Overview
| Stage | Production |
| Mine Type | Underground |
| Commodities |
|
| Mining Method |
- Open stoping
- Paste backfill
|
| 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. 4
The East Kundana Joint Venture is between Rand Mining Limited(12.25%), Tribune Resources Limited(36.75%) and Gilt-Edged Mining Pty Limited(51%). On 18 August 2021, Gilt-Edged Mining became a wholly-owned subsidiary of Evolution Mining Limited.
Contractors
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Summary:
The Kundana camp is situated within the NorsemanWiluna Greenstone Belt, in an area dominated by the Zuleika Shear Zone, which separates the Coolgardie domain from the Ora Banda domain. The Zuleika Shear Zone in the Kundana area comprises multiple anastomosing shears the most important of which are the K2, the K2A and Strzelecki Shears.
Raleigh mineralisation is hosted on the Strzelecki Structure. Strzelecki mineralisation consists of very narrow, very highgrade mineralisation on a laminated vein hosted in the camp-scale Strzelecki Shear which abuts a differentiated mafic intrusive, the Powder Sill Gabbro against intermediate volcanoclastic rocks (Black Flag Group). A thin ‘skin’ of volcanogenic lithic siltstone-sandstone lies between the gabbro and the Strzelecki shear. Being bound by an intrusive contact on one side and a sheared contact on the other, the thickness of the sedimentary package is highly variable from absent to about forty metres true width.
The Hornet-Rubicon-Pegasus mineralisation consists primarily of high-grade laminated vein hosted gold on the K2 plane of the Zuleika shear with additional mineralisation on associated lower order structures. The Falcon target is a related mineralised zone in the hangingwall to Pegasus and between the two main Zuleika structures, the K2 and Strzelecki structures.
Mining Methods
- Open stoping
- Paste backfill
Summary:
At underground mine, East Kundana mining methodology is Open stoping with pastefill.
5m x 5.5m declines from portals in two pits to five declines which access the Rubicon, Hornet, and Pegasus orebodies at RHP and Raleigh and Sadler orebodies at Raleigh. Deepest current level is approximately 738 metres below the surface (Raleigh).
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:
| Category | Tonnage | Commodity | Grade | Contained Metal |
|
Proven
|
1,222 kt
|
Gold
|
4.9 g/t
|
193 koz
|
|
Probable
|
2,343 kt
|
Gold
|
4.8 g/t
|
359 koz
|
|
Proven & Probable
|
3,565 kt
|
Gold
|
4.8 g/t
|
552 koz
|
|
Measured
|
1,695 kt
|
Gold
|
6.6 g/t
|
362 koz
|
|
Indicated
|
4,868 kt
|
Gold
|
5.6 g/t
|
873 koz
|
|
Inferred
|
2,321 kt
|
Gold
|
4.5 g/t
|
337 koz
|
|
Total Resource
|
8,884 kt
|
Gold
|
5.5 g/t
|
1,572 koz
|
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