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Peru
Uchucchacua Mine

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 Location:
9 km NE from Oyon, Peru
  Address:
Las Begonias 415, 20th Floor. San Isidro
Lima
Peru
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News
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Overview

StatusTemporary Suspension
Mine TypeUnderground
Commodities
  • Silver
  • Zinc
  • Lead
  • Manganese
Mining Method
  • Bench & Fill
  • Overhand Cut & Fill
  • Hydraulic backfill
Production Start...
Mine Life2028
The Uchucchacua mining unit includes the Yumpag project.

Production in Uchuchacua has been temporarly suspended since September 2021 and it is planned to resume in October 2023.

Yumpag project construction and permitting continue according to schedule. Production is subject to permit approval, which is expected to be granted during 2H23 to then begin ore production and haulage to Uchucchacua´s processing plant. Once adequate ore stockpiles have been reached, processing is expected to begin between 4Q23 and 1Q24.

Owners

Source: p. 38
CompanyInterestOwnership
Compania de Minas Buenaventura S.A.A. (operator) 100 % Indirect
The Uchucchacua mine is wholly-owned and operated by Buenaventura.

Contractors

Subscription required - Subscription is required.

Deposit Type

  • Carbonate replacement
  • Epithermal
  • Vein / narrow vein

Summary:

Deposit Type
Uchucchacua is a polymetallic epithermal deposit of veins (fracture filling) and metasomatic replacement, emplaced in carbonate rocks of the Jumasha Formation. Mineralization is complex, occurring in multiple stages or pulses, controlled by well-defined vein structures, replacement bodies or shoots and skarn.

Mineralization
Uchucchacua is a polymetallic deposit associated with replacement bodies and veins. Its mineralization (Ag, Zn, Pb, Fe and Mn) is located in a sequence of carbonate rocks of the Upper Cretaceous Jumasha Formation.

The mineralization processes at Uchucchacua have been complex and multiple, therefore its mineralogy is unusually varied. Among the main mineral groups are: Oxides, Silicates, Carbonates, Sulfides and Sulfosalts. Among the main ore minerals, we have: Galena, Proustite, Argentite, Pyrargyrite, Native Silver, Sphalerite, Marmatite, Jamesonite, Polybasite, Boulangerite, Chalcopyrite, Covellite, Jalpaite, Stromeyerite, Golfieldite. Gangue minerals include Pyrite, Alabandite, Rhodochrosite, Calcite, Pyrrhotite, Fluorite, Psilomelane, Pyrolusite, Johansonite, Bustamite, Arsenopyrite, Marcasite, Magnetite, Stibnite, Quartz, Orpiment, Realgar, Benavidesite, Tephroite and Gypsum.

The style of mineralization, in general, is given by fracture filling and metasomatic replacement.

It is important to mention that the silver mineralization with base metals is mainly embedded in rocks of the Juma ........

Mining Methods

  • Bench & Fill
  • Overhand Cut & Fill
  • Hydraulic backfill

Summary:

At the operational level, the Uchucchacua mining unit is divided into five sectors, which are listed below:
-Socorro (Alto)
-Socorro (Bajo)
-Casualidad
-Huantajalla
-Carmen.

Since the beginning of the Uchucchacua operation, the mining method applied has been Cut and Fill. In recent years, a variant of the OCF has been applied to all sectors of the mine- the Bench and Fill (B&F) method- which was mainly used in the Socorro Bajo sector, where this method is 100% applied. This has allowed productivity and production levels to rise.

The Uchucchacua mining unit applies two underground mining methods:
-Bench & Fill with long holes. This method corresponds to an adaptation of sublevel stoping (SLS).
-Overhand Cut & Fill (OCF) with stoping-like vertical raiseboring.

A. Bench & Fill (B&F)
Bench & fill entails longitudinal mining of the vein. A lower and upper sublevel are built, and leaving an ore bench between them, which is mined by long-hole drilling. As the ore is broken from the bench on one face and the ore is cleaned from the lower sublevel, the stope is backfilled from the upper sublevels with detrital fill.

B. Overhand Cut and Fill (OCF)
Overhand Cut and Fill basically involves two activities:
-Stoping: sub-vertical drilling
-Backfill: 80% of the backfill is detrital fill from development/preparations and 20% is hydraulic fill.

In this method, the ore is fra ........

Crushing and Grinding
Source: Subscription required

Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.

Production:
Operations were suspended in September 2021.

CommodityProductUnits202120202019201820172016
Silver Metal in concentrate oz  ......  Subscription required  ......  Subscription required  ......  Subscription required15,420,10216,583,69816,212,746
Zinc Metal in concentrate t  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Zinc Concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required
Lead Metal in concentrate t  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Manganese Sulphate t  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Operational Metrics:

Metrics202220212020201920182017
Daily processing capacity  ......  Subscription required  ......  Subscription required4,200 t4,000 t4,000 t4,000 t
Daily ore mining rate  ......  Subscription required  ......  Subscription required
Daily mining capacity  ......  Subscription required  ......  Subscription required
Tonnes milled  ......  Subscription required  ......  Subscription required550,718 t1,335,018 t1,387,775 t1,364,478 t
Ore tonnes mined  ......  Subscription required  ......  Subscription required550,718 t1,335,018 t1,387,775 t1,364,478 t
Subscription required - Subscription is required.

