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United States
Goldstrike Project

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 Location:
42 km NW from St. George, Utah, United States

  Project Contacts:
Suite 1900, 1055 West Hastings Street
Vancouver
British Columbia, Cameroon
V6E 2E9
Phone  ...  Subscription required
Faxinfo@libertygold.ca
WebsiteWeb
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  • Fleet
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  • Filings & News

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Overview

StagePreliminary Economic Assessment
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Mine Life7.5 years (as of Jan 1, 2018)
2023 Work Program: With the completion of the exploration drilling program in 2022, attention will focus largely on key de-risking activities, in particular procurement of a process water supply ahead of further detailed work.


Owners

Source: p. 7, 9
CompanyInterestOwnership
Liberty Gold Corp. 100 % Indirect
Liberty Gold holds its interest in the Goldstrike Project through its indirect subsidiary, Pilot Goldstrike Inc., a Nevada, USA Corporation.

Contractors

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Deposit Type

  • Carlin-type
  • Breccia pipe / Stockwork
  • Vein / narrow vein


Summary:

Goldstrike mineralization is best described to be in the class of sedimentary rock-hosted Carlin-style deposits. The Carlin-style class of gold deposits are not unique to the eastern Great Basin. They are characterized by concentrations of very finely disseminated gold in silty, carbonaceous, and calcareous rocks. The gold is present as micron-size to sub-micron-size disseminated grains, often internal to iron-sulphide minerals (arsenical pyrite is most common) or with carbonaceous material in the host rock. Free particulate gold, and particularly visible free gold, is not a common characteristic of these deposits; significant placer alluvial concentrations of gold are therefore not commonly associated with eroded Carlin-style gold deposits.

All Carlin-style deposits in the Great Basin have some general characteristics in common, although there is a wide spectrum of variants. Anomalous concentrations of arsenic, antimony, and mercury are typically associated with the gold mineralization; thallium, tungsten, and molybdenum may also be present in trace amounts. Alteration of the gold-bearing host rocks of Carlin-type deposits is typically manifested by decalcification, often with the addition of silica, fine-grained disseminated sulphide minerals, remobilization and/or the addition of carbon, and late-stage barite and/or calcite veining. Small amounts of white clays (illite) can also be present. Decalcification of the host produces volume loss, with incipient collaps ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The PEA Study utilizes open pit mining with mine planning based on economic pit shells generated by mine planning software. Mine production is planned at 22,500 tonnes per day or 8.2 million tonnes per year of leach feed (mineralized) material. With an average waste to leach feed material strip ratio of 1.2 to 1, the average mining rate is approximately 50,000 tonnes per day of leach feed and waste material. The open pit mining at Goldstrike was designed utilizing an owner-operated, conventional mine fleet of front end loaders and trucks.

At the Goldstrike project, stable open pit slopes were developed during previous mining at slope angles of about 50 degrees up to slope heights of 220 m in the Paleozoic rocks where geologic structure orientations are favorable for slope stability. In some of the existing pits, the slopes that appear to have been developed with inter-ramp slopes of 50 degrees became unstable during or after mining. Typically, the unstable slopes in the existing pits are composed of either altered and weathered Tertiary age volcanic rock or Paleozoic rocks containing geologic structures in orientations unfavorable for stability. For the PEA, the existing pits will in some cases be deepened to produce slope heights ranging from 20 to 220 m, and new pits will be developed in areas where there are no existing pits.

The stability of planned open pits was evaluated by comparing the geologic conditions, groundwater and other conditions that r ........


Crushing and Grinding


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityUnitsAvg. AnnualLOM
Gold oz 94,493713,004
All production numbers are expressed as metal in doré.

Operational Metrics:

Metrics
Stripping / waste ratio 1.2 *
Daily mining rate 50,000 t *
Daily mining capacity 57,000 t *
Daily ore mining rate 22,500 t *
Waste tonnes, LOM 70.6 Mt *
Ore tonnes mined, LOM 59.3 Mt *
Total tonnes mined, LOM 129.9 Mt *
Daily processing rate 22,500 t *
Tonnes processed, LOM 59.3 Mt *
Annual processing rate 8.2 Mt *
Annual ore mining rate 8.2 Mt *
* According to 2018 study.

Reserves at February 8, 2018:
The classified mineral resource estimate is quoted at a cut-off grade of 0.20 g/t Au.

CategoryTonnage CommodityGradeContained Metal
Indicated 57,846 kt Gold 0.5 g/t 925 koz
Inferred 19,603 kt Gold 0.47 g/t 296 koz

Commodity Production Costs:

CommodityUnitsAverage
Cash costs Gold USD 641.77 / oz *  
Total cash costs Gold USD 675.11 / oz *  
All-in sustaining costs (AISC) Gold USD 792.72 / oz *  
Assumed price Gold USD 1,300 / oz *  
* According to 2018 study / presentation.

Operating Costs:

Units2018
OP mining costs ($/t mined) USD 4.59 *
Processing costs ($/t milled) USD  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2018 study.
Subscription required - Subscription is required.

2018 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M USD  ......  Subscription required
Working capital $M USD  ......  Subscription required
Sustaining CapEx $M USD  ......  Subscription required
Closure costs $M USD  ......  Subscription required
Total CapEx $M USD  ......  Subscription required
OP OpEx $M USD  ......  Subscription required
Processing OpEx $M USD 117.5
G&A costs $M USD 35.2
Total OpEx $M USD  ......  Subscription required
Income Taxes $M USD  ......  Subscription required
Net revenue (LOM) $M USD  ......  Subscription required
Operating margin, %  ......  Subscription required
Pre-tax Cash Flow (LOM) $M USD  ......  Subscription required
After-tax Cash Flow (LOM) $M USD  ......  Subscription required
Pre-tax NPV @ 5% $M USD  ......  Subscription required
After-tax NPV @ 0% $M USD  ......  Subscription required
After-tax NPV @ 5% $M USD  ......  Subscription required
After-tax NPV @ 8% $M USD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
After-tax payback period, years  ......  Subscription required
Subscription required - Subscription is required.

Pipelines and Water Supply
Source: Subscription required

- subscription is required.


Proposed Heavy Mobile Equipment as of July 16, 2018:
HME TypeModelSizeQuantity
Dozer ....................... Subscription required 4.4 m blade width ....................... Subscription required
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Subscription required - Subscription is required.

Mine Management:

Job TitleNamePhoneEmailProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jan 31, 2023
....................... Subscription required ....................... Subscription required Subscription required Feb 8, 2018
....................... Subscription required ....................... Subscription required Subscription required Feb 8, 2018
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Jan 31, 2023
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2018

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
Preliminary Economic Assessment 2018
Press Release 2018
Technical Report 2018
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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