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Cameroon
Minim Martap Project

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 Location:
92 km SW from Ngaoundere, Cameroon

  Project Contacts:
Y Building, Nouvelle Route Bastos, Bastos, PO Box 35616
Yaoundè
Cameroon
Phone  ...  Subscription required
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  • Overview
  • Owners
  • Geology
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  • Reserves
  • Costs & Financials
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  • Filings & News

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Overview

StagePermitting
Mine TypeOpen Pit
Commodities
  • Bauxite
  • Al2O3
Mining Method
  • Strip mining (roll-over)
  • Surface miner
  • Truck & Shovel / Loader
Mine Life20 years (as of Jan 1, 2020)
The ESIA submission over the Project is complete. The company’s application for a Mining Permit is progressing well with the administrative period for objecting to the processing of the Mining Permit application having passed. The next step is the signing of a Mining Convention with the Government of Cameroon, which the company believes is imminent. The required documentation has been forwarded by the Minister of Mines to the Prime Minister of Cameroon for approval before signing.
Latest NewsCanyon Unveils Positive Bankable Feasibility Study For Minim Martap Project     June 21, 2022


Owners

Source: p. 13
CompanyInterestOwnership
Canyon Resources Ltd. 90 % Indirect
Camalco SA (operator) 100 % Direct
The Project is 100% owned by Camalco SA, a Cameroon company and a wholly owned subsidiary of Canyon Resources Limited an Australian company listed on the Australian Securities Exchange (ASX: CAY). At the granting of a Mining License, in accordance with Section 59 of the Mining Code, the state will be granted 10% ownership of Camalco free of charge. Up to an additional 25% may be requested under terms and conditions mutually consented by the parties, and with the same rights and obligations as the other shareholders.

Deposit Type

  • Bauxite


Summary:

The deposit defined within the Minim Martap Project Resource is a Bauxite Deposit. The formation of bauxite within a lateritic setting requires the presence of Al bearing ground rock, an oxygen-rich groundwater, a warm temperate – tropical environment with high rainfall levels, and time.

The presence of bauxite relates predominantly to the reduction of all other elements from the lateritic section, especially Si and Fe, leaving Al present within the very stable series of Al hydroxides of Gibbsite and Boehmite. Bauxite forms in the top of the lateritic profile where it is preserved (the top 10-15m), overlying often a 2-5m transition zone), and derived from the underlying sediments. The surface of the bauxite zone is dominated by bauxite rubble, with little Fe oxides and other minerals present – it is clearly a surface that is undergoing physical erosion over time and it is highly probable that this surface has reduced in level quite significantly since the period from which the current plateaus were meant to have been preserved.

The bauxite zone in the Cameroon Ngaoundéré region is predominantly 10-15m thick, and within it the grades of Al can vary between 35-62% Al as well as 5-30%Fe. These elements are the two main constituents. The Ngaoundal bauxite is formed from the bauxitization of a basalt and this has meant significantly lower Al Grades, higher Fe grades and very low residual Si values. The Minim Martap and Makan bauxite is formed over more Al rich basal rocks (granites, feldspar rich gneisses) and Al grades are high, Fe grades lower, and residual Si values higher.

Mineralisation as modelled extends over 15 plateaus – within the Minim Martap licence the plateaus cover an approximate total area of 20km x 20km, with individual plateaus up to 1km wide, and 10km in length. In the Makan licence there is one plateau, approximately 1km x 1km in area. In the Ngaoundal licence there are 3 plateaus, approx.. total area of 1.5km x1.5km.

All the plateaus are >35% Al2O3 mineralised generally between 6 - 10m thick, from surface.

There are multiple other plateaus identified as potentially economic-grade bauxite-hosts. These are untested by drilling or surface sampling.


Mining Methods

  • Strip mining (roll-over)
  • Surface miner
  • Truck & Shovel / Loader


Summary:

The mine design, upon which the Ore Reserve estimate is based, is simple, edge-to-edge strip mining, open-pit and resulting in very low structural geotechnical risk. The bauxite will be mined from the tops of plateaux and as such the development of significant pit walls is not a feature. As such it is not anticipated that significant structural geotechnical investigations or pit slope stability analysis will be required for this project. Mining productivity has been based on benchmarked data and equipment manufacturer input.

The PFS strategic mine schedules utilised inputs derived from the Scoping Study to refine the optimal mine areas. This resulted in a consolidated mining area about the three sub-plateaux of Beatrice South, Raymonde-East and DanielleCentral. Detailed, quarterly, mining schedules were derived from the strategic schedules.

The high-grade ore and near surface nature of the bauxite deposits lends itself to simple, industry typical mining methods, at low cost and with low strip ratios. Due to the simple nature of mining it is anticipated to be conducted as an owner operation using conventional mechanised equipment including surface-miners, bull dozers, front end loaders, haul trucks and other typical ancillary mining equipment. The potential for mining contract operations will continue to be investigated as development progresses.

The ore presents with favourable physical properties and requires no beneficiation, washing or screening. Test-work conducted with bulk samples on wet and dry washing processes and to define material handling parameters confirms the mine can produce DSO with world class grades, without any beneficiation. Material testing outcomes have been used to confirm the suitability of the supply chain solution and inform the physical technical specification of the product for potential off-takers and shipping.

