Mining Intelligence and News
Peru

Inmaculada Mine

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Categories

Overview

Mine TypeUnderground
StatusActive
Commodities
  • Silver
  • Gold
Mining Method
  • Cut & Fill
  • Transverse open stoping
  • Longitudinal open stoping
  • Longhole stoping
  • Sub-level stoping
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Mine Life... Lock
SnapshotHochschild 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

CommodityUnits202320222021202020192018201720162015
Silver Equivalent koz  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe21,07018,58117,72116,9488,318
Gold Equivalent koz  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe260251239229
Silver koz  ....  Subscribe  ....  Subscribe  ....  Subscribe5,7475,6905,5064,9082,055
Gold koz  ....  Subscribe  ....  Subscribe  ....  Subscribe18917416516385
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.

Operational metrics

Metrics20222021202020192018201720162015
Ore tonnes mined  ....  Subscribe  ....  Subscribe  ....  Subscribe1,338,569 t1,323,525 t1,295,701 t1,306,606 t659,737 t
Tonnes processed  ....  Subscribe  ....  Subscribe  ....  Subscribe1,338,569 t
Daily processing capacity  ....  Subscribe  ....  Subscribe  ....  Subscribe3,850 t3,850 t3,850 t3,850 t

Production Costs

CommodityUnits2023202220212020201920182017
Total cash costs (sold) Silver USD  ....  Subscribe  ....  Subscribe  ....  Subscribe 5.7 / oz  
Total cash costs (sold) Gold USD  ....  Subscribe  ....  Subscribe  ....  Subscribe 504 / oz   481 / oz   486 / oz  
Total cash costs (sold) Silver USD  ....  Subscribe  ....  Subscribe  ....  Subscribe -23.5 / oz **  
Total cash costs (sold) Gold USD  ....  Subscribe  ....  Subscribe  ....  Subscribe 187 / oz **  
All-in sustaining costs (sold) Silver Equivalent USD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 9.9 / oz   9.9 / oz   9.7 / oz  
All-in sustaining costs (sold) Gold Equivalent USD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 798 / oz   731 / oz   721 / 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 66.4   57.7   52.9  
Revenue M USD  ....  Subscribe  ....  Subscribe  ....  Subscribe 352.1   306.1   296.6  
Gross profit M USD  ....  Subscribe  ....  Subscribe  ....  Subscribe 144.7   116.7   74.9  
Pre-tax Income M USD  ....  Subscribe  ....  Subscribe  ....  Subscribe 144.2   116.4   73.7  
After-tax Income M USD  ....  Subscribe  ....  Subscribe  ....  Subscribe 144.2   116.4   73.7  

Heavy Mobile Equipment

Fleet data has not been reported.

Personnel

Mine Management

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