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Australia
Darlot Mine

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 Location:
57 km E from Lienster, Western Australia, Australia

  Address:
Level 2 35 Ventnor Avenue
West Perth
Western Australia, Australia
6005
Phone  ...  Subscription required
Fax(61-8) 9481 5950
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
Mining Method
  • Longhole stoping
  • Cemented backfill
  • Paste backfill
Production Start...
Mine Life5 years (as of Jan 1, 2020)
Great Western (open pit) is satellite mine of Darlot (underground mine).

The Great Western mine was placed care and maintenance while the Darlot underground potential is assessed. In July 2022, the Darlot process plant was placed into care and maintenance, with the Darlot underground mine transitioning to a satellite mine to King of the Hills. Deliveries of ore from the Darlot satellite underground mine to King of the Hills (KOTH) process plant began in August 2022.


Owners

Source: p. 65
CompanyInterestOwnership
Red 5 Ltd. 100 % Indirect
Darlot held by Darlot Mining Company Limited.

Contractors

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Deposit Type

  • Vein / narrow vein
  • Hydrothermal
  • Porphyry


Summary:

The Darlot lodes are considered to be part of an Archean hydrothermal fault-vein deposit with many similar characteristics with other deposits within the Yilgarn Craton, namely host rock type and nature of hydrothermal alteration; however, it is atypical in being relatively flat-lying rather than steeply dipping. Felsic porphyries and lamprophyre intrusions are encountered throughout the deposit. The major host for gold mineralisation is the Mount Pickering Dolerite. Gold mineralisation is associated with quartz veins and alteration haloes controlled by major D2 and D3 structures or secondary splays and cross-linking structures. The quartz veins are hosted mainly by magnetic dolerite and magnetic quartz dolerite rock types and, to a lesser extent, by non-magnetic dolerite and felsic volcano sedimentary rock types. Lamprophyre intrusions are present in the area with a variety of orientations. In most cases the lamprophyres are thought to be pre-mineralisation but are an un-favourable host rock for mineralisation and in most cases are barren. Mineralisation is hosted by a fractionated Dolerite sill within the greater Mt Pickering dolerite syncline, with silica+/-albite+/- carbonate+/-pyrite+/-gold being the key alteration components. St George is part of the Darlot Gold Mine, and the interpretation is based largely on the Centenary style mineralisation that is also in part associated with the Oval and Burswood Faults, with minimal supergene enrichment. St George Mineral Res ........


Mining Methods

  • Longhole stoping
  • Cemented backfill
  • Paste backfill


Summary:

The principal mining method used for the underground operation at Darlot is long-hole stoping with cemented paste fill where required, with only a small proportion of stopes expected to be filled with paste. This is a proven mining method at Darlot that is associated with good productivities and reasonable costs. Ground conditions underground at Darlot are good. Mine designs have had 20% planned external dilution applied.

Selected mining method deemed appropriate based on geotechnical advice and previous experience and history at Darlot.

Assumptions have been based on actual mining performance at Darlot with Geotechnical Assessments undertaken over the years to develop a comprehensive ground support and reinforcement regime for conditions encountered at Darlot.

Stopes have been designed based on revenue from individual Service blocks. Where this has not been completed an economic cut-off of 2.3 g/t was applied.

Mining dilution of 10 to 20% has been used to development & stoping respectively.

Average mining recovery factor of 90% is applied based on mining methods.

Minimum stope widths of 1.5m for Longhole stopes.

Designed stopes with greater than 50% inferred blocks are excluded from the reported reserve.

Darlot is an operating underground mine and as such all the required infrastructure is in place and operational. Minor Capital Development will be required to extract all of the ore rese ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:
The Darlot processing plant continued to operate at full capacity throughout April. The stockpiles of ore from Great Western were then re-directed to the KOTH ROM as commissioning feed stock for the KOTH processing plant. During May and June, Darlot processed ore originating from the Darlot underground only.

CommodityUnits2022202120202019201820172016
Gold koz  ......  Subscription required  ......  Subscription required*  ......  Subscription required*  ......  Subscription required*48*3966
All production numbers are expressed as metal in doré. * Combined production for Darlot Mine and King of the Hills (KOTH) Mine
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Operational Metrics:

Metrics202220212020201920182017
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required497 kt
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required
Annual processing capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required0.83 Mt0.83 Mt0.83 Mt
Total tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required
Waste  ......  Subscription required  ......  Subscription required  ......  Subscription required
Tonnes processed  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Reserves at June 30, 2022:
Underground Darlot cut-off grade for reported reserves is 1.7 - 2.4 g/t Au.

Cut-off grades for reported resources are:
underground Darlot - 2.0 g/t Au;
underground Great Western - 1.5 g/t Au;
open-pit Darlot and Great Western - 0.5 g/t Au.

CategoryTonnage CommodityGradeContained Metal
Proven 49 kt Gold 1.8 g/t 3 koz
Probable 1,256 kt Gold 2.6 g/t 106 koz
Proven & Probable 1,305 kt Gold 2.6 g/t 109 koz
Measured 375 kt Gold 0.8 g/t 10 koz
Indicated 8,099 kt Gold 4 g/t 1,032 koz
Inferred 8,593 kt Gold 2.6 g/t 708 koz
Total Resource 17,067 kt Gold 3.4 g/t 1,840 koz

Commodity Production Costs:

CommodityUnits201720162015
All-in sustaining costs (sold) Gold USD 1,432 / oz†   1,238 / oz†   1,057 / oz†  
All-in costs Gold USD 1,432 / oz†   1,238 / oz†   1,057 / oz†  
† Net of By-Product.

Financials:

Units20222016
Capital expenditures M  ......  Subscription required 21.4  USD
Revenue M 83.1  USD
Operating Income M 11  USD
Gross profit M 25.4  USD
Subscription required - Subscription is required



Heavy Mobile Equipment:
HME TypeModelSizeQuantityLeased or
Contractor
Ref. Date
Drill (long hole) ....................... Subscription required ....................... Subscription required Jul 14, 2014
Jumbo ....................... Subscription required ....................... Subscription required Jul 14, 2014
Loader ....................... Subscription required ....................... Subscription required Jul 14, 2014
Loader ....................... Subscription required ....................... Subscription required Jul 14, 2014
Truck (haul) ....................... Subscription required 50 t ....................... Subscription required Jul 14, 2014
Truck (haul) ....................... Subscription required 60 t ....................... Subscription required Jul 14, 2014
Truck (haul) ....................... Subscription required ....................... Subscription required Leased Dec 31, 2018
Subscription required - Subscription is required.

Mine Management:

Job TitleNamePhoneEmailProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 26, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 26, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 26, 2022
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Dec 23, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 26, 2022
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2021
Subscription required 2020
Subscription required 2019
Subscription required 2018
Subscription required 2017

Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
Press Release 2022
Press Release 2022
Quarterly Report 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Year-end Mineral Reserves 2018
Form 20-F 2017
Project Description 2017
Annual Report 2016
Financial Review 2016
Year-end Mineral Reserves 2016
Financial Review 2015
Year-end Mineral Reserves 2015
Corporate Presentation 2014
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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