Australia

DeGrussa Operation

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Categories

Overview

Mine TypeUnderground
StatusCare and Maintenance
Commodities
  • Copper
  • Gold
  • Silver
Mining Method
  • Longhole open stoping
  • Longitudinal stoping
  • Transverse open stoping
  • Sub-level open stoping (SLOS)
  • Cut & Fill
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SnapshotThe DeGrussa Operations includes both the DeGrussa and Monty Copper-Gold Mines.

Underground mining operations at DeGrussa have been completed, with the depletion of run-of-mine (ROM) sulphide ore from the DeGrussa and Monty Copper-Gold Mines. The final stopes were extracted, hauled to surface and processed in October 2022.

With the completion of underground mining activities, our DeGrussa operations transitioned to process mineralised waste and oxide stockpiles for the period November 2022 to May 2023.

Following the completion of oxide processing in May 2023, the DeGrussa site transitioned to care and maintenance and all alternatives are being considered for the operation, including closure and rehabilitation, and divestment.
Related Asset

Owners

SourceSource
CompanyInterestOwnership
Sandfire Resources Ltd. 100 % Indirect
DeGrussa Copper Operations is 100% owned by Sandfire Resources.

Deposit type

  • VMS

Summary:

The DeGrussa Operations includes both the DeGrussa and Monty Copper-Gold Mines.

DeGrussa
The DeGrussa Mine lies within the Proterozoic-aged Bryah rift basin that is enclosed between the Archaean Marymia Inlier to the north and the Proterozoic Yerrida basin to the south. The principal exploration targets in the Doolgunna Project area are Volcanogenic Hosted Massive Sulphide (VHMS) deposits located within the Proterozoic Bryah Basin of Western Australia. The style of mineralisation is considered to be from VHMS mineralisation.

The DeGrussa sulphide lode generally strikes towards NE with a strike length of approximately 230m, very steeply dipping towards the south with a plunge generally trending SW and having a vertical extent of about 180m.

The Conductor 1 orebody lies north of DeGrussa and generally strikes ENE dipping approximately 65° to the SE with a high-grade plunge trending SW. It has a strike length of about 540m with a vertical extent of 420m.

Conductor 4 orebody lies to the east of DeGrussa and Conductor1 and are stratigraphically deeper. They have an overall strike length of 470m and vertical extent of 260m. The upper sulphide lode strikes towards ENE with an approximate dip of 47° to the SE and high-grade plunge trending SE. The lower sulphide lode strikes E, dipping approximately 45° to the S with a SW high grade plunge.

Conductor 5 orebody is east of Conductor 4 and has a strike length up to 380m and a vertical extent of 470m. The sulphide lode strikes ESE with an approximate dip of 45° to the SSW and high-grade plunge trending SE.

Monty
The Monty Mine lies within the Proterozoic-aged Bryah rift basin that is enclosed between the Archaean Marymia Inlier to the north and the Proterozoic Yerrida basin to the south. The principal exploration targets in the Springfield Project area are Volcanogenic Hosted Massive Sulphide (VHMS) deposits located within the Proterozoic Bryah Basin of Western Australia. The style of mineralisation is considered to be from VHMS mineralisation.

The Monty massive sulphide mineralisation generally strikes east and steeply dips to the northwest between 75-85°.

Reserves

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Mining Methods

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Comminution

Crushers and Mills

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Processing

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Production

CommodityProductUnits20232022202120202019201820172016
Copper Payable metal t  ....  Subscribe  ....  Subscribe
Copper Metal in concentrate t  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe69,39464,91867,08868,202
Copper Concentrate kt  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe287268275278
Gold Payable metal oz  ....  Subscribe  ....  Subscribe
Gold Metal in concentrate oz  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe44,45539,27338,62337,612
Silver Payable metal koz  ....  Subscribe  ....  Subscribe
Silver Metal in concentrate koz  ....  Subscribe  ....  Subscribe

Operational metrics

Metrics20232022202120202019201820172016
Annual processing capacity  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe1.6 Mt1.6 Mt
Ore tonnes mined  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe1,624,988 t1,665,860 t1,530,301 t1,593,168 t
Tonnes milled  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe1,619,714 t1,641,244 t1,623,952 t1,572,862 t

Production Costs

CommodityUnits2023202220212020201920182017
Credits (by-product) Copper USD  ....  Subscribe  ....  Subscribe  ....  Subscribe
C1 cash costs Copper USD  ....  Subscribe  ....  Subscribe  ....  Subscribe
C1 cash costs Copper USD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 0.83 / lb **   0.93 / lb **   0.93 / lb **  
** Net of By-Product.

Financials

Units2023202220212020201920182017
Capital expenditures M USD  ....  Subscribe
Revenue M  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 592.2  AUD 596.2  AUD 513.2  AUD
After-tax Income M  ....  Subscribe  ....  Subscribe
EBIT M  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 225.7  AUD 226.3  AUD 158.5  AUD
EBITDA M  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 365.4  AUD
Operating Cash Flow M  ....  Subscribe

Heavy Mobile Equipment

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AV - Autonomous

Personnel

Mine Management

Job TitleNamePhoneEmailProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Nov 21, 2023
....................... Subscription required ....................... Subscription required ........... Subscription required ........... Subscription required Subscription required Nov 21, 2023
....................... Subscription required ....................... Subscription required Subscription required Nov 21, 2023

EmployeesContractorsTotal WorkforceYear
...... Subscription required ...... Subscription required ...... Subscription required 2023
...... Subscription required ...... Subscription required ...... Subscription required 2022
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Aerial view:

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