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Peru
La Arena Mine (La Arena Sulphide expansion Project)

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 Location:
13 km SW from Huamachuco, Peru

  Regional Office:
Ave. La Floresta 497 Of. 101 Charcarilla del Estanque San Borja, Lima 41
Lima
Peru
15037
Phone  ...  Subscription required
Fax+51-1-618-9729
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Production Start...
La Arena Gold Mine is a production mine with sulphide expansion potential (La Arena II).


Owners

Source: p. 75
CompanyInterestOwnership
Pan American Silver Corp. 100 % Indirect
Ownership Tree
Pan American has 100% ownership of the La Arena mine, through its wholly-owned Peruvian subsidiary La Arena S.A.

Contractors

Subscription required - Subscription is required.


Deposit Type

  • Sandstone hosted
  • Porphyry
  • Epithermal


Summary:

Two types of mineralized deposits are recognized at the La Arena property – high-sulfidation epithermal gold deposits and porphyry-hosted copper-gold deposits. The epithermal gold deposits are hosted in sediments of the Lower Cretaceous Chimu Formation and the copper-gold deposit is hosed in Oligocene-age multi-stage intermediate intrusions.

Both deposits are characterized by alteration and mineralization occurrences as defined and described by Hedenquist (1987), Hedenquist and Lowenstern (1994), Arribas (1995) and Sillitoe (2010), among others. The epithermal gold deposit currently being mined is characterized by supergene oxidized high-sulfidation mineralization, which occurs in fractured sandstones and hydrothermal breccia zones. The porphyry deposit is dominated by primary copper sulfides with gold and lesser molybdenum.

High sulfidation epithermal gold deposits form in geothermal systems where hot acidic hydrothermal fluids emanate directly from an intrusive source and generally remain undiluted by ground water. As is the case at La Arena, these deposits often represent the upper parts of porphyry systems where the two types of mineralization often overlap. High-sulfidation deposits can display a wide variety of mineralization styles, including veins, hydrothermal breccias, stockwork, and disseminations or replacements.

In porphyry deposits, the sulfide ore minerals are dominantly structurally-controlled, with most mineralization occurr ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The current operation has been mining the oxide deposit at the La Arena Mine since 2011. The operation is a conventional drill, blast, shovel and truck open pit run-of-mine (ROM) operation. Mining is carried out on two 12-hour shifts, operating 7 days a week under an alliance style contract with Peruvian contractors. The oxide ore is hauled directly from the pit to the leach facility or to stockpiles.

The La Arena Mine Calaorco open pit is mined by conventional truck and shovel methods. The mining fleet consists of 90 tonne class rock trucks and 10 m3 hydraulic shovels. Blasthole drilling is performed by diesel powered rotary single pass track drills.

The bench height is 8 meters. Double benching is applied with a catch bench 11 meters wide in sandstone and 12 meters wide in porphyry. Inter-ramp wall angles are 43.5° in sandstone and 37.0° in porphyry.

Ramps are constructed 25 meters wide including berms and ditches. Leach ore is direct hauled to the leach facility or to ore stockpiles.

All waste material is hauled to the waste rock storage facility located south of the Calaorco pit. Non-Acid-Generating (NAG) waste is used to encapsulate the Potentially Acid Generating (PAG) waste.


Crushing and Grinding


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:

CommodityUnits2023202220212020201920182017
Gold koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required149196
Silver koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics20222021202020192017
Daily processing capacity  ......  Subscription required  ......  Subscription required36,000 t36,000 t
Ore tonnes mined  ......  Subscription required  ......  Subscription required12,792 kt
Waste  ......  Subscription required  ......  Subscription required20,521 kt
Tonnes processed  ......  Subscription required  ......  Subscription required10,079 kt11,190 kt12,868 kt
Stripping / waste ratio  ......  Subscription required  ......  Subscription required1.9
Total tonnes mined  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Reserves at June 30, 2022:
Mineral reserves are estimated using a price of $19 per ounce of silver and $1500 per ounce of gold.
Mineral resources are estimated using a price of $22 per ounce of silver, $1700 per ounce of gold.

CategoryTonnage CommodityGradeContained Metal
Proven 20.5 Mt Gold 0.38 g/t 251.4 koz
Probable 21.8 Mt Gold 0.27 g/t 191.8 koz
Proven & Probable 42.3 Mt Gold 0.33 g/t 443.2 koz
Measured 0.8 Mt Gold 0.16 g/t 4 koz
Indicated 2.1 Mt Gold 0.17 g/t 11.9 koz
Measured & Indicated 2.9 Mt Gold 0.17 g/t 15.9 koz
Inferred 6 Mt Gold 0.22 g/t 42.3 koz

Commodity Production Costs:

CommodityUnits202320222021202020192017
Cash costs (sold) Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Total cash costs Gold USD 602 / oz  
Total cash costs Gold USD 599 / oz†  
All-in sustaining costs (sold) Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All-in sustaining costs (AISC) Gold USD 837 / oz†  
^ Guidance / Forecast.
† Net of By-Product.
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Operating Costs:

Units2017
OP mining costs ($/t mined) USD 5.42  
Processing costs ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
Subscription required - Subscription is required.

Financials:

Units2023202220212020201920172016
Capital expenditures (planned) M USD  ......  Subscription required
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 32   35.6  
Sustaining costs M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 32   35.3  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 233.8   244.4  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 59.3   101.4  
Subscription required - Subscription is required


Water Supply
Source: Subscription required

- subscription is required.


Heavy Mobile Equipment as of January 1, 2018:
HME TypeModelSizeQuantityLeased or
Contractor
Dozer (crawler) ....................... Subscription required ....................... Subscription required Leased
Dozer (crawler) ....................... Subscription required ....................... Subscription required Leased
Dozer (rubber tire) ....................... Subscription required ....................... Subscription required Leased
Drill (blasthole) ....................... Subscription required ....................... Subscription required Leased
Grader ....................... Subscription required ....................... Subscription required Leased
Loader ....................... Subscription required ....................... Subscription required Leased
Shovel ....................... Subscription required ....................... Subscription required Leased
Truck (fuel / lube) 5000 gallons ....................... Subscription required Leased
Truck (haul) ....................... Subscription required 90 t ....................... Subscription required Leased
Truck (water) ....................... Subscription required ....................... Subscription required Leased
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jun 21, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 11, 2023
....................... Subscription required ....................... Subscription required Subscription required Jun 21, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 11, 2023
Subscription required - Subscription is required.

Staff:

EmployeesContractorsYear
Subscription required 2022
Subscription required 2021
Subscription required Subscription required 2015

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2023
Quarterly Report 2023
Annual Information Form 2022
Annual Report 2022
Corporate Presentation 2022
Sustainability Report 2022
................................... 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
Management Discussion & Analysis 2018
Press Release 2018
Technical Report 2018
Year-end Mineral Reserves 2018
Annual Information Form 2017
Financial Review 2017
Management Discussion & Analysis 2017
Press Release 2017
Annual Information Form 2016
Corporate Presentation 2016
Financial Review 2016
Management Discussion & Analysis 2016
Annual Information Form 2015
Financial Review 2015
Management Discussion & Analysis 2015
Press Release 2015
Technical Report 2015
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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