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United States
Sandman Project

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 Location:
18.5 km NW from Winnemucca, Nevada, United States

  Project Contacts:
Suite 717–1030 West Georgia Street
Vancouver
British Columbia, Canada
V6E 2Y3
Phone  ...  Subscription required
EmailEmail
WebsiteWeb
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Overview

StagePreliminary Economic Assessment
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Mine Life5 years (as of Jan 1, 2022)
The Sandman Scoping Study uses Phase 1, which focuses only on oxides above the water table (which is only 50% of the current resource).


Owners

Source: p. 13
CompanyInterestOwnership
Gold Bull Resources Corp. 100 % Indirect
The underlying title for the mining claims and the private land is held in the name of Sandman Resources Inc, which is 100% owned by Gold Bull.

Contractors

Subscription required - Subscription is required.


Deposit Type

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


Summary:

The geological setting, alteration and characteristics of the gold mineralization defined at Sandman all provide strong evidence that Sandman is a low-sulfidation epithermal style of deposit that formed close to the surface.

Key features at Sandman that support this interpretation include:
• The presence of quartz adularia veins which are in common association with the higher-grade gold mineralization.
• Zones of advanced argillic alteration (opaline silica-quartz-kaolinite-alunite) mainly above the quartz-adularia zone, which extend along some favourable stratigraphic horizons or contacts away from the large structures.

The dominant target types which exist at Sandman for future exploration are largely one of three main deposit types:
1. Extensive shallow and low-grade gold mineralization, typically forming within 100m of the paleo water-table, which more favourable to the more porous host rocks such as basalt, conglomerate and altered diatreme breccia. This deposit type has most prominently been identified at the North Hill deposit to date.
2. Higher grade Au-Ag mineralisation in quartz-adularia small cm side veinlets hosted within feeder structures underneath the broader shallow stratigraphically controlled and lower-grade gold mineralization. This style is evidenced in the Silica Ridge and Southeast Pediment deposits, where potentially larger more continuous zones may exist at greater depths and laterally along the currently defin ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Sandman Project is planned to be mined using conventional open pit mining methods on the four (4) separate deposits

The mining operation will be a dayshift-only schedule with a roster of two production crews on a 4-days on and 4-days off, 12 hours per day.

Pre-production stripping is minimal as mineralisation outcrops at or near surface where mining is anticipated to begin. The pit areas have small shrubs and grasses that can be easily cleared with planned mining equipment.

Open pit mining is currently envisaged to be by diesel-powered equipment, utilizing a combination of one rotary blasthole rig, one 8m3 front-end loader (or similar size excavator), and five, 70-tonne capacity trucks to handle ore and waste. The mining fleet has enough capacity to move up to approximately 5.5Mtpa of total material on a dayshift-only schedule. Support equipment comprising a grader, track dozer(s) and water truck will aid in the mining. Ore will be hauled to the crushing area for stockpiling before being rehandled later for primary crushing. Initially, waste rock will be stored in the waste rock dumps close to the pit to reduce haulage costs. As space and design allows, waste will be backfilled into the pit to reduce haulage costs and surface disturbance.

Haul roads are contemplated to be 9-10m widths for one-way traffic and 18-20m widths for two-way traffic. The final location of the ramps will be optimized to reduce the overall pit slopes and ........


Crushing and Grinding

Mineralized material will be delivered from the open pit to a stockpile adjacent to the crushing plant. The mineralized material will be fed to the crushing plant using a front-end loader and will be crushed and then transported to the heap leach pad via haul trucks.


Processing

Source: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityUnitsAvg. AnnualLOM
Gold oz 35,259176,294
All production numbers are expressed as metal in doré.

Operational Metrics:

Metrics
Stripping / waste ratio  ......  Subscription required
Waste tonnes, LOM  ......  Subscription required
Ore tonnes mined, LOM  ......  Subscription required
Total tonnes mined, LOM  ......  Subscription required
Daily processing capacity  ......  Subscription required
Tonnes processed, LOM  ......  Subscription required
Annual processing rate  ......  Subscription required
Annual processing capacity  ......  Subscription required
Annual mining rate  ......  Subscription required
Annual ore mining rate  ......  Subscription required
* According to 2022 study.
Subscription required - Subscription is required.

Reserves at January 20, 2021:
A cut-off grade of 0.15g/t gold has been applied to the oxidized rock which compares with a cut-off grade for fresh unoxidized rock of 0.3g/t gold.

CategoryOreTypeTonnage CommodityGradeContained Metal
Indicated Oxide 12,991 kt Gold 0.63 g/t 265,100 oz
Indicated Total 18,550 kt Gold 0.73 g/t 433,000 oz
Inferred Oxide 2,377 kt Gold 0.46 g/t 35,500 oz
Inferred Total 3,246 kt Gold 0.58 g/t 60,800 oz

Commodity Production Costs:

CommodityUnitsAverage
All-in sustaining costs (AISC) Gold USD  ......  Subscription required&nbs
Assumed price Gold USD  ......  Subscription required&nbs
* According to 2022 study / presentation.
Subscription required - Subscription is required.

Operating Costs:

Units2022
OP mining costs ($/t milled) USD 6.69 *
Processing costs ($/t milled) USD  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2022 study.
Subscription required - Subscription is required.

2022 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Pre-Production capital costs $M USD  ......  Subscription required
Working capital $M USD  ......  Subscription required
Sustaining CapEx $M USD  ......  Subscription required
Total CapEx $M USD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M USD  ......  Subscription required
Pre-tax NPV @ 10% $M USD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
Pre-tax payback period, years  ......  Subscription required
Subscription required - Subscription is required.


Proposed Heavy Mobile Equipment as of September 12, 2022:
HME TypeSizeQuantityLeased or
Contractor
Drill (blasthole) ....................... 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 is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Feb 7, 2023
....................... Subscription required ....................... Subscription required Subscription required Feb 7, 2023
....................... Subscription required ....................... Subscription required Subscription required Sep 12, 2022
Subscription required - Subscription is required.

Staff:

ContractorsYear
Subscription required 2022

Corporate Filings & Presentations:

DocumentYear
Preliminary Economic Assessment 2022
Press Release 2022
Press Release 2022
................................... Subscription required 2021
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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