Overview
| Stage | Production |
| Mine Type | Open Pit & Underground |
| Commodities |
|
| Mining Method |
- Truck & Shovel / Loader
- Cut & Fill
- Alimak
- Shrinkage stoping
|
| Production Start | ...  |
| Mine Life | 5 years (as of Jan 1, 2018) |
Source:
Blue International acquired the Bogoso Prestea Gold Mine concessions in 2020, along with the Government of Ghana, which holds 10% interest in the mines.
The mining assets are developed and operated through Future Global Resources (“FGR”), established by Blue in 2020.
SAVANNAH, Georgia, July 6, 2022 /PRNewswire/ -- Hawkeye Systems, Inc. (OTCQB: HWKE) is pleased to announce that it has entered into a Letter of Intent (LOI) to acquire Blue Gold International Limited ("Blue Gold") an entity valued at US $250,000,000, in a share exchange that will result in a reverse takeover of Blue Gold by Hawkeye.
The transaction is subject to due diligence and definitive documentation and is expected, by all parties, to close by October 31, 2022.
Contractors
- Subscription is required.
Deposit Type
- Vein / narrow vein
- Orogenic
- Mesothermal
Summary:
The Prestea-Bogoso area occurs at the southern termination of the Ashanti Belt, where the gold deposits, mined or under exploration, are localised principally along two steep to subvertical major crustal structures referred to as the Ashanti trend and the Akropong trend. The principal structures are graphitic shear zones and mineralised fault filled quartz veins. The Bogoso Prestea section of the Ashanti Trend shows a range of mineralisation styles associated with graphitic shear zone, which represents the principal displacement zone of a regional-scale shear zone that defines the mineral belt. These styles include laminated quartz vein deposits containing free gold, highly deformed graphitic shear zones containing disseminations of arsenopyrite as the principal gold bearing phase (e.g. Buesichem, Chujah-Dumasi and Bogoso North) and disseminations of sulphides in mafic/intermediate volcanic rocks generally found in the footwall of the main shear zone.
The Bogoso Prestea deposits can be classified as a lode gold deposits or orogenic mesothermal gold deposits, which are the most common gold systems found within Archean and Paleoproterozoic terrains. In the West African shield, orogenic gold deposits are typically underlain by geology considered to be of Eburnean age and are generally hosted by volcanosedimentary sequences. The Ashanti belt is considered prospective for orogenic mesothermal gold deposits and hosts numerous other lode gold deposits such at the Obuasi ........
Mining Methods
- Truck & Shovel / Loader
- Cut & Fill
- Alimak
- Shrinkage stoping
Summary:
Mining activity includes both underground using mechanized shrinkage mining and longhole open-stoping, and a recent significant investment in open pit operations feeding both refractory and non-refractory processing plants.
The planned mining method is mechanized shrinkage mining. This method uses mechanical raise climber technology (Alimak) together with longholes drilled from the raise climber. The method is an advance in terms of safety and productivity from conventional hand-held shrinkage mining. Safety is greatly enhanced both in raise development and stoping operations by having miners protected from rockfalls and removed from working on the broken muck pile. The productivity (per miner) is enhanced by introducing short longholes for stope production.
A typical cycle for Alimak stoping is:
- Raise development in the centre of a stoping block;
- Raise hangingwall rock support;
- Drilling of longhole blast rings;
- Relocation of the raise climber infrastructure to the top of the stoping block, blasting of longhole rings and swell mucking; then,
- Final draw-down mucking and possible waste backfilling.
Small diesel and electric 2 m3 LHD’s will be used for rock haulage from the base of the stoping panel. Mine development will be by hand held drills with LHD mucking. Tramming of ore and waste along the two main levels (17 and 24) will be via an upgraded rail haulage system to Central Shaft.
The rib pi ........
Source:
- subscription is required.
Flow Sheet:
Summary:
- subscription is required.
Production:
Golden Star Resources reported 2020 production 22.3 koz during the first nine months of the year.
Oct. 1, 2020 - Golden Star Resources Ltd. has completed the sale of its 90% interest in the Bogoso-Prestea Gold Mine ("Bogoso-Prestea") in Ghana to Future Global Resources Limited.
| Commodity | Units | 2022 | 2019 | 2018 | 2017 | 2016 | 2015 |
|
Gold
|
oz
| ...... ^ | ...... | 75,087 | 130,331 | 89,673 | 114,150 |
All production numbers are expressed as metal in doré.
^ Guidance / Forecast.
- Subscription is required.
Operational Metrics:
| Metrics | 2021 | 2019 | 2018 | 2017 | 2016 |
|
Plant annual capacity
| ...... | | | | |
|
Ore tonnes mined
| ...... | 646,254 t | 502,266 t | 1,494,347 t | 1,499,656 t |
|
Waste
| ...... | 767,106 t | 928,457 t | 3,522,451 t | 4,039,768 t |
|
Tonnes processed
| ...... | 719,449 t | 1,301,976 t | 1,632,979 t | |
- Subscription is required.
Reserves at December 31, 2019:
Mineral Reserve Break-even cut-off grade estimates for the Prestea Underground Gold Mine 7.5 g/t Au.
Prestea Underground Mineral Resource has been estimated below the $1,500 per ounce pit shell of Prestea South down to 3,800 m elevation using a gold cut-off grade at 6.84 g/t Au.
| Category | Tonnage | Commodity | Grade | Contained Metal |
|
Probable
|
856 kt
|
Gold
|
11 g/t
|
302 koz
|
|
Indicated
|
24,942 kt
|
Gold
|
3.27 g/t
|
2,624 koz
|
|
Inferred
|
2,348 kt
|
Gold
|
6.93 g/t
|
523 koz
|
Commodity Production Costs:
| | Commodity | Units | 2019 | 2018 | 2017 | 2016 |
|
Cash costs
|
Gold
|
USD
|
......
|
1,292 / oz
|
632 / oz
|
800 / oz
|
Financials:
| | Units | 2019 | 2018 | 2017 | 2016 |
|
Capital expenditures
|
M USD
| ...... |
11.4
|
48.1
|
42.4
|
|
Revenue
|
M USD
| ...... |
89.9
|
148.1
|
108.9
|
Corporate Filings & Presentations:
- Subscription is required.
- Subscription is required.