• Juanicipio JV

JUANICIPIO PROJECT
MUNICIPIO FRESNILLO ZACATECAS, MEXICO

The Company owns 44% of Minera Juanicipio S.A. de C.V. ("Minera Juanicipio"), a Mexican incorporated joint venture company, which owns the high-grade Juanicipio Property, located in the Fresnillo District, Zacatecas State, Mexico. Both exploration and development of the Juanicipio Property are being carried out by the project operator, Fresnillo plc ("Fresnillo"), which holds the remaining 56% interest in the joint venture. The major asset associated with the Juanicipio Property is a high-grade silver-gold-lead-zinc epithermal vein deposit. The primary vein, the Valdecañas Vein, is an en echelon system comprised of overlapping East and West Veins and several smaller vein splays (the term "Valdecañas Vein" is used to refer to this en echelon system).

Exploration and development programs for the Juanicipio Property are designed by the Minera Juanicipio Technical Committee, and approved by the Minera Juanicipio Board of Directors. The Company's share of costs is funded primarily through its 44% interest in Minera Juanicipio, and to a lesser extent, incurred directly by the Company to cover expenses related to parallel technical studies and analyses commissioned by the Company, as well as direct project oversight. Minera Juanicipio is governed by a shareholders agreement and corporate by-laws, pursuant to which each shareholder is to provide funding pro rata to its interest in Minera Juanicipio.

MAG Silver owns 44% of Minera Juanicipio S.A. de C.V. (“Minera Juanicipio”), a Mexican incorporated joint venture company, which owns the high-grade silver Juanicipio Project, located in the Fresnillo District, Zacatecas State, Mexico.  MAG and Fresnillo plc (“Fresnillo”), which holds the remaining 56% of the joint venture, jointly approved the project mine development on April 11, 2019 and expect to achieve commercial production in late 2020. The exploration, development and construction of the Juanicipio Project are all being carried out by the project operator, Fresnillo, although MAG participates in both board and technical committee meetings.

 

The Juanicipio Project consists of high-grade silver-gold-lead-zinc epithermal vein deposits.  The principal vein, the Valdecañas Vein, is an en echelon system comprised of overlapping East and West Veins and several smaller vein splays – the term “Valdecañas Vein” is used to refer to this combined en echelon system. The current Juanicipio Project mine development consists of approximately 23 kilometres (“km”) of ongoing underground development, associated underground and surface infrastructure, and with the recent formal joint project approval by both partners, the plan for immediate construction of a 4,000 tonnes per day (“tpd”) processing plant.  In addition, ongoing exploration continues on both the Valdecañas Vein system and on other prospective targets within the joint venture property boundaries.  

Exploration and development programs for the Juanicipio Project are designed by the Minera Juanicipio Technical Committee which is represented by both partners, and approved by the Minera Juanicipio Board of Directors. Construction of the processing plant is under the guidance of an Engineering, Procurement and Construction Management (“EPCM”) contract entered into with Fresnillo to oversee the mine development.  The Company’s share of project costs is funded primarily by quarterly cash calls through its 44% interest in Minera Juanicipio, and to a lesser extent, incurred directly by MAG to cover expenses related to its own commissioned technical studies and analyses, as well as direct project oversight.  Minera Juanicipio is governed by a shareholder’s agreement and corporate by-laws, pursuant to which each shareholder is to provide funding pro rata to its ownership interest, and if either party does not fund pro rata, their ownership interest will be diluted in accordance with the shareholders agreement.

The 2017 PEA incorporates major overall project upgrades highlighted by the delineation and provision for mining of greatly expanded Indicated and Inferred Mineral Resources discovered in the Deep Zone. The volume of these new base metal-rich Deep Zone Resources contributed to a significant expansion of project scope and enhancements to most aspects of the mine design. Truck hauling, shaft hoisting, and underground conveying, along with underground crushing of the mineralized rock are all projected to be utilized for delivering the mineralized rock to the surface processing plant. An underground winze (internal shaft) is planned to be sunk within the hangingwall of the Valdecañas Vein system, to hoist mineralized rock from lower levels of the mine to the underground crusher and conveying system from the 6th year after plant start-up onward.  As envisioned in the 2017 PEA, the proposed process plant has a planned production rate of 4,000 tpd, and the plant and tailings storage facility will be located in newly acquired open, flat ground.  It will include a SAG/Ball mill comminution circuit followed by sequential flotation to produce a silver-rich lead concentrate, a zinc concentrate and a gold-rich pyrite concentrate.

