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Brazil
Jacobina Mine

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 Location:
8 km S from Jacobina, Brazil

  Address:
Fazenda Itapicuru, s/n
Jacobina
Brazil
44700-000
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  • Overview
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  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
Mining Method
  • Sub-level stoping
Production Start...
Mine Life20 years (as of Jan 1, 2020)
The Phase 2 expansion at Jacobina was successfully completed in the third quarter 2022, with the mine achieving a sustained throughput rate of over 8,600 tpd in each of the three months, exceeding the Phase 2 throughput objective of 8,500 tpd and establishing Jacobina’s sustainable production profile at 230,000 ounces of gold per year, as grades will increase in 2023 due to the reduction of reliance on stockpiles, combined with access to higher grade zones.

As the Phase 2 expansion, which has now been completed, was advancing ahead of schedule, the Company has begun pursuing the Phase 3 expansion to 10,000 tpd through continued incremental debottlenecking. With the permit to 10,000 tpd already in hand, Phase 3 is expected to increase gold production to approximately 270,000 ounces per year by 2025 with a modest capital expenditure of $20 million to $30 million.
? The Phase 4 expansion, of up to 15,000 tpd, would increase gold production in excess of 350,000 ounces per
year. To ac


Owners

Source: p. 13
CompanyInterestOwnership
Yamana Gold Inc. 100 % Indirect
Yamana Gold Inc. (Yamana) holds a 100% interest in the property through its subsidiary, Jacobina Mineração e Comércio S. A. (JMC).

Contractors

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Deposit Type

  • Conglomerate hosted
  • Paleoplacer


Summary:

The mineralization at Jacobina consists of conglomerate-hosted gold deposits generally interpreted to represent paleoplacer gold deposits, with some post-depositional modification by structural and hydrothermal events.

The Jacobina gold district is defined by a 40-km long belt that extends from Campo Limpo, in the south, to Santa Cruz do Coqueiro, in the north. The vast majority of significant gold mineralization occurs within the matrix of the conglomerates; these include the Canavieiras, Morro do Vento, João Belo, Serra Branca deposits as well as other minor occurrences.

The gold mineralization found at Jacobina occurs as two styles of mineralization (Texeira et al, 2001):
• Conglomerate-hosted placer gold mineralization (the most important mineralization type in the Jacobina district)
• Post-depositional gold-bearing stockwork, shear zones, and associated extensional quartz veins. These styles of mineralization are relatively minor and do not contribute to the established resources at Jacobina.

CONGLOMERATE-HOSTED PLACER GOLD MINERALIZATION
Conglomerate-hosted deposits contain very fine grains of native gold, typically 20 to 50 µm in size, hosted in the matrix of the conglomerate. Gold may also be associated with rounded pyritic aggregates believed to be of sedimentary origin. There are no other significant elements present, with detailed studies of the reef chemistry showing only very minor enrichment in iron, titanium and ........


Mining Methods

  • Sub-level stoping


Summary:

Jacobina utilizes the sublevel longhole stoping (SLS) method without backfill to achieve an average production rate of approximately 6,500 tpd from the ramp-accessed underground mines; these include João Belo, Canavieiras, Serra do Córrego, Morro do Cuscuz, and Morro do Vento.

The SLS method uses fan drilling. Production drill holes vary from 76 to 112.5 mm in diameter and are drilled using three types of fan drills; these include the Solo 5 7F, the Solo DL 420, and the Solo DL 421. For the most part, drill holes are no longer than 25 m, which helps control deviation. Backfill is not required for the SLS mining method as the stopes are supported by pillars left in place. However, development waste is increasingly being deposited in underground voids.

The Phase 2 expansion is planned for completion in mid-2022 and will increase throughput to 8,500 tpd, raising annual production to 230,000 ounces by 2023. Beyond Phase 2, the Company plans to implement a Phase 3 expansion which, for a modest cost, would increase throughput to 10,000 tpd and raise annual production to 270,000 ounces.

Ramp access to the mineralized zones allows for a high degree of flexibility.

Yamana is reviewing alternative mining methods and testing the suitability of the Jacobina tailings for paste fill or hydraulic fill applications. The results will be considered in a conceptual study that will evaluate the potential for constructing a fill plant at Jacobina. The u ........


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityUnits2022202120202019201820172016
Gold koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required145136120
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
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Operational Metrics:

Metrics202120202019201820172016
Ore tonnes mined  ......  Subscription required  ......  Subscription required2,298,631 t2,093,413 t2,007,572 t1,803,064 t
Tonnes processed  ......  Subscription required  ......  Subscription required2,254,793 t2,035,214 t1,978,409 t1,802,914 t
Daily processing rate  ......  Subscription required  ......  Subscription required
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Reserves at December 31, 2021:
Underground reserves are reported at variable cut-off grades by zone ranging from 0.92 g/t gold to 1.01 g/t gold.

Underground resources are reported at variable cut-off grades by zone ranging from 0.69 g/t gold to 0.76 g/t gold.

CategoryTonnage CommodityGradeContained Metal
Proven 28,910 kt Gold 2.17 g/t 2,015 koz
Probable 13,101 kt Gold 2.19 g/t 923 koz
Proven & Probable 42,011 kt Gold 2.18 g/t 2,938 koz
Measured 30,281 kt Gold 2.4 g/t 2,339 koz
Indicated 19,372 kt Gold 2.36 g/t 1,468 koz
Measured & Indicated 49,652 kt Gold 2.38 g/t 3,807 koz
Inferred 25,018 kt Gold 2.37 g/t 1,904 koz

Commodity Production Costs:

CommodityUnits2022202120202019201820172016
Cash costs (sold) Gold USD  ......  Subscription required&nbs  ......  Subscription required  ......  Subscription required  ......  Subscription required 675 / oz  
Cash costs Gold USD 649 / oz   701 / oz   692 / oz  
All-in sustaining costs (sold) Gold USD  ......  Subscription required&nbs  ......  Subscription required  ......  Subscription required  ......  Subscription required 891 / oz  
All-in sustaining costs (AISC) Gold USD 802 / oz   867 / oz   988 / oz  
^ Guidance / Forecast.
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Financials:

Units2022202120202019201820172016
Capital expenditures (planned) M USD  ......  Subscription required
Sustaining costs M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 21   21.7   35  
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 47.5   45.1   46.1  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 179.4   170.8   145.5  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 192.3   27.4   18.8  
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Heavy Mobile Equipment as of December 31, 2019:
HME TypeQuantityLeased or
Contractor
Backhoe ....................... Subscription required Leased
Drill ....................... Subscription required Leased
Grader ....................... Subscription required Leased
Jumbo ....................... Subscription required Leased
Loader (FEL) ....................... Subscription required Leased
Load-Haul-Dump (LHD) ....................... Subscription required Leased
Scissor Lift ....................... Subscription required Leased
Shotcreter ....................... Subscription required Leased
Truck (haul) ....................... Subscription required Leased
Truck (water) ....................... Subscription required Leased
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 1, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 1, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 1, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 1, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 1, 2022
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Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... 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
Annual Information Form 2018
Annual Report 2018
Press Release 2018
Financial Review 2017
Management Discussion & Analysis 2017
Annual Report 2016
Annual Report 2015
Technical Report 2014
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