Overview
Stage | Preliminary Economic Assessment |
Mine Type | Open Pit |
Commodities |
|
Mining Method |
|
Mine Life | 9 years (as of Jan 1, 2023) |
Sandman is an advanced exploration & development gold project in Nevada with near-term production potential.
On April 25, 2023, the Company reported completion of its Sandman Preliminary Economic Assessment Phase 2 Study at the Sandman Project. The Scoping Phase 2 Study focused on mining gold mineralized material within optimized pit shells in two phases: Phase 1 mines all mineralized material within the pit shell above the water table (Phase 1 Study previously announced September 12, 2022) and Phase 2 study focused on mineralized material below the water table and within the pit shell, after completion of additional monitoring, permitting and dewatering efforts. |
Source:
p. 15
The underlying title for the Sandman Property claims and the private land is held in the name of Sandman Resources Inc, which is 100% owned by Gold Bull.
Contractors
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Deposit Type
- Breccia pipe / Stockwork
- Vein / narrow vein
- Epithermal
Summary:
Deposit Type
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.
Sandman is located in north-central Nevada, which contains a number of vein-type deposits of middle Miocene age which have similar geology consistent with low sulfidation, epithermal gold-silver deposits. The epithermal deposits in north-central Nevada formed at shallow depth, and some are associated with sinter deposits which reflect hotspring activity at the paleosurface.
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. These are likely pre mineral phase.
Although the genetic model for the Sandman deposits and surrounding gold-silver deposits may be similar there are often significant variations within each deposit type due to variations in the structural framework and host rock porosity compositions.
The presence of gold-silver hosted within a pipe-like hydrothermal breccia, structurally controlled gold mineralization associated w ........
Summary:
The Sandman Project is planned to be mined using conventional open pit mining methods on the four (4) separate deposits
The Project is planned to be mined using conventional open pit mining methods on the four (4) separate deposits in the order below with above water table mining conducted sequentially as part of Phase 1, followed by below water table mining sequentially as part of Phase 2.
1. North Hill
2. Silica Ridge
3. SE Pediment
4. Abel Knoll
The mine plan was based on efficient extraction of all mineralized material and starts at the North Hill deposit (predicted higher-grade and low strip ratio) and then working the deposits in a southerly direction without regard to Indicated and Inferred Mineral Resource categories. Post commissioning, there is a plan to advance life of mine resources to measured category through development drilling ahead of mining referred reserve definition drilling.
The mine plan will extract all the mineralized material above the water table and then will continue to extract the material below the estimated water table as the dewatering program allows. It has been assumed that two years of efficient dewatering in advance of the mining schedule will allow for “dry pits” below the water table.
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 ........
Source:
Summary:
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Source:
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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.
Category | OreType | Tonnage | Commodity | Grade | Contained 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
|
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