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United States
Tonopah Project

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 Location:
26 km NE from Tonopah, Nevada, United States

  Project Contacts:
#302 – 8047 199 Street
Langley
British Columbia, Canada
V2Y 0E2
Phone  ...  Subscription required
EmailEmail
WebsiteWeb
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  • Overview
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Overview

StagePreliminary Economic Assessment
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Mine Life6 years (as of Jan 1, 2020)


Owners

Source: p. 2
CompanyInterestOwnership
Viva Gold Corp. (operator) 100 % Direct
The Project consists of 444 unpatented lode claims covering an area of 8,762 acres. All unpatented claims are 100% controlled by Viva Gold Corporation (Viva).

Contractors

Subscription required - Subscription is required.


Deposit Type

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


Summary:

The Tonopah property contains a low-sulfidation epithermal gold system associated with near vertical quartz-adularia-gold veins hosted by Ordovician black argillite of the Palmetto Formation and Tertiary rhyolitic volcanics and also in association with a discontinuity at the contact with the top of the Palmetto Formation and lower sequence of the Tertiary volcanics. Gold bearing veins occur in a series of enechelon clusters along a 1.5-mile northwest-trending band of mineralization. Contact related gold mineralization is also seen along this entire band. The main altered and mineralized zones are overlain by alluvial gravels, sand dunes, and playa deposits.

Structural geology significantly influences the distribution of mineralization and alteration at Tonopah. The Rye Patch fault system is a complex, oblique-slip fault system with numerous northwest trending splays, believed to be associated with north-south trending compressional stress common in the Walker Lane structural trend. Subordinate steeply dipping, north-south striking extension fractures developed between the two bounding strike slip faults.

Detailed structural studies of bedrock exposures and oriented core from 22 drill holes indicate that alteration and mineralization developed between two moderately northeast dipping faults with rightlateral strike slip movement. Veins and hydrothermal breccias developed along sub-parallel, north-south extension fractures that terminate at the northwest ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Tonopah Property as planned in this report has a project life of 8 years, consisting of 2 years of preproduction, 5 years of mining and heap stacking, and one year of final gold recovery, pad rinsing and reclamation work. Mining will be done using traditional, open pit surface mining techniques. Mine operating and capital costs assume self-mining.

Three successive phases for the pit were designed based on the Lerchs-Grossman shape analysis and minimum push-back widths. These designs account for limitations based on minimum mining widths and wall angles indicative of operational feasibility. Pit exits have been designed to the north and east pit edges where feasible to minimize haul distances to the crusher and waste dump locations. The ultimate pit shape was based on the boundaries in the 91% price Lerchs-Grossman shape discussed in the previous sub-section. The target for road gradient through the main portion of the pits was 10%, with a 12% target in the final two benches. However, some stretches of road exceed the 10% target in small localized areas. A more detailed pit design will be done in future studies.

The ultimate pit shown is the combination of three phases composed of combinations of smaller pit bottoms within the greater geometry. There are a total of seven smaller pit bottoms in the ultimate shape. The first phase takes the first and highest grade pit threshold. The second phase includes four additional pit bottoms. The third and fin ........


Crushing and Grinding

Mineralization scheduled for mining is trucked to a 3 stage crushing plan located near the north eastern edge of the final pit. After crushing the material will be conveyed and stacked on the leach pad for gold recovery.


Processing

Source: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityUnitsAvg. AnnualLOM
Gold koz 45226

Operational Metrics:

Metrics
Daily processing capacity 7 kt *
Annual ore mining rate 2.5 Mt *
Annual processing capacity 2.5 Mt *
Stripping / waste ratio 4.6 *
Waste tonnes, LOM 57,805 kt *
Ore tonnes mined, LOM 12,487 kt *
Total tonnes mined, LOM 70,291 kt *
Tonnes processed, LOM 12,500 kt *
* According to 2020 study.

Reserves at April 29, 2020:
Resources are presented at a 0.250 g/t (ppm) cutoff grade in argillite and 0.200 g/t (ppm) in volcanics, and inside a $1600/oz Au pit optimization shell.

CategoryTonnage CommodityGradeContained Metal
Measured 3,930 kt Gold 1.14 g/t 141,000 oz
Indicated 8,900 kt Gold 0.65 g/t 185,000 oz
Measured & Indicated 12,830 kt Gold 0.79 g/t 326,000 oz
Inferred 8,400 kt Gold 0.67 g/t 181,000 oz

Commodity Production Costs:

CommodityUnitsAverage
Cash costs Gold USD  ......  Subscription required
All-in sustaining costs (AISC) Gold USD  ......  Subscription required
Assumed price Gold USD  ......  Subscription required
* According to 2020 study / presentation.

Operating Costs:

Units2020
OP mining costs ($/t mined) USD 1.28 *  
OP mining costs ($/t milled) USD  ......  Subscription required
Processing costs ($/t milled) USD  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2020 study.
Subscription required - Subscription is required.

2020 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $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 56.5
G&A costs $M USD 8.2
Total OpEx $M USD  ......  Subscription required
Total Taxes $M USD  ......  Subscription required
Royalty payments $M USD  ......  Subscription required
EBITDA (LOM) $M USD  ......  Subscription required
Net Income (LOM) $M USD  ......  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
Pre-tax NPV @ 10% $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
Subscription required - Subscription is required.


Proposed Heavy Mobile Equipment as of April 29, 2020:
HME TypeModelSizeQuantityLeased or
Contractor
ANFO Loader ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
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....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
Subscription required - Subscription is required.

Mine Management:

Job TitleNamePhoneProfileRef. Date
....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Apr 29, 2020
....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Apr 29, 2020
....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Jan 11, 2021
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2020

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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