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Suriname
Merian Mine

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 Location:
54 km SSW from Moengo, Suriname
  Regional Office:
Van ‘t Hogerhuysstraat 15, 4th floor
Paramaribo
Suriname
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Fax(+597)-402-893
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life12 years (as of Jan 1, 2020)
The Merian mine operation currently includes the Merian 2 open pit, the Merian 1 open pit, and the Maraba open pit. The Kupari open pit is currently in development.

Owners

Source: p. 42
CompanyInterestOwnership
Newmont Corp. 75 % Indirect
Newmont Suriname, LLC. (operator) 75 % Direct
The Merian gold mine (“Merian”) is owned 75% by Newmont Suriname, LLC (“Newmont Suriname”) (formerly known as Suriname Gold Company LLC and 100% indirectly owned by Newmont Corporation) and 25% by Staatsolie (a company wholly owned by the Republic of Suriname).

Contractors

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Deposit Type

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

Summary:

The Merian Operations lie within Lower Proterozoic-aged rocks of the Guiana Shield. The northeast portion of Suriname is dominated by rocks of the Marowijne Supergroup which comprise the Rosebel Formation and the underlying Armina Formation. Mineralization discovered to date is consistent with an orogenic gold deposit model.

The deposits are structurally-controlled by a northwest-trending, southeast-plunging antiform (the Merian antiform) that has been interpreted from mapping and geophysical data. Northweststriking, moderate- to steeply-dipping faults and shear zones occur along the axial trace and limbs of the Merian antiform. Gold mineralization occurs in association with quartz veins, stockworks and breccias along these northwest-trending structural zones. Minor disseminated mineralization can occur adjacent to the quartz vein zones. A set of low-angle veins also occurs throughout the Project area and is interpreted to occupy low-angle imbricate thrust fault zones. The veins may be cross-cut by later, mineralized, quartz breccia bodies. Northeast and east–west-trending faults, which are also interpreted to have pre- and post-mineral displacement, cross-cut the Merian antiform and may, in part, bound or localize mineralization along the northwest-striking structural fabric.

At both Merian II and Maraba, gold mineralization is associated with quartz veins and breccias. Higher gold values are associated with higher vein density at both deposits. At Meri ........

Mining Methods

  • Truck & Shovel / Loader

Summary:

The operation currently includes the Merian 2 open pit, the Merian 1 open pit, and the Maraba open pit. The Kupari open pit is currently in development.

Open pit mining is conducted at Merian using conventional techniques and an Owner-operated conventional truck and shovel fleet. Currently, two open pits, Merian II and Maraba are being mined. Three smaller pits, Maraba South, Kupari, and Merian I are planned.

Pit slope design sectors are defined for the saprolite, saprock (transition), and fresh rock; and separate bench configurations are specified for each sector. Design parameters are the same for the Merian II, Maraba and Merian I pits. Bench face slope angles vary from 56–80º. All benches are assumed at 10 m heights.

There are five mining phases planned for the Merian II deposit. A starter phase in the main pit is planned within the final phase of the main pit with a small section of the west wall being common between the starter and main pits for a section of the pit wall. A minimum mining width of 50 m was targeted between the two phases and narrows to about 40 m for certain sections of the pit. The proposed Merian II main pit measures 2,800 m along strike and is roughly 1,000 m wide with a maximum depth of 390 m from 590 to 200 m elevation.

There are three mining phases planned for the Maraba deposit. A starter phase in the main pit is entirely centered within the final phase of the main pit allowing for at least 50 m betwee ........

Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityUnits2023202220212020201920182017
Gold koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required534513
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
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Operational Metrics:

Metrics202220212020201920182017
Total tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required50,102 k tons46,551 k tons42,314 k tons
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required13,968 k tons16,683 k tons13,295 k tons
Waste  ......  Subscription required  ......  Subscription required  ......  Subscription required36,134 k tons29,868 k tons29,019 k tons
Tonnes processed  ......  Subscription required  ......  Subscription required  ......  Subscription required16,203 k tons15,635 k tons15,017 k tons
Annual processing capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required12 Mt12 Mt12 Mt
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Reserves at December 31, 2022:
Cut-off grade utilized in 2022 reserves not less than 0.31 gram per tonne.

