Overview
| Stage | Permitting |
| Mine Type | Open Pit |
| Commodities |
|
| Mining Method |
|
| Mine Life | 10 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 is expected to significantly extend the life of the Moss Mine. |
Source:
p. 12
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 ........
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.
Source:
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Flow Sheet:
Summary:
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Projected Production:
| Commodity | Product | Units | LOM |
|
Gold
|
Payable metal
|
koz
| 313 |
|
Gold
|
Metal in doré
|
koz
| 313 |
|
Silver
|
Payable metal
|
koz
| ...... |
|
Silver
|
Metal in doré
|
koz
| ...... |
|
Gold Equivalent
|
Payable metal
|
koz
| ...... |
|
Gold Equivalent
|
Metal in doré
|
koz
| ...... |
Operational Metrics:
| Metrics | |
|
Daily milling capacity
| 5,000 t * |
|
Annual ore mining rate
| 1.9 Mt * |
|
Stripping / waste ratio
| 1.85 * |
|
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 * |
* 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.
| Category | Tonnage | Commodity | Grade | Contained 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
|
Corporate Filings & Presentations:
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