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Peru
Tambomayo Mine

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 Location:
12 km N from Tapay, 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
  • Lead
  • Zinc
Mining Method
  • Cut & Fill
  • Bench & Fill
Processing
  • Flotation
  • Agitated tank (VAT) leaching
  • Merrill–Crowe
  • Cyanide (reagent)
Tambomayo produced its first doré bar in December 2016.

Tambomayo started commercial operations in August 2017.


Owners

Source: p. 55
CompanyInterestOwnership
Compania de Minas Buenaventura S.A.A. 100 % Direct
Tambomayo mine is wholly-owned and operated by Compania de Minas Buenaventura S.A.A.

Deposit Type

  • Epithermal
  • Vein / narrow vein
  • Mesothermal


Summary:

Tambomayo is an epithermal/mesothermal polymetallic deposit in veins of gold and silver, with base metals in veins of quartz, emplaced in andesitic volcanic rocks from the Tertiary. Gold is found in native state and electrum, while silver is found in sulfides and sulfosalts accompanied by galena and sphalerite. It has two main systems of veins: Mirtha, running NW-SE, and Paola, running N-NE. There are also nearby exploration areas.


Mining Methods

  • Cut & Fill
  • Bench & Fill


Summary:

The underground works on the main Mirtha vein and diamond drilling carried out to date show an economic mineralization that deepens up to approximately 850 meters and it expands over 1,200 horizontal meters, increasing the size of the economic mineralization area to explore. The mineral is extracted via ramps and the 4840 cross-cut using 30-ton trucks. Mining at Tambomayo is conducted underground and utilizes the mechanized bench-and-fill and cut-and-fill methods. For the ventilation of works, there are two main 300,000 cfm fans and secondary fans for explorations and developments. For mine drainage, there is a water pumping station with a capacity of 60 l/s, which evacuates water to the 4740 level for treatment.


Crushing and Grinding


Processing

  • Flotation
  • Agitated tank (VAT) leaching
  • Merrill–Crowe
  • Cyanide (reagent)

Source: Subscription required

Summary:

The metallurgical process at Tambomayo consists of primary crushing, fine milling, and cyanidation in tanks to obtain rich solutions in gold and silver to be processed using the Merrill-Crowe plant. The precipitate is dried and smelted, obtaining doré bars (gold and silver). The cyanidation tailings enter the flotation process, from where lead-silver and zinc-silver concentrates are obtained.

Treatment Capacity: 2,000 MTD.

Recoveries & Grades:

CommodityParameter201920182017
Gold Recovery Rate, %  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold Head Grade, g/t 5.87.756.99
Silver Recovery Rate, %  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Head Grade, g/t 141.21252.25264.38
Lead Head Grade, % 1.351.491.72
Zinc Head Grade, % 1.992.162.35
Subscription required - Subscription is required.

Production:

CommodityProductUnits2020201920182017
Gold Metal in conc./ doré koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required64
Silver Metal in conc./ doré koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required
Lead Metal in concentrate t  ......  Subscription required  ......  Subscription required  ......  Subscription required
Zinc Metal in concentrate t  ......  Subscription required  ......  Subscription required  ......  Subscription required
^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics201920182017
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required
Daily milling capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Reserves at December 31, 2019:

CategoryTonnage CommodityGradeContained Metal
Proven 359,825 t Gold 4.89 g/t 56,514 oz
Proven 359,825 t Silver 104.46 g/t 1,208,403 oz
Proven 359,825 t Lead 1.48 % 5,318 t
Proven 359,825 t Zinc 2 % 7,186 t
Probable 2,085,782 t Gold 3.549 g/t 238,012 oz
Probable 2,085,782 t Silver 144.5 g/t 9,689,847 oz
Probable 2,085,782 t Lead 1.23 % 25,684 t
Probable 2,085,782 t Zinc 1.6 % 33,459 t
Proven & Probable 2,445,606 t Gold 3.73 g/t 294,526 oz
Proven & Probable 2,445,606 t Silver 138.72 g/t 10,898,250 oz
Proven & Probable 2,445,606 t Lead 1.27 % 31,002 t
Proven & Probable 2,445,606 t Zinc 1.66 % 40,645 t

Commodity Production Costs:

CommodityUnits201920182017
Cash costs (sold) Lead USD  ......  Subscription required  ......  Subscription required 1,635 / t
Cash costs (sold) Zinc USD  ......  Subscription required  ......  Subscription required 2,057 / t
Cash costs (sold) Silver USD  ......  Subscription required  ......  Subscription required 9.43 / oz
Cash costs (sold) Gold USD  ......  Subscription required  ......  Subscription required 671 / oz
Subscription required - Subscription is required.

Financials:

Units20192018201720162015
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 77.1  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gross profit M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Pre-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
After-tax Income M USD  ......  Subscription required  ......  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 is required.


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
Subscription required - Subscription is required.

Aerial view:

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