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United States
Hycroft Mine

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 Location:
80.3 km SW from Winnemucca, Nevada, United States

  Address:
54980 Jungo Road
P.O. Box 3030
Winnemucca
Nevada, United States
89445
Phone  ...  Subscription required
Fax775-201-1045
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life34 years (as of Jan 1, 2019)
Hycroft Mine is one of the largest precious metals deposits in the world, located in the Tier-One mining jurisdiction of Nevada, USA.

With a successful history of heap leach operations, Hycroft is transitioning to a milling operation, adding additional processes to existing infrastructure to build a larger operation that will produce gold and silver for many years to come.


Owners

Source: p. 21
CompanyInterestOwnership
Hycroft Resources and Development, Inc. (operator) 100 % Direct
Hycroft Mining Holding Corp. (HYMC) 100 % Indirect
The Hycroft mine is owned and managed by Hycroft Resources and Development, LLC, a wholly owned subsidiary of Hycroft Mining Holding Corporation.

Contractors

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Deposit Type

  • Epithermal
  • Vein / narrow vein


Summary:

The Hycroft deposit is a low-sulfidation, epithermal, hot springs system that contains Au and Ag mineralization. Radiometric dates of adularia (potassium feldspar) indicate that the main phase of Au and Ag mineralization formed four million years ago (Ebert, 1996) when hydrothermal fluids were fed upward along high angle, normal faults. Low-grade Au and Ag mineralization was co-deposited with silica and potassium feldspar throughout porous rock types. A subsequent drop in permeability, due to sealing of the system, led to over pressuring and subsequent repeated hydrothermal brecciation. Additional precious metal mineralization was deposited during this event as breccia zones, veins, and sulfide flooding. Au and Ag mineralization was followed 0.4 to 2.0 million years ago by an intense event of high sulfidation acid leaching of the mineralized volcanic rocks coincident with a regional water table drop. This allowed steam heated sulfur gases to condense into sulfuric acid and leach the upper portion of the mineralized rocks. Oxidation of sulfide mineralization occurs to variable depths over the deposit, depending upon proximity to faults, extent of acid leaching, and depth to water table. Sulfide content through the deposit is variable from 0% to 20%. Local Geology The deposit is typically broken into six major zones based on geology, mineralization, and alteration. These include Brimstone, Vortex, Central, Bay, Boneyard, and Camel Hill. The boundaries are typically major fau ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

OPEN PIT DESIGN
Open Pits were designed by generating Whittle pit shells based on net block values (net smelter returns) and pit slopes recommended by CNI (Call & Nicholas) and Golder Associates. Hycroft designed the final pit with haul ramps, appropriate catch benches, and mining widths. The Hycroft open pit is a large pit, covering an area nearly 3.25 miles long by 1.75 miles wide and reaching a maximum depth of approximately 2,700 feet.

Pit phasing has been designed internal to the final pit limit. Phasing was based on lower revenue whittle shells, access, and minimum mining widths. The purpose of the phasing is to improve over-all economics by mining higher economic margin phases first. In total, 22 individual phases have been designed.

Haul ramps are design to be 120 ft wide, including the safety berm for double lane traffic accommodating 320-t class trucks. A 10% maximum grade has been considered in the final design. Some internal pit phase designs considered single-lane travel and 12.5% maximum grade for a very limited number of benches near the bottom of the phase. All pits are designed to be mined on 40- t high benches with catch benches every bench. Catch bench widths varied from a maximum of 46.20 ft to a minimum of 22.85 ft.

OPEN PIT OPERATIONS
Hycroft mining operations are currently planned for typical truck and shovel open pit mining methods.

The following ore routing is available to each block:
- Oxi ........


Crushing and Grinding
Source: Subscription required

- subscription is required.


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:

CommodityUnits202120202019
Gold oz  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver oz  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in doré.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202120202019
Total tonnes mined  ......  Subscription required  ......  Subscription required4,407 k tons
Ore tonnes mined  ......  Subscription required  ......  Subscription required4,086 k tons
Waste  ......  Subscription required  ......  Subscription required321 k tons
Stripping / waste ratio  ......  Subscription required  ......  Subscription required0.08
Subscription required - Subscription is required.

