DEVELOPING NORTH AMERICA'S NEXT MAGNESIUM OXIDE MINE

 

Driftwood Creek Magnesium Project

MGX is poised to become just the second producer of magnesium oxide in North America through development of its Driftwood Creek magnesium project in British Columbia. Driftwood Creek is host to a high-grade magnesite deposit currently undergoing permitting and economic analysis.

  • Established Mining District: Resides in Driftwood mining district 164 kilometers north of Cranbrook, B.C.
  • Production Profile: PEA outlines 19-year mine life, 3.5 year payback and C$529.8 million pre-tax NPV
  • Mining and Milling: Potentially amenable to open-pit mining and established beneficiation methods
  • Excellent Infrastructure: Access to rails, road, labor and electricity
  • Exploration Potential: Mineralization traced over 2,000 meters; remains open along strike and at depth

2018 Preliminary Economic Assessment

  • Pre-tax NPV @ 5% of $529.8 million, IRR of 24.5% with a 3.5-year payback
  • Post-tax NPV @ 5% of $316.7million, IRR of 19.3% with a 4.0-year payback
  • Initial capital costs of $235.9 million (Total life-of mine ("LOM") - $239.8 includes sustaining/closure costs of $3.9 million and contingency costs of $40.0 million)
  • Conventional quarry pit mine with a 1200 tonne per day ("tpd") process plant using conventional crushing, grinding, flotation upgrading, calcination, and sintering to produce a saleable DBM product
  • Cash costs of $350/tonne MgO
  • All-in sustaining costs ("AISC") of $351/tonne MgO
  • Average annual MgO production of 169,700 tonnes during an 19 year mine life
  • LOM average head grades of 43.27% MgO
  • LOM MgO recoveries of 90%
  • LOM strip ratio of 2.4 to 1 of rock to mineralized material

The reader is advised that the preliminary economic assessment summarized in this press release is only intended to provide an initial, high-level review of the project. The PEA mine plan and economic model include the use of inferred mineral resources which are considered too speculative geologically to have the economic considerations applied to them that would enable them to be categorized as mineral reserves and there is no certainty that the preliminary economic assessment will be realized.

MGX has consolidated key mining claims throughout the Driftwood mining district and controls the majority of significant known magnesite occurrences in British Columbia as listed by the BCGS (British Columbia Geological Survey - Simandl, 2014).

MGX Minerals Driftwood Mining District

Project Location Stage
Driftwood Creek British Columbia Development
Marysville British Columbia Exploration
Red Mountain British Columbia Exploration
Topaz Lake British Columbia Exploration
Cleland British Columbia Exploration
Pond British Columbia Exploration
Botts Lake British Columbia Exploration
Dunbar Creek British Columbia Exploration
 CLASS TONNES
x1000
MgO
%
Al2O3
%
CaO
%
Fe2O3
%
SiO2
%
LIO
%
 Measured 4,702.7 43.31 1.01 0.95 1.29 5.06 47.83
 Indicated 3,144.4 43.22 1.00 1.05 1.42 4.67 47.99
 M&I 7,847.1 43.27 1.00 0.99 1.35 4.90 47.89
 Inferred 55.8 42.95 0.93 0.66 1.43 6.07 47.46
  1. Mineral Resources are not Mineral Reserves and do not have demonstrated economic viability. There is no certainty that all or any part of the mineral resources estimated will be converted into Mineral Reserves.

  2. The Lerchs-Grossman (LG) constrained shell economics used a mining cost of US$8.82/t, processing+ g&a costs of US$106/t, and a commodity price of US$600.00/t 95%MgO DBM.

  3. Mineral resources are reported within the constrained shell, using a cutoff grade of 42.5% MgO (based on a 20-year LOM) to determine “reasonable prospects for eventual economic extraction.”

  4. Mineral Resources are reported as undiluted

  5. Mineral Resources were developed in accordance with CIM (2010) guidelines

  6. Tonnages are reported to the nearest kilotonne (kt), and grades are rounded to the nearest two decimal places

  7. Rounding as required by reporting guidelines may result in apparent summation differences between tonnes, grade, and contained metal.
    M&I = Measured and Indicated.

Driftwood Creek Magnesium N.I. 43-101 Preliminary Economic Assessment
Effective Date: April 16, 2018
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Driftwood Creek Magnesium N.I. 43-101 Mineral Resource Estimate
Effective Date: September 5, 2016
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Driftwood Creek Magnesium N.I. 43-101 Report
Effective Date: July 22, 2014
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