms with albite and quartz as irregular clusters and small masses up to 3cm but not more than 5% locally. Amblygonite form small grayish white massive disseminated grains forming interstitially to feldspar and quartz. Tourmaline, variety schorl, forms the most abundant accessory mineral locally up to 15%. It forms shiny black triangular prismatic crystals which are locally isolated as well as forming bands and patches of cumulates. Locally, less than 1% overall is a yellowish-brown intersticial weakly altered mineral, possibly triphylotie. Another possible mineral occurrence is audularia, which is pinkish brown and forms intestinally to orthoclase feldspar. A sample from dike 2 contained a metallic grey blue mineral up to 2 cm which has been tentatively identified as cassiterite. Grab samples from Dike 2 returned up to 0.191% Li2O (Assessment report 20000006844).
| Commodity | Analytical Method | Digestion Method | Result | Unit | Limit | Qualifier |
|---|---|---|---|---|---|---|
| Lithium | ICP-MS | 1140 | ppm | 10 |
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For detailed information regarding this mineral record please contact the Thunder Bay North Resident Geologist District Office