Mineral Resources

Mineral Resources

Measured and Indicated Resources
Project
Category
Tonnes
Au Grade
(g/t) 
Ag Grade
(g/t)
Contained
Au oz 
Contained
Ag oz 
Cameron(1)
Measured
3,360,000
2.75
-
297,000
-
Duparquet(2)
Measured
16,500
1.45
-
770
-
Springpole(3)
Indicated
139,100,000
1.04
5.40
4,670,000
24,190,000
Hope Brook(4)
Indicated
5,500,000
4.77
-
844,000
-
Goldlund(5)
Indicated
9,300,000
1.87
-
560,000
-
Duquesne(6)
Indicated
1,859,000
3.33
-
199,000
-
Duparquet(2)
Indicated
5,954,000
1.57
-
300,700
-
Cameron(1)
Indicated
2,170,000
2.40
-
167,000
-
Total
Measured
3,376,500
2.74
-
297,770
 
Total
Indicated
163,883,000
1.28
5.70
6,740,700
24,190,000
Total
Measured & Indicated
167,259,500
1.31
5.70
7,038,470
24,190,000
Inferred Resources
Project
Category
Tonnes
Au Grade
(g/t) 
Ag Grade
(g/t)
Contained
Au oz 
Contained
Ag oz 
Springpole(3)
Inferred
11,400,000
0.63
3.10
230,000
1,120,000
Goldlund(5)
Inferred
40,900,000
1.33
-
1,750,000
-
Hope Brook(4)
Inferred
836,000
4.11
-
110,000
-
Pickle Crow(7)
Inferred
10,300,000
3.90
-
1,262,000
-
Duquesne(6)
Inferred
1,563,000
5.58
-
281,000
-
Duparquet(2)
Inferred
2,846,000
1.46
-
133,400
-
Pitt(8)
Inferred
1,076,000
7.42
-
257,000
-
Cameron(1)
Inferred
6,535,000
2.54
-
533,000
-
Total
Inferred
75,456,000
1.89
3.10
4,556,400
1,120,000

* General Notes for Above Resources:

a) The rounding of tonnes may result in apparent differences between tonnes, grade and contained ounces.

b) Mineral resources that are not mineral reserves do not have demonstrated economic viability. The estimate of mineral resources may be materially affected by environmental permitting, legal, title, taxation, sociopolitical, marketing or other relevant issues.

(1) Notes for Cameron:

  • Based on the technical report titled “Technical Report on the Cameron Gold Deposit, Ontario, Canada”, dated effective January 17, 2017, which is available at www.sedar.com under First Mining’s SEDAR profile.
  • The mineral resource estimate is classified as Measured, Indicated and Inferred mineral resources.
  • 2014 CIM Definition Standards were followed for classification of mineral resources.
  • The mineral resource has been estimated using a gold price of US$1,350/oz.
  • The mineral resource was estimated using a block model. Three dimensional wireframes were generated using geological information. The ordinary kriging estimation method was used to interpolate grades into blocks. Blocks were sub-blocked to more accurately reflect the volume of the wireframes.
  • Mineral resources that are not mineral reserves do not have demonstrated economic viability. There is currently insufficient exploration to define these Inferred mineral resources as Indicated or Measured mineral resources and it is uncertain if further exploration will result in upgrading them to an Indicated or Measured mineral resource category.
  • Numbers may not add due to rounding.
  • The mineral resource for the Cameron Gold Project does not include the mineralized material from the Dubenski and Dogpaw areas.

(2) Notes for Duparquet:

  • Based on the technical report titled “Technical Report and Prefeasibility Study for the Duparquet Project (according to National Instrument 43-101 and Form 43-101F1). Effective date: March 26, 2014. Signature date: May 23, 2014. Available at www.sedar.com under Clifton Star Resources Inc.’s SEDAR profile.
  • Cut-off grade = >0.45 g/t (Tailings), >0.45 g/t (In-pit), > 2.00 g/t (Underground)
  • Gold price assumption = CDN$1,450/oz. Au.
  • First Mining owns a 10% indirect interest in the Duparquet Gold Project, and the Measured, Indicated, and Inferred mineral resources shown in the above table reflect the Company’s 10% indirect interest.

