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Mexico
Mercedes Mine

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 Location:
20 km E from Cucurpe, Sonora, Mexico
  Address:
Boulevard José María Morelos No. 307 , Edificio G, Local 101, Colonia Zona Militar Cuartel XV
Hermosillo
Sonora, Mexico
83145
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Fax01(632)-108-0000
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News
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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
  • Silver
Mining Method
  • Longitudinal open stoping
  • Mechanized Cut & Fill
  • Overhand Cut & Fill
  • Split-shooting
  • Paste backfill
Production Start...
Mine Life4 years (as of Jan 1, 2021)
Latest NewsBear Creek Mining Provides Update On US$25 Million Equinox Gold Payment     March 10, 2023

Owners

Source: p. 1
CompanyInterestOwnership
Bear Creek Mining Corp. 100 % Indirect
On April 21, 2022, Bear Creek Mining Corp. acquired a 100% interest in the Mercedes gold and silver mine in the state of Sonora, Mexico.

Contractors

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Deposit Type

  • Vein / narrow vein
  • Breccia pipe / Stockwork
  • Epithermal

Summary:

Gold-silver mineralization on the Mercedes property is hosted within epithermal, low-sulphidation (adularia-sericite) veins, stockwork, and breccia zones. These deposits form on predominately felsic subaerial volcanic complexes in extensional and strike-slip structural regimes. Near-surface hydrothermal systems, including surface hot springs and deeper hydrothermal fluid-flow zones, are the sites of mineralization. Mineral deposition takes place as the fluids undergo cooling by fluid mixing, boiling and decompression.

The geology of the Mercedes area is dominated by two northwest trending arches, cut by numerous northwest trending high-angle structures, which have exposed older marine sediments and overlying interbedded volcaniclastic sediments and lithic to quartz crystal lithic tuff units.

Over 16.5 km of veins have been identified within or marginal to the andesite-filled basins, which constitute a primary exploration target on the property. Major veins typically trend N30º-70ºW at 60º to 90º dips following the major regional structural pattern. Veins typically dip at greater than 60º, but locally range as low as 25º.A total of 16 low-sulphidation, epithermal vein/stockwork/breccia zones, have been identified on the Mercedes property and have been divided into three sub-district areas.

Mercedes Area (Mercedes-Barrancas)
The Mercedes vein system is the most prominent and continuous mineralized zone identified on the property, consisting ........

Mining Methods

  • Longitudinal open stoping
  • Mechanized Cut & Fill
  • Overhand Cut & Fill
  • Split-shooting
  • Paste backfill

Summary:

The Mine consists of seven separate underground mines:
1. Mercedes Mine area composed of Corona de Oro (no current reserves), Casa Blanca, Brecha Hill, Brecha Hill Norte, Aida, and Aida Norte;
2. Barrancas-Lagunas mine area composed of the Lagunas, Barrancas Centro, Barrancas Norte, Marianas, and Gap zone;
3. Lupita & Lupita Extension mine area;
4. Diluvio & Diluvio West mine areas;
5. Klondike mine area composed of the Rey de Oro and Rey de Oro Superior (Klondike deposit has no current reserves);
6. San Martin mine area.

While each of these deposits has ore remaining, Mercedes and Barrancas-Lagunas are nearing depletion with mostly remnant mining taking place. The bulk of the tonnage for the LOM is expected to be mined from Lupita, Diluvio, and Rey de Oro.

Each of the deposits are accessed through surface portals with some underground connections between deposits where possible.

Underground ramps connecting levels and nearby deposits are used as haulage routes for the 16 t haul trucks utilized at the Mine. These haul trucks are responsible for hauling from underground at each respective deposit and dumping at the ore stockpile located at the Mercedes section of the mine site.

The Mine currently plans the majority of mining to be completed using the mechanized cut & fill mining method. In Diluvio and Diluvio West the Mine utilizes a longitudinal longhole open stoping mining method where the ground condi ........

Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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^ Guidance / Forecast.

Production:
COVID-19 pandemic impacted production in early 2020 for approximately 3 months.

CommodityUnits2022202120202019201820172016
Gold koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required698393
Silver koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202120202019201820172016
Total tonnes mined  ......  Subscription required  ......  Subscription required851,588 t840,084 t
Ore tonnes mined  ......  Subscription required  ......  Subscription required691,267 t699,312 t
Tonnes milled  ......  Subscription required  ......  Subscription required667,723 t665,522 t683,545 t
Daily milling capacity  ......  Subscription required  ......  Subscription required2,200 t2,200 t
Annual production capacity  ......  Subscription required  ......  Subscription required155 koz of gold metal in doré
Annual production capacity  ......  Subscription required  ......  Subscription required594.83 koz of silver metal in doré
Daily mining rate  ......  Subscription required  ......  Subscription required2,388 t2,302 t
Daily ore mining rate  ......  Subscription required  ......  Subscription required1,894 t1,916 t
Subscription required - Subscription is required.

Reserves at December 31, 2021:
Mineral Reserves are estimated at a cut-off of 2.10 gpt Au, except Diluvio, which is estimated at 2.00 gpt Au.

The Mineral Resource cut-off grade of 2.00 gpt gold for Diluvio and 2.10 gpt gold for all other deposits.

