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Australia
Dalgaranga Mine

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 Location:
62 km NW from Mt Magnet, Western Australia, Australia

  Address:
Level 1, 41-47 Colin Street.
PO Box 1449
West Perth
Western Australia, Australia
6005
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Fax+61-8-9481-0411
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StatusCare and Maintenance
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life7 years (as of Jan 1, 2020)
In response to this rapidly changing situation, the Board has initiated a review of the Gascoyne Company’s operating strategy and will implement the following steps with immediate effect:
• Open pit mining and ore processing operations at Dalgaranga will be suspended immediately.
• The 2.5Mtpa Dalgaranga mill will be transitioned to operating on a care and maintenance basis over the next 2-3 weeks and maintained in a state ready for a rapid resumption of production.
• The majority of the workforce currently at Dalgaranga will be demobilised over the next 1-2 days.

Discussions have commenced with the Company’s contractors and creditors to allow the Company to restructure its financial position to enable Dalgaranga to remain on care and maintenance in the medium term.


Owners

Source: p. 17
CompanyInterestOwnership
Gascoyne Resources Ltd. 100 % Indirect
Dalgaranga's mining lease (ML59/749) is 100% owned by the Gascoyne Resources.

Contractors

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Deposit Type

  • Vein / narrow vein
  • Porphyry


Summary:

Regionally, the Dalgaranga project lies in the Archean aged Dalgaranga Greenstone Belt in the Murchison Province of Western Australia.

At the Gilbey’s deposit, most gold mineralisation is associated with shears situated within biotite-sericite-carbonate pyrite altered schists with quartz-carbonate veining within a porphyry-shale-mafic (dolerite, gabbro, basalt) rock package (Gilbey’s Main Porphyry Zone and Sly Fox). The Gilbey’s Main Porphyry Zone trends north – south and dips moderately-to-steeply to the west on local grid while Sly Fox trends east – west and dips steeply to the north. These two trends define the orientation of the limbs of an anticlinal structure, with a highly disrupted area being evident in the hinge zone.

At the Sly Fox deposit gold mineralisation occurs in quartz veined and silica, pyrite, biotite altered schists.

The Plymouth deposit lies between Gilbey’s and Sly Fox within the hinge zone of anticlinal structure – mineralisation at Plymouth is related to quartz veins and silica, pyrite, biotite altered schists.

At Hendricks and Vickers gold mineralisation occurs in quartz-pyrite veined and altered zones hosted in basalts.

The Never Never deposit at Gilbey’s North appears to be an intersection between a significant mineralised structure and the mine sequence – the lode plunges moderately to the west and is characterised by strong quartz – sericite – fucite alteration, with fine to very fine pyrite ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The mining method adopted at Dalgaranga is open pit mining, using conventional truck and excavator mining. The ore is near surface and is generally described as medium grade.

Mining consists of drill and blast, load and haul with 5m to 10m flitches and 20m batters between benches. Mining is carried out by an experienced mining contractor.

The development of the Gilbey’s pit wall included 3 stages of cut-back, with stage 3 being the final (ultimate) pit. The proposed ultimate pit measures approximately 1,560 metres in length by 680 metres wide, extending vertically to a level of 130 metres reduced level (“RL”), and a maximum depth of approximately 290 metres below surface. The east wall of the proposed pit design contains the majority of final ramp access. The proposed development of the Golden Wings pit measures approximately 500 metres in length by 300 metres wide, extending vertically to a level of 300 metres RL, and a maximum depth of approximately 140 metres below surface.

Open pit mining is currently underway at Dalgaranga Gilbey’s Complex Deposits. The existing LOM plan calls for the continuation of open pit mining to access and extract the remaining portion of the more continuous Gilbey’s Main Porphyry Zone contained in the current cut-back and to advance the Plymouth pit to completion.

Mining consists of drill and blast, then load and haul with conventional excavator and dump truck using 5m to 10m flitches and 20m batters b ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:

CommodityUnits20222021202020192018
Gold oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required4,093
All production numbers are expressed as metal in doré.
Subscription required - Subscription is required.

Operational Metrics:

Metrics20222021202020192018
Total tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required19 Mbcm4.07 Mbcm
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required2,348 kt396 kt
Waste  ......  Subscription required  ......  Subscription required  ......  Subscription required17.8 Mbcm3.75 Mbcm
Tonnes processed  ......  Subscription required  ......  Subscription required  ......  Subscription required2,655 kt245 kt
Annual processing capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required2.5 Mt
Subscription required - Subscription is required.

Reserves at September 8, 2022:
Mineral Resource statement for in-situ and surface stockpile resources above 0.5g/t Au.

Ore Reserve statement for in-situ and surface stockpile resources above 0.5g/t Au.

CategoryTonnage CommodityGradeContained Metal
Proven 0.12 Mt Gold 1.1 g/t 4.2 koz
Probable 1.92 Mt Gold 1.1 g/t 67.9 koz
Proven & Probable 2.04 Mt Gold 1.1 g/t 72.1 koz
Measured 0.59 Mt Gold 0.93 g/t 17.6 koz
Indicated 10.88 Mt Gold 1.17 g/t 408.8 koz
Inferred 3.46 Mt Gold 1.47 g/t 163.6 koz
Total Resource 14.93 Mt Gold 1.23 g/t 590.1 koz

Commodity Production Costs:

Commodity2022202120202019
Site cash costs (produced) Gold  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All-in sustaining costs (AISC) Gold  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All-in costs Gold  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Financials:

Units20222021202020192018
Revenue M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 2.8  
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Heavy Mobile Equipment as of October 27, 2020:
HME TypeModelLeased or
Contractor
Backhoe ....................... Subscription required Leased
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Nov 15, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 15, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 15, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 15, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 15, 2022
Subscription required - Subscription is required.

Staff:

ContractorsYear
Subscription required 2021

Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
Press Release 2022
Year-end Mineral Reserves 2022
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Technical Report 2016
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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