Source:
p. 34
Galiano Gold and Gold Fields Limited jointly each own a 45% interest in Asanko Gold Ghana Limited (“AGGL”), with the Government of Ghana retaining a 10% free-carried interest. The Asanko Gold Mine (“AGM”) concessions are owned 100% by Asanko Gold Ghana Limited.
Contractors
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Deposit Type
- Vein / narrow vein
- Porphyry
Summary:
Property Geology and Mineralization
The AGM deposits are hosted along the NE-SW Asankrangwa structural shear corridor, which is defined by NE-SW trending lineaments and magnetic lows and is about 7 km wide and over 50 km long.
Nkran
Nkran occurs on a 20° trending jog on the Nkran Shear Corridor. The Nkran Shear is characterized by sheared siltstones (phyllites) dominant on the western side of the shear and sandstone dominant on the east. The central part of the Nkran deposit consists of a series of wacke and sandstone-dominated stratigraphy that has been intruded by several felsic porphyry intrusions (see Davis, 2016). Consistent mappable lithologies are the western sandstone, the central sandstone, the eastern sandstone, the felsic granitic porphyry intrusive unit, and the skinny breccia unit which is located within the eastern sandstones and runs along the strike of the deposit.
Esaase
Broadly speaking, the Esaase deposit area can be referred to as a ‘system of gold-bearing quartz veins hosted by tightly folded Birimian-age sedimentary rocks arranged along an NNE-SSW trending strike’. Since the maiden resource release in October 2007, various simplified geological models have been used to constrain the resource estimation.
Akwasiso
The Akwasiso deposit lies some 4 km NE of the main Nkran deposit and geologically bears many similarities to Nkran. A granite intrusion surrounds a 080° dipping cross structure and mi ........
Summary:
Mining by conventional open pit methods of drill and blast followed by load and haul will be employed. Drilling and blasting will be performed on 6 m benches. Loading of the blasted material will be performed on two 3 m flitches. Mining is currently undertaken by two separate mining contractors under the direction of Asanko Gold management.
The primary mining fleet of trucks and excavators is supported by standard open-pit drilling and auxiliary equipment. GC drilling ahead of mining is standard practice. Mining operations occur around the clock on two 12-hour shifts. A pre-split wall control method is being implemented along all the pit walls in the fresh zones to ensure the stability of the pit walls.
Blending strategy
The mine plan was developed around a 5.4 Mtpa processing throughput, where between 20% and 50% of the feed is oxide. A blending program is followed throughout the LOM that consider grade-bins, oretypes and Bond-work-index (BWI).
Mining operations
Grade control
Grade control (GC) drilling and sampling will be required to determine whether material in a given area is above, or below the cut-off grade. The ore is not anticipated to be visually controlled in the active mining face. GC definition drilling and sampling will be required to delineate the ore zone prior to the blast planning of the ore blocks.
Site preparation
The entire mining area will be cleared of buildings, installation ........
Source:
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Flow Sheet:
Summary:
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Production:
| Commodity | Units | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 |
|
Gold
|
oz
| ...... ^ | ...... | ...... | ...... | 223,152 | 205,047 | 147,501 |
|
Silver
|
oz
| | | | ...... | ...... | ...... | ...... |
All production numbers are expressed as metal in doré.
^ Guidance / Forecast.
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Operational Metrics:
| Metrics | 2021 | 2020 | 2019 | 2018 | 2017 |
|
Total tonnes mined
| ...... | ...... | 30,790 kt | 44,142 kt | 34,156 kt |
|
Ore tonnes mined
| ...... | ...... | 5,071 kt | 4,898 kt | 4,048 kt |
|
Waste
| ...... | ...... | 25,719 kt | 39,244 kt | 30,108 kt |
|
Tonnes milled
| ...... | ...... | 5,498 kt | 5,180 kt | 3,744 kt |
|
Stripping / waste ratio
| ...... | ...... | 5.1 | 8 | 7.4 |
|
Annual milling capacity
| ...... | ...... | 5.4 Mt | 5 Mt | 5 Mt |
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Reserves at February 28, 2022:
Mineral Resource are reported at a 0.5 g/t Au cut-off and $1,600/oz Au.
| Category | Tonnage | Commodity | Grade | Contained Metal |
|
Measured
|
23.6 Mt
|
Gold
|
1.06 g/t
|
808 koz
|
|
Indicated
|
42.7 Mt
|
Gold
|
1.53 g/t
|
2,096 koz
|
|
Measured & Indicated
|
66.4 Mt
|
Gold
|
1.36 g/t
|
2,904 koz
|
|
Inferred
|
6.4 Mt
|
Gold
|
1.49 g/t
|
309 koz
|
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