Overview
| Stage | Production |
| Mine Type | Open Pit & Underground |
| Commodities |
|
| Mining Method |
- Truck & Shovel / Loader
- Blast Hole Stoping
|
| Production Start | ...  |
| Mine Life | 2035 |
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. |
Source:
p. 1
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 ........
Source:
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Flow Sheet:
Summary:
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Reserves at December 31, 2016:
Public records for Stawell Gold Mine reserve data for 2017-2019 are not available.
| Category | Tonnage | Commodity | Grade | Contained 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:
| | Commodity | Units | 2016 |
|
Cash costs (sold)
|
Gold
|
USD
|
1,973 / oz
|
|
All-in sustaining costs (sold)
|
Gold
|
USD
|
2,025 / oz
|
Financials:
| | Units | 2016 |
|
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
|
| HME Type | Model | Quantity | Ref. Date |
|
Drill
|
.......................
|
.......................
|
Jun 15, 2022
|
|
Loader
|
.......................
|
|
Jan 21, 2019
|
|
Loader
|
.......................
|
|
Jan 21, 2019
|
|
Truck (underground)
|
.......................
|
|
Jan 21, 2019
|
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Corporate Filings & Presentations:
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