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Australia
Frog’s Leg Mine (Mungari Operation)

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 Location:
18 km W from Kalgoorlie, Western Australia, Australia

  Address:
Kundana Road PO Box 10398
Kalgoorlie
Western Australia, Australia
6430
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
  • Silver
Mining Method
  • Open stoping
  • Paste backfill
Production Start...


Owners

Source: p. 9
CompanyInterestOwnership
Evolution Mining Ltd. 100 % Indirect
Evolution Mining Mungari Pty Ltd. (operator) 100 % Direct
Evolution operates wholly-owned mine Mungari in Western Australia.

Evolution Mining Ltd (EVO) operates the Mungari Gold Operations (MGO) including the Frog’s Leg and White Foil gold projects.

Evolution Mining (Mungari) Pty Ltd is a wholly owned subsidiary of Evolution Mining Limited.

Contractors

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Deposit Type

  • Breccia pipe / Stockwork


Summary:

Mineralisation at Frog’s Leg is hosted within a number of steeply dipping NNW-SSE structures that are vertical or dipping steeply (~80 degrees) to the west. Surface and underground drilling intersect the mineralisation at an angle to minimise bias.

The Frog’s Leg deposit is located in the southern portion of the Kundana mining area, within the Achaean Norseman-Wiluna greenstone belt of the Eastern Goldfields Province. The Kundana gold deposits are structurally related to the Zuleika Shear Zone, a regional NNW-trending shear zone that juxtaposes the Ora Banda domain to the east and the Coolgardie domain to the west. The Frog’s Leg deposit is located on the sheared contact between the porphyritic “cat rock” (regionally known as the Victorious Basalt) and volcaniclastic rocks of Black Flag Beds.

The ore lodes are between 2m and 20m thick and occur as sub-parallel lodes.


Mining Methods

  • Open stoping
  • Paste backfill


Summary:

At underground mine, Frog’s Leg mining methodology is Open stoping, with pastefill.

Access:
- 5m x 5.5m decline from portal in pit, then twin declines from 125 metres below surface (mbs) to access north (Mist) and south (Rocket) sections. Deepest current level is 700mbs.


Crushing and Grinding
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.

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. Gravity & CIP


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:

CommodityUnits202020192018
Gold koz  ......  Subscription required  ......  Subscription required105
All production numbers are expressed as metal in ore.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202120202019201820172016
Ore tonnes mined  ......  Subscription required  ......  Subscription required391 kt462 kt693 kt563 kt
Subscription required - Subscription is required.

Reserves at December 31, 2021:
The Underground Ore Reserve reported at a cut-off of 2.9 g/t.

CategoryTonnage CommodityGradeContained Metal
Proven 0.07 Mt Gold 3.62 g/t 8 koz
Probable 0.33 Mt Gold 3 g/t 31 koz
Proven & Probable 0.4 Mt Gold 3.11 g/t 40 koz

Financials:

Units20202019
Capital expenditures M AUD  ......  Subscription required  ......  Subscription required



Heavy Mobile Equipment as of June 30, 2022:
HME TypeModelQuantity
Drill (long hole) ....................... Subscription required ....................... Subscription required
Drill (long hole) ....................... Subscription required ....................... Subscription required
Drill jumbo (two boom) ....................... Subscription required ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required
Truck (haul) ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Dec 26, 2022
....................... Subscription required ....................... Subscription required Subscription required Dec 26, 2022
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
Fact Sheet 2022
Year-end Mineral Reserves 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Fact Sheet 2018
Year-end Mineral Reserves 2018
Annual Report 2017
Fact Sheet 2017
Quarterly Report 2017
Annual Report 2016
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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