• Data Access
  • Your Email  
  • Your Email  
Keep me signed in.
Forgot your password?
Close
  • Forgot Your Password?
  • Enter the email you signed up with and we'll email it to you.
  • Your Email  
Close
Back
MDO
Mining Data Solutions
  • Home
  • Database
  • Subscribe
  • Sign In
  • Sign In
Peru
Pallancata Mine

This page is not tailored to
devices with screen width under 750 px.
 Location:
53 km N from Lampa, Peru

  Regional Office:
Calle La Colonia No. 180 Urb. El Vivero
Santiago de Surco
Lima
Peru
Phone+511-317-2000
Fax+511-317-5009
EmailEmail
WebsiteWeb
Additional Resources for Suppliers & Investors
Drill results over 30 g/t Au
Stay on top of recent discoveries.
Search drill results by commodity and grade.
Largest mines in the Americas
Mining and mill throughput capaciites.
Full profiles of select mines and projects.
Deepest underground mines
Shaft depth and mill throughput data.
Full profiles of select mines and projects.
Heavy mobile equipment
HME type, model, size and quantity.
Full profiles of select mines and projects.
Permitting and construction projects
Projects at the permitting or construction stage. Full profiles of select projects.
Mines with remote camps
Camp size, mine location and contacts.
Full profiles of select mines and projects.
Mines & projects in Peru
A list of country's mines and projects.
Full profiles of select mines and projects.
  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

Thank you for browsing through mine profiles compiled by the Mining Data Online team.

Would you like to subcribe or schedule a Demo?
  • Name:
     
  • Company:
     
  • Position:
     
  • Phone:
  • Email:
  • Message:

Overview

StageProduction
Mine TypeUnderground
Commodities
  • Silver
  • Gold
Mining Method
  • Mechanized Cut & Fill
  • Bench & Fill
  • Sub-level stoping
  • Cemented backfill
On-Site Camp yes
Production Start2007
Mine Life2 years (as of Jan 1, 2021)
In September, Hochschild Mining Plc., exercised its option to start Pallancata, the Company has been able to optimise the long-term mine plan utilising the existing resource base and has extended the life of the operation for a further two years. Hochschild Mining Plc. continues looking for additional near-mine and regional resource opportunities.


Owners

Source: p. 17, 70
CompanyInterestOwnership
Hochschild Mining Plc. 100 % Indirect
Compañía Minera Ares S.A.C. (operator) 100 % Direct
The Hochschild Mining Plc. holds 100% of Pallancata gold/silver property.

Contractors



Deposit Type

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

Source: Source

Summary:

Six principal areas of mineralization are identified on the Pallancata Property within an area of 3 km by 2 km. These comprise Virgen del Carmen/San Javier, Mariana, Mercedes, San Cayetano, Pallancata and Huararani.

Low sulfidation, epithermal silver-gold mineralization is present in a complex array of veins, breccias (both hydrothermal and tectonic), stockworks and silicified zones. Vein zones comprise vein breccia with in-situ clasts of bladed carbonate replacement and partial leaching. Crustiform and colloform banding is also common. The matrix generally consists of milky-white to coarse-grained semi translucent drusy quartz. Multiple phases of veining are apparent. Breccias range from simple tectonic breccias to complex multiple event hydrothermal breccias. These include black silica breccia (rich in sulfides) to massive white quartz breccias.

The main Pallancata Vein System is the principal target area and hosts a west-northwest to east-southeast trending zone of complex multiphase veining and faulting that generally has well-defined conduits that underwent major dilation. The system pinches, splits and has a sinuous nature. It is apparent that the vein system is en echelon in form, both horizontally and vertically.

The dip of the vein system is generally sub-vertical, with a down-throw to the south. The alteration style of the clay components changes from smectitic to illitic towards the main structure, but it is often hard to distinguish hydrothermal-related clay alteration from diagenetic alteration due to the high pumice content of the lapilli tuffs. There is a distinct silicified halo around the veins which is more prominent on the north side of the vein.

The main Pallancata Vein structure, as currently recognized has a strike length of approximately 2 km and is up to 40 m wide at its widest, including the intensely silicified wall rocks. Individual veins or splays are more typically 0.5 m to 3 m wide. Mineralization has been delineated to depths up to 500 m below surface. Portions of the system are dominated by in situ quartz altered, bladed carbonate. Elsewhere it shows jigsaw breccia, commonly with black chalcedonic silica and sulfide fill. Other parts are true hydrothermal breccias with complex textures and multiple phases of banded chalcedonic silica and euhedral drusy quartz.