 

Based on the 2017 PEA, MAG Silver views the Juanicipio Project as a robust, high-grade, high-margin underground silver project exhibiting low development risks. On April 11, 2019, both Minera Juanicipio shareholders (Fresnillo and MAG) jointly approved the project for formal mine development and plant construction (see Juanicipio Project Update below). Both shareholders are currently advancing money to build out this project with initial production scheduled for late 2020 according to the operator Fresnillo.

While the results of the 2017 PEA are promising, by definition a Preliminary Economic Assessment is preliminary in nature and includes Inferred Mineral Resources that are considered too geologically speculative to have the economic considerations applied to them that would enable them to be categorized as Mineral Reserves.  Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability and there is no certainty that Mineral Resources will ever become Mineral Reserves.  There can therefore be no certainty that the results in the 2017 PEA will be realized. In addition, the 2017 PEA was commissioned independently by MAG, and not by Minera Juanicipio.  Fresnillo is the project operator and the actual development plan and timeline may be materially different.  The scope, design, and operating results of the Juanicipio Project may differ from the scope, design and results envisaged in the 2017 PEA (see ‘Risks and Uncertainties’ below). 

 

2.         HIGHLIGHTS – SEPTEMBER 30, 2019                                                                                 

 

  • Joint formal Juanicipio Project mine development approval by Fresnillo and MAG was announced in the second quarter of 2019 (see Press Release dated April 11, 2019), and an EPCM contract finalized to oversee the mine development.

 

  • During the quarter ended September 30, 2019 further progress was made in detailed engineering, and subsequent to the quarter end in October, earthmoving and foundation preparation commenced for the construction of the 4,000 tpd beneficiation plant.

 

  • Mill fabrication is progressing on schedule, and both the SAG and ball mills are expected to be shipped to site early 2020. Flotation cells, processing tanks and minor process equipment pieces are starting to arrive on site. Thickener tanks and drive and rakes fabrication are well advanced.

 

  • Underground development is ongoing at Juanicipio and has now reached approximately 23 kilometres of development (or 14.3 miles). The focus areas for underground development are the three sub-vertical ramps that descend alongside the mineralization and the conveyor ramp to surface.

 

  • Construction is on track for late 2020 commissioning according to the operator Fresnillo.

 

  • Estimated pre-operative initial capital is $395,000 (100% basis) as of January 1, 2018, less development expenditures incurred since then to September 30, 2019 of approximately $107,600 (Company therefore estimates approximately $287,400 of remaining initial capital on a 100% basis as at September 30, 2019).

 

  • MAG is well funded with cash and cash equivalents as at September 30, 2019 of $94,599 while Minera Juanicipio had working capital on a 100% basis of $24,486 as at September 30, 2019.

 

  • A 25,000 metre 2019 Juanicipio exploration program was completed in late October, with all assays pending.

 

 

3.         JUANICIPIO PROJECT UPDATE                                                                                                     

Total Juanicipio Project expenditures incurred and capitalized directly by Minera Juanicipio (on a 100% basis) for the three and nine months ended September 30, 2019 amounted to $42,023 and $70,904 respectively (September 30, 2018: $11,301 and $29,795 respectively). Of the total expenditures in the nine months ended September 30, 2019, $66,592 (September 30, 2018: $25,947) are estimated to be development expenditures and the remaining $4,312 (September 30, 2018: $3,848) are estimated as exploration expenditures. 

 

 

 

MINE DEVELOPMENT APPROVAL – Juanicipio Project

 

On April 11, 2019, Fresnillo and MAG as shareholders of Minera Juanicipio, jointly announced formal approval of the Juanicipio mine development plan. The partners of Minera Juanicipio also finalized an EPCM agreement as part of the approval process which defines the specific terms by which Fresnillo will oversee the continued project development and the construction of the process plant and associated surface infrastructure.  Pre-operative initial capital is estimated on a 100% basis as $395,000 as of January 1, 2018, of which over the past 21 months approximately $107,600 has been expended to September 30, 2019, leaving an estimated $287,400 of remaining initial capital (MAG’s 44% remaining share estimated $126,456 as at September 30, 2019) (see Liquidity and Capital Resources below).  

 

The Operator Services agreement was also finalized by the partners in the project approval process which will become effective on commencement of commercial production. As well, both lead and zinc off-take agreements have been agreed to by the partners whereby both concentrates will be treated at market terms by Met-Mex Peñoles, S.A. De C.V., in Torreón, Mexico.

