Overview
Stage | Preliminary Economic Assessment |
Mine Type | Open Pit & Underground |
Commodities |
|
Mining Method |
- Truck & Shovel / Loader
- Longhole open stoping
- Backfill
|
Mine Life | 12 years (as of Jan 1, 2020) |
October 12, 2022 - Rockhaven Resources is announced the completion of the 2022 exploration program at its 100% owned and road-accessible Klaza property.
The 2022 program was designed to upgrade as many of the remaining inferred mineral resources to the indicated category as possible for their inclusion in the upcoming Pre-feasibility study. Additionally, all of the required information from site-based work was collected, which included geotechnical, ground stability, environmental and metallurgical data. The company anticipates the completion of the fully-funded Pre-feasibility study by mid-2023. |
Source:
p. 2
The Property comprises 1,478 mineral claims that are 100% owned by Rockhaven.
Contractors
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Deposit Type
- Breccia pipe / Stockwork
- Epithermal
- Vein / narrow vein
Summary:
The metals of primary interest at the Property are gold and silver. These metals are intimately associated with lead, zinc and copper in various forms and concentrations throughout the mineralizing system. Gold and silver enriched mineralization is developed within a northwest trending structural corridor, which is interpreted to have focused fluid flow away from weak porphyry centres related to a Late Cretaceous stock in the southeastern corner of the Property. Several of the mineralized structural zones are continuously mineralized for strike lengths of up to 2,400 m, and at least one of the structures is mineralized to a depth of 520 m down-dip from the current geographic surface. The mineralized structures remain open to extension along strike and down-dip.
Fluid inclusion work reveals that the veins formed at shallow depths (<1 km) and have low to intermediate sulfidation epithermal fluid characteristics (Main, 2015). Textures and mineralogy observed at the Property share a number of similarities with Carbonate Base Metal (CBM) deposits (Tarswell and Turner, 2013).
CBM deposits are a recently recognized sub-class of epithermal deposits that encompass a family of similar deposits located around the world. CBM deposits have mainly been discovered around the Pacific Rim and include multi-million ounce gold deposits such as Porgera (New Guinea), Buritica (Colombia) and Kelian (Indonesia).
The CBM class of deposits has yet to be identified el ........

Mining Methods
- Truck & Shovel / Loader
- Longhole open stoping
- Backfill
Summary:
Mineral Resources occur as a selection of vein systems contained in two distinct zones–Klaza and BRX. Each zone can be further broken down by relative location: Western, Central and Eastern. At Central Klaza and BRX potential exists in the eastern extremity for underground mining. The eastern extent is naturally separated from the Central zone by low grade mineralization. The eastern extent of the Central Klaza zone will be accessed from the Klaza pit and at Central BRX zone via underground level development.
The Klaza and BRX zones lend themselves to open pit mining as the mineralized veins are located close to surface. The surrounding topography is moderately steep with sufficient flat areas suitable for the placement of waste dumps and stockpiles. Open pit mining plans to use conventional drill-and-blast equipment and truck and excavator mining equipment supplied by a contractor. Recommendations for the pit slope design are based on probabilistic kinematic analyses. The bench height was limited to 10 m. The berm width of 6.0 m is considered to be sufficient to ensure retention of bench-scale size failures.
Mineralization has been identified through exploration drilling below the potential open pits to a depth of approximately 450 m below surface. Both zones remain open at depth and along strike. Both the Klaza and BRX zones are amenable to mining by underground methods. The proposed underground mining method is Longhole stoping with waste rock fill. ........

Source:

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Flow Sheet:
Summary:

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Reserves at July 5, 2018:
Cut-off grades applied to the pit constrained are 1.0 g/t AuEq.
Cut-off grades applied to the underground are 2.3 g/t AuEq.
Category | OreType | Tonnage | Commodity | Grade | Contained Metal |
Indicated
|
In-Situ (OP)
|
2,447 kt
|
Gold
|
5.3 g/t
|
414 koz
|
Indicated
|
In-Situ (UG)
|
2,010 kt
|
Gold
|
4.2 g/t
|
272 koz
|
Indicated
|
In-Situ (OP)
|
2,447 kt
|
Silver
|
90 g/t
|
7,096 koz
|
Indicated
|
In-Situ (UG)
|
2,010 kt
|
Silver
|
108 g/t
|
6,974 koz
|
Indicated
|
In-Situ (OP)
|
2,447 kt
|
Lead
|
0.7 %
|
39,143 k lbs
|
Indicated
|
In-Situ (UG)
|
2,010 kt
|
Lead
|
0.8 %
|
34,125 k lbs
|
Indicated
|
In-Situ (OP)
|
2,447 kt
|
Zinc
|
1 %
|
52,935 k lbs
|
Indicated
|
In-Situ (UG)
|
2,010 kt
|
Zinc
|
0.9 %
|
39,172 k lbs
|
Indicated
|
In-Situ (OP)
|
2,447 kt
|
Gold Equivalent
|
6.7 g/t
|
529 koz
|
Indicated
|
In-Situ (UG)
|
2,010 kt
|
Gold Equivalent
|
5.8 g/t
|
378 koz
|
Inferred
|
In-Situ (OP)
|
1,754 kt
|
Gold
|
2.6 g/t
|
147 koz
|
Inferred
|
In-Situ (UG)
|
3,960 kt
|
Gold
|
2.8 g/t
|
359 koz
|
Inferred
|
In-Situ (OP)
|
1,754 kt
|
Silver
|
43 g/t
|
2,429 koz
|
Inferred
|
In-Situ (UG)
|
3,960 kt
|
Silver
|
90 g/t
|
11,472 koz
|
Inferred
|
In-Situ (OP)
|
1,754 kt
|
Lead
|
0.4 %
|
14,897 k lbs
|
Inferred
|
In-Situ (UG)
|
3,960 kt
|
Lead
|
0.7 %
|
62,647 k lbs
|
Inferred
|
In-Situ (OP)
|
1,754 kt
|
Zinc
|
0.5 %
|
18,599 k lbs
|
Inferred
|
In-Situ (UG)
|
3,960 kt
|
Zinc
|
0.8 %
|
70,578 k lbs
|
Inferred
|
In-Situ (OP)
|
1,754 kt
|
Gold Equivalent
|
3.3 g/t
|
187 koz
|
Inferred
|
In-Situ (UG)
|
3,960 kt
|
Gold Equivalent
|
4.2 g/t
|
538 koz
|
Corporate Filings & Presentations:
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