Much of the high-grade mineralization on the Pallancata Property is seen in the West Vein. This zone is located in the western part of the main Pallancata structure, and comprises an intensely silicified body with a strong stockwork of quartz veins, typically striking northeastsouthwest to north-south. High-grade zones occur where these veins intersect the northwestsoutheast striking main Pallancata Vein System. In the West Vein, fracture movements are seen to be normal and sinistral, while in the Central Vein they are normal and dextral. The main structure displays mineralized cimoides (duplex veins) and tensional veins principally in the footwall of the West Vein, and in both footwall and hanging wall in the Central Vein.


Mining Methods

  • Mechanized Cut & Fill
  • Bench & Fill
  • Sub-level stoping
  • Cemented backfill

Source: p.40,73

Summary:

Hochschild is currently use several different mining methods for this area. There are Mechanized Cut & Fill, Bench & Fill and Sub-level stoping with cemented backfill.

Ore is then hauled by LHDs to ore-passes located at one of the internal access ramps. From these ramps, ore is loaded into road-type haul trucks for transportation to surface.

Extracted ore is stored on surface at the Pallancata mine site in one of a series of stockpiles to enable ore blending to take place.


Crushing and Grinding
Source: Subscription required

- subscription is required.


Processing

  • Vacuum filtration
  • Flotation
  • Dewatering
  • Filter press

Flow Sheet: Source
Source: Source

Summary:

All ore from the Pallancata Mine is toll treated at the Selene flotation plant, 22 km to the north by road.

In 2009, the Selene flotation plant capacity was expanded to a rated throughput of 3,000 t/d ore and no further expansion of the processing plant is planned.

The flowsheet for mineral processing for Pallancata ore involves:
x Three stage crushing
x Grinding
x Flotation
x Concentrate de-watering
x Tailings disposal.

In 2009, the Selene flotation plant capacity was expanded to a rated throughput of 3,000 t/d ore.
The plant modifications that were required to increase capacity to 3,000 t/d of ore are summarized below:

Flotation Circuit
- A third flotation circuit is installed including one conditioner tank and additional rougher, scavenger and cleaner flotation cells.

Concentrate Dewatering and Tailings Handling
- The capacity for concentrate dewatering is increased by the addition of a 20-ft diameter concentrate thickener and a new twenty plate, one-meter by one-meter pressure filter.
- A third, 50-ft diameter tailings thickener has been added.

There are three flotation circuits, each consisting of a conditioner tank, rougher and scavenger cells. The concentrate stream is combined and upgraded in two phases of column cell cleaning. The cleaned concentrate is partially dewatered in a thickener vessel and then filtered using a pressure filter and a vacuum disc filter. Selene concentrate has a moisture content of approximately 12%, whereas Pallancata concentrate having higher clay content is more difficult to filter and has a moisture content of 19% when using the pressure filter and approximately 28% from the disc filter. The pressure filter, installed during the last expansion project, was intended to handle all filtration duties. However, due to the poor filtration characteristics of Pallancata concentrate, the disc filter was retained.

The concentrate is loaded manually into bags weighing 50 kg and transferred to the port of Matarani for dispatch to a smelter.

Tailings are partially de-watered in two thickener vessels and the thickened slurry is classified to separate the coarser material for use as backfill in the mine. The fine particle size material is drained under gravity via pipeline to the tailings storage facility (TSF) located approximately one kilometer from the plant. Clarified water is pumped from the TSF to the plant.

The plant is relatively new and the equipment appears in good condition. Selene reported a plant feed of approximately 80 tph when treating Pallancata ore. This is lower than the nominal capacity due to the hardness of the ore and the difficulties experienced from the high moisture content during the wet season.

Recoveries & Grades:

CommodityParameter2021202020192018201720162015
Silver Head Grade, g/t 212247278362442381259
Gold Head Grade, g/t 0.840.871.011.31.781.861.28

Production:

CommodityUnits2022202120202019201820172016
Silver Equivalent koz 4,600-4,900 ^4,3824,7909,3619,4037,6933,536
Gold Equivalent koz 64-68 ^515611612710448
Silver koz 3,2613,6797,2597,4495,9562,620
Gold koz 131326262312
All production numbers are expressed as metal in concentrate. ^ Guidance / Forecast.

