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United States
Moss Expansion Project (Moss)

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 Location:
8.5 rm SE from Bullhead City, Arizona, United States

  Project Contacts:
2011 Plata Caleta
Bullhead City
Arizona, United States
86442
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Fax928-763-6259
EmailEmail
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  • Overview
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  • Geology
  • Mining
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  • Reserves
  • Costs & Financials
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  • Filings & News

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Overview

StagePermitting
Mine TypeOpen Pit
Commodities
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Mine Life10 years (as of Jan 1, 2017)
On March 18th, 2020, the Bureau of Land Management issued a Decision Record announcing the completion of the National Environmental Policy Act review of an expansion at Moss Mine. An Environmental Assessment (EA) was used to analyze the Company's Mine Plan of Operation (MPO) which resulted in a Finding of No Significant Impact (FONSI). The Moss Mine incorporated Environmental Protection Measures into the MPO that protect natural resources and habitat and prevent impacts to BLM-administered public land. The permitting approval allows the Company to expand its current operations from its patented claims onto its surrounding unpatented claims on public lands. The expansion along with our recently announced resource update (see press release dated March 17, 2020) is expected to significantly extend the life of the Moss Mine.


Owners

Source: p. 3
CompanyInterestOwnership
Elevation Gold Mining Corp. 100 % Indirect
Golden Vertex Corp. (operator) 100 % Direct
Elevation Gold Mining Corp.’s primary project is the Moss Mine gold-silver deposit in Mohave County, Arizona which is operated by Golden Vertex.

Contractors

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Deposit Type

  • Epithermal
  • Vein / narrow vein
  • Breccia pipe / Stockwork


Summary:

The Moss deposit is a steeply dipping (average 70°) quartz-calcite vein and stockwork system, which extends over a strike length of approximately 1,400 m in the project area, but can be traced for more than 5.6 km in total length.

The Moss vein system is considered a high level, low-sulfidation (adularia-sericite) epithermal gold-silver deposit in the classification of Heald et al (1987) and White and Hedenquist (1995). Low sulfidation epithermal deposits form from hydrothermal waters in the relatively near-surface environment, typically within 1.5 km of the earth’s surface (Taylor, 2007). They are commonly found associated with magmatism and volcanism, but are somewhat distal (vertically or laterally) from the actual center of magmatism, in environments where meteroric waters have mixed with and diluted magmatic waters.

Epithermal deposits comprise one of three sub- types: high sulphidation; intermediate sulphidation; and low sulphidation. Each sub-type is identified by characteristic alteration and ore-stage mineral assemblages, occurrences, textures and suites of associated geochemical elements. The designation of high sulfidation vs low sulfidation is based on the sulfidation state of the ore-stage sulfide suite, not the abundance of sulfides in the ore. However, precious metals mineralization at Moss is characterized by a low sulfidation suite of minerals and a very low sulfide content (<1%) as well.

The quartz-calcite vein text ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

Exploitation of the mineral reserves in the Moss vein and adjacent stockworks on the patented lands will be by open pit mining methods with a conventional drill-blast-load-haul mining fleet.

The PEA mine design removes the patented claims boundary constraint by assuming the pit limits can be extended onto the adjacent Federal lands controlled by the BLM. This allows the PEA mine plan to access the mineral resources not available in the Phase II mine plan. Concurrent with expansion of the pit, the mine facilities would also need to be expanded onto the BLM lands. This would include an expanded heap leach pad to accommodate the additional mineralized material, and an expanded waste rock facility to accommodate the additional waste rock.


Crushing and Grinding
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Processing

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Summary:

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Projected Production:

CommodityProductUnitsLOM
Gold Payable metal koz 313
Gold Metal in doré koz 313
Silver Payable metal koz  ......  Subscription required
Silver Metal in doré koz  ......  Subscription required
Gold Equivalent Payable metal koz  ......  Subscription required
Gold Equivalent Metal in doré koz  ......  Subscription required

Operational Metrics:

Metrics
Stripping / waste ratio 1.85 *
Daily milling capacity 5,000 t *
Waste tonnes, LOM 31,601 kt *
Ore tonnes mined, LOM 17,083 kt *
Total tonnes mined, LOM 48,684 kt *
Tonnes milled, LOM 17,083 kt *
Annual ore mining rate 1.9 Mt *
* According to 2017 study.

Reserves at October 10, 2017:
A variable gold cut-off was estimated based on a mining cost of US$2.04/t mined, and a total process and G&A operating cost of US$6.22/t of ore mined. Primary material is based on a cut-off of 0.25 g/t Au, and low grade material is based on a cut-off of 0.2 g/t Au. The overall cutoff grade applied in the table above is 0.20 g Au/t.

CategoryTonnage CommodityGradeContained Metal
Measured 5,138 kt Gold 0.94 g/t 155 koz
Measured 5,138 kt Silver 10.15 g/t 1,676 koz
Indicated 10,161 kt Gold 0.62 g/t 201 koz
Indicated 10,161 kt Silver 7.93 g/t 2,592 koz
Measured & Indicated 15,299 kt Gold 0.72 g/t 357 koz
Measured & Indicated 15,299 kt Silver 8.68 g/t 4,268 koz
Inferred 1,785 kt Gold 0.44 g/t 5 koz
Inferred 1,785 kt Silver 5.37 g/t 308 koz

Commodity Production Costs:

CommodityUnitsAverage
Cash costs Gold Equivalent USD 527 / oz *  
Cash costs Gold Equivalent USD 418 / oz *†  
All-in sustaining costs (AISC) Gold Equivalent USD 603 / oz *†  
Assumed price Silver USD 20 / oz *  
Assumed price Gold USD 1,250 / oz *  
* According to 2017 study / presentation.
† Net of By-Product.

Operating Costs:

Units2017
OP mining costs ($/t milled) USD 5.53 *
Processing costs ($/t milled) USD  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2017 study.
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2017 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M USD  ......  Subscription required
Sustaining CapEx $M USD  ......  Subscription required
Total CapEx $M USD  ......  Subscription required
OP OpEx $M USD  ......  Subscription required
Processing OpEx $M USD 84.2
Refining costs $M USD  ......  Subscription required
G&A costs $M USD 13.3
Total OpEx $M USD  ......  Subscription required
Total Taxes $M USD  ......  Subscription required
Royalty payments $M USD  ......  Subscription required
Gross revenue (LOM) $M USD  ......  Subscription required
Net Income (LOM) $M USD  ......  Subscription required
Pre-tax NPV @ 0% $M USD  ......  Subscription required
Pre-tax NPV @ 5% $M USD  ......  Subscription required
Pre-tax NPV @ 10% $M USD  ......  Subscription required
After-tax NPV @ 0% $M USD  ......  Subscription required
After-tax NPV @ 5% $M USD  ......  Subscription required
After-tax NPV @ 10% $M USD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
Pre-tax payback period, years  ......  Subscription required
After-tax payback period, years  ......  Subscription required
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Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Nov 10, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 10, 2022
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Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
Preliminary Economic Assessment 2017
Press Release 2017
Feasibility Study Report 2015
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