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Mexico
San Jose Mine

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 Location:
40 km S from Oaxaca, Oaxaca, Mexico

  Address:
Carretera 175 Oaxaca-Huatulco
San José del Progreso
Oaxaca, Mexico
68050
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Silver
  • Gold
Mining Method
  • Overhand Cut & Fill
  • Room-and-pillar
  • Paste backfill
  • Dry waste backfill
Production Start...
Mine Life3 years (as of Jan 1, 2021)
On December 20, 2021 the Fortuna resolved an outstanding permit issue at the San Jose mine and received approval for the extension of its Environmental Impact Authorization (“EIA”). The extension of the EIA provided the Company with access to the full $200.0 million of the Amended Credit Facility.
Latest NewsFortuna provides update on San Jose’s Environmental Impact Authorization     January 25, 2023


Owners

Source: p. 14,15,52
CompanyInterestOwnership
Fortuna Silver Mines Inc. 100 % Indirect
The San Jose underground mine is operated by Compania Minera Cuzcatlan S.A. de C.V., a Mexican subsidiary 100 percent owned by Fortuna.

Contractors

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Deposit Type

  • Epithermal
  • Vein / narrow vein
  • Breccia pipe / Stockwork


Summary:

The Trinidad silver-gold deposit at the San Jose Mine is a typical low-sulfidation epithermal deposit according to the classification of Corbett (2002), having formed in a relatively low temperature, shallow crustal environment. The deposit is characterized by structurally controlled hydrothermal breccias, crackle breccias and quartz-carbonate veins hosting silver-gold mineralization plus trace to minor base metal mineralization.

Precious metal mineralization at the San Jose Mine is hosted by hydrothermal breccias, crackle breccias, quartz-carbonate veins and zones of sheeted and stockwork-like quartz-carbonate veins emplaced along steeply dipping north and north-northwest trending fault structures.

The mineralized structural corridor extends for greater than 3 km in a north–south direction and has been divided into two sectors. The Trinidad Deposit area located between 1846500N and 1847800N, and the San Ignacio area located between 1845000N and 1846500N. The Victoria mineralized zone is located approximately 350 m to the east of the Trinidad Deposit.

The major mineralized structures or vein systems recognized in the Trinidad Deposit area are the Trinidad and Bonanza structures and the Stockwork zones. In addition to the major mineralized structures, secondary vein systems are present between the Trinidad and Bonanza systems and locally in the hanging wall to the Bonanza system and also in the footwall to the Trinidad system. To-date, drillin ........


Mining Methods

  • Overhand Cut & Fill
  • Room-and-pillar
  • Paste backfill
  • Dry waste backfill


Summary:

The method chosen for underground mining is overhand cut-and-fill which removes ore in horizontal slices, starting from the bottom undercut and advancing upwards. When ore widths are greater than 8 m, a combination of overhan cut-and-fill and room-and-pillar methods has been selected as the most appropriate for the conditions encountered.

Mechanized mining uses a Jumbo drill rig to drill blast holes, scoop trams for loading and trucks for ore haulage. Rock support is provided through rock bolts and shotcrete. The deposit width ranges from 4.5 m to 17 m for the Bonanza and Trinidad vein systems and can be more than 30 m in the Stockwork Zone. Mechanized mining is regarded as the only methodology suitable for all veins based on the geological structure and geotechnical studies to date. The mechanized mining sequence includes: drilling (with a Jumbo drill rig), blasting, support, loading (by scoop tram) and haulage:

1. Ore is extracted from the stope in horizontal slices that span the entire width and length of the stope using pivot cuts of up to ±15 % gradient.

2. After the stope has been mined out, voids are backfilled with paste or waste rock. The key performance indicators for this activity sets 85 t/h production rates for rock waste and 100 to 150 t/h for paste fill.

3. Drilling of horizontal slices is conducted in sections of 6 m by 6 m by mechanized jumbos which have a boom length of 5 m.

