Overview
Stage | Restarting |
Mine Type | Open Pit |
Commodities |
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Mining Method |
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Production Start | ... |
Mine Life | 9.5 years (as of Jan 1, 2023) |
The Kiniero gold mine operated from 2002 to 2014. The mine was placed on care and maintenance in early 2014 and was awarded to Sycamore in 2019. Robex took over the project in 2022, and now plans to restart the mine with a new 3 million tonne per annum processing plant. Mineral processing for the Kiniero Project will comprise carbon-in-leach (CIL) with gold electrowinning, in addition to gravity circuits to produce doré. The existing mining infrastructure will be refurbished and expanded with minimal additional infrastructure required.
Construction of the Kiniero Project started in Q4 2022. |
Latest News | Robex Corporate Strategy Update March 18, 2024 |
Source:
p. 56
Robex is the sole shareholder of Sycamore Mining Limited. Sycamore Mining Limited holds 85% of Sycamore Mine Guinee SAU (SMG,) with the Government of Guinea (GOG) holding the additional 15%. SMG is responsible for executing on-the-ground operations on the Property.
Contractors
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Deposit Type
- Hydrothermal
- Vein / narrow vein
Summary:
Deposit types
The deposits located on the Property are associated with the Proterozoic Birimian orogeny of West Africa. Most gold mineralization in the West African Craton is shear-zone-hosted and structurally controlled, with lithology having a minor, local influence. The mineralization developed in the Kiniero Gold District conforms to this general style of mineralization.
Generally, vein-hosted lode type mineralization of the Birimian-style is associated with regionally metamorphosed terrains that have undergone considerable deformation and polyphase intrusive events. Birimian deposits are typically strongly structurally controlled but are also commonly associated with rheological contrasts within and between different lithologies. Recent drilling at both the SGA and Sabali South deposits has indicated the lithostratigraphy as being key to how the differing lithologies support structural preparation at a local scale.
Gold mineralization is typically late-orogenic, medium-grade lodes which are strongly structurally controlled and located within quartz veins or in quartz-veined fracture zones with intermineralization intrusives. Structures can be classified from their textural development as to whether their origins are proximal or deep-seated. The principal structural trends have been identified through trenching and drilling and are also visible within the existing open pits. Exploration drilling has continued to target the main structural orient ........
Summary:
Mining at Kiniero will be undertaken by conventional contractor-operated truck and excavator openpit mining in the SGA, Jean, SGD, Sabali South, Sabali North and Central pits. Mining will be undertaken using Komatsu PC1250 sized excavators mining on 5 m benches and 2.5 m flitches loading 55 t Volvo A60H haul trucks.
Mining in upper oxide layers will be free-dig with drill-and-blast required in areas that mine through the transitional material into fresh rock. The free-dig nature of the oxide and transitional zones has been confirmed by extensive previous mining at site. Drill-and-blast will be required for approximately 1% of the oxide material, 40% of the laterite, 60% of the transitional, and 100% of the fresh.
Ore will be categorized by material and grade through in-pit grade control and will be hauled to mine ore pad (MOP) stockpiles by the Volvo A60H fleet. All ore will be rehandled at the MOPs by a fleet of Komatsu WA600 front-end loaders (FEL) which will load Ginaf HD5380T 60 t road haul trucks to deliver the ore to the process plant. Waste will be hauled to the nearest available waste dump by the Volvo A60H fleet.
Historic mining in Jean, SGA, and SGD have resulted in pit lakes that require dewatering and cleanup prior to mining.
Pit designs and phases
The ultimate pit designs for each open pit were divided into phases to allow for practical mining and access around existing workings and transition between mining are ........
Source:
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Flow Sheet:
Summary:
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Source:
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Projected Production:
Commodity | Units | Avg. Annual | LOM |
Gold
|
koz
| 90 | 851 |
All production numbers are expressed as metal in doré.
Operational Metrics:
Metrics | |
Hourly processing capacity
| ...... |
Annual processing capacity
| ...... |
Stripping / waste ratio
| ...... |
Waste tonnes, LOM
| ...... |
Ore tonnes mined, LOM
| ...... |
Total tonnes mined, LOM
| ...... |
Tonnes processed, LOM
| ...... |
* According to 2023 study.
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Reserves at June 1, 2023:
Cut-off grades for Mineral Resource reporting are:
a. SGA, Jean and Banfara: laterite 0.5 g/t Au, saprolite (oxide) 0.3 g/t Au, saprock (transition) 0.5 g/t Au, fresh 0.6 g/t Au.
b. Sabali South: laterite 0.5 g/t Au, saprolite (oxide) 0.3 g/t Au, saprock (transition) 0.7 g/t Au, fresh 0.9 g/t Au.
c. Sabali North and Central: laterite 0.5 g/t Au, saprolite (oxide) 0.3 g/t Au, saprock (transition) 0.9 g/t Au, fresh 0.8 g/t Au.
d. West Balan: laterite 0.5 g/t Au, saprolite (oxide) 0.4 g/t Au, saprock (transition) 0.5 g/t Au, fresh 0.6 g/t Au.
e. Stockpiles reported as Mineral Resources have been limited to those dumps which exhibit an average grade >0.3 g/t Au for the entire stockpile assuming no selectivity.
Mineral Resources are reported inclusive of Mineral Reserves.
Category | Tonnage | Commodity | Grade | Contained Metal |
Probable
|
27,665 kt
|
Gold
|
1.09 g/t
|
968 koz
|
Indicated
|
43.2 Mt
|
Gold
|
1.07 g/t
|
1,481 koz
|
Inferred
|
28.61 Mt
|
Gold
|
1.19 g/t
|
1,090 koz
|
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