(3) Notes for Springpole:

  • Based on the technical report titled "Preliminary Economic Assessment Update for the Springpole Gold Project, Ontario, Canada", dated October 16, 2017, which is available at www.sedar.com under First Mining's SEDAR profile. Readers are cautioned that the PEA is preliminary in nature, it includes inferred mineral resources that 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 PEA will be realized.  Mineral resources that are not mineral reserves do not have demonstrated economic viability.
  • These resource estimates have been prepared in accordance with NI 43-101 and the 2014 CIM Definition Standards.  Mineral resources that are not mineral reserves do not have demonstrated economic viability.  See cautionary notes at the end of this news release.
  • Open pit mineral resources are reported at a cut-off grade of 0.4 g/t gold.  Cut-off grades are based on a gold price of $1,400/oz and a gold processing recovery of 80% and a silver price of $15/oz and a silver processing recovery of 60%.
  • Appropriate mining costs, processing costs, metal recoveries and inter ramp pit slope angles were used to generate the pit design.
  • The estimated life of mine strip ratio for the resource estimate is 2.1.
  • Rounding may result in apparent summation differences between tonnes, grade and contained metal content.
  • Tonnage and grade measurements are in metric units.  Contained gold and silver ounces are in troy ounces.
  • All composites have been capped where appropriate.

(4) Notes for Hope Brook:

  • Based on the technical report titled “2015 Mineral Resource Estimate Technical Report Hope Brook Gold Project Newfoundland And Labrador Canada”, effective date January 12, 2015 and available at www.sedar.com under First Mining’s SEDAR profile.
  • Cut-off grade = 3.0 g/t Au
  • Long-term gold price of US$1,200/oz Au.
  • This resource includes only the Mine Zone and 240 Zone areas.
  • This resource is based on the partial percentage block model with dike material removed. Dike percentage is estimated at 18% for the Mine Zone and 0% for the 240 Zone.
  • The gold grades reflect applications of domain-specific raw assay capping factors that range between 55 g/t and 3 g/t.

(5) Notes for Goldlund:

  • Based on the technical report titled “Technical Report and Resource Estimation Update on the Goldlund Project” dated January 23, 2017, which is available at www.sedar.com under First Mining’s SEDAR profile.
  • Base case is 0.4 g/t Au cut-off grade.
  • Resources stated as contained within a potentially economic limiting pit shell using a metal price of US$1,350 per ounce of gold, mining costs of US$2.00 per tonne, processing plus G&A costs of US$15.40 per tonne, 93% recoveries and an average pit slope of 48 degrees.
  • 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 will be converted into mineral reserves.
  • Mineral resource tonnage and contained metal have been rounded to reflect the accuracy of the estimate, and numbers may not add due to rounding.

(6) Notes for Duquesne:

  • Based on the technical report titled “43-101 Technical Report Resource Estimate of The Duquesne Gold Property” dated July 26, 2011 and available at www.sedar.com under Clifton Star Resources Inc.’s SEDAR profile.
  • Cut-off grade = 1.0 g/t Au without taking into account the width and no dilution was applied when the horizontal width was 1 metre or less.

(7) Notes for Pickle Crow

  • Based on the technical report titled “A Mineral Resource Estimate for the Pickle Crow Property, Patricia Mining Division, Northwestern Ontario, Canada” dated June 2, 2011 and available at www.sedar.com under PC Gold Inc.’s SEDAR profile
  • Diluted to a minimum 1.0 metre width.
  • Entirely classified as an inferred mineral resource.
  • The long-hole bulk underground (moderate-grade) component of the mineral resource has been estimated at a cut-off grade of 2.0 g/t Au.
  • The open pit (low-grade) component of the mineral resource has been estimated at a pit discard cut-off grade of approximately 0.35 g/t Au, using a preliminary Whittle pit shell to constrain the resource estimate and other assumed pit parameters.
  • The mineral resource has been estimated using a gold price of US$1,100/oz.

(8) Notes for Pitt:

  • Based on the technical report titled “NI 43-101 Technical Report and Review of the Preliminary Resource Estimate for the Pitt Gold Project, Duparquet Township, Abitibi Region, Quebec, Canada” dated January 5, 2017 and available at www.sedar.com under First Mining’s SEDAR profile.
  • Cut-off grade = 3 g/t Au, Minimum block width = 1.5 metres, Dilution grade = 0 g/t, Capping grade = 35 g/t.

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