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Peru
Toromocho Mine

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 Location:
55km SW from Tarma, Peru

  Address:
Mz. M2, lotes 1 y 2, Carretera Central km 150.5
Nueva Morococha
Peru
Phone  ...  Subscription required
Fax708-8001
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
  • Copper
  • Molybdenum
  • Silver
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life25 years (as of Jan 1, 2021)
On June 1, 2018, Minera Chinalco Peru S.A. began construction of Stage I of the project (117,200 to 140,640 tons per day), which was completed in the fourth quarter of 2020.

On July 27, 2022, Minera Chinalco Peru S.A. submitted an application for the modification of the "Toromocho Project" beneficiation concession to increase the installed capacity to 170,000 tons per day, taking into consideration the start of operations in the year 2024.

Toromocho Expansion project is in the construction stage.


Owners

Source: p. 48
CompanyInterestOwnership
Minera Chinalco Peru S.A. (operator) 100 % Direct
Chinalco Mining Corporation International 100 % Indirect
Chinalco Mining Corporation International is focusing on developing the Toromocho Project through Minera Chinalco Peru S.A. (“Chinalco Peru” or “MCP”), a wholly-owned subsidiary of the Company in Peru.

CMC was delisted from the Hong Kong Stock Exchange on 15 March 2017.

Since 2017, CMC is a wholly-owned subsidiary of Aluminum Corporation of China Overseas Holdings Limited (“COH”), which is a wholly-owned subsidiary of Chinalco.

Operator - Minera Chinalco Peru S.A.

Contractors

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Deposit Type

  • Breccia pipe / Stockwork
  • Porphyry
  • Skarn


Summary:

The Toromocho ore body lies within the central copper zone of the well-zoned Cu/Pb-Zn/Pb-Ag polymetallic Morococha district. The ore body forms the center of a skarn and breccia associated with 7 million year old mineralisation, alteration, and granodiorite and porphyry intrusions.

Geology of the Toromocho Deposit is complex and with a high degree of variability. Copper is in primary sulphide and skarn material. Skarn represents 50% of the material that contain copper mineralisation. High percentage of fluorine and MgO has been noted with skarn ores as alterations in form of talc, phlogopite and chlorites that are considered as problematic at the time of floatation in both reducing copper recovery and causing high concentration of MgO and fluorine in the concentrate that attracts undesirable heavy penalties.

The Toromocho ore body outcrops on the surface. The copper ore body extends downwards to a flat “bottom” 500 to 600 m below the surface. The highest grade part of the ore body lies within a 1.0 km × 2.0 km body of brecciated skarn, surrounding a cupola-like 7 million year old feldspar porphyry and granodiorite intrusive, and underlies on the west side, the older regional andesitic/dioritic intrusive exposed on the surface.

The primary ore body is over-printed by late-stage, pyritic primary mineralisation, clay and serpentine alteration, and supergene chalcocite and covellite enrichment. Spotty and structurally controlled, moderateto weak, ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Toromocho Mine is a conventional large scale open pit mine. The ore and waste rock is drilled and blasted prior to excavation by electric rope shovel excavators. The ore is loaded into ultra-class diesel powered off-highway rigid dump trucks (Cat’ 797) and hauled to either stockpile, or dumped directly into the primary crusher. The waste rock is hauled to the western waste dump. The mining fleet is owned and operated by Toromocho Mine.

Blast hole drilling operations at Toromocho are conducted using three large electric Pit Viper 351 blast hole drilling rigs. The drills are capable of drilling up to a ± 20 m depth as a single-pass at 350 mm diameter with some 56.7 t of bit loading. All blast holes are loaded with bulk emulsion explosives that are mixed on site by the local explosives contract provider. The blasting contractor supplies all explosives and blasting accessories for each blast. Blasting patterns in the Skarn and Hornfels is on a 6.9 x 8.0 m staggered pattern. The Potassic material is much harder than either the Skarn or Hornfels and achieves optimum fragmentation at a 5 × 6 m staggered pattern.

The main loading fleet at the Toromocho Mine are the three 35 cu.mt rope shovels (Cat’ 4795) supported by a large Le Tourneau 2350 Front End Loader (FEL). The large FEL provides some degree of blending capability and a fall-back loading capacity.


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityUnits2022202120202019201820172016
Copper t  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required208,298194,704168,376
Molybdenum t  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in concentrate.
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Operational Metrics:

Metrics202220212020
Daily milling capacity  ......  Subscription required  ......  Subscription required140,640 t
Total tonnes mined  ......  Subscription required  ......  Subscription required
Tonnes milled  ......  Subscription required  ......  Subscription required
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Reserves at December 31, 2021:

CategoryTonnage CommodityGrade
Proven & Probable 1,412 Mt Copper 0.463 %
Proven & Probable 1,412 Mt Molybdenum 0.015 %
Proven & Probable 1,412 Mt Silver 5.78 g/t

Operating Costs:

Units2015
OP mining costs ($/t mined) USD 1.12  
Processing costs ($/t milled) USD  ......  Subscription required
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Water Supply
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Heavy Mobile Equipment as of January 1, 2017:
HME TypeModelQuantity
Backhoe ....................... Subscription required ....................... Subscription required
Dozer ....................... Subscription required ....................... Subscription required
Dozer (rubber tire) ....................... Subscription required ....................... Subscription required
Drill ....................... Subscription required ....................... Subscription required
Drill ....................... Subscription required ....................... Subscription required
Drill ....................... Subscription required ....................... Subscription required
Excavator ....................... Subscription required ....................... Subscription required
Excavator ....................... Subscription required ....................... Subscription required
Grader ....................... Subscription required ....................... Subscription required
Grader ....................... Subscription required ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required
Loader (FEL) ....................... Subscription required ....................... Subscription required
Shovel (rope) ....................... Subscription required ....................... Subscription required
Truck (dump) ....................... Subscription required ....................... Subscription required
Truck (haul) ....................... Subscription required ....................... Subscription required
Truck (haul) ....................... Subscription required ....................... Subscription required
Truck (haul) ....................... Subscription required ....................... Subscription required
Truck (water) ....................... Subscription required ....................... Subscription required
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jul 18, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 18, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 18, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 18, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 18, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 18, 2023
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Staff:

EmployeesYear
Subscription required 2021

Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
Annual Result 2022
Other 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
Annual Result 2018
Press Release 2018
Technical Report 2017
Annual Result 2016
Management Discussion & Analysis 2016
Annual Report 2015
Technical Report 2012
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