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United States
Lone Mountain Project

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 Location:
300 km E from Reno, Nevada, United States

  Project Contacts:
82 Richmond Street East
Toronto
Ontario, Canada
M5C 1P1
Phone  ...  Subscription required
EmailEmail
WebsiteWeb
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Overview

StagePreliminary Economic Assessment
Mine TypeOpen Pit
Commodities
  • Zinc
  • Lead
Mining Method
  • Truck & Shovel / Loader
Mine Life12 years (as of Jan 1, 2019)


Owners

Source: p. 8
CompanyInterestOwnership
Nevada Zinc Corp. 100 % Indirect
The Project property holdings are held by Lone Mountain Zinc Ltd., a Nevada corporation that is a wholly owned subsidiary of Nevada Zinc.

Contractors

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Deposit Type

  • Carbonate hosted
  • Vein / narrow vein
  • Replacement


Summary:

The zinc-lead mineralization of the Lone Mountain Property is constrained to the Devils Gate limestone/dolostone. There are two distinct types of mineralization found on the Property. The first type of mineralization is easily distinguishable from the grey host dolostone by its pink, red, yellow, orange to brown colour and produces both high and low grade assay results. This mineralization occurs in the brecciated dolostone of the Devils Gate Formation and is composed mainly of smithsonite and hemimorphite as fine grained aggregates or crystalline components filling voids. The breccia is often clast supported but the mineralization can be found within the colourful fine-grained matrix of the breccia or in dolostone clasts. Lesser amounts of lead occur with this type of mineralization however no significant lead minerals were detected in recent mineralogical work. The second type of mineralization is more difficult to define as there appears to be no significant colour or textural differences to distinguish the mineralization from the fine to medium grained host dolostone. The mineralization is grey to grey-white and produces both high grade and low-grade assay results. White crystalline and fine-grained barite and carbonate (mostly calcite) veins are ubiquitous across the Property.

The mineralization is predominately hemimorphite (Zn silicate-hydroxide), smithsonite (Zn carbonate) and Zn-bearing dolomite. Within the Extension Shaft area of the Lone Mountain Mine, t ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The current drilling program is part of a work program designed to evaluate the potential of the Project to host near surface zinc-lead Mineral Resources that could potentially be mined using low cost open pit mining techniques. The majority of the drill holes reported to-date from the Mountain View Mine Property and the Discovery Zone area of the Project have intersected near surface zinc-lead mineralization that is now known to extend from surface to a depth of approximately 250 meters beyond which it remains open to further expansion.


Crushing and Grinding
Source: Subscription required

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Processing

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Summary:

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Projected Production:

CommodityProductUnitsAvg. Annual
Zinc Concentrate kt 36
Zinc Metal in concentrate M lbs 35

Operational Metrics:

Metrics
Daily milling rate 800 t *
Stripping / waste ratio 8 *
Daily ore mining rate 800 t *
Annual milling capacity 277,400 t *
Annual ore mining rate 277,400 t *
* According to 2019 study.

Reserves at June 27, 2019:
The Mineral Resource Estimate reported at 2% Zn cut-off.

CategoryTonnage CommodityGradeContained Metal
Inferred 3,257 kt Zinc 7.57 % 543 M lbs
Inferred 3,257 kt Lead 0.7 %

Commodity Production Costs:

CommodityUnitsAverage
Cash costs Zinc USD  ......  Subscription required&nbs
Assumed price Zinc USD  ......  Subscription required&nbs
* According to 2019 study / presentation.

Operating Costs:

Units2019
OP mining costs ($/t milled) USD 19.5 *
Processing costs ($/t milled) USD  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2019 study.
Subscription required - Subscription is required.

2019 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Pre-Production capital costs $M USD  ......  Subscription required
Sustaining CapEx $M USD  ......  Subscription required
Closure costs $M USD  ......  Subscription required
Total CapEx $M USD  ......  Subscription required
Pre-tax NPV @ 8% $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.


Heavy Mobile Equipment:

Mine Management:

Job TitleNamePhoneEmailRef. Date
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Dec 12, 2022
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2019

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
Press Release 2022
................................... Subscription required 2021
................................... Subscription required 2019
................................... Subscription required 2019
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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