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Australia
Stawell Mine

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 Location:
1 km E from Stawell, Victoria, Australia

  Address:
PO Box 265
Stawell
Victoria, Australia
3380
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit & Underground
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
  • Blast Hole Stoping
Production Start...
Mine Life2035
Throughout 2018, underground exploration took place allowing Stawell Gold Mines to shore up future reserves resulting in the transition from care and maintenance towards restarting production in early 2019. This was followed by a period of recommissioning the processing plant and re-starting underground mining operations with the first gold pour taking place in January 2019.


Owners

Source: p. 1
CompanyInterestOwnership
Stawell Gold Mines Pty Ltd. (operator) 100 % Direct
Arete Capital Partners Ltd. 100 % Indirect
In December 2017, private equity group Arete Capital Partners Ltd. acquired a controlling interest in Stawell Gold Mines Pty Ltd.

Contractors

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Deposit Type

  • Orogenic
  • Breccia pipe / Stockwork
  • Vein / narrow vein


Summary:

Sulfide gold mineralization at Stawell is typical of orogenic gold deposits.

Stawell is hosted by quartz-rich turbiditic sedimentary rocks (Albion Formation) that overlap a thick pile of tholeiitic basaltic lavas (Magdala Basalt). It is suggested that the host-rock (Stawell Facies) was originally a turbiditic sedimentary rock that was hydrothermally altered in response to seawater interaction with the hot basaltic pile. Subsequent regional greenschist metamorphism and ductile deformation culminated in the formation of the Magdala mineralized system and produced a complex pattern of hydrothermal alteration.

There are three mineralization styles at Stawell, being Magdala (separated into west and east flanks), Golden Gift and Wonga. The Magdala and Golden Gift ore types are hosted within the Magdala Volcanogenic. Within the Magdala Deposit there are three main ore types; Central Lode, Basalt Contact Lodes, and Magdala Stockwork Lodes. The East Flank mineralization introduces a new ore type: The Hampshire Lode.

Central Lode mineralization was a significant production source from Magdala early in the mine’s history. It is a quartz-rich shear lode ranging from 0.5m to 10m in width and generally dips 55° to 65° to the west with a total strike length of 4km and a down-dip extend of one kilometer. The overall structure is mineralized economic shoots that vary from 20m to 30m in strike up to 200m to 350m in strike. Free gold in the quartz is associated ........


Mining Methods

  • Truck & Shovel / Loader
  • Blast Hole Stoping


Summary:

Stawell Gold Mines (SGM) has operated at its current location since 1983, which has involved the progressive mining of gold in a series of above ground open pits and extensive underground workings. SGM surface operations are situated adjacent to the eastern boundary of the Stawell Township and encompass an approximate area of 380 ha. Stawell Gold Mines (SGM) underground workings extend from the Magdala portal in a north-westerly direction underneath the town, and on the East Flank of the Magdala Basalt, which hosts the Aurora B discovery which is the new area of production.

Underground mining consists of two main aspects: development drives for access and production stopes for mining. Development drives are the tunnels that provide access to the gold bearing ore. Production stopes are voids mined to extract ore for processing. Both aspects of mining require the use of blasting to break or fracture the rock. SGM then excavates the rock or ore from underground using machines, such as loaders and trucks.

Development firings (or tunnelling)
Development blasting is used to construct the underground access drives (tunnels). Blast holes are drilled in a precise pattern in the tunnel’s rock face, filled with explosives and detonated in a controlled manner. This blast fractures a small amount of rock, typically no more than 300 tonnes. This rock is then excavated and generally used to backfill another part of the mine.

About development firings ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Production:

CommodityProductUnits2021202020192016
Gold Equivalent Payable metal oz  ......  Subscription required  ......  Subscription required
Gold Metal in doré oz  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Operational Metrics:

Metrics2021202020192016
Annual processing capacity  ......  Subscription required  ......  Subscription required850,000 t
Tonnes milled  ......  Subscription required  ......  Subscription required518,004 t845,573 t
Annual mining capacity  ......  Subscription required  ......  Subscription required1 kt
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Reserves at December 31, 2016:
Public records for Stawell Gold Mine reserve data for 2017-2019 are not available.

CategoryTonnage CommodityGradeContained Metal
Probable 2,700 kt Gold 1.5 g/t 132 koz
Measured 81 kt Gold 3.7 g/t 10 koz
Indicated 3,620 kt Gold 2 g/t 236 koz
Measured & Indicated 3,700 kt Gold 2.1 g/t 246 koz
Inferred 1,130 kt Gold 2.9 g/t 104 koz

Commodity Production Costs:

CommodityUnits2016
Cash costs (sold) Gold USD 1,973 / oz  
All-in sustaining costs (sold) Gold USD 2,025 / oz  

Financials:

Units2016
Capital expenditures M USD 0.2  
Revenue M USD 3.3  
Operating Income M USD -6.4  
Pre-tax Income M USD -6.5  
After-tax Income M USD -4.6  



Heavy Mobile Equipment:
HME TypeModelQuantityRef. Date
Drill ....................... Subscription required ....................... Subscription required Jun 15, 2022
Loader ....................... Subscription required Jan 21, 2019
Loader ....................... Subscription required Jan 21, 2019
Truck (underground) ....................... Subscription required Jan 21, 2019
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Mine Management:

Job TitleNameEmailProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 27, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 27, 2022
....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Sep 27, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 27, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 27, 2022
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2021
Subscription required 2020
Subscription required 2019

Corporate Filings & Presentations:

DocumentYear
Other 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Corporate Presentation 2017
Management Discussion & Analysis 2017
Corporate Presentation 2016
Financial Review 2016
Management Discussion & Analysis 2016
Technical Report 2016
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Subscription required - Subscription is required.

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