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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
Junín
Peru
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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, the company started construction of stage I of the project (117 200 to 140 640 TPD), which was completed in the fourth quarter of 2020.The company is currently managing the permits to start Stage II of the project (140 640 to 170 000 TPD), which was approved by SENACE in June 2021. As of September 2021, the project has reached 63.7% financial progress.


Owners

Source: p. 41
CompanyInterestOwnership
Minera Chinalco Peru S.A. (operator) 100 % Direct
Chinalco Mining Corporation International 100 % Indirect
Chinalco Mining Corporation International (CMC) 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

  • Porphyry


Summary:

The Toromocho deposit is located in the core of the Morococha mining district.

The Toromocho copper-polymetallic deposit is a complex, mineralized assemblage of veins, veinlets, stock works, “manto-type” bodies, and disseminated sulfides of the general “porphyry copper” type mineralization hosted in both intrusive and contact metamorphic units with well-zoned mineralization and alteration characteristics in the Morococha mining district. The skarn-type copper-polymetallic mineralized bodies are controlled mostly by the contacts between the Tertiary-age intrusives including diorites, granodiorites, quartz, monzonites, and quartz porphyries and Jurassic-age calcareous host units of the Pucara Formation. Broad areas of the deposit are brecciated with various levels of intensity. The breccia texture crosses all rock types in the central portion of the deposit.

The mineralization of the Toromocho deposit is well zoned. The metal zonation crosses rock type boundaries although the skarn units are better hosts than the intrusive. The deposit shows well developed concentric silicate alteration along with the metal zoning. There is a central potassic zone with secondary biotite, quartz, and pyrite that is surrounded by a phyllic zone with quartz and sericite.

The outer zone is propylitic with epidote, chorite, calcite, and sphene. The wall rocks of the Toromocho deposit include several intrusive phases of the regional plutons, and at least two phases o ........


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:

CommodityUnits2021202020192018201720162015
Copper t  ......  Subscription required  ......  Subscription required  ......  Subscription required208,298194,704168,376182,288
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:

Metrics20212020
Daily milling capacity  ......  Subscription required  ......  Subscription required
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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Pipelines
TypeMaterialDiameterLengthDescription


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 Oct 18, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 18, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 18, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 18, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 18, 2022
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Staff:

EmployeesYear
Subscription required 2021

Corporate Filings & Presentations:

DocumentYear
................................... 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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