 

 

SURFACE CONSTRUCTION AND SITE PREPARATION – Juanicipio Project

 

Upon project approval, construction plans for the 4,000 tpd processing plant commenced immediately.  Basic engineering is substantially complete and detailed engineering is well advanced. Development of surface infrastructure facilities (power lines, access roads, auxiliary buildings, etc.) had already previously begun and continues.  During the quarter ended September 30, 2019, further progress was made in detailed engineering, and subsequent to the quarter end in October, earthmoving and foundation preparation commenced for the construction of the beneficiation plant.

 

Orders had already been placed and the manufacturing of the long lead items for the process plant is well advanced. Mill fabrication is progressing on schedule, and both SAG and ball mills are expected to be shipped to site early 2020. Flotation cells, processing tanks and minor process equipment pieces are starting to arrive on site. Thickener tanks and drive and rakes fabrication are well advanced.

 

According to the operator, Fresnillo, permitting for the tailings impoundments should be completed in the fourth quarter of this year and mill construction is on track for commissioning by late 2020.

 


 

Underground Development

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Underground development commenced at the Juanicipio Property on October 28, 2013, with development to date focused primarily on advancing the ramp decline to the main Valdecañas Vein on the property. Ramp-related surface installations, offices and associated infrastructure have been completed, and construction of additional ventilation raises is on-going.

A new Technical Report entitled 'MAG Silver Juanicipio NI 43-101 Technical Report (Amended and Restated)' with the effective date of 21 October 2017 has been filed on SEDAR, and documents the current Mineral Resource Estimate and a Preliminary Economic Assessment (collectively the "2017 PEA").

UNDERGROUND DEVELOPMENT Update – Juanicipio Project

Access to the mine will be via the completed twin underground declines that now have reached the top of mineralization in the Valdecañas Vein.  From there, the upper footwall haulage/access drift has been driven the length of the vein from which three internal spiral footwall production ramps will extend to depth. Twinning of the original access decline was required to provide expanded capacity for hauling additional mineralized rock and waste stemming from the planned increase in processing capacity to 4,000 tpd.  The twin ramp was started in 2017 and completed in the second half of 2018 and is accessible through a second entry portal for the mine also completed in 2018. The twin ramps allow for streamlined underground traffic flow and increased safety through the mine having a second egress. The three spiral ramps into the mineralized envelope are designed to provide access to stopes within the mineralized material and were also required to facilitate the increase in planned mining rate to 4,000 tpd.  The first cross-cuts through the vein have been made from the easternmost footwall ramp, exposing well-mineralized vein. 

 

Mineralized material from throughout the vein will be crushed underground and the crushed material conveyed directly from the underground crushing station (already excavated) to the process plant area via a third ramp which is being driven both from the surface and from the crushing chamber.  This ramp will also provide access to the entire Valdecañas underground mining infrastructure and serve as a fresh air entry for the ventilation system.

 

Current underground development is now actively focused on:

  • advancing the three internal spiral footwall ramps to be used to further access the full strike length of the Valdecañas Vein system;
  • making the first cross-cuts through the vein as the footwall ramps advance
  • constructing the underground crushing chamber;
  • advancing the underground conveyor ramp to and from the planned surface processing facility from both faces;
  • integrating additional ventilation and other associated underground infrastructure; and,
  • sinking of the internal shaft – the head chamber for the shaft has been excavated, the shaft has been collared and winding equipment ordered.

 

With total underground development having now reached approximately 23 kilometres to date, an additional contractor has been appointed to further accelerate development rates. Concurrent with the ongoing underground development, detailed engineering continues for the internal shaft, other mine infrastructure, and the final process plant configuration.



Based on the 2017 PEA, the Company views Juanicipio as an economically robust, high-grade underground silver project exhibiting minimal financial or development risks that is expected to produce an annual average of 16.5 million payable ounces of silver over the first full six years of commercial production and 9.6 million payable ounces per year over a 19 year total mine life.

The economic analysis in the 2017 PEA is preliminary in nature and is based, in part, on 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. There is no certainty that a Preliminary Economic Assessment will be realized.