Operational Metrics:

Metrics202120202019201820172016
Ore tonnes mined 530,681 t519,611 t915,877 t717,652 t470,903 t244,765 t
Daily processing capacity 3,000 t3,000 t3,000 t3,000 t3,000 t

Reserves at December 31, 2021:

CategoryTonnage CommodityGradeContained Metal
Proven & Probable 917,468 t Silver 231 g/t 6.8 M oz
Proven & Probable 917,468 t Gold 1.1 g/t 31.1 koz
Proven & Probable 917,468 t Silver Equivalent 9.1 M oz
Measured & Indicated 2,119,000 t Silver 297 g/t 20.2 M oz
Measured & Indicated 2,119,000 t Gold 1.38 g/t 93.7 koz
Measured & Indicated 2,119,000 t Silver Equivalent 396 g/t 27 M oz
Inferred 1,845,000 t Silver 230 g/t 13.6 M oz
Inferred 1,845,000 t Gold 0.98 g/t 58.3 koz
Inferred 1,845,000 t Silver Equivalent 300 g/t 17.8 M oz

Commodity Production Costs:

CommodityUnits2022202120202019201820172016
Total cash costs (sold) Silver USD 19.2 / oz   13.1 / oz   9.6 / oz   8.1 / oz   7.8 / oz   12.4 / oz  
Total cash costs (sold) Gold USD 1,366 / oz   1,112 / oz   857 / oz  
Total cash costs (sold) Silver USD 17.6 / oz†   10.4 / oz†   7.5 / oz†  
Total cash costs (sold) Gold USD -182 / oz†   -1,658 / oz†   -1,210 / oz†  
All-in sustaining costs (sold) Silver Equivalent USD 18.8 / oz ^   22.8 / oz   15.6 / oz   13.5 / oz   12.1 / oz   10.7 / oz   16.3 / oz  
All-in sustaining costs (sold) Gold Equivalent USD 1,780 / oz ^   1,959 / oz   1,341 / oz   1,097 / oz   898 / oz   792 / oz   1,206 / oz  
^ Guidance / Forecast.
† Net of By-Product.

Operating Costs:

Units2021202020192018201720162015
Total operating costs ($/t milled) USD 124.8101.283.893.6101.513198.9

Financials:

Units202120202019201820172016
Capital expenditures M USD 14.2  7.5  26.6   27.1   18.9   16.1  
Revenue M USD 99.1  100.7  147.6   135.8   120.5   54.5  
Gross profit M USD 1  4.6  16.2   32   50.2   12  
Pre-tax Income M USD 0.3  4  15.2   31.2   48.9   11.3  
After-tax Income M USD 0.3  4  15.2   31.2   48.9   11.3  



Heavy Mobile Equipment:
HME TypeModelSizeQuantityStatusLeased or
Contractor
Ref. Date
Bolter 3 Proposed Dec 31, 2018
Drill (long hole) Atlas Copco Simba 2 Proposed Dec 31, 2018
Jumbo 3 Proposed Dec 31, 2018
Scoop Tram 6 cu. yd 7 Proposed Dec 31, 2018
Scoop Tram 1.5 cu. yd 4 Proposed Dec 31, 2018
Scoop Tram 4 cu. yd 3 Proposed Dec 31, 2018
Shotcreter 1 Proposed Dec 31, 2018
Truck (boom) 1 Proposed Dec 31, 2018
Truck (dump) 37 Existing Leased Dec 31, 2020
Truck (haul) 5 t 1 Proposed Dec 31, 2018

Mine Management:

Job TitleNameProfileRef. Date
Deputy Maintenance Manager Jose Antonio Q. LinkedIn May 11, 2022
Maintenance Superintendent Antonio Monzon Fernandez LinkedIn May 11, 2022
Mine Superintendent Jose Granda LinkedIn May 11, 2022
Operations Manager Luis Gutiérrez Barreda LinkedIn May 11, 2022
Process/Metallurgical Manager Luis Vargas Hurtado LinkedIn May 11, 2022

Staff:

Total WorkforceYear
1,060 2019

Corporate Filings & Presentations:

DocumentYear
Annual Report 2021
Annual Result 2021
Annual Review 2020
Other 2020
Annual Report 2019
Mine Operations Plan 2019
Annual Report 2018
Corporate Presentation 2018
Annual Report 2017
Corporate Presentation 2017
Annual Report 2016
Corporate Presentation 2016
Annual Report 2015
Corporate Presentation 2014
Technical Report 2009
Technical Report 2008
Technical Report 2007
Technical Report 2006

Terms of Use Privacy Policy © 2017-2023 MDO Data Online Inc.