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Peru
Andaychagua Mine (Yauli Operation)

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 Location:
31 km E from San Mateo, Peru

  Address:
Av. Manuel Olguín 373, Santiago de Surco
Lima
Peru
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Zinc
  • Lead
  • Copper
  • Silver
Mining Method
  • Overhand Cut & Fill
  • Sub-level stoping
  • Cemented backfill
Production Start...
Mine Life6 years (as of Jan 1, 2021)


Owners

Source: p. 7, 8, 42
CompanyInterestOwnership
Glencore plc. 23.3 % Indirect
Volcan Compañía Minera S.A.A. is a subsidiary of Glencore AG, which is a subsidiary of Glencore Plc., a company domiciled in Switzerland, hereinafter the Parent, owner of 63% of common class A voting shares and an economic interest of 23.29%, excluding treasury shares.

Contractors

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Deposit Type

  • Vein / narrow vein
  • Epithermal
  • Skarn
  • Porphyry


Summary:

The Yauli unit region shows mineralization related to polymetallic epithermal systems, replacement bodies and polymetallic vein systems, as well as porphyry mineralization and skarns, thus indicating the great potential of the area.

Andaychagua Vein is one of the producers in the San Cristobal district, is one of the most important veins on the southeast side of the Chumpe intrusive. The vein lies on the northeast side of the Chumpe Anticline* About three and a half kilometers southeast of the San Cristobal Vein system* The Andaychagma Vein strikes N 30° E and dips 85° northwest* The vein can be traced on surface for about four kilometers, three of which are in Mitu volcanic rocks and one of which in Excelsior phyHites. The structure continues on surface across the axial zone to the southwest side of the Chumpe Anticline, but only as a fault structure without apparent mineralization. The Andaychagua Vein carries sphalerite, galena, and silver minerals.


Mining Methods

  • Overhand Cut & Fill
  • Sub-level stoping
  • Cemented backfill


Summary:

(Translated from Spanish by Google Translate)
Andaychagua is an underground mine, a part of Yauli unit.

There was an increase in the head grades of Zn in 20%, Pb in 21% and Cu in 23%, due to the planned contribution of the Salvadora mineralized body in production. However, there was a decrease in the Ag grade of 8% due to the lower contribution of the vein Puca Urco.

The Andaychagua mine is exploiting the Andaychagua vein using the Cut and Fill method. The mining cycle begins with drilling and blasting, extraction, and sustaining and ends with the retreating cemented filling could demand up to 3 months time for a mining panel up to 200 m.

Exploration with diamond drilling gave positive results, which allowed increase resources mainly in the body Prosperity Roof and improved the certainty in the Salvadora Norte and Andaychagua bodies.

The mining cycle begins with drilling and blasting, extraction, sustaining and ends with the retreating cemented filling could demand up to 3 months time for a mining panel up to 200 m. The current production of the mine amounts to 2,500 tons/day, of which 50% is contributed by the Overhand cut and fill method.


Crushing and Grinding

Andaychagua's processing plant include grinding circuit consist of primary ball mills #1, 2 (10.5 'x 14', 8 'x 10') and secondary grinding ball mill (7’ x 12’).


Processing

Source: Subscription required

Summary:

- subscription is required.


Production:

CommodityUnits202120202019201820172016
Zinc t  ......  Subscription required  ......  Subscription required  ......  Subscription required000
Lead t  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Copper t  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Operational Metrics:

Metrics202120202019201820172016
Ore tonnes mined  ......  Subscription required  ......  Subscription required962 kt854 kt1,047 kt
Tonnes processed  ......  Subscription required  ......  Subscription required962 kt854 kt963 kt1,109 kt
Daily ore mining rate  ......  Subscription required  ......  Subscription required
Daily mining capacity  ......  Subscription required  ......  Subscription required4,000 t
Subscription required - Subscription is required.

Reserves at December 31, 2021:

CategoryTonnage CommodityGrade
Proven & Probable 4.4 Mt Zinc 6.6 %
Proven & Probable 4.4 Mt Lead 1.1 %
Proven & Probable 4.4 Mt Copper 0.1 %
Proven & Probable 4.4 Mt Silver 2.5 oz/t
Measured & Indicated 8.2 Mt Zinc 6.6 %
Measured & Indicated 8.2 Mt Lead 1.2 %
Measured & Indicated 8.2 Mt Copper 0.1 %
Measured & Indicated 8.2 Mt Silver 3.2 oz/t
Inferred 4.7 Mt Zinc 4.4 %
Inferred 4.7 Mt Lead 0.8 %
Inferred 4.7 Mt Copper 0.1 %
Inferred 4.7 Mt Silver 3.4 oz/t



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jul 7, 2022
....................... Subscription required ....................... Subscription required Subscription required Jul 7, 2022
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Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Annual Report 2017
Annual Report 2016
Other 2016
Annual Report 2015
Annual Report 2014
Other 1970
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