Exploration on the Juanicipio Project

Drilling of the Deep Zone is ongoing, and the Deep Zone effectively remains open to depth and laterally along its entire strike length to the Joint Venture boundary in both directions. Drilling of the Deep Zone to date has:

  • confirmed that continuous mineralization extends below the Valdecañas Bonanza Zone in both the East and West Veins;
  • revealed a substantial widening of this deeper mineralization into a well-defined dilatant zone under both veins;
  • improved definition of the new "Anticipada" or "Vant" Vein, within the vein system; and
  • combined to indicate that a major ore-fluid input point underlies the Overlap Zone between the East and West veins

A significantly expanded Mineral Resource estimate for the base metal-rich Deep Zone was included in the 2017 PEA (see 2017 PEA Summary below), and various other targets within the Juanicipio property boundaries are expected to be tested in 2018.

2017 PEA Summary

The 2017 PEA incorporates major project upgrades from the previously envisioned project parameters, highlighted by the delineation and provision for mining of a greatly expanded Indicated and Inferred Mineral Resource in the recently discovered (2015) "Deep Zone." The volume of these new base metal-rich Deep Zone Resources contributed to a significant expansion of project scope and enhancements to most aspects of the mine design.

2017 PEA BASE CASE (1) HIGHLIGHTS - reported on a 100% project basis:

  • 4,000 tonnes per day ("tpd") production rate with an initial 19 years of mine life;
  • Enhanced project engineering, including: new plant and tailings location on flat, open ground; underground crusher and ore conveyor system; ramp expansions and internal shaft (winze);
  • Low AISC(2) of $5.02 per oz of silver;
  • $360 million ("M") initial capital cost from January 1, 2018 to projected production start-up in H1, 2020;
  • Payback in less than two years after plant start-up;
  • Pre-tax Net Present Value ("NPV") at a 5% discount rate of $1.86 billion and an IRR of 64.5%, and;
  • After-tax NPV at a 5% discount rate of $1.14 billion and IRR of 44.5%.

1 The 2017 PEA Base Case uses a 5% discount rate and metal prices of $17.90 per oz of silver, $1,250/oz of Gold, $0.95 per pound ("lb") of Lead and $1.00/lb of Zinc.

2 "AISC" means All-in sustaining costs. The projected AISC was calculated by the authors of the 2017 PEA at a cost of $5.02/Ag by summing life of mine offsite and operating costs, taxes, duties and royalties and sustaining capital, all net of by-product revenues, and dividing the resulting total by the total payable ounces of silver projected to be produced over the life of mine. AISC is not a recognized measure under IFRS and this projected financial measure may not be comparable to AISC metrics presented by other silver producers.

Table 1: Metal Price Sensitivity Analysis:

Discount Rate (5%)

 

Base Case

   

 

2017 vs 2012 (1)

Metal Prices:

             

Silver ($/oz)

14.50

17.90

19.50

23.00

 

23.39

Gold ($/oz)

1,000

1,250

1,300

1,450

 

1,257

Lead ($/lb)

0.75

0.95

0.95

1.15

 

0.95

Zinc ($/lb)

0.75

1.00

1.05

1.20

 

0.91

Copper ($/lb)

N/A -- Copper excluded for purposes of 2017 PEA (2)

     

Economics:

 

 

     

2017

2012 (1)

Pre-Tax NPV (M)

$1,080

$1,860

$2,104

$2,776

 

$2,427

$1,762

After-Tax NPV (M)

$ 635

$1,138

$1,295

$1,729

 

$1,503

$1,233

Pre-Tax IRR

45%

64%

71%

86%

 

83%

54%

After-Tax IRR

30%

44%

49%

61%

 

58%

43%

Undiscounted life of mine ("LOM") after tax cash flow (M)

$1,170

$1,995

$2,243

$2,945

 

$2,542

$2,162

Cash cost(4) $/oz Ag (net of credits)

(0.35)

(3.94)

(4.45)

(6.90)

 

(3.11)

(0.03)

Total Cash cost(5) $/oz Ag

3.50

2.39

2.63

2.29

 

4.89

N/A(3)

AISC(6) $/oz Ag

6.13

5.02

5.25

4.92

 

7.51

N/A(3)

Payback (Years) From Plant Start up (based on after tax cash-flows)

2.6

1.8

1.6

1.2

 

1.2

2.1

Notes:

1) This column is based on metal prices used in the previous 2012 Juanicipio PEA, and has been provided in order to allow a comparison of PEA economics (2017 vs 2012) and demonstrate the economic effects on the project of the expanded resource and enhanced mine design. (A Corporate Tax Rate of 28% was used in 2012 (30% in 2017) and in 2012 there was no Special Mining Duty (7.5% in 2017) or gold/silver Royalty, (0.5% in 2017), the latter both imposed in 2014. Exchange rate of 12.86 Mexican Pesos per US$ was used in 2012 (18.46 Mexican Pesos per US$ in 2017)).

