Overview
| Stage | Production |
| Mine Type | Open Pit & Underground |
| Commodities |
|
| Mining Method |
- Truck & Shovel / Loader
- Sub-level caving
- Longhole open stoping
- Dry waste backfill
|
| Production Start | ...  |
| Mine Life | 2026 |
The change in fiscal year by Asante Gold brings about a profound implication. The data for the full year 2022, previously reported under Kinross's calendar, now aligns with Asante Gold's fiscal year, categorizing it as the year 2023 in their financial statements. This realignment ensures that the financial data accurately represents Asante Gold's operational performance during its tenure as the owner of Chirano Mine.
Chirano consists of a multi-deposit complex of 11 mineralized deposits that have been historically mined from both open pit and underground operations since 2005. It had been under Kinross management from 2010 to 2022. The Mine includes open pit operations at the Mamnao (North, Central, South) and six underground operations on the Akwaaba, Suraw, Akoti, Paboase, Tano and Obra Deposits. The Chirano Gold Mine is fully permitted. |
Source:
p. 3
| Company | Interest | Ownership |
|
Asante Gold Corp.
|
90 %
|
Indirect
|
|
Chirano Gold Mines Ltd.
(operator)
|
100 %
|
Direct
|
On August 10, 2022, Asante Gold Corp. closed the acquisition of all of the issued and outstanding shares in the capital of Red Back Mining Pty Ltd, which indirectly holds a 90% interest in the Chirano Gold Mine (“Chirano”) pursuant to a share purchase and sale agreement dated April 24, 2022, as amended, (the “Purchase Agreement”) among the Company, KG Africa B.V. (the “Vendor”), an indirect subsidiary of Kinross Gold Corporation (“Kinross”), and Kinross (the “Chirano Acquisition”). The Ghanaian government will continue to retain a 10% carried interest in Chirano.
Contractors
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Deposit Type
- Breccia pipe / Stockwork
- Vein / narrow vein
Summary:
In Ghana, the Paleoproterozoic Birimian terrains consist of five linear northeast-trending volcanic belts with intervening sedimentary basins. The volcanic belts have been folded by multiple deformation events and are generally 15-40 km wide and extend for several hundred kilometres laterally. The Kumasi Basin is 90 km wide and lies between the Ashanti Belt to the south-east and the Sefwi Belt to the north-west. The combined Sefwi and Ashanti volcanic belts and intervening Kumasi Basin host most of the gold endowment in Ghana. Other world class deposits within the Belt include Ahafo (20Moz, Newmont) and Bibiani (2.3Moz, Asante).
On a regional scale, the Chirano Gold Mine is located on the eastern limb of the West African Precambrian Shield which is a cratonised complex of Archaean basement. Most gold deposits in Ghana are located in or adjacent to the Ashanti Gold Belt, the Bibiani-Sefwi Belt and the Asankrangwa Belt.
The Chirano mines and associated mineralized deposits lie within the Proterozoic terrain of southwest Ghana along a major structure separating the Sefwi Belt to the west from the Kumasi Basin to the east known as the Bibiani Shear Zone ("BSZ"). The belt and basin architecture comprises rocks of Birimian age, with the belts being dominated by mafic volcanics and the basins typified by fine-grained, deep marine sediments. Both are intruded by granites. The Chirano deposits lie close to a splay off the BSZ known as the Chirano Shear Zone ("CSZ ........
Mining Methods
- Truck & Shovel / Loader
- Sub-level caving
- Longhole open stoping
- Dry waste backfill
Summary:
Open pit mining activities first commenced in 2005 when the Chirano Gold Mine was operated by Red Back Mining. First gold from the Chirano Gold Mine was poured in October 2005. Multiple pits were operated along the full strike length of the deposits, with the first underground operation, Akwaaba, commencing in 2008. The most recent mine, Obra was commenced in 2021.
There are six operating underground mines. From south to north these are Akwaaba, Suraw, Akoti, Paboase, Tano and Obra. There are three open pits operating at the northern portion of the mining lease, which are Mamnao South, Mamnao Central and Mamnao North. These three pits are undergoing cutbacks and will eventually form a single large open pit.
