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Australia
Karlawinda Mine

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 Location:
58 km SE from Newman, Western Australia, Australia

  Regional Office:
Level 1, 28 Ord Street
West Perth
Western Australia, Australia
6005
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Fax+61-8-9212-4699
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Processing
  • Smelting
  • Gravity separation
  • Agitated tank (VAT) leaching
  • Concentrate leach
  • Carbon in leach (CIL)
  • Elution
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)
Mine Life8.5 years (as of Jan 1, 2018)
July 1, 2021 - The board of Capricorn Metals Ltd is pleased to advise that it poured first gold yesterday at its wholly owned Karlawinda Gold Project.
Latest NewsCapricorn Metals Ltd: Karlawinda Gold Project first gold pour.     July 1, 2021


Owners

Source: p. 4,18,19
CompanyInterestOwnership
Capricorn Metals Ltd. 100 % Indirect
The Karlawinda Project is located in the Pilbara region of Western Australia on tenements M52/1070, E52/1711, E52/2247, E52/2398, E52/2409, E52/3323, E52/3363, E52/3364, E52/3450 held by Greenmount Resources Pty Ltd, a wholly owned subsidiary of Capricorn Metals.

Deposit Type

  • Metamorphic hosted


Summary:

The Bibra deposit is part of a large-scale Archaean aged gold mineralised system. Most of the mineralisation at Bibra is hosted within a package of deformed meta-sediments and is developed along two parallel, shallow dipping structures; the Main Footwall Lode and the Main Hanging Wall Lode. Recent exploration has also identified another potentially significant zone of mineralisation known as the Portrush Trend further into the hanging wall of the system. Laterite mineralisation has developed over the structures close to surface. The deposit is oxidised to average depths of between 50-70 m.


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Bibra deposit will be mined by open pit mining methods using conventional mining equipment. The FS assumes that load and haul will be undertaken as an owner operator which utilises a peak operating fleet of four 100 tonne haul trucks and eight 130 tonne haul trucks, a 300 tonne, 200 tonne and 100 tonne excavators along with ancillary equipment including dozers, graders, loaders and watercarts. Drill and blast activities and grade control drilling will be undertaken on a contract basis. Detailed fragmentation modelling was undertaken by George Boucher Consulting to determine appropriate blasting techniques and powder factors in the various ore and rock types. Drill and blast will be on 5m benches in ore and 5m and 10m benches in waste. Grade control drilling will be undertaken by reverse circulation drilling, predominantly on a spacing of 10m x 10m, which targets the main zones of mineralisation and a 5m x 8m pattern in more discrete hanging wall lodes. Grade control hole orientation in the first 20 metres of the pit (including laterite zones) will be vertical and thereafter is planned with inclined holes at 60 degrees to the east.

The pit will be mined in three stages with the first stage comprised of three oxide pits.

A life of mine open pit production schedule was prepared using the staged designs and based on the primary target of achieving the mill production feed rate which varied between 3.0 Mtpa and 3.75 Mtpa. This was achieved throughout the mine life without exceeding any practical physical mining limits. Pit production is planned to commence one quarter prior to the treatment of ore to provide waste material for infrastructure requirements and to ensure that mill feed material is available for commissioning.

Pit production is planned to peak at around 7 Mt per quarter and this rate is maintained for just over one year before dropping to a consistent rate of approximately 4.5 Mt per quarter for almost 3 years. The production profile then follows a natural downward trend with mining sourced only from the Stage 3 pit as the mine plan approaches completion.

The selected mining method, design and extraction sequence are tailored to suit orebody characteristics, minimise dilution and ore loss, defer waste movement, minimise rates of vertical mining advance, utilise planned process plant capacity and expedite net cash flow in a safe manner. The open pit has been scheduled based on realistic mining productivity with readily achievable mining rates along with consistent material movements.

