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Peru
Yauricocha Mine (Yauricocha Expansion Project)

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 Location:
64 km SW from Jauja, Peru
  Regional Office:
Av. Pedro de Osma 450 Barranco
Lima
Peru
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Fax+51-1-467-2865
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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
  • Lead
  • Zinc
  • Copper
  • Gold
Mining Method
  • Overhand Cut & Fill
  • Sub-level caving
  • Backfill
Production Start...
Mine Life11 years (as of Jan 1, 2021)
Throughput from the Yauricocha mine was severely impacted in Q4 2022 by the mudslide incident that occurred at the end of Q3 2022 followed by a road blockade by the local communities.

The Yauricocha mine is expected to gradually and safely ramp up production throughout 2023 at the current depth. Meanwhile, Yauricocha’s focus will remain on obtaining the necessary permits to access the deeper, high-grade ore bodies.

Owners

Source: p. 24
CompanyInterestOwnership
Sierra Metals Inc. 81.84 % Indirect
Sociedad Minera Corona, SA (operator) 100 % Direct
Ownership Tree
Sierra Metals Inc. owns 81.84% of Minera Corona, which in turn owns 100% of the Yauricocha Mine.

Contractors

Subscription required - Subscription is required.

Deposit Type

  • Manto
  • Hydrothermal
  • Vein / narrow vein

Summary:

The Yauricocha Mine features several mineralized bodies, which have been emplaced along structural trends, with the mineralization itself related to replacement of limestones by hydrothermal fluids related to nearby intrusions. The mineralization varies widely in morphology, from large, relatively wide, tabular manto-style deposits to narrow, sub-vertical chimneys. The mineralization features economic grades of Ag, Cu, Pb and Zn, with local Au to a lesser degree. The majority of the deposits are related to the regional high-angle NW-trending Yauricocha fault or the NE-trending and less well-defined Cachi-Cachi structural trend. The mineralization generally presents as polymetallic sulfides but is locally oxidized to significant depths or related to more Cu-rich bodies. Goyllarisquizga Formation The oldest rocks exposed in the area are the lower Cretaceous Goyllarisquizga arenites. This formation is approximately 300 m thick and comprises thick gray and white arenites, locally banded with carbonaceous lutites as well as small mantos of low-quality coal beds and clay. In the vicinity of Chaucha, these arenites have near their base interbedded, red lutite. The arenites crop out in the cores of the anticlines southwest of Yauricocha, as beds dispersed along the Chacras uplift, and isolated outcrops in the Éxito zone. Jumasha Formation The mid-Cretaceous Jumasha Formation consists of massive gray limestone, averages 700 m thick, and concordantly overlies the Goyllarisquizga Form ........

Mining Methods

  • Overhand Cut & Fill
  • Sub-level caving
  • Backfill

Summary:

The Yauricocha Mine is a producing operation with a long production history. Most of the mining is executed through mechanized sub-level caving with a relatively small portion of the mining using overhand cut and fill. The mine uses well-established, proven mining methods and is planning to increase the production rate to 5,500 tpd (2.0 Mt/y) in 2024.

The mine is accessed by two shafts, Central shaft and Mascota shaft, and the Klepetko and Yauricocha tunnels. Mineralized material and waste are transported via the Klepetko tunnel at the 720 level (elevation 4,165 masl) which runs east-northeast from the mine towards the mill and concentrator, and the 4.7 km Yauricocha tunnel, commissioned in 2018, that also accesses the mine at the 720 level. The Yauricocha tunnel was added to increase haulage capacity and serves as a ventilation conduit. The Yauricocha shaft, currently under construction, will provide access down to 1270 level and is expected to be in production in 2025.

Mechanized sub-level caving (SLC) and overhand mechanized cut and fill (MCF) mining methods are currently used in the mine to achieve production with most of the production by SLC mining methods.SLC is the primary mining method at Yauricocha, representing 84% of the annual production.

SLC mining areas have historically been established by developing three sub-levels for each 50m main level via ramps. This results in a planned 16.7 m sub-level spacing which are called pisos ( ........

Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Production:
Lower production numbers in 2022 due to the suspension of operations at the Yauricocha Mine during September.

CommodityProductUnits2023202220212020201920182017
Copper Equivalent Metal in concentrate k lbs  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Metal in concentrate koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Lead Concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Lead Metal in concentrate M lbs  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Zinc Concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Zinc Metal in concentrate M lbs  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Copper Metal in concentrate M lbs  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Copper Concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold Metal in concentrate oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Copper Equivalent Payable metal k lbs  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Zinc Equivalent Metal in concentrate k lbs  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Equivalent Metal in concentrate koz
^ Guidance / Forecast.
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Operational Metrics:

Metrics202220212020201920182017
Daily processing rate  ......  Subscription required  ......  Subscription required3,194 t3,191 t3,162 t2,924 t
Daily processing capacity  ......  Subscription required  ......  Subscription required3,150 t3,150 t3,150 t3,000 t
Ore tonnes mined  ......  Subscription required  ......  Subscription required1,081,029 dmt1,127,480 dmt1,074,475 dmt1,009,635 dmt
Tonnes processed  ......  Subscription required  ......  Subscription required1,117,860 t1,116,919 t1,106,649 t1,023,491 t
Waste  ......  Subscription required  ......  Subscription required324,665 t
Subscription required - Subscription is required.