2) Although the 2017 resource for the Deep Zone now includes copper (see below), no copper circuit has been included in the 2017 PEA as no metallurgical testing and recovery assessment for copper has yet been completed.

3) See Press Release June 14, 2012. Total Cash cost and AISC per oz. of silver were not calculated for the 2012 report.

4) Cash costs include all operating costs, smelter, refining and transportation charges, net of by-product (gold, lead and zinc) revenues.

5) Total cash costs include cash costs and all corporate taxes, special mining duty, and precious metals royalty.

6) The projected AISC was calculated by the authors of the 2017 PEA at a cost of $5.02/Ag by summing life of mine offsite and operating costs, taxes, duties and royalties and sustaining capital, all net of by-product revenues, and dividing the resulting total by the total payable ounces of silver projected to be produced over the life of mine. AISC is not a recognized measure under IFRS and this projected financial measure may not be comparable to AISC metrics presented by other silver producers.

While the results of the 2017 PEA are promising, by definition a Preliminary Economic Assessment is preliminary in nature and 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. There can therefore be no certainty that the results in the 2017 PEA will be realized. The 2017 PEA is based on MAG's understanding of how the project is being developed; however, Fresnillo is the project operator and the actual development plan and timeline may be materially different (see 'Risks and Uncertainties' below). It is also important to note that Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability and there is no certainty that Mineral Resources will ever become Mineral Reserves.

2017 MINERAL RESOURCE HIGHLIGHTS - reported on a 100% project basis:

  • High grade silver-rich Bonanza Zone (basis for development to date) containing:
    - 8.2 M Indicated Resource tonnes at 550 grams per tonne ("g/t") silver; and,
    - 2.0 M Inferred Resource tonnes at 648 g/t silver.
  • Significantly expanded Mineral Resource for the base metal-rich Deep Zone, containing:
    - 4.7 M Indicated Resource tonnes with 209 g/t silver, 2.96% lead, 4.73% zinc, and 0.23% copper; and,
    - 10.1 M Inferred Resource tonnes with 151 g/t silver, 2.69% lead, 5.05% zinc, and 0.31% copper.
  • Consistent gold across both zones, containing:
    - 12.8 M Indicated Resource tonnes at 2.10 g/t gold; and,
    - 12.1 M Inferred Resource tonnes at 1.44 g/t gold.

The updated independent Mineral Resource estimate was generated using a cut-off Net Smelter Return ("NSR") value of $55/t and drilling data available up to December 31, 2016. This estimate has an effective date of October 21, 2017 (see Table 3) and reflects the results of both infill and exploration holes drilled in 2014 through 2016, with the greatest increase shown within the Deep Zone discovered in 2015. The Valdecañas Vein displays well the vertical mineralization gradations from upper silver-rich zones to deep base metal-dominant areas that are typical of Fresnillo District veins and epithermal silver veins in general. Because of this vertical compositional zonation, and significant dimensional increases with depth, the Mineral Resource estimate has been manually divided into the Bonanza Zone and the Deep Zone to highlight the definition of each zone.

Table 3: Juanicipio Project Mineral Resource estimate by zone (October 21, 2017):

Zone

Resource Category

Tonnes (Mt)

Ag (g/t)

Au (g/t)

Pb

(%)

Zn (%)

Cu (%)

Ag (Moz)

Au (Koz)

Pb (Mlb)

Zn (Mlb)

Cu
(Mlb)

Bonanza Zone

Indicated

8.17

550

1.94

1.63

3.08

0.08

145

509

294

554

14

Inferred

1.98

648

0.81

1.32

2.80

0.06

41

52

58

123

3

Deep Zone

Indicated

4.66

209

2.39

2.96

4.73

0.23

31

359

304

486

24

Inferred

10.14

151

1.57

2.69

5.05

0.31

49

510

601

1,129

69

Notes

1) 2014 CIM Definition Standards were used for reporting the Mineral Resources.

2) The Qualified Person is Dr. Adrienne Ross, P.Geo. of AMC Mining Consultants (Canada) Ltd.

3) Mineral Resources are reported at a resource NSR cut-off value of $55/t.

4) The Mineral Resource estimate uses drill hole data available as of December 31, 2016.

