Peru

Inmaculada Mine

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Categories

Overview

Mine TypeUnderground
Commodities
  • Silver
  • Gold
Mining Method
  • Cut & Fill
  • Transverse open stoping
  • Longitudinal open stoping
  • Longhole stoping
  • Sub-level stoping
  • Cemented paste backfill
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Mine Life2042
ShapshotHochschild Mining PLC is pleased to announce that the Modified Environment Impact Assessment for its Inmaculada operation in southwest Peru has received regulatory approval from SENACE, Peru's National Service of Environmental Certification for Sustainable Investments.

Inmaculada's Modified Environmental Impact Assessment was approved for an additional 20 years.

Owners

SourceSource
CompanyInterestOwnership
Hochschild Mining Plc. 100 % Indirect
Compañía Minera Ares S.A.C. (operator) 100 % Direct
The Hochschild Mining Plc. holds 100% of Inmaculada gold/silver underground operation.

Deposit type

  • Epithermal
  • Vein / narrow vein

Summary:

The Inmaculada deposits can be clasified as low to high sulfidation epithermal silver-gold deposits. Deposit sub-types on the Property includes LS type which includes the Au-Ag quartz veins at Quellopata including the Angela Vein, IS type and HS type which includes mineralized breccias at Minascucho, Central and San Salvador and disseminated mineralization at Tararunqui.

Rock chip sampling has shown that consistently high gold vaues (from 1 to over 10 g/t Au) are present in the Angela Vein, in the vicinity of line 10,000N of the local grid.

The Angela Vein outcrops in the central portion of the Quellopata vein system. The vein strikes northeasterly (050º), dips to the southeast (45º to 90º) and outcrops on surface along a strike lenght of 700 m.

The vein varies in thickness from 0.5 m to us much us 16.0 m, and has been tested over a vertical extent of up to 3000 m.

Two generations of mineralization have been observed in the Angela Vein, an early lead-zinc event and a later gold-silver event. The early mineralization consists of white quartz veinlets with sphalerite, galena, pyrite and argentite (minor). These veinlets form a broad, low-grade envelope (0.2 to 1.0% Pb + Zn) which surrounds, and overlaps, the Angela Vein mineralization.

The second mineralizing event at the Angela Vein is the most important economically, and consists of a white chalcedony vein with associated breccia and stockworks. The chalcedony contains small amounts (generally <1%) of electrum, argentite, pyrargyrite, chalcopyrite, pyrite and marcasite.

The Angela Vein is composed of a gangue of white chalcedony, quartz, calcite (minor), smectite and illite. Metallic minerals, which rarely constitute more than 1% of the vein, occur as disseminations and colloform banding, and consist of pyrite, marcasite, argentite, pyrargyrite, chalcopyrite, sphalerite and electrum.

Reserves

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Mining Methods

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Comminution

Crushers and Mills

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Processing

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Production

CommodityUnits2023202220212020201920182017
Silver Equivalent koz 00000000000000000000000000000018,58117,721
Gold Equivalent koz 000000000000000000251239
Silver koz 00000000000000005,6905,506
Gold koz 000000000000174165
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.

Operational metrics

Metrics202220212020201920182017
Ore tonnes mined 0000000000000000000000000001,323,525 t1,295,701 t
Tonnes processed 000000000000000000000000000
Daily processing capacity 00003,850 t3,850 t

Production Costs

CommodityUnits202320222021202020192018
Total cash costs (sold) Silver USD 00 00 00 5.7 / oz  
Total cash costs (sold) Gold USD 000 000 000 504 / oz   481 / oz  
Total cash costs (sold) Silver USD 0000000 0000000 0000000 -23.5 / oz  
Total cash costs (sold) Gold USD 0000000 000000 0000000 187 / oz  
All-in sustaining costs (sold) Silver Equivalent USD 000 000 000 000 9.9 / oz   9.9 / oz  
All-in sustaining costs (sold) Gold Equivalent USD 0000 0000 000 000 798 / oz   731 / oz  
^ Guidance / Forecast.
Net of By-Product.

Operating Costs

Currency2022202120202019201820172016
Total operating costs ($/t milled) USD 118.7  99.2  95.1  93.3  84.7  85.4  64.4  

Financials

Units2023202220212020201920182017
Capital expenditures (planned) M USD  ....  Subscribe
Capital expenditures M USD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 57.7   52.9  
Revenue M USD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 306.1   296.6  
Gross profit M USD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 116.7   74.9  
Pre-tax Income M USD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 116.4   73.7  
After-tax Income M USD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 116.4   73.7  

Heavy Mobile Equipment

Fleet data has not been reported.

Personnel

Mine Management

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