The schedule also smoothed material movement profile across periods to ensure uniformity in fleet mobilisation across years while also avoiding ore stockpile build-ups over extended periods. A major scheduling constraint applied to this schedule was a limit on the vertical rate of advance. It was required that no pit or stage would have a vertical advance of more than 60 metres annually. This constraint was based on Cube Consulting’ experience in similar mining operations.

Planned pit walls at Bibra will be mined through, para-amphibolite, amphibolites, mafic schist, tuff sandstone and tuff siltstone rocks and their weathered equivalents. Maximum final pit wall heights of up to 215 m will be limited to the north-west corner of the pit. Other wall sectors range in height from approximately 50 m to 150 m.


Crushing and Grinding
Flow Sheet: Source
Crusher / Mill TypeModelSizePowerQuantity
Ball mill 7.5 MW 1


Processing

  • Smelting
  • Gravity separation
  • Agitated tank (VAT) leaching
  • Concentrate leach
  • Carbon in leach (CIL)
  • Elution
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)

Flow Sheet: Subscription required

Summary:

The Karlawinda process plant is designed to treat 3.0 Mtpa of primary ore, producing an average of 100 000oz of gold per annum from the Bibra deposit. During the treatment of the laterite and oxide material, expected during the initial two years of operations, the process plant is designed to treat 3.75 Mtpa and therefore some plant components have been up-sized to achieve this higher throughput. The plant design comprises:

• Crushing Circuit
• Crushed Ore Stockpile
• Grinding and Classification
• Gravity Recovery
• Leaching and Adsorption
• Elution and Electrowinning
• Smelting.

CommodityParameter

Production:

CommodityUnitsAvg. Annual (Projected)LOM (Projected)
Gold oz 96,872823,413
All production numbers are expressed as metal in doré.


Reserves at May 29, 2018:

CategoryTonnage CommodityGradeContained Metal
Proven 9,611 kt Gold 1.1 g/t 337 koz
Probable 17,942 kt Gold 1 g/t 555 koz
Proven & Probable 27,553 kt Gold 1 g/t 892 koz
Measured 10,640 kt Gold 1.1 g/t 365 koz
Indicated 34,160 kt Gold 0.9 g/t 1,010 koz
Measured & Indicated 44,800 kt Gold 1 g/t 1,375 koz
Inferred 6,160 kt Gold 0.7 g/t 150 koz
Total Resource 50,960 kt Gold 0.9 g/t 1,525 koz


Heavy Mobile Equipment:
HME TypeModelSizeQuantityStatusRef. Date
Excavator 100 t ....................... Subscription required Proposed Oct 23, 2017
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Oct 23, 2017
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Oct 23, 2017
Truck (haul) ....................... Subscription required 181 t Existing Feb 21, 2022
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Oct 23, 2017
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Oct 23, 2017
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Oct 6, 2021
....................... Subscription required ....................... Subscription required Subscription required Oct 6, 2021
....................... Subscription required ....................... Subscription required Subscription required Oct 6, 2021
Subscription required - Subscription is required.

Staff:

EmployeesContractorsYear
Subscription required Subscription required 2017

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
Annual Report 2018
Corporate Presentation 2018
Other 2018
Press Release 2018
Press Release 2018
Press Release 2018
Feasibility Study Report 2017
Subscription required - Subscription is required.

News:

NewsDate
Capricorn Metals Ltd: Karlawinda Gold Project first gold pour. July 1, 2021
Elemental Royalties Notes Start of Ore Processing at Key Karlawinda Royalty and Progress at Panton Royalty June 25, 2021
Elemental Royalties Notes Commissioning of Cornerstone Karlawinda Mine June 3, 2021
Capricorn edges closer to Karlawinda production November 19, 2020
Capricorn awards $410m Karlawinda contract to MACA August 27, 2020
Capricorn targets first gold production by June 2021 July 27, 2020
Capricorn’s Karlawinda emerges as ‘standout greenfield’ April 17, 2020
SMS Mining Services builds billion dollar order book with WA contracts October 3, 2018

Aerial view:

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