5) Resource NSR values are calculated in US$ using factors of $0.61 per g/t Ag, $34.27 per g/t Au, $19.48 per % Pb, and $19.84 per % Zn. These factors are based on metal prices of $20/oz Ag, $1,300/oz Au $0.95/lb Pb, and $1.00/lb Zn and estimated recoveries of 82% Au, 95% Ag, 93% Pb, 90% Zn. The Mineral Resource NSR does not include offsite costs.

6) Mineral Resources are not Mineral Reserves and do not have demonstrated economic viability.

7) Totals may not add correctly due to rounding

The Bonanza Zone resource veins have a similar footprint as previous resource estimates (see Press Release dated, May 27, 2014), with approximately 78% of the total silver ounces in the Bonanza Zone now classified as Indicated. The newly updated Resource Estimate significantly expands the Inferred and Indicated resources in the base metal-rich Deep Zone, which includes a maiden copper resource.

Combining the Bonanza Zone and the base metal-rich Deep Zone into a total global resource by Mineral Resource classification, results in a lower overall silver grade reflecting the blending of high and lower grade materials (see Table 4).

Table 4: Juanicipio Project Global Mineral Resource estimate and summary by vein (October 21, 2017):

Resource Category

Vein

Tonnes (Mt)

Ag (g/t)

Au (g/t)

Pb (%)

Zn (%)

Cu (%)

Metal Contained in Mineral Resource

Ag (Moz)

Au (Koz)

Pb (Mlbs)

Zn (Mlbs)

Cu

(Mlbs)

Indicated

V1E

6.35

528

1.86

1.89

3.81

0.09

108

379

264

533

12

V1W

6.48

327

2.35

2.34

3.55

0.18

68

488

334

507

26

Total Indicated

12.83

427

2.10

2.11

3.68

0.13

176

867

598

1,041

38

Inferred

V1E

3.18

121

0.95

2.14

3.60

0.54

12

97

150

253

38

V1W

3.74

155

1.88

3.18

5.97

0.26

19

226

262

492

21

HW

0.25

529

0.59

0.52

0.89

0.03

4

5

3

5

0

Vant

2.06

111

1.39

3.50

7.41

0.18

7

92

159

337

8

V2W (a)

0.61

330

1.37

2.44

3.41

0.14

7

27

33

46

2

V2W (b)

1.01

659

0.64

1.23

2.72

0.05

21

21

27

60

1

JV1

0.58

260

3.74

0.35

0.82

0.03

5

70

5

11

0

JV2

0.70

678

1.07

1.29

3.18

0.04

15

24

20

49

1

Total Inferred

12.13

232

1.44

2.46

4.68

0.27

91

562

658

Notes

1) Mineral Resources are not Mineral Reserves and do not have demonstrated economic viabilit

2) Valdecañas Vein System: V1W=Valdecañas West, V1E= Valdecañas East, V2W= footwall splay off V1W, VANT= Anticipada Vein, HW1=Hangingwall Vein; Juanicipio Vein System: JV1/2

3) Additional Notes -- see Notes to Table 3 above.

Mine Design and Process Plant

The principal mining method proposed in the 2017 PEA is longhole stoping with waste rock back-fill at a production rate of 4,000 tpd using modern mining equipment.

From the results of a series of trade-off studies previously commissioned by Minera Juanicipio, truck hauling, shaft hoisting, and conveying, along with underground crushing of the mineralized rock are all projected to be utilized for delivering the mineralized rock to the surface processing plant. An underground winze (internal shaft) is planned to be sunk within the hanging wall of the Valdecañas Vein System, to hoist mineralized rock from lower levels of the mine to the underground crusher and conveying system from the 6th year after plant start-up (projected as 2025), onward.

As envisioned in the 2017 PEA, the process plant is expected to ramp up operations over a three-year period to a steady state throughput rate of 1.4 million tonnes/year (4,000 tpd), and mill recoveries are estimated as:

  • 95% for Silver
  • 82% for Gold
  • 93% for Lead
  • 90% for Zinc

The proposed process plant and tailings storage facility will be located in newly acquired open, flat ground. It will include a SAG/Ball mill comminution circuit followed by sequential flotation to produce a silver-rich lead concentrate, a zinc concentrate and a gold-rich pyrite concentrate.

Additional Opportunities

The Mineral Resource used for the 2017 PEA mine design does not include any of the Juanicipio Vein resource which is included in the Mineral Resources above (Table 4). Further analysis is required to arrive at a potential extraction strategy, with the possibility that these resources may ultimately be brought into a future mining plan.