Rock strength testing on over 500 samples across the priority mining areas and throughout the depth profile confirms suitability of surface miners and negates the need for drill and blast. The physical testing programme included strength testing using a point load testing machine and has confirmed the rock strength to be at the optimal range for efficient operations of surface miners. The surface miners are expected to mill thirty to fifty-centimetre (30-50cm) cuts along the highly homogenous and sub-horizontal orebody and deposit 75mm top size milled material in windrows along the mining bench. Front end loaders (FELs) will load mining trucks which will dump at plateau specific ROM pads, stockpiled in accordance to grade profiles. This method eliminates the need for blasting and decouples the on-plateau mining equipment from the road haulage trucks whilst minimising rehandle.

Groundwater conditions have been assessed from the ongoing infield water monitoring and testing programme for the assessment of pit dewatering methodologies. Current baseline and hydrology assessments by specialist subconsultants confirm perched water tables within the plateau with the bauxite mostly remaining above the zone of saturation. High permeability rates suggest rapid draining of any saturated bauxite. It is intended to advance dewater the plateaux immediately prior to mining and drainage designs have been integrated with the mine plans. Acid-base accounting analyses from the acid rock drainage programme showed only two sites are possible locations for limited acidic water generation. The alkalinity of the soils and bauxite appear to successfully buffer any acid generation.

The Ore Reserve estimate is based on the production target and forecast financial information derived from a detailed mining schedule modelled at a production rate of 5 Mtpa, ramping up from 4 Mtpa after 2 years of operations, in line with rail line upgrades as disclosed in the PFS announcement. This mining schedule was completed after the PFS, which presented the production target and forecast financial information based on a 4 million tonnes per annum mining schedule which was scaled and extrapolated to represent the ramp up to 5 million tonnes per annum in year 2026. Differences, which both the Company and the CP for Ore Reserves consider immaterial, between the material assumptions for the Ore Reserve estimate and the production target and financial forecast from the PFS are attributable to adjustments in the mine scheduling.


Crushing and Grinding


Processing


Summary:

After cutting with the surface miners, the bauxite will be loaded into mine trucks using front-end-loaders and hauled to the ROM stockpile areas (one ROM per plateau). No crushing or screening will be required. Bauxite will rehandled into high-capacity road trains and hauled from the mine areas to the rail-head at Makor, where the bauxite will be transferred onto into containerized vessels, which will be loaded onto flat-bed rail cars for transport to the port of Douala, a distance of some 840km. At the port, the bauxite will be stockpiled before being loaded onto barges and trans-shipped into ocean-going vessels for delivery to the customers – principally, alumina refineries in Europe, Middle East and Asia. The bauxite product is suitable for direct feed into alumina refineries using the low-temperature Bayer process to convert bauxite to pure alumina, and it is expected that a premium price can be obtained due to the relatively high Al2O3 grade and low SiO2 grade of the product, comp ........

Recoveries & Grades:

CommodityParameterAvg. LOM
Bauxite Head Grade, % 51.1

Projected Production:

CommodityUnitsAvg. Annual
Bauxite Mt 4.9
All production numbers are expressed as ore.

Operational Metrics:

Metrics
Stripping / waste ratio  ......  Subscription required
Annual ore mining rate  ......  Subscription required
* According to 2020 study.
Subscription required - Subscription is required.

Reserves at August 10, 2020:
Reserve cut off grades are:
- all material above 50% Total Al2O3; and
- all material below 2.5% Total SiO2 where Total Al2O3 grade is between 44% and 50%.

The cut-off grades applied is related to the definition of the total bauxite resource (>35% Al2O3), and the definition of a high grade portion of the resource which could be considered consistent and accessible within each of the plateau that contained a significant high grade component to the ores (>45% Al2O3).

CategoryTonnage CommodityGrade
Probable 97.3 Mt Al2O3 51.1 %
Indicated 839 Mt Al2O3 45.2 %
Inferred 53 Mt Al2O3 43.8 %
Total Resource 892 Mt Al2O3 45.1 %

Commodity Production Costs:

CommodityUnitsAverage
C1 cash costs Bauxite USD  ......  Subscription required *
C2 total cash costs Bauxite USD  ......  Subscription required *
C3 fully allocated costs Bauxite USD  ......  Subscription required *
Assumed price Bauxite 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 USD  ......  Subscription required
Sustaining CapEx $M USD  ......  Subscription required
After-tax Cash Flow (LOM) $M USD  ......  Subscription required
Pre-tax NPV @ 10% $M USD  ......  Subscription required
After-tax NPV @ 10% $M USD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
After-tax payback period, years  ......  Subscription required
Subscription required - Subscription is required.

Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Dec 29, 2021
....................... Subscription required ....................... Subscription required Subscription required Dec 29, 2021
....................... Subscription required ....................... Subscription required Subscription required Jul 1, 2020
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2020

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
Subscription required - Subscription is required.

News:

NewsDate
Canyon Unveils Positive Bankable Feasibility Study For Minim Martap Project June 21, 2022

Subscription required - Subscription is required.

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