CategoryTonnage CommodityGradeContained Metal
Proven 41,333 kt Gold 1.16 g/t 1,533 koz
Probable 98,400 kt Gold 1.16 g/t 3,667 koz
Proven & Probable 139,733 kt Gold 1.16 g/t 5,200 koz
Measured 7,467 kt Gold 0.99 g/t 240 koz
Indicated 47,067 kt Gold 1.26 g/t 1,907 koz
Measured & Indicated 54,533 kt Gold 1.22 g/t 2,147 koz
Inferred 49,333 kt Gold 0.86 g/t 1,360 koz

Commodity Production Costs:

CommodityUnits2023202220212020201920182017
Credits (by-product) Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Cash costs (sold) Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 438 / oz   411 / oz  
Total cash costs (sold) Gold USD  ......  Subscription required ^†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 512 / oz†   467 / oz†  
All-in sustaining costs (sold) Gold USD  ......  Subscription required ^†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 627 / oz†   572 / oz†  
^ Guidance / Forecast.
† Net of By-Product.
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Financials:

Units2023202220212020201920182017
Capital expenditures (planned) M USD  ......  Subscription required
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 78   105  
Sustaining costs M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 54   37  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Pre-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 300   297  
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Water Supply
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Heavy Mobile Equipment:
HME TypeModelSizeQuantityRef. Date
Backhoe ....................... Subscription required ....................... Subscription required Dec 31, 2018
Backhoe ....................... Subscription required ....................... Subscription required Dec 31, 2018
Backhoe ....................... Subscription required ....................... Subscription required Dec 31, 2018
Dozer ....................... Subscription required ....................... Subscription required Dec 31, 2018
Dozer ....................... Subscription required ....................... Subscription required Dec 31, 2018
Drill ....................... Subscription required ....................... Subscription required Dec 31, 2018
Excavator ....................... Subscription required ....................... Subscription required Dec 31, 2018
Excavator ....................... Subscription required ....................... Subscription required Dec 31, 2018
Grader ....................... Subscription required ....................... Subscription required Dec 31, 2018
Grader ....................... Subscription required ....................... Subscription required Dec 31, 2018
Loader ....................... Subscription required ....................... Subscription required Dec 31, 2018
Loader (FEL) ....................... Subscription required ....................... Subscription required Dec 31, 2018
Loader (FEL) ....................... Subscription required ....................... Subscription required Dec 31, 2018
Truck (dump) ....................... Subscription required ....................... Subscription required Dec 31, 2018
Truck (dump) ....................... Subscription required ....................... Subscription required Dec 31, 2018
Truck (haul) ....................... Subscription required 150 t ....................... Subscription required Dec 31, 2022
Truck (water) ....................... Subscription required ....................... Subscription required Dec 31, 2018
Truck (water) ....................... Subscription required ....................... Subscription required Dec 31, 2018
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 12, 2023
....................... Subscription required ....................... Subscription required Subscription required May 12, 2023
....................... Subscription required ....................... Subscription required Subscription required May 12, 2023
....................... Subscription required ....................... Subscription required Subscription required May 12, 2023
....................... Subscription required ....................... Subscription required Subscription required May 12, 2023
....................... Subscription required ....................... Subscription required Subscription required May 12, 2023
....................... Subscription required ....................... Subscription required Subscription required May 12, 2023
....................... Subscription required ....................... Subscription required Subscription required May 12, 2023
....................... Subscription required ....................... Subscription required Subscription required May 12, 2023
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Staff:

Total WorkforceYear
Subscription required 2018
Subscription required 2017
Subscription required 2016

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2023
Corporate Presentation 2022
Form 10-K 2022
Other 2022
Sustainability Report 2022
Year-end Mineral Reserves 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Form 10-K 2018
Other 2018
Technical Report 2018
Year-end Mineral Reserves 2018
Annual Report 2017
Year-end Mineral Reserves 2017
Form 10-K 2016
Other 2016
Year-end Mineral Reserves 2016
Other 2013
Other 2011
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