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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
EmailEmail
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StatusCare and Maintenance
Mine TypeOpen Pit
Commodities
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life2053
Hycroft Mine is one of the largest precious metals deposits in the world, located in the Tier-One mining jurisdiction of Nevada, USA.

The Hycroft Mine, has historically operated as an open-pit oxide mining and heap leach processing operation. Mining operations at the Hycroft Mine were discontinued in November 2021 as a result of the then current and expected ongoing cost pressures for many of the reagents and consumables used at the Hycroft Mine and to further determine the most effective processing method for the sulfide ore. The Company recovered the remaining gold and silver ounces from the drain down solutions as of December 31, 2022.

Today, the company is focused on completing the technical studies to transition Hycroft into a large-scale milling operation for processing the sulfide ore.

Pre-Feasibility Study ("PFS") targeted for completion in the first half of 2024.


Owners

Source: p. 31
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:

The Hycroft Mine, has historically operated as an open-pit oxide mining and heap leach processing operation. Mining operations at the Hycroft Mine were restarted in 2019 on a pre-commercial scale and discontinued in November 2021 as a result of the then current and expected ongoing cost pressures for many of the reagents and consumables used at the Hycroft Mine and to further determine the most effective processing method for the sulfide ore.

In March 2023, Hycroft, along with its third-party consultants, completed and filed the Hycroft Property Initial Assessment Technical Report Summary Humboldt and Pershing Counties, Nevada with an effective date of March 27, 2023 (the “2023 Hycroft TRS”). The 2023 Hycroft TRS provides an initial assessment of the mineral resource estimate utilizing a milling and pressure oxidation (“POX”) process for sulfide mineralization and heap leaching process for oxide and transition mineralization.

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 b ........


Crushing and Grinding
Source: Subscription required

- subscription is required.


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:
During the year ended December 31, 2022, the company completed the processing of gold and silver ore previously placed on leach pads prior to ceasing mining operations in November 2021.

CommodityUnits2022202120202019
Gold oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in doré.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202120202019
Stripping / waste ratio  ......  Subscription required0.71 0.08
Ore tonnes mined  ......  Subscription required6,814 k tons4,086 k tons
Waste  ......  Subscription required4,815 k tons321 k tons
Total tonnes mined  ......  Subscription required11,629 k tons4,407 k tons
Subscription required - Subscription is required.

Reserves at March 27, 2023:
Mineral Resources was calculated with approximately Cutoff, AuEq: for Oxide - 0.002 oz/ton; for Sulphide - 0.01 oz/ton.

Mineral resources based on metal prices of $1,900/troy oz Au and $24.50/troy oz Ag.

CategoryOreTypeTonnage CommodityGradeContained Metal
Measured Sulphide 402,735 k tons Gold 0.013 oz/ton 5,236 koz
Measured Oxide 94,162 k tons Gold 0.008 oz/ton 753 koz
Measured Total 496,897 k tons Gold 0.012 oz/ton 5,989 koz
Measured Sulphide 402,735 k tons Silver 0.5 oz/ton 200,965 koz
Measured Oxide 94,162 k tons Silver 0.17 oz/ton 15,725 koz
Measured Total 496,897 k tons Silver 0.44 oz/ton 216,690 koz
Indicated Sulphide 346,308 k tons Gold 0.012 oz/ton 4,156 koz
Indicated Oxide 59,751 k tons Gold 0.007 oz/ton 436 koz
Indicated Total 406,059 k tons Gold 0.011 oz/ton 4,592 koz
Indicated Sulphide 346,308 k tons Silver 0.39 oz/ton 136,445 koz
Indicated Oxide 59,751 k tons Silver 0.13 oz/ton 7,529 koz
Indicated Total 406,059 k tons Silver 0.35 oz/ton 143,974 koz
Measured & Indicated Sulphide 749,043 k tons Gold 0.013 oz/ton 9,391 koz
Measured & Indicated Oxide 153,913 k tons Gold 0.008 oz/ton 1,189 koz
Measured & Indicated Total 902,956 k tons Gold 0.012 oz/ton 10,581 koz
Measured & Indicated Sulphide 749,043 k tons Silver 0.45 oz/ton 337,410 koz
Measured & Indicated Oxide 153,913 k tons Silver 0.15 oz/ton 23,254 koz
Measured & Indicated Total 902,956 k tons Silver 0.4 oz/ton 360,664 koz
Inferred Sulphide 249,494 k tons Gold 0.012 oz/ton 3,019 koz
Inferred Oxide 46,118 k tons Gold 0.007 oz/ton 337 koz
Inferred Total 295,612 k tons Gold 0.011 oz/ton 3,356 koz
Inferred Sulphide 249,494 k tons Silver 0.36 oz/ton 89,568 koz
Inferred Oxide 46,118 k tons Silver 0.14 oz/ton 6,549 koz
Inferred Total 295,612 k tons Silver 0.33 oz/ton 96,117 koz

Financials:

Units2022202120202019
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Pre-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
After-tax Income M USD  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required


Water Supply
Source: 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 Sep 9, 2023
....................... Subscription required ....................... Subscription required Subscription required Sep 9, 2023
....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Sep 9, 2023
....................... Subscription required ....................... Subscription required Subscription required Sep 9, 2023
....................... Subscription required ....................... Subscription required Subscription required Sep 9, 2023
....................... Subscription required ....................... Subscription required Subscription required Sep 9, 2023
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2022
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 2023
Technical Report 2023
Fact Sheet 2022
Form 10-K 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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