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Peru
San Rafael Mine

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 Location:
142 km N from Juliaca, Peru

  Regional Office:
Jirón Giovanni Batista Lorenzo Bernini 149, Office 501 – A, San Borja
Lima
Peru
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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
  • Tin
Mining Method
  • Sub-level stoping
  • Blast Hole Stoping
  • Bench stoping
  • Cemented backfill
Production Start...
Mine Life8.1 years (as of Jan 1, 2021)
San Rafael is largest tin mine in the Western Hemisphere in terms of concentrate production.


Owners

Source: p. 11
CompanyInterestOwnership
Minsur S.A. (operator) 100 % Direct

Contractors

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Deposit Type

  • Hydrothermal
  • Vein / narrow vein


Summary:

Hydrothermal tin Iodes typically have very high ore grades (half of the deposits grade> 1.3 % Sn, and a tenth ofthem > 2.3 %), and most ofthem contain in excess of 1,000 t Sn, with sorne hosting > 50,000 t Sn (Menzie et al., 1988; Singer et al., 1993). Compared to most tin Iodes, the Peruvian San Rafael Sn-Cu deposit, the subject of this thesis, is a giant member of this deposit clan. Hosting a total resource of ~ 1,000,000 t Sn (metal) and having an average grade of 4.7 wt.% Sn (Minsur, unpub. data, December 2002), it is responsible for ~13% of the annual global hard-rock tin production (J. Carlin, USGS, writlen comm. 2000) and is considered the world's richest hydrothermal tin Iode.

In the San Rafael deposit, the high-grade mineralization is of the cassiteritesulfide type, and the bulk of it is hosted by a large, vertically extensive, single complex vein, referred to as the San Rafael Iode. This Iode is part of a vein-breccia system, which is centered on a Late Oligocene granitoid stock, shallowly emplaced in Lower Paleozoic c1astic metasedimentary rocks. The tin ores form cassiterite-quartz-chlorite-bearing veins and breccias, hosted by several large fault jogs at depth in the Iode. By contrast, the copper ores, which contain disseminated acicular cassiterite, are localized in the upper part of the system. Both ore types are associated with a very distinctive strong chloritic alteration, which was preceded by intense sericitization, tourrnalinization and tourmal ........


Mining Methods

  • Sub-level stoping
  • Blast Hole Stoping
  • Bench stoping
  • Cemented backfill


Summary:

Benches with sub-levels of 12 to 20 meters height are prepared to make up the drilling and blasting levels. Extraction levels are prepared by the development of galleries parallel to the mineralized structure for every 3 or 4 sublevels.


Crushing and Grinding
Source: Subscription required

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Processing

Flow Sheet: Subscription required

Summary:

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Production:

CommodityProductUnits202120202019201820172016
Tin Metal in concentrate t  ......  Subscription required  ......  Subscription required  ......  Subscription required18,60117,79118,789
Tin Concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required484640
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Operational Metrics:

Metrics202120202019201820172016
Ore tonnes mined  ......  Subscription required  ......  Subscription required1,111,464 t1,084,700 t1,049,707 t1,101,190 t
Tonnes milled  ......  Subscription required  ......  Subscription required1,159,299 t1,134,926 t1,700,443 t1,434,808 t
Daily milling capacity  ......  Subscription required  ......  Subscription required2,900 t
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Reserves at December 31, 2021:
Mineral resources are estimated using Cut-off 0.46% Sn.

Ore reserves are estimated using Cut-off 0.69% Sn.

CategoryOreTypeTonnage CommodityGradeContained Metal
Proven Stockpiles 51.1 kt Tin 0.72 % 400 t
Proven In-Situ (UG) 3,475 kt Tin 2.22 % 77,200 t
Probable Stockpiles 28.3 kt Tin 0.61 % 200 t
Probable In-Situ (UG) 2,788 kt Tin 1.95 % 54,200 t
Proven & Probable Stockpiles 79.3 kt Tin 0.68 % 500 t
Proven & Probable In-Situ (UG) 6,263 kt Tin 2.1 % 131,500 t
Proven & Probable Total 6,342 kt Tin 2.08 % 132,000 t
Measured 4,527 kt Tin 2.7 % 122,100 t
Indicated 3,526 kt Tin 2.08 % 73,200 t
Measured & Indicated 8,053 kt Tin 2.42 % 195,300 t
Inferred 3,132 kt Tin 2.35 % 73,600 t

Commodity Production Costs:

CommodityUnits2021202020192018
Cash costs Tin USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 8,662 / t  
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Operating Costs:

Units2021202020192018201720162015
Total operating costs ($/t milled) USD 12811265.5647081.6127

Financials:

Units2021202020192018
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 17.5  
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Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jul 15, 2022
....................... Subscription required ....................... Subscription required Subscription required Jul 15, 2022
....................... Subscription required ....................... Subscription required Subscription required Jul 15, 2022
....................... Subscription required ....................... Subscription required Subscription required Jul 15, 2022
....................... Subscription required ....................... Subscription required Subscription required Jul 15, 2022
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Staff:

EmployeesYear
Subscription required 2021
Subscription required 2019
Subscription required 2015

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Annual Report 2017
Annual Report 2016
Corporate Presentation 2016
Other 2016
Annual Report 2015
Annual Report 2014
Annual Report 2013
Other 2005
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