Overview
Stage | Production |
Mine Type | Underground |
Commodities |
|
Mining Method |
|
Production Start | ... |
The acquisition of Kundana assets, by Evolution Mining, elevates Mungari to a cornerstone asset and consolidates regional resources. In 2023, whilst mining ceased in Frog's Leg, continued activity at Kundana and EKJV contributed to underground mine development.
Following the integration of Kundana assets, and ongoing growth projects, the Mungari Gold Operation has established Kurrajong Village. It is the new home-away-from-home in Coolgardie for some of our new employees and contractors. |
Source:
p. 13
Evolution operates wholly-owned mine Mungari in Western Australia.
Contractors
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Deposit Type
- Vein / narrow vein
- Breccia pipe / Stockwork
- Orogenic
Summary:
The Mungari Operation lies within the Kalgoorlie Terrane of the Wiluna-Norseman Greenstone Belt, part of the greater Archaean Yilgarn Craton of Western Australia. The region has been extensively studied, the host rocks date to 2.7 billion years with the main episode of deformation, granitoid intrusion, metamorphism, and gold mineralisation between 2.66 to 2.64 billion years. The structural framework can be summarised by 5 major events (gold mineralisation associated with D3 & D4):
D1e - Early extension – Syn-volcanic emplacement if komatiite and basalt sequences
D1 - Broad upright folding and north-south directed thrusting
D2 - ENE – WSW shortening resulting in significant regional folding
D3 - Activation north-northwest trending shear zones (including the Zuleika Shear).
D4 - North-northeast brittle faults, offsetting the stratigraphic sequence and mineralisation.
The Kalgoorlie Terrane comprises five major stratigraphic successions; (from oldest to youngest) lower basalt, komatiite, upper basalt, felsic volcanic and sedimentary, and a polymictic conglomerate. The terrane is highly folded and disrupted by faults and major shear zones; the rocks are metamorphosed to greenschist facies with local areas metamorphosed to amphibolite facies, associated with deformation and granitoid intrusion.
The Zuleika Shear Zone, Kunanalling Shear Zone and Carbine Thrust Zone are the dominant corridors of mineralisation at Mungari.
Summary:
Kundana (underground mining)
- Mining method/s: Narrow vein long hole open stoping.
- Access: 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.
- Workforce: Owner operator.
Flow Sheet:
Source:
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, 2022:
The Ore Reserve Estimate has been reported at a 2.80 gpt cut-off.
Category | Tonnage | Commodity | Grade | Contained Metal |
Proven
|
0.1 Mt
|
Gold
|
5.01 g/t
|
9 koz
|
Probable
|
2 Mt
|
Gold
|
4.16 g/t
|
263 koz
|
Proven & Probable
|
2 Mt
|
Gold
|
4.18 g/t
|
273 koz
|
Corporate Filings & Presentations:
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