Mineral Reserve and Mineral Resource Base

Notes:

  1. Ag Eq calculated using Au = $1,250/oz and Ag = $19/oz (Au:Ag ratio = 65:1); Ag Eq does not include base metals
  2. Caylloma and San Jose mines' reserves and resources reported as of December 31, 2017, reserves and resources for Lindero reported as of September 9, 2017

Mineral Reserves - Proven and Probable

PropertyClassificationTonnes
(000)
Ag
(g/t)
Au
(g/t)
Pb
(%)
Zn
(%)
Contained Metal
Ag
(Moz)
Au
(koz)
MinesCaylloma, PeruProven116920.291.973.050.31
 Proven1,487910.232.273.624.411
 Proven + Probable1,603910.232.253.584.712
San Jose, MexicoProven241511.22N/AN/A0.11
 Probable5,0132481.61N/AN/A39.9260
 Proven + Probable5,0372471.61N/AN/A40.1261
Total Proven + Probable6,6402101.28N/AN/A44.8273
Projects Lindero, ArgentinaProven26,009N/A0.74N/AN/A0.0618
 Probable62,263N/A0.57N/AN/A0.01,131
 Proven + Probable88,272N/A0.62N/AN/A0.01,749
Total Proven + Probable 44.82,022
 

Mineral Resources - Measured and Indicated

PropertyClassificationTonnes
(000)
Ag
(g/t)
Au
(g/t)
Pb
(%)
Zn
(%)
Contained Metal
Ag
(Moz)
Au
(koz)
MinesCaylloma, PeruMeasured510780.321.192.291.35
Indicated1,386900.321.362.234.014
Measured + Indicated1,896870.321.322.245.320
San Jose, MexicoMeasured34710.55N/AN/A0.11
Indicated287630.47N/AN/A0.64
Measured + Indicated321640.48N/AN/A0.75
TotalMeasured + Indicated2,217840.34N/AN/A6.025
ProjectsLindero, ArgentinaMeasured610N/A0.24N/AN/A0.05
Indicated11,897N/A0.24N/AN/A0.092
Measured + Indicated12,507N/A0.24N/AN/A0.097
Total Measured + Indicated6.0121
 

Mineral Resources - Inferred

PropertyClassificationTonnes
(000)
Ag
(g/t)
Au
(g/t)
Pb
(%)
Zn
(%)
Contained Metal
Ag
(Moz)
Au
(koz)
MinesCaylloma, PeruInferred5,7511050.352.824.0719.566
San Jose, MexicoInferred2,5962411.53N/AN/A20.1128
TotalInferred8,3471480.72N/AN/A39.6193
ProjectsLindero, ArgentinaInferred5,700N/A0.36N/AN/A0.065
TotalInferred39.6258

Notes:

  1. Mineral Reserves and Mineral Resources are as defined by CIM Definition Standards on Mineral Resources and Mineral Reserves
  2. Mineral Resources are exclusive of Mineral Reserves
  3. Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability
  4. There are no known legal, political, environmental, or other risks that could materially affect the potential development of the Mineral Resources or Mineral Reserves
  5. Mineral Resources and Mineral Reserves are estimated as of June 30, 2017 for San Jose and as of September 30, 2017 for Caylloma and reported as of December 31, 2017 taking into account production-related depletion for the period through December 31, 2017. Mineral Resources and Mineral Reserves for Lindero are reported as of September 9, 2017
  6. Mineral Reserves for San Jose are estimated using a break-even cut-off grade of 117 g/t Ag Eq based on assumed metal prices of US$19/oz Ag and US$1,250/oz Au; estimated metallurgical recovery rates of 92% for Ag and 91% for Au and actual operating costs. Mineral Resources are estimated at a 100 g/t Ag Eq cut-off grade with Ag Eq in g/t = Ag (g/t) + Au (g/t) * ((US$1,250/US$19) * (91/92)). Proven + Probable Reserves include 2.74 Mt containing 25.6 Moz of silver and 153 koz of gold reported at a 120 g/t Ag Eq cut-off grade and Inferred Resources totaling 1.36 Mt containing 11.3 Moz of silver and 62 koz of gold reported at a 100 g/t Ag Eq cut-off grade located in the Taviche Oeste concession and subject to a 2.5% royalty
  7. Mineral Reserves for Caylloma are estimated using break-even cut-off grades based on estimated NSR values using assumed metal prices of US$19/oz Ag, US$1,250/oz Au, US$2,200/t Pb and US$2,500/t Zn; metallurgical recovery rates of 84% for Ag, 17% for Au, 93% for Pb and 90% for Zn with the exception of high zinc oxide areas that use metalurgical recovery of 57% for Ag, 17% for Au, 57% for Pb and 35% for Zn; and actual operating costs. Caylloma Mineral Resources are reported based on estimated NSR values using the same metal prices and metallurgical recovery rates as detailed for Mineral Reserves; and an NSR cut-off grade of US$50/t for veins classified as wide (Animas, Animas NE, Nancy, San Cristobal) and US$135/t for veins classified as narrow (all other veins)
  8. Mineral Reserves for Lindero are reported based on open pit mining within designed pit shells based on variable gold cut-off grades and gold recoveries by metallurgical type. Met type 1 cut-off 0.27 g/t Au, recovery 75.4%; Met type 2 cut-off 0.26 g/t Au, recovery 78.2%; Met type 3 cut-off 0.26 g/t Au, recovery 78.5%; and Met type 4 cut-off 0.30 g/t Au, recovery 68.5%. The cut-off grades and pit designs are considered appropriate for long term gold prices of US$1,250/oz. Lindero Mineral Resources are reported within the same conceptual pit shell above a 0.2 g/t Au cut-off grade using a long-term gold price of US$1,250/oz, mining costs at US$1.67 per tonne of material, with total processing and process G&A costs of US$7.84 per tonne of ore and an average process recovery of 75%. The refinery costs net of pay factor were estimated to be US$6.90 per ounce gold. Slope angles are based on 3 sectors (39°, 42°, and 47°) consistent with geotechnical consultant recommendations
  9. Eric Chapman, P.Geo. (APEGBC #36328) is the Qualified Person for resources and Edwin Gutierrez (SME Registered Member #4119110RM) is the Qualified Person for reserves, both being current or former employees of Fortuna Silver Mines Inc.
  10. Totals may not add due to rounding procedures
  11. N/A = Not Applicable
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