All underground mining operations are undertaken by CGML employees. The underground mining operations utilize trackless mobile fleet consisting primarily of Volvo, Caterpillar and Sandvik equipment. Depending on the geometry of the mineralized deposits the mining methods consist of Sub level caving (SLC) and Sub Level Open Stoping. Mineralized material from the underground operations is hauled to their respective portals or pit crests, where it is generally stockpiled for future delivery to the process plant ROM pad.
A Ghanian contract mining company (Maxmass) are used for open pit mining operations at CGML. The open pits are scheduled to be completed by 2024.
The six underground operations generate 2Mtpa, while the pits will ave ........
Source:
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Flow Sheet:
Summary:
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Production:
On August 10, 2022, the Kinross announced that it had completed the sale of its 90% interest in the Chirano mine in Ghana to Asante Gold Corporation. Data was taken and calculated from two companies (Kinross and Asante).
| Commodity | Units | 2023 | 2021 | 2020 | 2019 | 2018 | 2017 |
|
Gold Equivalent
|
oz
| | ...... | ...... | ...... | 226,699 | 246,027 |
All production numbers are expressed as metal in doré.
^ Guidance / Forecast.
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Operational Metrics:
| Metrics | 2023 | 2021 | 2020 | 2019 | 2018 |
|
Ore tonnes mined
| | ...... | 3,053 kt | 2,569 kt | 2,013 kt |
|
Annual ore mining rate
| ...... | ...... | | | |
|
Annual milling capacity
| ...... | ...... | 3.5 Mt | 3.5 Mt | 3.5 Mt |
|
Tonnes processed
| ...... | ...... | 3,275 kt | 3,457 kt | 3,506 kt |
^ Guidance / Forecast.
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Reserves at December 31, 2021:
Mineral Resources: Akoti South, Obra, Mamnao, Kolua, Sariehu open pits were evaluated at cut-off 0.24, 0.20, 0.31, 0.45 and 0.22 cut-offs respectively.
Akwaaba, Tano, Obra and Suraw were evaluated at resource cut-off grade of 1.14 g/t and Akoti and Paboase undergrounds
were evaluated at 1.21 g/t and 1.34 g/t cut-off respectively.
| Category | OreType | Tonnage | Commodity | Grade | Contained Metal |
|
Proven
|
Total
|
5,600 kt
|
Gold
|
1.51 g/t
|
271.4 koz
|
|
Probable
|
Total
|
10,160 kt
|
Gold
|
2.2 g/t
|
718.3 koz
|
|
Proven & Probable
|
Total
|
15,760 kt
|
Gold
|
1.95 g/t
|
989.7 koz
|
|
Measured
|
In-Situ (OP)
|
4.45 Mt
|
Gold
|
0.8 g/t
|
0.115 M oz
|
|
Measured
|
In-Situ (UG)
|
4.751 Mt
|
Gold
|
2.01 g/t
|
0.308 M oz
|
|
Indicated
|
In-Situ (OP)
|
12.6 Mt
|
Gold
|
0.86 g/t
|
0.35 M oz
|
|
Indicated
|
In-Situ (UG)
|
6.299 Mt
|
Gold
|
1.79 g/t
|
0.362 M oz
|
|
Measured & Indicated
|
In-Situ (OP)
|
17.05 Mt
|
Gold
|
0.85 g/t
|
0.465 M oz
|
|
Measured & Indicated
|
In-Situ (UG)
|
11.05 Mt
|
Gold
|
1.88 g/t
|
0.669 M oz
|
|
Inferred
|
In-Situ (OP)
|
1.26 Mt
|
Gold
|
0.73 g/t
|
0.029 M oz
|
|
Inferred
|
In-Situ (UG)
|
4.791 Mt
|
Gold
|
2.22 g/t
|
0.343 M oz
|
Source:
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Corporate Filings & Presentations:
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