4. The blast pattern is c ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:

CommodityProductUnits2022202120202019201820172016
Silver Metal in concentrate koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required7,9807,5276,124
Gold Metal in concentrate koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Equivalent Payable metal oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Concentrate kt
^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202220212020201920182017
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required1,068,722 t1,040,478 t1,070,790 t
Daily milling rate  ......  Subscription required  ......  Subscription required  ......  Subscription required3,028 t2,956 t3,044 t
Daily mining capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required3,000 t of ore3,000 t of ore
Daily milling capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required3,000 t3,000 t3,000 t
^ Guidance / Forecast.
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Reserves at December 31, 2021:
Proven and Probable Reserves are reported at a 111 to 122 g/t Ag Eq cut-off grade and Inferred Resources are reported at a 100 g/t Ag Eq cut-off grade.

CategoryTonnage CommodityGradeContained Metal
Proven 75 kt Silver 205 g/t 0.5 M oz
Proven 75 kt Gold 1.4 g/t 3 koz
Probable 2,914 kt Silver 180 g/t 16.8 M oz
Probable 2,914 kt Gold 1.17 g/t 109 koz
Proven & Probable 2,989 kt Silver 180 g/t 17.3 M oz
Proven & Probable 2,989 kt Gold 1.17 g/t 113 koz
Measured 38 kt Silver 121 g/t 0.2 M oz
Measured 38 kt Gold 0.82 g/t 1 koz
Indicated 901 kt Silver 98 g/t 2.8 M oz
Indicated 901 kt Gold 0.65 g/t 19 koz
Measured & Indicated 940 kt Silver 99 g/t 3 M oz
Measured & Indicated 940 kt Gold 0.66 g/t 20 koz
Inferred 3,011 kt Silver 125 g/t 12.1 M oz
Inferred 3,011 kt Gold 0.93 g/t 90 koz

Commodity Production Costs:

CommodityUnits2022202120202019201820172016
Total cash costs Silver Equivalent USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 5.93 / oz   6.1 / oz  
Total cash costs Silver USD 0.69 / oz†   0.95 / oz†   1.77 / oz†  
All-in sustaining costs (sold) Silver Equivalent USD  ......  Subscription required&nbs  ......  Subscription required  ......  Subscription required
All-in sustaining costs (AISC) Silver Equivalent USD  ......  Subscription required  ......  Subscription required 9.02 / oz   10.1 / oz  
All-in sustaining costs (AISC) Silver USD 5.45 / oz†   7.11 / oz†   7.58 / oz†  
All-in costs Silver Equivalent USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 9.03 / oz   10.1 / oz  
All-in costs Silver USD 5.47 / oz†   7.12 / oz†   10.6 / oz†  
^ Guidance / Forecast.
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units2021202020192018201720162015
UG mining costs ($/t milled) USD 38.73636.330.932.530.4
Processing costs ($/t milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Financials:

Units2022202120202019201820172016
Capital expenditures (planned) M USD  ......  Subscription required
Sustaining costs M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 9.3   18,385   12.3  
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 16.2   24.8   36.8  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 180.2   180   143.2  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 57.9   65.2   55.6  
Pre-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 59   55.3   55.3  
After-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 40.5   44.4   33.3  
EBITDA M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 92.2   99.9   81.1  
Subscription required - Subscription is required



Heavy Mobile Equipment as of February 22, 2019:
HME TypeSizeQuantity
Backhoe 90 HP ....................... Subscription required
Drill jumbo (single boom) ....................... Subscription required
Drill jumbo (two boom) ....................... Subscription required
Rock bolter ....................... Subscription required
Scaler ....................... Subscription required
Scissor Lift ....................... Subscription required
Scoop Tram 6 cu. yd ....................... Subscription required
Trans Mixer ....................... Subscription required
Truck (haul) ....................... Subscription required
Truck (service) ....................... Subscription required
Truck (underground) 14 cu. m ....................... Subscription required
Truck (underground) 7 cu. m ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Aug 17, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 27, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 27, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 27, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 27, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 27, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 27, 2022
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2019

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Financial Review 2018
Management Discussion & Analysis 2018
Press Release 2018
Corporate Presentation 2017
Management Discussion & Analysis 2017
Form 40-F 2016
Management Discussion & Analysis 2016
Technical Report 2016
Management Discussion & Analysis 2014
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News:

NewsDate
Fortuna provides update on San Jose’s Environmental Impact Authorization January 25, 2023
Fortuna challenges decision to re-assess extension of San Jose Mine Environmental Impact Authorization January 5, 2023

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