No copper circuit has been included in the 2017 PEA as no metallurgical testing and recovery assessment for copper has yet been completed.

LOM Payable Metal

Payable production for each metal is based on processing recoveries less smelter deductions and losses during third party treatment of the lead, zinc and pyrite concentrates, and is summarized in Table 5.

Table 5:Estimated LOM payable production by metal and by Silver equivalent ounces (Eq.oz.):

Metals from Concentrates (1)

Total Payable Metal Production

LOM

Average 1st

6 years

(2020-2025)

LOM Annual

Average

Peak Annual Production (Year)

Silver M oz.

183

16.5

9.6

20.1 (2021)

Gold K oz.

747

43.8

39.3

50.6 (2025)

Lead M lbs.

812

30.6

42.7

63.0 (2031)

Zinc M lbs.

1,327

54.3

69.8

95.9 (2031)

Silver Eq. (2) oz Payable (M )

352

24.2

18.5

26.5 (2023)

Footnotes:

1) Lead, Zinc, and Pyrite concentrates produced.
2) Silver Equivalent calculated using the Base Case metal recoveries and Base Case metal prices of $17.90/oz for silver; $1250/oz for gold; $0.95/lb for lead and $1.00/lb for zinc.

Cash Cost, Total Cash Costs and AISC per Ounce of Silver

The LOM Cash Cost (on-site and off-site, less by-product credits) is negative ($3.94)/oz of silver; Total Cash Costs (including taxes) is $2.39/oz of silver; and, AISC (including Total Cash Costs plus sustaining capital) total $5.02/oz of silver (see Table 6 below).

Table 6: Cash Costs, Total Cash Costs and AISC per oz of Silver (Base Case)

 

Cost/t of Mill Feed

Total $M

Cost Per Oz of Silver (1)

Operating costs

58.67

1,357

 

Offsite costs

41.32

956

Less: By Product Credits (2)

N/A

(3,033)

Cash Cost

 

(720)

$ (3.94)

Corporate tax (30%)

N/A

837

 

Special Mining Duty (7.5%)

N/A

299

Gold and Silver Gross Revenue Duty (0.5%)

N/A

21

Total Cash Cost

 

437

$ 2.39

Sustaining capital

N/A

480

 

AISC

 

917

$ 5.02

Footnotes

1) Based on 183 million ounces of payable silver production.

2) By-product revenue credits (Base Case): gold $934 million, lead $771 million, zinc $1.327 billion

Taxes

Income and other taxes (see Table 6 above) presented in the 2017 PEA are based on Mexican legislated tax rates and do not reflect any tax planning opportunities.

Feasibility Study

An independent feasibility study to be prepared by AMC was commissioned by Minera Juanicipio in the second half of 2017, and is expected to be completed in the second quarter of 2018. This study is required by the Minera Juanicipio Shareholders' Agreement in order to make a formal production decision. The feasibility study will not include Inferred Mineral Resources in the mine plan and is based on more detailed engineering which may result in changes in project's scope. As a result, the feasibility study will have a shorter mine life than envisioned in the 2017 PEA and the study is expected to contain an incremental increase in the estimated initial capital cost. With these and other possible scope changes, the project's modeled economics are expected to decrease as compared to those in the 2017 PEA (see 'Risks and Uncertainties' below). Upon completion of the feasibility study, Minera Juanicipio is expected to present the study to both its Board and the respective Joint Venture partner Boards for formal development approval. Although there is no certainty a production decision will be made, Fresnillo has publicly advised that it expects Minera Juanicipio to be in production by the first half of 2020, which is consistent with the timeline to production in the 2017 PEA.

Qualified Person:

All scientific or technical information on this Website, including assay results and reserve estimates, if applicable, is based upon information prepared by or under the supervision of, or has been approved by, Dr. Peter Megaw, Ph.D., C.P.G., a certified professional geologist who is a "Qualified Person" for purposes of National Instrument 43-101, Standards of Disclosure for Mineral Projects ("National Instrument 43-101" or "NI 43-101"). Dr. Megaw is not independent as he is an officer and a paid consultant of the Company.

