Targeting battery-grade lithium production for electric vehicle and energy storage 

Property contains rare-metal mineralization similar to world class TANCO (Manitoba) and Bikita pegmatites (Zimbabwe)

Petalite concentrate created from a 5-tonne sample from the Big Mack Pegmatite was approved by Corning Laboratory Services of Corning, New York

The project has an existing closure plan allowing for accelerated exploration and development

Ideal location to ship material to the proposed lithium processing facility in Thunder Bay

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Click image to enlarge


Located in the Paterson Lake Area, Ontario Canada

  • ~80 km north of Kenora, ON
  • Accessible by all-weather highway and logging roads
  • ~50 km by road to Canadian National Railway (Redditt, ON)
  • Proximal to existing Separation Rapids, Big Whopper Pegmatite deposit (~1.3 km)¹:
    • Tonnage-Grade Estimates 
    • Measured: 3,364,000 t @ 1.431% Li2O
    • Indicated: 5,041,000 t @ 1.393% Li2O
    • Measured & Indicated Total: 8,405,000 t @ 1.408% Li2O
    • Inferred: 1,791,000 t @ 1.349% Li2O
1 – Avalon Advanced Materials

The information regarding adjacent properties is taken from public disclosure of the owner or operator of the adjacent property. The Company has not had a qualified person verify this information and this information is not necessarily indicative of the mineralization on the Company’s property.

Eleven Zone, Sprinkler Zone, and 6059 | Geology

  • Eleven Zone is the second largest petalite dike on the property
    • Eleven Zone is interpreted as having a high potential for hosting economic reserves of petalite-tantalum mineralization (Chastko, 2011)
  • Two rare-metal zones lie 600 metres to the east-southeast of the Big Mack pegmatite
    • 1) Sprinkler Zone pegmatite is exposed over a length of 17 metres and a surface width of 2 metres
      • Grab samples returned tantalum values from 10 to 159 ppm
    • 2) 6059 pegmatite has been exposed over a strike length of 30 metres and a width of 5 metres
      • Diamond drill hole SR98-49 assayed over 4785 ppm Li (1.03% LiO2) over a core length of 1.40 metres
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Drilling History

  • Li-bearing zone at Big Mack Pegmatite extending to a vertical depth of 50 metres along a 280° trend
  • Highest historical drill-core sample results:
    • Lithium – 2.74% – Li2O
    • Cesium – 0.088% – Cs2O
    • Rubidium – 0.814% – Rb2O
    • Tantalum – 0.135% Ta2O5
  • Based EFR’s 15-hole diamond drilling program (1998 & 2001), Chastko and Pryslak (MNDM assessment file 2.22913, 2001) proposed a volume of petalite of 325,000 tonnes*

(*Note: A Qualified Person has not done sufficient work to classify the volume estimate as current mineral resources. The Company is not treating the historical estimate as a current mineral resource or reserve. The Company believes that the historic volume estimate is relevant to an appraisal of the merits of the Property and forms a reliable basis upon which to develop future exploration programs. The Company will need to conduct further exploration which will include drill testing the project, and there is no guarantee that the results obtained will reflect the historical estimate. The historical estimates should not be relied on.)

Emerald Field Resources Corporation 1998 and 1999 Diamond Drilling Holes

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Emerald Field Resources Corporation 2001 Diamond Drilling Holes

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Chastko, L.C., 2001. Independent report on rare element pegmatite properties in the Separation, Huston and Linklater lakes area; internal unpublished report, Emerald Fields Resource Corporation 120p.


  • Hydroelectric power generating station is at Whitedog Falls, on the Winnipeg River (68 MW capacity)
  • The transmission line comes within ~30 km of the Property
  • Opportunity to produce ‘green lithium’

First Nations Engagement

  • Property lies within the traditional land use area of the Wabaseemoong Independent First Nations of Whitedog, Ontario
  • Previous holders have had discussions with Wabaseemooong Independent Nations regarding exploration activities on the property
  • The Company is committed to collaborating and working with the First Nation community

Work Plan

  • Prospecting, additional sampling and diamond drilling to further define the potential of the lithium and other rare-metal mineralization associated with the pegmatites
  • Geophysical and subsurface 3D modelling
  • Geochemistry and additional diamond drilling will enable further expansion of the Big Mack pegmatite along strike and depth and help to understand relationships of the identified pegmatites adjacent to the property

Qualified Person

The scientific and technical information contained on this website relating to the Big Mack Project has been reviewed and approved by Craig Ravnaas, P. Geo, a “Qualified Person” as defined by National Instrument 43-101.

For further information regarding the exploration information contained herein regarding the Big Mack Property, including additional information regarding sample, analytical and testing results, please see the Company’s technical report with respect to the Big Mack Property entitled Technical Report on the Big Mack property, Kenora Mining District Northwestern Ontario, Canada with an effective date of December 12, 2022 filed on the Company’s SEDAR profile at on December 14, 2022.

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