CategoryTonnage CommodityGradeContained Metal
Proven 344 kt Gold 5.65 g/t 62.5 koz
Proven 344 kt Silver 40.7 g/t 449 koz
Probable 1,873 kt Gold 3.4 g/t 204.5 koz
Probable 1,873 kt Silver 26.9 g/t 1,620 koz
Proven & Probable 2,217 kt Gold 3.75 g/t 267 koz
Proven & Probable 2,217 kt Silver 29 g/t 2,069 koz
Measured 865 kt Gold 4.55 g/t 127 koz
Measured 865 kt Silver 33.73 g/t 938 koz
Indicated 2,914 kt Gold 4.79 g/t 449 koz
Indicated 2,914 kt Silver 44.93 g/t 4,209 koz
Measured & Indicated 3,779 kt Gold 4.73 g/t 575 koz
Measured & Indicated 3,779 kt Silver 42.37 g/t 5,147 koz
Inferred 884 kt Gold 4.5 g/t 128 koz
Inferred 884 kt Silver 41.02 g/t 1,167 koz

Commodity Production Costs:

CommodityUnits202120202019201820172016
Cash costs (sold) Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 908 / oz   706 / oz   690 / oz  
Cash costs (sold) Silver USD  ......  Subscription required  ......  Subscription required 10 / oz   9 / oz   10 / oz  
Cash costs (sold) Gold USD  ......  Subscription required†  ......  Subscription required† 885 / oz†   676 / oz†   656 / oz†  
All-in sustaining costs (AISC) Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
All-in sustaining costs (sold) Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 1,073 / oz   854 / oz   811 / oz  
All-in sustaining costs (sold) Silver USD  ......  Subscription required  ......  Subscription required 13 / oz   11 / oz   11 / oz  
All-in sustaining costs (sold) Gold USD  ......  Subscription required†  ......  Subscription required† 1,060 / oz†   832 / oz†   785 / oz†  
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units2021202020192018
UG mining costs ($/t milled) USD 39.943.560.759
Processing costs ($/t milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Financials:

Units20212020201920182017
Sustaining costs M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 7   9.2  
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 17.4   18.2  
Growth Capital M USD  ......  Subscription required  ......  Subscription required 10.4   9  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 86.1   112.1  
Operating Income M USD  ......  Subscription required  ......  Subscription required 4.1   34.3  
Subscription required - Subscription is required

Heavy Mobile Equipment as of December 31, 2021:
HME TypeModelSizeQuantity
ANFO Loader ....................... Subscription required ....................... Subscription required
Backhoe ....................... Subscription required 3.195 t ....................... Subscription required
Bolter ....................... Subscription required ....................... Subscription required
Bolter ....................... Subscription required ....................... Subscription required
Bulldozer ....................... Subscription required ....................... Subscription required
Drill ....................... Subscription required ....................... Subscription required
Drill ....................... Subscription required ....................... Subscription required
Drill ....................... Subscription required ....................... Subscription required
Drill (long hole) ....................... Subscription required 25.5 ....................... Subscription required
Jumbo ....................... Subscription required ....................... Subscription required
Jumbo ....................... Subscription required 14 inch ....................... Subscription required
Jumbo ....................... Subscription required 16 inch ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required
Loader (FEL) ....................... Subscription required ....................... Subscription required
Loader (FEL) ....................... Subscription required ....................... Subscription required
Loader (mini) ....................... Subscription required ....................... Subscription required
Load-Haul-Dump (LHD) ....................... Subscription required 3.5 cu. yd ....................... Subscription required
Load-Haul-Dump (LHD) ....................... Subscription required 8 cu. yd ....................... Subscription required
Scaler ....................... Subscription required ....................... Subscription required
Scissor Lift ....................... Subscription required ....................... Subscription required
Scoop Tram ....................... Subscription required 6 cu. yd ....................... Subscription required
Scoop Tram ....................... Subscription required 3.5 cu. yd ....................... Subscription required
Telescopic Handler ....................... Subscription required ....................... Subscription required
Telescopic Handler ....................... Subscription required ....................... Subscription required
Tractor trailer ....................... Subscription required ....................... Subscription required
Trans Mixer ....................... Subscription required 8 cu. m ....................... Subscription required
Truck (boom) ....................... Subscription required 25 t ....................... Subscription required
Truck (boom) ....................... Subscription required ....................... Subscription required
Truck (haul) ....................... Subscription required 16 t ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 13, 2022
....................... Subscription required ....................... Subscription required Subscription required Dec 31, 2021
....................... Subscription required ....................... Subscription required Subscription required Dec 31, 2021
....................... Subscription required ....................... Subscription required Subscription required Dec 31, 2021
....................... Subscription required ....................... Subscription required Subscription required May 13, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 21, 2022
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2021
Subscription required Subscription required Subscription required 2020
Subscription required Subscription required Subscription required 2019
Subscription required Subscription required Subscription required 2018

Corporate Filings & Presentations:

DocumentYear
Press Release 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Management Discussion & Analysis 2018
Press Release 2018
Technical Report 2018
Year-end Mineral Reserves 2018
Management Discussion & Analysis 2017
Year-end Mineral Reserves 2017
Year-end Mineral Reserves 2017
Press Release 2016
Press Release 2016
Technical Report 2016
Annual Report 2015
Technical Report 2014
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News:

NewsDate
Bear Creek Mining Provides Update On US$25 Million Equinox Gold Payment March 10, 2023
Drilling Results from Marianas and Rey De Oro Deposits at Bear Creek Mining's Mercedes Mine Demonstrate Near-Term Upside Potential February 22, 2023

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