Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI000000003491

Record: MDI000000003491

General

Mineral Record Identification
Record Name(s) Birch Pegmatites - 2022
Related Record Type
Related Record(s)
Record Status Occurrence
Date Created 2023-Jul-18
Date Last Modified 2023-Jul-18
Created By
Revised By

Commodities

Primary Commodities: Beryllium, Cesium, Rubidium

Secondary Commodities: Tantalum



Location

Township or Area: Pickerel Lake Area

Latitude: 48° 43' 17.28"    Longitude: -91° 25' 15.69"

UTM Zone: 15    Easting: 616131   Northing: 5397696    UTM Datum: NAD83

Resident Geologist District: Thunder Bay South

NTS Grid: 52B11NW

Point Location Description: OFR6401 p. 73

Location Method: Data Compilation



Exploration History

2022: Grid Metals Corp. carried out prospecting and sampling. 2023: Usha Resources Ltd. optioned the property.


Geology

Province: Superior

Subprovince: Quetico

Geological Age: Archean  



Lithology

Lithology Data
Rock Type Rank Composition Texture Relationship
Pegmatite 1 Is
Granite 2 Host

Mineralization

Mineralization and Alteration
Rank Mineral Name Class Economic Mineral Type Alteration Mineral Type Alteration Ranking Alteration Intensity Alteration Style
1MuscoviteEconomicOre
2ApatiteEconomicOre
1QuartzEconomicGangue
2FeldsparEconomicGangue

Mineralization Comments

Jul 18, 2023 (Therese Pettigrew) - The Birch pegmatites (616131E 5397696N) are located in the northern part of the property. One of the pegmatites strikes northeast at 040° and dips 70° SE, is approximately 30 to 40 m wide, and is hosted within granite rocks. The pegmatite features coarse-grained quartz and feldspars in excess of 30 cm, and green apatite, green and smokey-silver muscovite were noted. Samples from the Birch Pegmatites area returned 2500 ppm Be from sample W878956; 3450 ppm Be from W878952; 1370 ppm Cs, 1420 ppm Rb and 93.9 ppm Ta from B418894; and 170 ppm Cs and 1020 ppm Rb from B418897 (Campbell et al., 2023).



Assay Samples

Assay Samples
CommodityAnalytical MethodDigestion Method ResultUnitLimitQualifier
BerylliumICP-MSPeroxide fusion3450ppm
BerylliumICP-MSPeroxide fusion2500ppm
BerylliumICP-MSPeroxide fusion19ppm
BerylliumICP-MSPeroxide fusion22ppm
CesiumICP-MSPeroxide fusion7.1ppm
CesiumICP-MSPeroxide fusion194ppm
CesiumICP-MSPeroxide fusion1370ppm
CesiumICP-MSPeroxide fusion170ppm
LithiumICP-MSPeroxide fusion692ppm
LithiumICP-MSPeroxide fusion79ppm
LithiumICP-MSPeroxide fusion159ppm
LithiumICP-MSPeroxide fusion526ppm
NiobiumICP-MSPeroxide fusion166.7ppm
NiobiumICP-MSPeroxide fusion35.2ppm
NiobiumICP-MSPeroxide fusion0ppm
NiobiumICP-MSPeroxide fusion176.5ppm
RubidiumICP-MSPeroxide fusion249ppm
RubidiumICP-MSPeroxide fusion1020ppm
RubidiumICP-MSPeroxide fusion1420ppm
RubidiumICP-MSPeroxide fusion108ppm
TantalumICP-MSPeroxide fusion39.3ppm
TantalumICP-MSPeroxide fusion93.9ppm
TantalumICP-MSPeroxide fusion.5ppm
TantalumICP-MSPeroxide fusion12.5ppm

Mineral Record Details

References

Mono - Report of Activities 2022, Resident Geologist Program, Thunder Bay South Regional Resident Geologist Report: Thunder Bay South District

Publication Number: OFR6401 Page: 73  Date: 2023

Author: Campbell D.A., Jonsson J.R.B., Dorland G., Pettigrew T.K., Ferguson S.A.

Publisher Name:

Location:


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