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United States
Mineral Ridge Mine (Mineral Ridge Expansion Project)

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 Location:
7 km NW from Silver Peak, Nevada, United States

  Address:
1910 Idaho St. Suite 102-550
Elko
Nevada, United States
89801
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StatusInactive / Suspended
Mine TypeOpen Pit
Commodities
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Production Start...
The Company suspended mining operations of its Mineral Ridge mine in November 2017 as the Company had mined all of its economical mineral reserves based on gold pricing and heap leach recovery parameters. Further in December 2021, the Company ceased operating the leach pad as it was not generating sufficient metals to make the operation economic.


Owners

Source: p. 1
CompanyInterestOwnership
Scorpio Gold Corp. 100 % Indirect
Mineral Ridge Gold, LLC (operator) 100 % Direct
Scorpio Gold now holds a 100% interest in the Mineral Ridge gold project located in Esmeralda County, Nevada as a result of Titan Mining Corporation’s (“Titan”) termination of an earn-in option agreement (the “Titan Agreement”) announced on August 31, 2020.

MRG now has a 100% Project interest, and is a wholly-owned subsidiary of Scorpio Gold.

Contractors

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Deposit Type

  • Vein / narrow vein
  • Orogenic


Summary:

Based on current published explanations for the Mineral Ridge mineralization, it appears that a structurally-controlled orogenic model may be the most applicable to the deposit.

The currently-known mineralized zones occur over an area of approximately 14,000 ft (4,300 m) north south and 15,000 ft (4,600 m) east–west.

The gold mineralization at Mineral Ridge is primarily associated with milky quartz veins and lenses accompanied by local argillization and some sericitization. Prior to mining, the individual zones were as much as 50 ft (15 m) thick, typicallyconsisting of a higher-grade quartz veins from five to 30 ft (9 m) thick, surrounded by a lower-grade envelope of mineralization. Two or more highgrade zones are commonly observed stacked in en echelon patterns.

Gold deposition is structurally-controlled, and some of the highest-grade mineralization is found in shoots that are at an oblique angle to the direction of movement of extension. Gold is present as native gold and electrum that occurs as irregular shaped intergrowths in quartz associated with interstitial space and small fractures. Gold also occurs as irregularly-shaped intergrowths and as fracture fillings associated with goethite, much of which was derived from original pyrite. In partially oxidized mineralization, gold occurs with both pyrite and goethite. Gold particle size varies from 1–2 µm to about 700 µm, but most of the particles are in the 5–50 µm size range. Gold to sil ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Company suspended mining operations of its Mineral Ridge mine in November 2017.
The mineral deposits at the Project were being mined by conventional open pit mining methods.


Crushing and Grinding


Processing

Source: Subscription required

Summary:

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Production:

CommodityUnits2021202020192018201720162015
Gold oz  ......  Subscription required  ......  Subscription required  ......  Subscription required7,76719,04536,87939,690
Silver oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Operational Metrics:

Metrics2017201620152014
Total tonnes mined 3,114,397 t5,104,882 t7,764,789 t6,485,523 t
Ore tonnes mined 394,868 t750,204 t984,850 t919,577 t
Waste 2,719,529 t4,354,678 t6,779,939 t5,565,946 t
Daily mining rate 15,156 t18,167 t23,901 t
Tonnes processed 398,898 t846,140 t891,997 t974,346 t
Stripping / waste ratio 5.4

Reserves at January 2, 2018:
Mineral Resources are reported inclusive of Mineral Reserves at a gold cut-off grade of 0.01 opt.
Mineral Reserves are reported within the pit designs at a 0.01 opt Au cut-off grade.

CategoryOreTypeTonnage CommodityGradeContained Metal
Proven & Probable Leach Pad 6,855 k tons Gold 0.017 oz/ton 117.2 koz
Proven & Probable In-Situ (OP) 3,713 k tons Gold 0.042 oz/ton 156.3 koz
Proven & Probable Leach Pad 6,855 k tons Silver 0.017 oz/ton 115.9 koz
Measured Leach Pad 2,895 k tons Gold 0.017 oz/ton 48.5 koz
Measured In-Situ (OP) 2,088 k tons Gold 0.074 oz/ton 155.2 koz
Measured Leach Pad 2,895 k tons Silver 0.016 oz/ton 46.4 koz
Indicated Leach Pad 4,220 k tons Gold 0.017 oz/ton 73.2 koz
Indicated In-Situ (OP) 1,095 k tons Gold 0.066 oz/ton 72.6 koz
Indicated Leach Pad 4,220 k tons Silver 0.018 oz/ton 74.1 koz
Measured & Indicated Leach Pad 7,117 k tons Gold 0.017 oz/ton 121.7 koz
Measured & Indicated In-Situ (OP) 3,183 k tons Gold 0.072 oz/ton 227.8 koz
Measured & Indicated Leach Pad 7,117 k tons Silver 0.017 oz/ton 120.4 koz
Inferred Leach Pad 76 k tons Gold 0.016 oz/ton 1.2 koz
Inferred In-Situ (OP) 182.9 k tons Gold 0.059 oz/ton 10.73 koz
Inferred Leach Pad 76 k tons Silver 0.027 oz/ton 2 koz

Commodity Production Costs:

CommodityUnits202120202019201820172016
Cash costs (sold) Gold USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 864 / oz†   1,013 / oz†   862 / oz†  
Total cash costs (sold) Gold USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 883 / oz†   1,026 / oz†   881 / oz†  
† Net of By-Product.
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Financials:

Units202120202019201820172016
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 9.8   27   42.8  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 2.4   -1.8   3.1  
Pre-tax Income M USD  ......  Subscription required  ......  Subscription required 2.4   -1.8   3  
After-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 2.3   -1.8   2.4  
Book Value M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 4.6   4.5   4.3  
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Heavy Mobile Equipment:

Mine Management:

Job TitleNamePhoneEmailProfileRef. Date
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Aug 8, 2022
....................... Subscription required ....................... Subscription required Subscription required Aug 8, 2022
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Staff:

EmployeesYear
Subscription required 2021
Subscription required 2020
Subscription required 2019
Subscription required 2018
Subscription required 2017
Subscription required 2016

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... 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 2019
................................... Subscription required 2019
................................... Subscription required 2019
Corporate Presentation 2018
Feasibility Study Report 2018
Financial Review 2018
Management Discussion & Analysis 2018
Corporate Presentation 2017
Corporate Presentation 2017
Financial Review 2017
Management Discussion & Analysis 2017
Other 2017
Financial Review 2016
Management Discussion & Analysis 2016
Management Discussion & Analysis 2015
Financial Review 2014
Management Discussion & Analysis 2014
Technical Report 2014
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