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Mexico
Noche Buena Mine

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 Location:
57 km NW from Caborca, Sonora, Mexico

  Regional Office:
Callejón Sin Nombre No. 209 Oeste, Col. Centro
Caborca
Sonora, Mexico
83600
Phone  ...  Subscription required
Fax+52-637-373-2204
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 TypeOpen Pit
Commodities
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Processing
  • Filter press plant
  • ROM/dump leach
  • Merrill–Crowe
  • Cyanide (reagent)
Mine Life3.1 years (as of Jan 1, 2020)


Owners

Source: p. 5
CompanyInterestOwnership
Fresnillo plc. 100 % Indirect
Minera Penmont, S. de R.L. de C.V (operator) 100 % Direct
Noche Buena is operated by Minera Penmont S. de R.L. de C.V (Minera Penmont) as a subsidiary of Fresnillo Plc (Fresnillo). Fresnillo is the 100 percent owner.

Deposit Type

  • Vein / narrow vein
  • Hydrothermal


Summary:

Noche Buena is located in the Herradura district, 23 kilometres from the Herradura mine.

Gold rich veins are restricted to the Proterozoic rocks which consist of biotite-feldspar-quartz and quartz-feldspar gneisses of sedimentary and plutonic origin. The hydrothermal system is structurally controlled and the higher grade mineralization occurs in quartz-sulfide veins filling tensional fractures. Quartz-sericite-albite alteration is widespread in the core of the deposit and grades to propylitic in the outer parts where the gneisses are more biotite rich.


Mining Methods

  • Truck & Shovel / Loader


Summary:

Noche Buena is an open pit gold mine which developed by conventional truck and shovel method with preliminary drilling and blasting operations. DM 45 Drilling machines are utilized for drilling blast holes, Cat 992 wheel loaders and Cat 390 Excavators for loading ore and waste to Cat 777 and Cat 775 haulage trucks.


Crushing and Grinding


Processing

  • Filter press plant
  • ROM/dump leach
  • Merrill–Crowe
  • Cyanide (reagent)

Flow Sheet: Subscription required

Summary:

Processing facilities consist of a heap leach pad, process ponds, a Merrill-Crowe plant, and various support facilities. Run-of-mine ore is placed on the heap leach pad for leaching via drip emitters after adding lime to each truckload. There are four ponds: pregnant pond, intermediate pond, and two contingency ponds.

Noche Buena receives solid cyanide via isotankers with flobins stored in a warehouse as a backup supply. There is an offload facility for the isotankers as well as an adjacent flobin mixing facility. Five tanks are used for receiving, mixing, and distributing the reagent-grade cyanide: dissolution (for isotankers), dilution, preparation (for flobins), storage, and dosification.

The Merrill-Crowe plant consists of a clarification cone, clarifiers, deoxygenation towers, a zinc cone, filter presses, and a sedimentation pond (for clarifier wash water). A refinery is also located onsite.

Recoveries & Grades:

CommodityParameter2020201920182017201620152014
Gold Head Grade, g/t  ......  Subscription required  ......  Subscription required0.520.520.510.50.51
Silver Head Grade, g/t  ......  Subscription required  ......  Subscription required0.10.10.10.20.4

Production:

CommodityUnits2020201920182017201620152014
Gold oz  ......  Subscription required  ......  Subscription required167,208172,282182,280158,179129,242
Silver oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Operational Metrics:

Metrics202020192018201720162015
Total tonnes mined  ......  Subscription required48,621 kt80,305 kt85,233 kt81,423 kt82,373 kt
Ore tonnes mined  ......  Subscription required12,167 kt18,196 kt17,821 kt17,432 kt17,400 kt
Tonnes processed  ......  Subscription required12,166,900 t18,195,744 t17,820,817 t17,431,718 t17,399,931 t
Subscription required - Subscription is required.

Reserves at December 31, 2020:
Mineral reserve cut-off grade is 0.25 g/t Au.
Mineral resource cut-off grade is 0.25 g/t Au.

CategoryTonnage CommodityGradeContained Metal
Probable 20,054 kt Gold 0.51 g/t 326 koz
Measured 20,454 kt Gold 0.51 g/t 335 koz
Indicated 13,007 kt Gold 0.49 g/t 207 koz
Measured & Indicated 33,461 kt Gold 0.5 g/t 541 koz
Inferred 1,957 kt Gold 0.47 g/t 29 koz

Commodity Production Costs:

CommodityUnits202020192018201720162015
Cash costs Gold USD  ......  Subscription required†  ......  Subscription required† 735.4 / oz† 793.5 / oz† 765.9 / oz† 973 / oz†
All-in sustaining costs (AISC) Gold USD  ......  Subscription required†  ......  Subscription required† 1,030 / oz† 870.05 / oz† 823.04 / oz† 1,015 / oz†
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units2020201920182017201620152014
Total operating costs ($/t milled) USD 10.89.86.87.57.57.910

Financials:

Units2021202020192018201720162015
Capital expenditures (planned) M USD  ......  Subscription required
Capital expenditures M USD  ......  Subscription required  ......  Subscription required50.2   18.7   8.6   2.6  
Revenue M USD  ......  Subscription required  ......  Subscription required211.4   215.5   225.8   181.7  
Gross profit M USD  ......  Subscription required  ......  Subscription required85.9   75.5   83.9   26.7  
Subscription required - Subscription is required


Heavy Mobile Equipment as of May 6, 2021:
HME TypeModelLeased or
Contractor
Drill ....................... Subscription required Leased
Excavator ....................... Subscription required Leased
Loader ....................... Subscription required Leased
Truck (haul) ....................... Subscription required Leased
Truck (haul) ....................... Subscription required Leased
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 12, 2021
....................... Subscription required ....................... Subscription required Subscription required May 12, 2021
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2020
Subscription required Subscription required Subscription required 2019
Subscription required Subscription required Subscription required 2018
Subscription required Subscription required Subscription required 2017
Subscription required Subscription required Subscription required 2016
Subscription required Subscription required Subscription required 2015

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2020
................................... 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
Year-end Mineral Reserves 2014
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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