Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI000000003007

Record: MDI000000003007

General

Mineral Record Identification
Record Name(s) Tape Lake Pegmatite Dike 1 - 2010
Related Record Type
Related Record(s)
Record Status Occurrence
Date Created 2022-Apr-12
Date Last Modified 2022-Apr-12
Created By
Revised By

Commodities

Primary Commodities: Lithium



Location

Township or Area: Junior Lake Area

Latitude: 50° 28' 4.15"    Longitude: -87° 57' 6.84"

UTM Zone: 16    Easting: 432445   Northing: 5591080    UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 42L05NW

Point Location Description: Dike 1 on map in Assessment report 20000006844

Location Method: Based on Assessment



Exploration History

2010: Landore Resources discovered the showing and carried out prospecting and sampling.


Assessment Work on File

Assessment Work on File
Office File Number Online Assessment File Identifier Online Assessment File Directory
2.49306 20000006844 20000006844



Lithology

Lithology Data
Rock Type Rank Composition Texture Relationship
Pegmatite 1 Host
Mafic lava flow-unsubdivided 2 Contains

Mineralization

Mineralization and Alteration
Rank Mineral Name Class Economic Mineral Type Alteration Mineral Type Alteration Ranking Alteration Intensity Alteration Style
1ApatiteEconomicOre
2SpodumeneEconomicOre
3ColumbiteEconomicOre
4CleavelanditeEconomicOre
5AmblygoniteEconomicOre
6TourmalineEconomicOre
1QuartzEconomicGangue
2FeldsparEconomicGangue
3MuscoviteEconomicGangue

Mineralization Comments

Apr 12, 2022 (Therese Pettigrew) - Dike 1 is approximately 5-8 m in width and striking east-west. It outcrops at the base of a steeply dipping elongate ridge of altered amphibolite altered mafic volcanic rocks. The dike dimensions are well constrained but it was difficult to determine the exact nature of the contacts. 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 (1-5 mm) 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 interstitial weakly altered mineral, possibly triphylotie. Another possible mineral occurrence is audularia, which is pinkish brown and forms intestinally to orthoclase feldspar. Results from grab samples retruend values up to 0.275% Li2O (Assessment report 20000006844).



Assay Samples

Assay Samples
CommodityAnalytical MethodDigestion Method ResultUnitLimitQualifier
LithiumICP-MS1740ppm10

Mineral Record Details

Report an Error

We are continuously updating our assessment file / technical report information. If you notice errors in the data, please contact us.


Terms of Use

Please review our Terms of Use agreement for this data product.


Ministry Contact Information

For detailed information regarding this mineral record please contact the Thunder Bay North Resident Geologist District Office