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Peru
Orcopampa (Chipmo) Mine

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 Location:
0 km from Orcopampa, Peru

  Regional Office:
Las Begonias 415, 19th Floor, San Isidro
Lima
Peru
Phone  ...  Subscription required
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
  • Silver
Mining Method
  • Mechanized Cut & Fill
  • Bench & Fill
Processing
  • Gravity separation
  • Flotation
  • Concentrate leach
  • Carbon in pulp (CIP)
  • Merrill–Crowe
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)
Latest NewsBuenaventura Announces Resumption of Operations at the Orcopampa Mine     February 1, 2019


Owners

Source: p. 53
CompanyInterestOwnership
Compania de Minas Buenaventura S.A.A. 100 % Direct
The Orcopampa mine is wholly-owned and operated by Buenaventura.

Deposit Type

  • Epithermal


Summary:

Orcopampa is an epithermal/mesothermal gold and silver deposit, hosted in volcanic rocks from the Tertiary, consisting of flows and domes with a dacitic and andesitic makeup. Mineralization is found in tellurides, native gold, electrum, and sulfosalts, among others, in veins of quartz and anhydrite. Chipmo Mine is the current operating area with vein systems running NE-SW: Nazareno, Prometida, Pucará, etc. The Calera and Chipmo veins, from which more than 90% of Orcopampa´s production come from, were discovered by our geologists.


Mining Methods

  • Mechanized Cut & Fill
  • Bench & Fill


Summary:

Mining at Orcopampa is conducted underground using the mechanized bench-and-fill and cut-and-fill methods.

There are two areas currently under exploitation: Nazareno and Prometida, whose mineral production is extracted via shafts of the same name. The exploitation method used is mechanized overhand cut and fill, with low profile equipment. At the exploitation levels, ore is transported by locomotives and mining cars to the shafts, in order to then be extracted to the surface, from where the ore is transported to the concentrating plant, located 7 km away, using trucks with a 20 m3 capacity. Access to mining areas is mainly gained via three ramps. The barren material is recirculated as backfill to the pits, and the excess material is transported to the barren material deposit. For the ventilation of the works, there are three main fans with a capacity of 350,000 cfm each, and secondary fans for the explorations and developments. There are water pumping stations for drainage, with a total capacity of 420 l/s.


Crushing and Grinding


Processing

  • Gravity separation
  • Flotation
  • Concentrate leach
  • Carbon in pulp (CIP)
  • Merrill–Crowe
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)

Source: Subscription required

Summary:

The final products of the Orcopampa processing plant are doré bars and bulk concentrate. Operations include crushing, milling/sorting, gravimetry, cyanidation, thickening, CIP, flotation, cyanidation with gravimetric concentrates, desorption/electrowinning, Merrill-Crowe, smelting, carbon acid washing, carbon regeneration, cyanide destruction, and tailings disposal.

Current Treatment Capacity: 1,500 MTD.

Recoveries & Grades:

CommodityParameter20192018201720162015
Gold Recovery Rate, %  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold Head Grade, g/t 10.39.9811.912.714.3
Silver Recovery Rate, %  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Head Grade, g/t 5.93323859.769.9
Subscription required - Subscription is required.

Production:

CommodityUnits202020192018201720162015
Gold koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required191191205
Silver oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in conc./ doré. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics20192018201720162015
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required464,366 t458,222 t
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required464,366 t458,222 t
Daily milling capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Reserves at December 31, 2019:

CategoryTonnage CommodityGradeContained Metal
Proven 153,866 t Gold 12.38 g/t 61,261 oz
Proven 153,866 t Silver 18.64 g/t 92,224 oz
Probable 472,409 t Gold 9.219 g/t 140,015 oz
Probable 472,409 t Silver 13.98 g/t 212,387 oz
Proven & Probable 626,276 t Gold 9.99 g/t 201,276 oz
Proven & Probable 626,276 t Silver 15.13 g/t 304,611 oz

Commodity Production Costs:

CommodityUnits20192018201720162015
Cash costs (sold) Silver USD  ......  Subscription required  ......  Subscription required 10 / oz 9.62 / oz 8.82 / oz
Cash costs (sold) Gold USD  ......  Subscription required  ......  Subscription required 743 / oz 704 / oz 678 / oz
Subscription required - Subscription is required.

Financials:

Units20192018201720162015
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 8.2  
Revenue M USD  ......  Subscription required  ......  Subscription required 254.12  
Operating Income M USD  ......  Subscription required  ......  Subscription required 39.8  
Gross profit M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 58.5  
Pre-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 40  
After-tax Income M USD  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 17, 2020
....................... Subscription required ....................... Subscription required Subscription required Apr 17, 2020
....................... Subscription required ....................... Subscription required Subscription required Apr 17, 2020
....................... Subscription required ....................... Subscription required Subscription required Apr 17, 2020
....................... Subscription required ....................... Subscription required Subscription required Apr 17, 2020
....................... Subscription required ....................... Subscription required Subscription required Apr 17, 2020
....................... Subscription required ....................... Subscription required Subscription required Apr 17, 2020
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2018

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2018
................................... Subscription required 2018
................................... Subscription required 2018
................................... Subscription required 2018
Form 20-F 2017
Annual Report 2016
Form 20-F 2016
Press Release 2016
Subscription required - Subscription is required.

News:

NewsDate
Buenaventura Announces Resumption of Operations at the Orcopampa Mine February 1, 2019

Aerial view:

Subscription required - Subscription is required.

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