Cautionary Note Regarding Forward-Looking Statements

Certain information contained on this website, including any information relating to the Company's future oriented financial information are forward-looking statements within the meaning of the US Private Securities Litigation Reform Act of 1995 and applicable Canadian securities laws (collectively "forward-looking statements"). All statements on this Website, other than statements of historical facts are forward-looking statements, including statements regarding the anticipated time and capital schedule to production; estimated project economics, including but not limited to, mill recoveries, payable metals produced, production rates, payback time, capital and operating and other costs, Internal Rate of Return ("IRR"), anticipated life of mine, and mine plan; expected upside from additional exploration; expected capital requirements; and other future events or developments. Forward-looking statements are often, but not always, identified by the use of words such as "seek", "anticipate", "plan", "continue", "estimate", "expect", "may", "will", "project", "predict", "potential", "targeting", "intend", "could", "might", "should", "believe" and similar expressions. These forward-looking statements involve known and unknown risks, uncertainties and other factors that may cause actual results or events to differ materially from results projected in such forward-looking statements. Although MAG believes the expectations expressed in such forward-looking statements are based on reasonable assumptions, such statements are not guarantees of future performance and actual results or developments may differ materially from those in the forward-looking statements. Factors that could cause actual results to differ materially from those in forward-looking statements including, but not limited to, commodities prices; changes in expected mineral production performance; unexpected increases in capital costs; exploitation and exploration results; continued availability of capital and financing; differing results and recommendations in the feasibility study commissioned by Minera Juanicipio; the lack of a formal production decision by Minera Juanicipio; risks related to holding a minority investment intertest in the Juanicipio Property; and general economic, market or business conditions. In addition, forward-looking statements are subject to various risks, including but not limited to operational risk; environmental risk, political risk; currency risk; capital cost inflation risk; that data is incomplete or inaccurate; the limitations and assumptions within drilling, engineering and socio-economic studies relied upon in preparing the 2017 PEA (as defined herein); and market risks. The reader is referred to the Company's filings with the SEC and Canadian securities regulators for disclosure regarding these and other risk factors. There is no certainty that any forward-looking statement will come to pass and investors should not place undue reliance upon forward-looking statements. The Company does not undertake to provide updates to any of the forward-looking statements on this Website, except as required by law.

Assumptions have been made including, but not limited to, the Company's ability to carry on its various exploration and development activities including project development timelines, the timely receipt of required approvals and permits, the price of the minerals the Company produces, the costs of operating, exploration and development expenditures, the impact on operations of the Mexican Tax Regime, and the Company's ability to obtain adequate financing. The Company cannot assure you that actual events, performance or results will be consistent with these forward-looking statements, and management's assumptions may prove to be incorrect. The forward-looking statements on this Website speak only as of the date hereof and we do not assume any obligation to update forward-looking statements if circumstances or management's beliefs, expectations or opinions should change other than as required by applicable law. There is no certainty that any forward-looking statement will come to pass and investors should not place undue reliance upon forward-looking statements.

Note Regarding Non-GAAP Measures

This Website presents certain financial performance measures, including all in sustaining costs ("AISC"), cash cost and total cash cost that are not recognized measures under International Financial Reporting Standards as issued by the International Accounting Standards Board ("IFRS"). This data may not be comparable to data presented by other silver producers. The Company believes that these generally accepted industry measures are realistic indicators of potential operating performance and are useful in allowing comparisons with other silver producers. Non-GAAP financial performance measures should be considered together with other data prepared in accordance with IFRS. This Website contains non-GAAP financial performance measure information for a project under development incorporating information that will vary over time as the project is developed and mined. It is therefore not practicable to reconcile these forward-looking non-GAAP financial performance measures.

Cautionary Note to Investors Concerning Estimates of Indicated and Inferred Mineral Resources

This Website uses the terms "Indicated Mineral Resources" and "Inferred Mineral Resources". MAG advises investors that although these terms are recognized and required by Canadian regulations (under National Instrument 43-101 Standards of Disclosure for Mineral Projects), the U.S. Securities and Exchange Commission does not recognize these terms. Investors are cautioned not to assume that any part or all of the mineral deposits in these categories will ever be converted into reserves. In addition, "Inferred Mineral Resources" have a great amount of uncertainty as to their existence. It cannot be assumed that all or any part of an Inferred Mineral Resource will ever be upgraded to a higher category. Under Canadian rules, estimates of Inferred Mineral Resources are considered too speculative geologically to have the economic considerations applied to them to enable them to be categorized as mineral reserves and, accordingly, Inferred Mineral Resources may not form the basis of feasibility or pre-feasibility studies, or economic studies except for a "Preliminary Economic Assessment" as defined under NI 43-101. Investors are cautioned not to assume that part or all of an Inferred Resource exists, or is economically or legally mineable.

Story of Juanicipio

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