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Australia
Darlot Mine (King of the Hills (KOTH) Operation)

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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
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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 Life2025
Since FY2023, Darlot underground mine is part of the King of the Hills (KOTH) Operations.

In July 2022, the Darlot process plant and Great Western open pit mine (satelite of Darlot underground mine) were placed into care and maintenance.

Following the completion of King of the Hills processing plant, Darlot has transitioned from a central processing facility to become a satellite underground mine to King of the Hills.

Deliveries of ore from the Darlot satellite underground mine to King of the Hills process plant began in August 2022.
Latest NewsRed 5’s Darlot mine shines     November 14, 2023


Owners

Source: p. 4
CompanyInterestOwnership
Darlot Mining Company (Pty) Ltd. (operator) 100 % Direct
Red 5 Ltd. 100 % Indirect
The mine is operated through Red 5’s 100%-owned subsidiary company, Darlot Mining Company Pty Ltd.

Contractors

Subscription required - Subscription is required.


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 an economic cut-off.

Mining dilution of 10 to 20% has been used.

Mining recovery factor of 90 to 95% is applied.

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 reserve.

Great Western open pit
At the end of FY-22, the Great Western open pit had progressed to within two benches of its final design depth and ........


Crushing and Grinding
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Processing

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Summary:

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Production:
The Darlot processing plant continued to operate at full capacity throughout April 2022. 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) Operation
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Operational Metrics:

Metrics202320222021202020192018
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required574.98 kt497 kt
Annual processing capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required0.83 Mt0.83 Mt0.83 Mt
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required943.86 kt
Waste  ......  Subscription required  ......  Subscription required  ......  Subscription required
Total tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required
Tonnes processed  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Reserves at June 30, 2023:
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 51 kt Gold 2.4 g/t 4 koz
Probable 1,341 kt Gold 2.6 g/t 110 koz
Proven & Probable 1,393 kt Gold 2.5 g/t 114 koz
Measured 159 kt Gold 1.6 g/t 8 koz
Indicated 8,120 kt Gold 3.9 g/t 1,017 koz
Inferred 8,288 kt Gold 2.8 g/t 754 koz
Total Resource 16,567 kt Gold 3.3 g/t 1,779 koz

Commodity Production Costs:

CommodityUnits20172016
All-in sustaining costs (sold) Gold USD 1,432 / oz†   1,238 / oz†  
All-in costs Gold USD 1,432 / oz†   1,238 / 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
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Water Supply
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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 Nov 17, 2023
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Nov 17, 2023
....................... Subscription required ....................... Subscription required Subscription required Nov 17, 2023
....................... Subscription required ....................... Subscription required Subscription required Nov 17, 2023
....................... Subscription required ....................... Subscription required Subscription required Nov 17, 2023
Subscription required - Subscription is required.

Staff:

EmployeesTotal WorkforceYear
Subscription required 2023
Subscription required 2021
Subscription required 2020
Subscription required 2019
Subscription required 2018
Subscription required 2017

Corporate Filings & Presentations:

DocumentYear
Annual Report 2023
Sustainability Report 2023
Year-end Mineral Reserves 2023
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 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
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News:

NewsDate
Red 5’s Darlot mine shines November 14, 2023

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