Overview
Stage | Residual leach |
Mine Type | Open Pit |
Commodities |
|
Production Start | ... |
The gold and silver produced at the Ruby Hill Project is due to the processing of residual heap leach minerals and loaded carbon on site. The Corporation has not added material to the heap leach pad since Q4 2021. The Corporation expects the pad to be fully depleted by 2023.
Five main initiatives are planned at Ruby Hill for 2023 including a residual leach program, a large-scale exploration drilling program, initial economic work for the planned Ruby Deeps underground gold mine to be developed at Ruby Hill, permitting to allow for the commencement of underground development and advanced metallurgical work for the recoveries of gold and polymetallic base metal mineralization for mining and processing planning.
On November 2022, the Company completed a scoping study for the restart of the existing oxide mill and subsequent conversion to a base metals facility. |
Latest News | i-80 Gold Provides High-Grade Results from Drilling at Ruby Hill February 26, 2024 |
Source:
p. 9,18
On September 3, 2021, i-80 Gold Corp., together with Premier USA, entered into a membership interest purchase agreement with affiliates of Waterton, pursuant to which Premier USA agreed to acquire from Waterton all of the outstanding membership interests of Ruby Hill LLC, the 100% owner of the Ruby Hill Project. The Ruby Hill Acquisition closed on October 15, 2021, and upon closing thereof, Ruby LLC became an indirect, wholly-owned subsidiary of the Corporation.
Contractors
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Deposit Type
- Carlin-type
- Intrusion related
- Skarn
- Carbonate replacement
Summary:
The Ruby Hill Project is located along the southeastern end of the Battle Mountain/Eureka gold trend. The Eureka gold mining district exposes a nearly continuous sequence of Cambrian and Ordovician sedimentary rocks approximately 10,000' thick consisting of primarily carbonate units with subordinate shale and quartz sandstone.
Mineralization at Ruby Hill is characterized by early polymetallic, intrusive-related carbonate replacement and skarn deposits that have been overprinted by younger Carlin-type precious metal mineralization.
Within the Property area, two styles of mineralization occur:
• Early polymetallic (Au-Ag-Pb-Zn) skarn or carbonate replacement deposit (CRD): Blackjack and TL).
• Late Au±Ag Carlin-type: East Archimedes, West Archimedes, 426, Ruby Deeps, Mineral Point zones.
The polymetallic skarn and CRD style is the oldest mineralization event recognized at the Property and related to emplacement of the Cretaceous intrusive units. The precious metal-rich Carlin style overprints the older CRD event and interpreted to have developed during early-middle Cenozoic (Eocene) times, similar to other Au-Ag deposits of the Battle Mountain/Eureka Trend. Mineralization is largely controlled by lithology and structure.
Gold-silver mineralization occurs broadly as a near N-trending zone (Mineral Point Trend), consisting of smaller zones of structurally and lithologically controlled deposits (East and West Archimedes, 426, Ruby Deeps, Mineral Point, Achilles, and Hector). ........
Summary:
The Archimedes deposit of the Ruby Hill Gold Mine is comprised of the West Archimedes, East Archimedes, Blackjack, 426 and Ruby Deeps zones. At Ruby Hill Project, the open pit mine was on care and maintenance following a slope failure on the south wall of the pit that caused suspension of mining activities in 2013. Ruby Hill Mining Company LLC (RHMC) continued to irrigate and recover gold from the heap leach pads and re-activated the open pit in 2020 to mine 12 benches on the north wall of the pit to the level of the slide material from the south wall that filled bottom of the pit.
The Archimedes open pit, fully depleted in Q4 2021. The gold and silver produced at the Ruby Hill Project is due to the processing of residual heap leach minerals and loaded carbon on site. The Corporation has not added material to the heap leach pad since Q4 2021. The Corporation expects the pad to be fully depleted by 2023.
The Company is in the process of advancing permitting for an underground operation, including the construction of a decline from the bottom of the current Archimedes pit.
Source:
Summary:
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Reserves at July 31, 2021:
Open Pit Mineral resources are shown above a 0.1 g/t Au cut-off grade.
Underground Mineral Resources are shown above a 3.6 g/t Au cut-off grade.
Category | OreType | Tonnage | Commodity | Grade | Contained Metal |
Indicated
|
In-Situ (OP)
|
224.4 Mt
|
Gold
|
0.54 g/t
|
3,874 koz
|
Indicated
|
In-Situ (UG)
|
1.2 Mt
|
Gold
|
5.22 g/t
|
202 koz
|
Indicated
|
In-Situ (OP)
|
224.4 Mt
|
Silver
|
14.3 g/t
|
103,335 koz
|
Indicated
|
In-Situ (UG)
|
1.2 Mt
|
Silver
|
0.6 g/t
|
22 koz
|
Inferred
|
In-Situ (OP)
|
162.7 Mt
|
Gold
|
0.39 g/t
|
2,062 koz
|
Inferred
|
In-Situ (UG)
|
8.21 Mt
|
Gold
|
6.02 g/t
|
1,588 koz
|
Inferred
|
In-Situ (OP)
|
162.7 Mt
|
Silver
|
14 g/t
|
73,472 koz
|
Inferred
|
In-Situ (UG)
|
8.21 Mt
|
Silver
|
1.7 g/t
|
439 koz
|
Commodity Production Costs:
| Commodity | Units | 2022 |
Credits (by-product)
|
Gold
|
USD
|
......
|
Cash costs
|
Gold
|
USD
|
|
Total cash costs (sold)
|
Gold
|
USD
|
......
|
All-in sustaining costs (AISC)
|
Gold
|
USD
|
|
All-in sustaining costs (sold)
|
Gold
|
USD
|
......
|
† Net of By-Product.
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Financials:
| Units | 2022 |
Revenue
|
M USD
| ...... |
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Corporate Filings & Presentations:
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News:
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