• Data Access
  • Your Email  
  • Your Email  
Keep me signed in.
Forgot your password?
Close
  • Forgot Your Password?
  • Enter the email you signed up with and we'll email it to you.
  • Your Email  
Close
Back
MDO
Mining Data Solutions
  • Home
  • Database
  • Subscribe
  • Sign In
  • Sign In
Brazil
Jambreiro Project

This page is not tailored to
devices with screen width under 750 px.
 Location:
186 km NE from Belo Horizonte, Brazil

  Project Contacts:
Avenida Barao Homem de Melo, 4391 Salas 606 e 607 - Estoril
Belo Horizonte
Brazil
30.494.275
Phone  ...  Subscription required
Fax+55-31-9301-1938
EmailEmail
WebsiteWeb
Additional Resources for Suppliers & Investors
Drill results over 30 g/t Au
Stay on top of recent discoveries.
Search drill results by commodity and grade.
Largest mines in the Americas
Mining and mill throughput capaciites.
Full profiles of select mines and projects.
Deepest underground mines
Shaft depth and mill throughput data.
Full profiles of select mines and projects.
Heavy mobile equipment
HME type, model, size and quantity.
Full profiles of select mines and projects.
Permitting and construction projects
Projects at the permitting or construction stage. Full profiles of select projects.
Mines with remote camps
Camp size, mine location and contacts.
Full profiles of select mines and projects.
Mines & projects in Brazil
A list of country's mines and projects.
Full profiles of select mines and projects.
  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

Thank you for browsing through mine profiles compiled by the Mining Data Online team.

Would you like to subcribe or schedule a Demo?
  • Name:
     
  • Company:
     
  • Position:
     
  • Phone:
  • Email:
  • Message:

Overview

StagePermitting
Mine TypeOpen Pit
Commodities
  • Iron Ore
Mining Method
  • Truck & Shovel / Loader
Processing
  • Gravity separation
  • Spiral concentrator / separator
  • Jig plant
  • Dewatering
  • Magnetic separation
Mine Life18 years (as of Jan 1, 2019)
The 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.


Owners

Source: p. 6
CompanyInterestOwnership
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.

Deposit Type

  • Iron formation hosted


Summary:

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.


Mining Methods

  • Truck & Shovel / Loader


Summary:

The proposed mining method for the Jambreiro Project is an open pit mine. There are minimal pre-strip requirements and site access preparations are minimal and will be carried out by a local mining contractor.

The ore will feed a conventional beneficiation plant and the waste will be stored in appropriate waste dump locations. Filtered tailings are to be filtered and blended with mine waste.

A mining dilution factor of 2% has been applied for the deposit. The ore contacts are sharp and visual and the small mining equipment will allow for selective mining.

A mining recovery factor of 98% has been utilised. Similarly to mine dilution, the configuration of the deposit and the selected mining equipment will allow good mining recoveries to be achieved.

The mine parameters were set to accommodate the selected 40t trucks. Free digging is expected in all friable itabirite and waste and as such the mining will be performed on nominal 5 metres benches, with final bench heights of 10 metres.

The friable Ore Reserve will provide the Company with approximately 17.9Mt of high-grade product, at an average life-of-mine recovery of 41%, underpinning the initial 18-year mine life at Jambreiro. The average strip ratio for the first four years of the operation is 0.56:1, with a total life-of-mine strip ratio of only 0.68:1 based on a total material movement of 72.9Mt.

The nature of the Jambreiro ore bodies allows for low strip ratios and shorter haulage routes for the first five years. The ore and waste are predominantly free-dig from surface over the life of the current mine design, with blasting only expected for 5% of the total material movement for the project. Pit exit ramps have been designed to allow easy access to the ROM-pad area, primary crusher and the main waste storage areas while maintaining a minimum haulage distance.

Where possible, ramp development has been restricted to the footwall side of the pit to minimise the strip ratio.

The mine will be operated by a local mining contractor using 40-tonne off-road trucks that are commonly used in Brazil and readily available in the region.

The road widths in the pit are 12m, including 6m safety berms and a 10-12% road gradient to accommodate the 40-tonne truck fleet.


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

Summary:

The process plant consists of the following major elements:
• Primary Screening;
• Primary Crushing and Secondary Crushing and Screening (from year 11, introduction of semi-compact ore);
• Tertiary Crushing and Screening;
• Scavenger Ball Mill.


Processing

  • Gravity separation
  • Spiral concentrator / separator
  • Jig plant
  • Dewatering
  • Magnetic separation

Flow Sheet: Subscription required

Summary:

The Jambreiro Project ROM ore is friable in nature and composed mostly of iron oxides (hematite with minor magnetite) and silica. The grain size distribution test on the ROM ore showed that the top size of the friable material is 44.5 mm with 80% passing at 2.4 mm, demonstrating the sand-like nature of the ore.

The ore characteristics and the desired concentrate specifications lead to the choice of jigging, spirals and Wet High Intensity Magnetic Separation (WHIMS) as the core Jambreiro beneficiation route.

The feed to the WHIMS circuits is also pre-treated in a Low Intensity Magnetic Separation (LIMS) circuit to recover (to concentrate) the small amount of magnetite in the ore.

The process plant consists of the following major elements:
• Jigging;
• Spirals concentration;
• Magnetic Separators (LIMS and WHIMS);
• Slimes and tailings Thickener;
• Centrifuge Tailings dewatering;
• Products dewatering by screens.

Recoveries & Grades:

CommodityParameterAvg. LOM
Iron Ore Recovery Rate, % 41
Iron Ore Head Grade, % 29.1
Iron Ore Concentrate Grade, % 65

Projected Production:

CommodityUnitsAvg. AnnualLOM
Iron Ore kt 00
All production numbers are expressed as concentrate.

Operational Metrics:

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.

Reserves at December 31, 2020:
Ore Reserves and Mineral Resource estimate 20% Fe cut-off grade.

CategoryTonnage CommodityGrade
Proven 35.4 Mt Iron 28.5 %
Probable 13.1 Mt Iron 27.2 %
Proven & Probable 48.5 Mt Iron 28.1 %
Measured 44.3 Mt Iron 29.2 %
Indicated 37.7 Mt Iron 27.5 %
Inferred 45.1 Mt Iron 27.3 %
Total Resource 127.1 Mt Iron 28 %

Commodity Production Costs:

CommodityUnitsAverage
Cash costs Iron Ore AUD  ......  Subscription required *
Total cash costs Iron Ore AUD  ......  Subscription required *
Assumed price Iron Ore USD  ......  Subscription required *
* According to 2020 study / presentation.
Subscription required - Subscription is required.

2020 Study Costs and Valuation Metrics :

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

Proposed Heavy Mobile Equipment as of July 5, 2019:
HME TypeSizeLeased or
Contractor
Truck (haul) 40 t Leased

Mine Management:

Job TitleNamePhoneEmailProfileRef. Date
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Jan 25, 2022
....................... Subscription required ....................... Subscription required Subscription required Jan 25, 2022
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2019

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
Subscription required - Subscription is required.

Subscription required - Subscription is required.

Terms of Use Privacy Policy © 2017-2022 MDO Data Online Inc.