Overview
| Stage | Production |
| Mine Type | Underground |
| Commodities |
|
| Mining Method |
|
| Production Start | ...  |
On 18 August 2021, the Evolution announced the completion of the acquisition of the Kundana Assets (Kundana Operations, East Kundana Joint Venture ("EKJV"), Carbine Project, West Kundana Joint Venture (“WKJV”). The integration of the Kundana assets is well underway to create “One Mungari” with standardised systems and processes, and the sharing of equipment and workforce across what were previously three separately run operations. |
Source:
p. 27
Effective date 18 August 2021, Evolution acquired Kundana Assets in Western Australia. Kundana Assets represent 100% interest in the Kundana Operations; a 51% interest in the East Kundana Joint Venture; a 100% interest in certain tenements comprising the Carbine Project; and a 75% interest in the West Kundana Joint Venture.
Contractors
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Deposit Type
- Vein / narrow vein
- Breccia pipe / Stockwork
Summary:
The Kundana camp is situated within the Norseman-Wiluna Greenstone Belt, in an area dominated by the Zuleika shear zone, which separates the Coolgardie domain from the Ora Banda domain.
K2-style mineralisation consists of narrow vein deposits hosted by shear zones located along steeply dipping overturned lithological contacts. The K2 structure is present along the contact between a black shale unit (Centenary Shale) and intermediate volcaniclastics (Black Flag Group).
Within the Centenary Main Vein (K2) structure at Millennium/Centenary, grade continuity is affected when the percentage of quartz decreases and only a sheared structure remains. This results in lower grade in areas where only the shear is present and higher grade where quartz is evident. Within Millennium North, the shear increases in width and the mineralisation is present as stockwork veins within the shear. Overall metal content is broadly preserved but is diluted over a greater width.
The strike length of the Millennium K2 structure is approximately 875m. The strike length of the Centenary K2 structure is approximately 600m. The individual ore bodies occur in a major regional Zuleika shear system extending over tens of kilometres.
Millennium K2 structure is 1.2m wide on average and can be up to 8m at Millennium North, while Centenary K2 is averages 0.6m wide and can be up to 3m wide.
Both have a minimum width of ~ 0.1m. Mineralisation is known to occu ........
Summary:
At underground mine, Kundana mining methodology is Narrow Vein Long Hole Open Stoping.
Underground is accessed via two portals from two pits (South Pit & Moonbeam Pit). Link drives underground connect all the ore bodies to allow multiple Ingress/Egress points. Decline dimensions 5.0mW x 5.4mH. Deepest current working level is approximately 602m below sea level.
Flow Sheet:
Three stage crushing:
- Primary Metso C140 Jaw crusher (220kW) -1250 x 940mm throat- feed size 800mm, product size p80-120mm;
- Secondary(1) and tertiary(1) crushers: Metso HP 4 (315kW) Product size 17mm;
- Product Screen: Joest inclined vibrating screen 2.44 x 7.6m;
- 4 x conveyor belts, Belt and static magnets as well as a rock breaker for the primary crusher.
Grinding:
- Ball Mill with 4,500kW installed power, Mill size 5.5m(dia) x 8.74m(l), Polymet composite liners, Classification Weir Cavex 250mm (x11) Grind size p80 – 106 µm.
Flow Sheet:
Summary:
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Reserves at December 31, 2021:
The Ore Reserve Estimate has been reported at a 4.08gpt cut-off.
| Category | Tonnage | Commodity | Grade | Contained Metal |
|
Proven
|
0.15 Mt
|
Gold
|
5.39 g/t
|
26 koz
|
|
Probable
|
1.19 Mt
|
Gold
|
4.26 g/t
|
163 koz
|
|
Proven & Probable
|
1.34 Mt
|
Gold
|
4.39 g/t
|
189 koz
|
Corporate Filings & Presentations:
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