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DRC
Musonoi Project

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 Location:
0 km W from Kolwezi, DRC

  Project Contacts:
Ruashi Mine Site, Luano
Lubumbashi
DRC
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Overview

StageConstruction
Mine TypeUnderground
Commodities
  • Copper
  • Cobalt
Mining Method
  • Cut & Fill
  • Post Pillar Cut & Fill
  • Longhole open stoping
Processing
  • Calcining
  • Filter press plant
  • Flotation
  • Concentrate leach
  • Solvent Extraction & Electrowinning
  • Roasting
Mine Life19 years (as of Jan 1, 2018)
The construction of the Group’s core Musonoi copper-cobalt project was also in full steam in 2020 where the construction of main shaft, ventilation shaft, office facility, living camp, warehouse and core shed have all been underway/commenced in 2020.


Owners

Source: p. 22, 240, 253, 254
CompanyInterestOwnership
Gécamines S.A 25 % Indirect
Jinchuan Group International Resources Co. Ltd. 75 % Indirect
Jinchuan Group International Resources (“Jinchuan International”) is a majority-owned subsidiary of Jinchuan Group and flagship platform for overseas resources development.

Via its subsidiary – Metorex, Jinchuan International owns 75% interest in Ruashi Mining SAS which owns the Musonoi Project. The remaining 25% interest in Ruashi Mining SAS is held by Gécamines S.A.(La Générale des Carrières et des Mines)

Deposit Type

  • Sediment-hosted
  • Breccia pipe / Stockwork


Summary:

A strike length of 600 m to 700 m has been identified with the deepest drill intersection obtained being 550 m below surface. Mineralisation remains open ended at depth. The mineralisation is typical of that of the Kamoto and KOV Mines with two HG zones.

The mineralised zones consist of talc shales, breccias and siltstones forming part of the meta sedimentary sequence. Copper and cobalt mineralisation is generally in the form of malachite and heterogenite/kolwezite in the oxide portion of the deposit and chalcocite, bornite and carrollite in the deeper sulphide zone. The depth of oxidation is approximately 190 m to 220 m below surface.

The ore body is open ended to depth and no flattening of the dip indicating proximity of the fold closure has been intersected thus far. The solids modelling was extrapolated 50 m east and west of the last drill hole intersection (along strike), and 50 m beyond the last drill hole intersection to depth (down dip).


Mining Methods

  • Cut & Fill
  • Post Pillar Cut & Fill
  • Longhole open stoping


Summary:

The studies indicated that the orebody occurs on the eastern end of the Dilala Syncline and is a blind deposit with high-grade mineralization starting at between 50m and 100m below surface. The orebody has a strike length of 600m to 700m and is open ended at depth below 600m from surface, and will be mined from underground using a long hole stoping mining method and a cut and fill with post pillars mining method.

The Musonoi East deposit comprises two mineralised zones roughly 14 m thick separated by a siliceous dolomite zone which is approximately 20 thick. The sequence dips 70° south and the strike length is approximately 600 m. The stratigraphic sequence has been overturned and the mineralised zone sub-outcrops on a fault some 50 m below surface, which are overlain by RAT strata. The Musonoi Study assumed a depth extent for the orebody of 500 m below surface.

Two open stoping methods with fill were selected, viz. top down underhand long hole open stoping (“LHOS”) and bottom up sublevel open stoping (“SLOS”). Both methods have similar operating costs, maximise ore extraction, employ a vertical level interval of 25 m and permit maximum flexibility in terms of stope selection and grade control.

Long Hole open stoping (LHOS)
Drilling, blasting and cleaning longitudinal stopes in the normal sublevel open stoping mode would be followed, but without leaving pillars and working from top downwards. When the stope has been mined to its defined strike length, it is filled with a high density cemented paste that is allowed to cure before adjacent stopes are mined. The optimum strike length at Musonoi Est is 40 m. A temporary holding pillar of 4 to 5 m on strike is left between the stopes and blasted with the slot of the next stope.

Stopes are developed by driving horizontally on the orebody footwall contact at 25 m vertical intervals and by access drives in the hangingwall of each orebody at the same elevation. A sill pillar will be left between the sulphides and oxides to permit future mining of the oxide deposits. Based on available geotechnical information, the first level was set at 300 m below surface with the top holing on the 275 m level.

Each stope will contain about 36 kt of ore. The development, drilling, blocking, cleaning and filling cycle per stope will take about 5.2 months. Eleven active stopes will be required at any time, services by 4 LHDs with 10 t buckets.


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

Summary:

Based on the June 2013 Mintek report, the envisaged flowsheet will probably entail single stage crushing followed by a RoM ball mill and flotation circuit.


