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United States
Marigold Mine

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 Location:
117 km W from Elko, Nevada, United States

  Address:
32255 Marigold Mine Rd, PO Box 160
Valmy
Nevada, United States
89438
Phone  ...  Subscription required
Fax1-775-635-2551
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
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life11 years (as of Jan 1, 2021)


Owners

Source: p. 16
CompanyInterestOwnership
SSR Mining Inc. 100 % Indirect
The Marigold mine is located in Humboldt County, Nevada, U.S. and is directly owned by Marigold Mining Company, a wholly-owned (100%) subsidiary of SSR Mining Inc.

Contractors

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Deposit Type

  • Carlin-type
  • Sediment-hosted


Summary:

Doebrich and Theodore (1996), Theodore (1998), and Theodore (2000) described the deposits at Marigold as distal disseminated silver–gold deposits. These deposits are disseminated equivalents of polymetallic vein deposits, characterised by a geochemical signature that includes silver, gold, lead, manganese, zinc, copper, antimony, arsenic, mercury, and tellurium (Cox and Singer, 1990). Typically, they contain substantially more silver relative to gold than other types of disseminated gold deposits and may feature supergene enrichment of silver if significantly oxidised.

Gold at Marigold is currently mined from multiple deposits located on a 10 km by 1.5 km area. From north to south, historical and future mineral deposits at Marigold include 32 North (32N), 5 Northeast (5NE), 5 North (5N), 8 North(8N), 8 Deep (8D), Terry Zone North (TZN), 8 South (8S), 8 South Extension (8Sx), Terry Zone (Old Marigold), Top Zone, HideOut, Terry Complex (Battle, Red Rock, East Hill), Red Dot, Mackay, Mud, Target, Valmy, Basalt-Antler, East Basalt, and Battle Cry. The majority of these individual mineralisation zones have coalesced into the Mackay pit.

The gold deposits at Marigold cumulatively define a north-trending alignment of gold mineralised rock more than 8 km long.

Gold mineralizing fluids were primarily controlled by fault structure and lithology, with tertiary influence by fold geometry. Within the Valmy Formation, higher gold grades are observed in th ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

Marigold uses standard open pit mining methods at a LOM sustained mining rate of approximately 250,000 tpd. The mine conducts conventional drilling and blasting activities with a free face trim row blast to ensure stable wall rock conditions. Electronic detonators are used to control the timing of the blasthole detonation.

Drilling and blasting occurs on 15.2 m benches. One grade control sample is taken from each blasthole with the sub-drilling excluded. Mining occurs on 15.2 m benches when prestripping waste or mining ore areas with the P&H electric shovel. 7.6 m benches are mined using the smaller hydraulic shovels to minimise the dilution that would otherwise occur from dozing a 15.2 m high face to these smaller shovels Blasting is done with an ammonium nitrate and fuel oil (ANFO) blend and a sensitised ANFO emulsion. The ore control mark-out procedure includes blast movement analysis for 90% of ore production blasts.

The Marigold geotechnical management plan (GMP) includes highwall monitoring using three radar systems which provide full coverage for the (largest) Mackay pit, or can be deployed in smaller pits, if required. Routine monitoring of waste dumps, leach pads and inactive pits using INSAR data is performed by a third party on a monthly basis.

Loading operations are currently performed using one electric shovel and three hydraulic shovels. Waste and ore haulage is performed with a fleet of 300 t primary haul trucks.

His ........


Crushing and Grinding


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:

CommodityUnits2022202120202019201820172016
Gold koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required205202205
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 required74,039 kt70,431 kt69,011 kt75,093 kt
Ore tonnes mined  ......  Subscription required  ......  Subscription required25,676 kt27,526 kt25,589 kt23,613 kt
Waste  ......  Subscription required  ......  Subscription required48,364 kt42,907 kt43,422 kt51,480 kt
Stripping / waste ratio  ......  Subscription required  ......  Subscription required1.9 1.6 1.7 2.2
Daily mining rate  ......  Subscription required  ......  Subscription required200,000 t200,000 t200,000 t210,000 t
Subscription required - Subscription is required.

Reserves at December 31, 2021:
The Mineral Reserve estimate is reported at a cut-off grade of 0.065 g/t Au.
The Mineral Resource estimate is based on an optimised pit shell at a cut-off grade of 0.065 g/t payable gold.

CategoryTonnage CommodityGradeContained Metal
Probable 203.8 Mt Gold 0.48 g/t 3,410 koz
Indicated 115.3 Mt Gold 0.43 g/t
Inferred 21.8 Mt Gold 0.36 g/t

Commodity Production Costs:

CommodityUnits2022202120202019201820172016
Cash costs (sold) Gold USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 723 / oz†   647 / oz†   647 / oz†  
All-in sustaining costs (sold) Gold USD  ......  Subscription required ^†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 974 / oz†   896 / oz†   960 / oz†  
^ Guidance / Forecast.
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units20192018201720162015
OP mining costs ($/t mined) USD 1.741.761.681.51.56
Processing costs ($/t milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Financials:

Units202120202019201820172016
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 52.9   20.4   30.5  
Sustaining costs M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 31   20.4   24.5  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 250.3   250.8   256.8  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 43.4   64.9   79.4  
Pre-tax Income M USD  ......  Subscription required  ......  Subscription required 26.2   64   73.7  
Subscription required - Subscription is required



Heavy Mobile Equipment as of December 30, 2021:
HME TypeModelSizeQuantity
Dozer (crawler) ....................... Subscription required ....................... Subscription required
Dozer (rubber tire) ....................... Subscription required ....................... Subscription required
Drill ....................... Subscription required ....................... Subscription required
Drill ....................... Subscription required ....................... Subscription required
Grader ....................... Subscription required ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required
Scraper ....................... Subscription required ....................... Subscription required
Shovel ....................... Subscription required ....................... Subscription required
Shovel (hydraulic) ....................... Subscription required
Shovel (hydraulic) ....................... Subscription required ....................... Subscription required
Truck (fuel / lube) ....................... Subscription required
Truck (haul) ....................... Subscription required 300 t ....................... Subscription required
Truck (haul) ....................... Subscription required 300 t ....................... Subscription required
Truck (haul) ....................... Subscription required ....................... Subscription required
Truck (water) ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameEmailProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Mar 1, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 1, 2022
....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Mar 1, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 28, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 1, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 1, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 1, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 1, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 1, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 1, 2022
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2020

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Corporate Presentation 2018
Financial Review 2018
Management Discussion & Analysis 2018
Annual Information Form 2017
Corporate Presentation 2017
Financial Review 2017
Management Discussion & Analysis 2017
Technical Report 2017
Annual Information Form 2016
Financial Review 2016
Other 2016
Year-end Mineral Reserves 2016
Annual Information Form 2015
Financial Review 2015
Technical Report 2014
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