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Australia
Broken Hill (Thackaringa) Project

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 Location:
23 km W from Broken Hill, New South Wales, Australia

  Project Contacts:
Suite 17.03, 100 Miller Street, North Sydney
Sydney
New South Wales, Australia
2060
Phone  ...  Subscription required
EmailEmail
WebsiteWeb
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Overview

StagePermitting
Mine TypeOpen Pit
Commodities
  • Cobalt
  • Sulphur
  • Nickel
Mining Method
  • Truck & Shovel / Loader
Mine Life17 years (as of Jan 1, 2020)
The operation is large-scale and will be one of the largest cobalt producers in the world. In fact, if Broken Hill were a country, it would rank number 5 for cobalt production.


Owners

Source: p. 4
CompanyInterestOwnership
Cobalt Blue Holdings Ltd. (operator) 100 % Direct
Cobalt Blue Holdings Ltd. is pleased to now have 100% of the Broken Hill (Thackaringa) Cobalt Project.

Contractors

Subscription required - Subscription is required.


Deposit Type

  • Metamorphic hosted


Summary:

The BHCP is located in a deformed and metamorphosed Proterozoic supracrustal succession named the Willyama Supergroup, which is exposed as several inliers in western New South Wales, including the Broken Hill Block (Willis, et al., 1982).

The project area covers portions of the Broken Hill and Thackaringa group successions which host the majority of mineralisation in the region, including the Broken Hill base metal deposit. The Sundown Group suite is also present. The extensive sequence of quartz-albite-plagioclase rock that hosts the cobaltiferous pyrite mineralisation is interpreted as belonging to the Himalaya Formation, which is stratigraphically at the top of the Thackaringa Group.

Exploration by COB has been focused on the discovery and definition of cobaltiferous pyrite deposits.

Mineralisation Style
The BHCP mineral deposits (Pyrite Hill, Big Hill and Railway) are characterised by large tonnage cobaltiferous pyrite mineralization hosted within siliceous albitic gneisses and schists of the Himalaya Formation.

Cobalt mineralisation exists within extensive pyritic horizons where cobalt is present within the pyrite lattice. Mineralogical studies have indicated the majority of cobalt (~85%) is found in solid solution with primary pyrite (Henley 1998).

A strong correlation between pyrite content and cobalt grade is observed.

The Thackaringa mineralisation comprises stratabound units of moderate to steepl ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The BHCP considers a multi-open pit mining scenario that will extract ore using conventional drill and blast, load and haul and dump processes. The operation is planned to use excavator and rigid body trucks along with a fleet of auxiliary equipment. This proposed mining method is considered appropriate for the deposit style.

Up to 6.3Mt of ore will be hauled annually to a stockpile area (ROM) proximal to the processing plant located centrally to the pits and waste material hauled to the waste emplacements located in close proximity of each pit. During periods where the quantity of ore mined exceeds the quantity processed, additional temporary long-term stockpile areas may be utilised.

Mining loss and dilution was modelled by re-blocking the resource block models to a mining unit size consistent with practical mining constraints at the required production rate. The resource block models were estimated at a parent block size of 5m (east), 10m in (north) and 10m (elevation) then sub-blocked against interpreted domain boundaries to a minimum block size of 1.25m (east), 2.5m in (north) and 2.5m (elevation). The mining model re-blocked the sub-blocked resource model to a regular size of 2.5m (east), 5m in (north) and 5m (elevation). This has the effect of diluting blocks along the margins of the estimated mineralisation with dilution most apparent in thin zones such as the complex areas in the Railway deposit.


Crushing and Grinding


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityProductUnitsAvg. AnnualLOM
Cobalt Metal in sulphate t 3,55057,000
Sulphur kt  ......  Subscription required

Operational Metrics:

Metrics
Stripping / waste ratio  ......  Subscription required
Waste tonnes, LOM  ......  Subscription required
Ore tonnes mined, LOM  ......  Subscription required
Total tonnes mined, LOM  ......  Subscription required
Annual processing rate  ......  Subscription required
Annual ore mining rate  ......  Subscription required
* According to 2020 study.
Subscription required - Subscription is required.

Reserves at June 30, 2022:
The Mineral Resource estimate has been reported at a cut-off of 275 ppm cobalt equivalent.

CategoryTonnage CommodityGradeContained Metal
Probable 71.8 Mt Cobalt 710 ppm
Probable 71.8 Mt Sulphur 7.6 %
Measured 18 Mt Cobalt 1030 ppm 18.3 kt
Measured 18 Mt Sulphur 10.9 % 1,935 kt
Measured 18 Mt Cobalt Equivalent 1276 ppm
Measured 18 Mt Nickel 191 ppm 3.4 kt
Indicated 59 Mt Cobalt 631 ppm 37.1 kt
Indicated 59 Mt Sulphur 6.9 % 4,062 kt
Indicated 59 Mt Cobalt Equivalent 788 ppm
Indicated 59 Mt Nickel 123 ppm 7.2 kt
Inferred 41 Mt Cobalt 619 ppm 25.6 kt
Inferred 41 Mt Sulphur 7.2 % 2,979 kt
Inferred 41 Mt Cobalt Equivalent 781 ppm
Inferred 41 Mt Nickel 123 ppm 5.1 kt
Total Resource 118 Mt Cobalt 687 ppm 81.1 kt
Total Resource 118 Mt Sulphur 7.6 % 8,968 kt
Total Resource 118 Mt Cobalt Equivalent 859 ppm
Total Resource 118 Mt Nickel 133 ppm 15.7 kt

Commodity Production Costs:

CommodityUnitsAverage
All-in sustaining costs (AISC) Cobalt Equivalent USD  ......  Subscription required *†
C1 cash costs Cobalt USD  ......  Subscription required *†
Assumed price Sulphur USD  ......  Subscription required&nbs
Assumed price Cobalt USD  ......  Subscription required&nbs
* According to 2020 study / presentation.
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units2020
OP mining costs ($/t mined) AUD 2.96

2020 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Gross revenue (LOM) $M USD  ......  Subscription required
Pre-tax NPV @ 7.5% $M AUD  ......  Subscription required
After-tax NPV @ 7.5% $M AUD  ......  Subscription required
After-tax payback period, years  ......  Subscription required
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Pipelines
TypeMaterialDiameterLengthDescription


Proposed Heavy Mobile Equipment as of July 4, 2018:
HME TypeModelSizeQuantity
Backhoe ....................... Subscription required 111 t ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Nov 11, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 11, 2022
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2022

Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
Corporate Presentation 2022
Corporate Presentation 2022
................................... Subscription required 2020
................................... Subscription required 2019
Pre-Feasibility Study Report 2018
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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