Reserves at December 31, 2022:

CategoryTonnage CommodityGradeContained Metal
Measured & Indicated 12,324 kt Silver 43 g/t 17 M oz
Measured & Indicated 12,324 kt Lead 0.58 % 159 M lbs
Measured & Indicated 12,324 kt Zinc 2.03 % 552 M lbs
Measured & Indicated 12,324 kt Copper 1.19 % 325 M lbs
Measured & Indicated 12,324 kt Gold 0.53 g/t 208 koz
Measured & Indicated 12,324 kt Zinc Equivalent 5.86 % 1,591 M lbs
Inferred 11,566 kt Silver 29 g/t 11 M oz
Inferred 11,566 kt Lead 0.32 % 83 M lbs
Inferred 11,566 kt Zinc 1.03 % 262 M lbs
Inferred 11,566 kt Copper 1.4 % 358 M lbs
Inferred 11,566 kt Gold 0.44 g/t 162 koz
Inferred 11,566 kt Zinc Equivalent 4.87 % 1,242 M lbs

Commodity Production Costs:

CommodityUnits2023202220212020201920182017
Cash costs (sold) Copper Equivalent USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 1.18 / lb   1.07 / lb  
Cash costs (sold) Zinc Equivalent USD  ......  Subscription required  ......  Subscription required 0.52 / oz   0.5 / lb  
Cash costs (sold) Silver Equivalent USD  ......  Subscription required  ......  Subscription required 6.22 / oz   6.51 / oz  
All-in sustaining costs (sold) Copper Equivalent USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 1.66 / lb   1.66 / lb  
All-in sustaining costs (sold) Zinc Equivalent USD  ......  Subscription required  ......  Subscription required 0.73 / lb   0.78 / lb  
All-in sustaining costs (sold) Silver Equivalent USD  ......  Subscription required  ......  Subscription required 8.77 / oz   10.1 / oz  
^ Guidance / Forecast.
Subscription required - Subscription is required.

Operating Costs:

Units20222021202020192018201720162015
Total operating costs ($/t milled) USD 72.1  61.5  57.6  70.9  63.2  62.4  55.8  52.7  

Financials:

Units2023202220212020201920182017
Capital expenditures (planned) M USD  ......  Subscription required
Sustaining costs M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 7.2   11.6  
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 25.2   18.7  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 168.7   154.2  
Gross profit M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 76.1   42.4  
After-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 34.9   18  
EBITDA M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 79.5   74.8  
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Water Supply
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- subscription is required.

Heavy Mobile Equipment as of March 31, 2021:
HME TypeSizeQuantity
Backhoe ....................... Subscription required
Bolter ....................... Subscription required
Drill ....................... Subscription required
Drill ....................... Subscription required
Drill (long hole) ....................... Subscription required
Grader ....................... Subscription required
Loader ....................... Subscription required
Load-Haul-Dump (LHD) ....................... Subscription required
Load-Haul-Dump (LHD) ....................... Subscription required
Personnel Carrier ....................... Subscription required
Shotcreter ....................... Subscription required
Trans Mixer 4.5 cu. m ....................... Subscription required
Truck (dump) 15 t ....................... Subscription required
Truck (dump) 20 t ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jun 2, 2023
....................... Subscription required ....................... Subscription required Subscription required Jun 2, 2023
....................... Subscription required ....................... Subscription required Subscription required Jun 2, 2023
....................... Subscription required ....................... Subscription required Subscription required Jun 2, 2023
....................... Subscription required ....................... Subscription required Subscription required Jun 2, 2023
....................... Subscription required ....................... Subscription required Subscription required Jun 2, 2023
....................... Subscription required ....................... Subscription required Subscription required Jun 2, 2023
....................... Subscription required ....................... Subscription required Subscription required Jun 2, 2023
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2022
Subscription required Subscription required Subscription required 2021
Subscription required Subscription required Subscription required 2020
Subscription required Subscription required Subscription required 2019
Subscription required Subscription required Subscription required 2018
Subscription required Subscription required Subscription required 2017
Subscription required Subscription required Subscription required 2016
Subscription required 2015

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2023
Annual Information Form 2022
Annual Report 2022
Management Discussion & Analysis 2022
Press Release 2022
................................... 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 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Corporate Presentation 2018
Management Discussion & Analysis 2018
Preliminary Economic Assessment 2018
Press Release 2018
Annual Report 2017
Corporate Presentation 2017
Management Discussion & Analysis 2017
Press Release 2017
Technical Report 2017
Annual Information Form 2016
Corporate Presentation 2016
Corporate Presentation 2016
Management Discussion & Analysis 2016
Press Release 2016
Technical Report 2016
Management Discussion & Analysis 2015
Press Release 2015
Management Discussion & Analysis 2014
Technical Report 2014
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