Processing

  • Calcining
  • Filter press plant
  • Flotation
  • Concentrate leach
  • Solvent Extraction & Electrowinning
  • Roasting

Flow Sheet: Subscription required

Summary:

Based on the June 2013 Mintek report, the envisaged flowsheet will probably entail single stage crushing followed by a RoM ball mill and flotation circuit. The optimum grind was found to be 80% -106 µm. A final decision on the flowsheet still needs to be made.

The Musonoi Study concluded that due to high off- mine costs associated with the transport and treatment of Cu and Co concentrates, a preferable option would be to produce a bulk Cu/Co concentrate through a flotation plant. This concentrate could then in the future be combined with the Kinsenda sulphide concentrates in a central roasting plant to produce a calcined product that would be leachable in a conventional SX-EW plant.


Projected Production:

CommodityProductUnitsAvg. Annual
Copper Cathode t 34,000
Cobalt Hydroxide t  ......  Subscription required

Operational Metrics:

Metrics
Annual ore mining rate 1,000 kt *
* According to 2013 study.

Reserves at December 31, 2020:

CategoryOreTypeTonnage CommodityGradeContained Metal
Proven Sulphide & Mixed 8.6 Mt Copper 3.1 % 270 kt
Proven Oxide 2.8 Mt Copper 3.2 % 90 kt
Proven Total 11.4 Mt Copper 3.1 % 360 kt
Proven Sulphide & Mixed 8.6 Mt Cobalt 0.9 % 73 kt
Proven Oxide 2.8 Mt Cobalt 1.1 % 30 kt
Proven Total 11.4 Mt Cobalt 0.9 % 103 kt
Probable Sulphide & Mixed 8.3 Mt Copper 2.7 % 222 kt
Probable Oxide 0.6 Mt Copper 2 % 12 kt
Probable Total 8.9 Mt Copper 2.6 % 234 kt
Probable Sulphide & Mixed 8.3 Mt Cobalt 0.8 % 67 kt
Probable Oxide 0.6 Mt Cobalt 0.7 % 4 kt
Probable Total 8.9 Mt Cobalt 0.8 % 71 kt
Proven & Probable Sulphide & Mixed 16.9 Mt Copper 2.9 % 492 kt
Proven & Probable Oxide 3.4 Mt Copper 3 % 102 kt
Proven & Probable Total 20.3 Mt Copper 2.9 % 594 kt
Proven & Probable Sulphide & Mixed 16.9 Mt Cobalt 0.8 % 140 kt
Proven & Probable Oxide 20.3 Mt Cobalt 1 % 34 kt
Proven & Probable Total 20.3 Mt Cobalt 0.9 % 174 kt
Measured Sulphide & Mixed 12.8 Mt Copper 2.7 % 339 kt
Measured Oxide 4.7 Mt Copper 3.1 % 144 kt
Measured Total 17.5 Mt Copper 2.8 % 483 kt
Measured Sulphide & Mixed 12.8 Mt Cobalt 0.8 % 100 kt
Measured Oxide 4.7 Mt Cobalt 1 % 48 kt
Measured Total 17.5 Mt Cobalt 0.8 % 148
Indicated Sulphide & Mixed 13.1 Mt Copper 2.2 % 292 kt
Indicated Oxide 1.2 Mt Copper 1.9 % 22 kt
Indicated Total 14.3 Mt Copper 2.2 % 314 kt
Indicated Sulphide & Mixed 13.1 Mt Cobalt 0.8 % 107 kt
Indicated Oxide 1.2 Mt Cobalt 0.8 % 9 kt
Indicated Total 14.3 Mt Cobalt 0.8 % 116 kt
Inferred Sulphide & Mixed 11.6 Mt Copper 2.2 % 258 kt
Inferred Oxide 1.4 Mt Copper 2 % 29 kt
Inferred Total 13 Mt Copper 2.2 % 287 kt
Inferred Sulphide & Mixed 11.6 Mt Cobalt 0.8 % 88 kt
Inferred Oxide 1.4 Mt Cobalt 0.7 % 10 kt
Inferred Total 13 Mt Cobalt 0.75 % 98 kt
Total Resource Sulphide & Mixed 37.4 Mt Copper 2.4 % 890 kt
Total Resource Oxide 7.3 Mt Copper 2.7 % 195 kt
Total Resource Total 44.7 Mt Copper 2.4 % 1,085 kt
Total Resource Sulphide & Mixed 37.4 Mt Cobalt 0.8 % 295 kt
Total Resource Oxide 7.3 Mt Cobalt 0.9 % 68 kt
Total Resource Total 44.7 Mt Cobalt 0.8 % 363 kt


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jun 22, 2021
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2020
Subscription required 2019
Subscription required 2018

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
Annual Report 2018
Other 2013
Subscription required - Subscription is required.

Aerial view:

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