Reserves at February 18, 2022:
Mineral Resources was calculated with approximatly Cutoff, AuEq: for Oxide - 0.003 oz/ton; for Sulphide - 0.011 oz/ton;

CategoryOreTypeTonnage CommodityGradeContained Metal
Measured Sulphide 372,226 k tons Gold 0.013 oz/ton 4,839 koz
Measured Oxide 97,086 k tons Gold 0.008 oz/ton 777 koz
Measured Total 469,312 k tons Gold 0.012 oz/ton 5,616 koz
Measured Sulphide 372,226 k tons Silver 0.65 oz/ton 240,830 koz
Measured Oxide 97,086 k tons Silver 0.3 oz/ton 29,417 koz
Measured Total 469,312 k tons Silver 0.58 oz/ton 270,247 koz
Indicated Sulphide 314,866 k tons Gold 0.012 oz/ton 3,778 koz
Indicated Oxide 36,046 k tons Gold 0.007 oz/ton 252 koz
Indicated Total 350,912 k tons Gold 0.011 oz/ton 4,030 koz
Indicated Sulphide 314,866 k tons Silver 0.53 oz/ton 165,305 koz
Indicated Oxide 36,046 k tons Silver 0.29 oz/ton 10,417 koz
Indicated Total 350,912 k tons Silver 0.5 oz/ton 175,722 koz
Measured & Indicated Sulphide 687,092 k tons Gold 0.013 oz/ton 8,617 koz
Measured & Indicated Oxide 133,132 k tons Gold 0.008 oz/ton 1,029 koz
Measured & Indicated Total 820,224 k tons Gold 0.012 oz/ton 9,646 koz
Measured & Indicated Sulphide 687,092 k tons Silver 0.59 oz/ton 406,135 koz
Measured & Indicated Oxide 133,132 k tons Silver 0.3 oz/ton 39,834 koz
Measured & Indicated Total 820,224 k tons Silver 0.54 oz/ton 445,969 koz
Inferred Sulphide 349,659 k tons Gold 0.012 oz/ton 4,196 koz
Inferred Oxide 101,314 k tons Gold 0.008 oz/ton 811 koz
Inferred Total 450,973 k tons Gold 0.011 oz/ton 5,007 koz
Inferred Sulphide 349,659 k tons Silver 0.4 oz/ton 141,262 koz
Inferred Oxide 101,314 k tons Silver 0.09 oz/ton 9,118 koz
Inferred Total 450,973 k tons Silver 0.33 oz/ton 150,380 koz

Financials:

Units202120202019
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Pre-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
After-tax Income M USD  ......  Subscription required
Subscription required - Subscription is required



Heavy Mobile Equipment as of July 31, 2019:
HME TypeModelSizeQuantityStatusLeased or
Contractor
Dozer ....................... Subscription required ....................... Subscription required Existing
Dozer ....................... Subscription required ....................... Subscription required Existing
Dozer ....................... Subscription required ....................... Subscription required Existing
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed
Dozer (rubber tire) ....................... Subscription required ....................... Subscription required Existing
....................... Subscription required ....................... Subscription required Proposed
Drill ....................... Subscription required ....................... Subscription required Existing
Drill (blasthole) ....................... Subscription required Existing Leased
....................... Subscription required ....................... Subscription required Proposed
Excavator ....................... Subscription required 29 cu. yd ....................... Subscription required Existing Leased
Excavator ....................... Subscription required 55 cu. yd ....................... Subscription required Existing Leased
Excavator ....................... Subscription required 32 cu. yd ....................... Subscription required Existing
Grader ....................... Subscription required ....................... Subscription required Existing
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed
Loader ....................... Subscription required ....................... Subscription required Existing
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed
Truck (dump) ....................... Subscription required 320 t ....................... Subscription required Existing Leased
Truck (dump) ....................... Subscription required 200 t ....................... Subscription required Existing
Truck (fuel / lube) ....................... Subscription required ....................... Subscription required Existing
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed
Truck (water) ....................... Subscription required ....................... Subscription required Existing
Truck (water) ....................... Subscription required 20000 gallons ....................... Subscription required Existing
Subscription required - Subscription is required.

Mine Management:

Job TitleNamePhoneProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 19, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 19, 2022
....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Sep 15, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 19, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 19, 2022
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2021
Subscription required 2020
Subscription required 2019
Subscription required 2018
Subscription required 2017
Subscription required 2016
Subscription required 2015

Corporate Filings & Presentations:

DocumentYear
Fact Sheet 2022
Technical Report 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Other 2018
Press Release 2016
Management Discussion & Analysis 2015
Feasibility Study Report 2014
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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