Mining Intelligence and News

Jambreiro Project

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Mine TypeOpen Pit
  • Iron Ore
Mining Method
  • Truck & Shovel / Loader
Mine Life... Lock
SnapshotThe Jambreiro Project’s potential economics have continued to improve since the July 2019 PFS was completed, and in May 2020, Centaurus updated the key inputs to the Jambreiro project economics, including:
- Updating of the Capex for CDE Global’s latest proposal for the 1Mtpa modularised plant (including corresponding adjustment to the contingency on the capex; and
- Applying up to date FX considerations for the GBP, AUD and USD against the BRL.

Consistent with the 2019 PFS, the results of the updated 1Mtpa PFS considered forecast production of 17.9Mt of high-grade low-impurity product at a rate of 1Mtpa over a period of 18 years using the same resource and reserve previously outlined.

All other inputs and parameters used in the Revision were the same as those that outlined in the July 2019 PFS Results release of 5 July 2019. There were no material changes required to the assumptions underlying the Jambreiro Ore Reserves outlined above.


Centaurus Metals Ltd. 100 % Indirect
The Jambreiro Iron Ore Project comprises three granted Mining Leases (ML’s). All of these ML’s are 100%-owned by Centaurus Brasil Mineração Ltda, a wholly-owned Brazilian subsidiary of Centaurus.



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Deposit type

  • Iron formation hosted


The Jambreiro Project is part of a sequence of Archean to lower Proterozoic iron formations (locally known as “itabirite”) and described as the Guanhães Group in the Guanhães region. Mineralisation is hosted in a metavolcanic-sedimentary sequence of rocks including itabirites, quartz-mica schist, amphibolite and gneiss. The friable itabirite extends to a vertical depth of 120m before becoming more compact. The principal ore zone, known as the Tigre Deposit, has a strike extent of 1.8km with true widths varying between 40-80m.

There are three satellite prospects in the immediate project area within 500m of the Tigre Deposit, being: the Cruzeiro, Galo and Coelho (North and South) Deposits. The friable iron mineralisation is continuous along strike, homogenous, medium to coarse grained and composed of mainly hematite and quartz with small amounts of magnetite.

The Itabirite mineralisation comprises concentrations of medium - coarse grained friable, semi-compact and compact material that have undergone enrichment. The mineralisation is composed of quartz, hematite, magnetite, martite with minor goethite, limonite, amphibole (Grunerite), Mica (muscovite) and clay minerals.

Itabirite thicknesses vary from 10m to up to 100m generally dipping 45-70° to the W-SW. The combined strike length of the mapped mineralisation is around 3,000m. Itabirite has been intersected at depths of 240m with friable itabirite intersected to 80m.

With the combination of the Tigre (1,700m), Cruzeiro (1,200m), Galo (1,500m) and Coelho (900m) prospects, the Jambreiro Resource has dimensions of approximately 5,500m of total strike length. The ore body outcrops in most places with a localized thin colluvial cover in places and is open at depth with the deepest mineralisation being intersected at 240m depth. The mineralisation is between 10-100m thick with the average thickness in the main deposit (Tigre) being around 60m.



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Mining Methods


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Crushers and Mills


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CommodityUnitsAvg. AnnualLOM
Iron Ore kt 1,00017,900
All production numbers are expressed as concentrate.

Operational metrics

Stripping / waste ratio 0.68 *
Waste tonnes, LOM 29,522 kwmt *
Ore tonnes mined, LOM 43,339 kwmt *
Total tonnes mined, LOM 72,861 kwmt *
* According to 2019 study.

Production Costs

Cash costs Iron Ore  ....  Subscribe
Total cash costs Iron Ore  ....  Subscribe
Assumed price Iron Ore  ....  Subscribe
* According to 2020 study / presentation.

Project Costs

MetricsUnitsLOM Total
Pre-Production capital costs $M AUD  ......  Subscribe
Gross revenue (LOM) $M AUD  ......  Subscribe
EBITDA (LOM) $M AUD  ......  Subscribe
Pre-tax NPV @ 8% $M AUD  ......  Subscribe
After-tax NPV @ 8% $M AUD  ......  Subscribe
After-tax IRR, %  ......  Subscribe

Required Heavy Mobile Equipment


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Mine Management

Job TitleNamePhoneProfileRef. Date
....................... Subscription required ....................... Subscription required ........... Subscription required Subscription required Jan 16, 2024

Total WorkforceYear
...... Subscription required 2019


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