Reserves at December 31, 2022:

CategoryTonnage CommodityGradeContained Metal
Proven & Probable 5,716,401 t Silver 324.16 g/t 59,576,790 oz
Proven & Probable 5,716,401 t Zinc 1.97 % 112,968 t
Proven & Probable 5,716,401 t Lead 1.16 % 66,267 t
Measured & Indicated 2,642,249 t Silver 280.91 g/t 23,863,717 oz
Measured & Indicated 2,642,249 t Zinc 1.66 % 43,845 t
Measured & Indicated 2,642,249 t Lead 0.99 % 26,034 t
Inferred 7,217,446 t Silver 372.99 g/t 86,550,876 oz
Inferred 7,217,446 t Zinc 2.17 % 156,619 t
Inferred 7,217,446 t Lead 1.47 % 106,096 t

Commodity Production Costs:

CommodityUnits202120202019201820172016
Cash costs (sold) Lead USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 1,354 / t   1,571 / t   1,214 / t  
Cash costs (sold) Zinc USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 1,983 / t   2,951 / t   2,223 / t  
Cash costs (sold) Silver USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 10.4 / oz   10.6 / oz   11 / oz  
Subscription required - Subscription is required.

Financials:

Units2022202120202019201820172016
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 18.4   18.1   28.9  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 257.3   272.3   240.5  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 6.3   38.7   54.6  
Gross profit M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 56.1   75.8   70.3  
Pre-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 6.2   38.5   54.1  
After-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 5.4   37.4   52.2  
Book Value M USD  ......  Subscription required
Subscription required - Subscription is required

Water Supply
Source: Subscription required

- subscription is required.

Heavy Mobile Equipment as of October 15, 2021:
HME TypeModelSizeQuantityLeased or
Contractor
Bolter ....................... Subscription required 8 ft ....................... Subscription required Leased
Bolter ....................... Subscription required 10 ft ....................... Subscription required Leased
Jumbo 20 m ....................... Subscription required Leased
Jumbo ....................... Subscription required 8 ft ....................... Subscription required Leased
Jumbo ....................... Subscription required 8 ft ....................... Subscription required Leased
Jumbo ....................... Subscription required 10 ft ....................... Subscription required Leased
Jumbo ....................... Subscription required 6 ft ....................... Subscription required Leased
Jumbo ....................... Subscription required 6 ft ....................... Subscription required Leased
Jumbo ....................... Subscription required 12 ft ....................... Subscription required Leased
Jumbo ....................... Subscription required 12 ft ....................... Subscription required Leased
Jumbo ....................... Subscription required 12 ft ....................... Subscription required Leased
Jumbo ....................... Subscription required 12 ft ....................... Subscription required Leased
Jumbo ....................... Subscription required 14 ft ....................... Subscription required Leased
Jumbo ....................... Subscription required 14 ft ....................... Subscription required Leased
Scaler ....................... Subscription required ....................... Subscription required Leased
Scoop Tram ....................... Subscription required 2.2 cu. yd ....................... Subscription required Leased
Scoop Tram ....................... Subscription required 2.2 cu. yd ....................... Subscription required Leased
Scoop Tram ....................... Subscription required 6 cu. yd ....................... Subscription required Leased
Scoop Tram ....................... Subscription required 6.1 cu. yd ....................... Subscription required Leased
Scoop Tram ....................... Subscription required 4.1 cu. yd ....................... Subscription required Leased
Scoop Tram ....................... Subscription required 6 cu. yd ....................... Subscription required Leased
Scoop Tram ....................... Subscription required 4.1 cu. yd ....................... Subscription required Leased
Scoop Tram ....................... Subscription required 4.1 cu. yd ....................... Subscription required Leased
Scoop Tram ....................... Subscription required 4.1 cu. yd ....................... Subscription required Leased
Telescopic Handler 0.27 t ....................... Subscription required Leased
Telescopic Handler ....................... Subscription required 3 t ....................... Subscription required Leased
Truck (dump) ....................... Subscription required ....................... Subscription required Leased
Truck (dump) ....................... Subscription required ....................... Subscription required Leased
Truck (dump) ....................... Subscription required 20 t ....................... Subscription required Leased
Truck (dump) ....................... Subscription required 20 t ....................... Subscription required Leased
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jun 25, 2023
....................... Subscription required ....................... Subscription required Subscription required Jun 25, 2023
....................... Subscription required ....................... Subscription required Subscription required Jun 25, 2023
....................... Subscription required ....................... Subscription required Subscription required Jun 25, 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 2017
Subscription required 2016

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2023
Annual Report 2022
Corporate Presentation 2022
Form 20-F 2022
Pre-Feasibility Study Report 2022
Quarterly Report 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Form 20-F 2018
Press Release 2018
Quarterly Report 2018
Form 20-F 2017
Annual Report 2016
Form 20-F 2016
Press Release 2016
Form 20-F 2015
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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