Overview
Stage | Production |
Mine Type | Open Pit |
Commodities |
|
Mining Method |
|
Processing |
- Smelting
- Crush & Screen plant
- Heap leach
- Carbon in column (CIC)
- Solvent Extraction & Electrowinning
- Cyanide (reagent)
|
Mine Life | 5 years (as of Jan 1, 2019) |
30 November 2021 - GoldStone Resources Limited (AIM: GRL), is pleased to announce that it has now successfully completed its first commercial gold pour at the Homase Mine.
The Group commenced mining operations in May 2021, following the pre-stripping and clearing of the Homase Mine site. As announced on 13 May 2021, the planned gold production for the first eight months from commencement of mining now exceeds the Group's original guidance of 14,400 ounces per annum, stated in the DEP, to produce some 25,000 ounces of gold, at a total cash cost, pre-tax, of under US$600per ounce for the thirty metre pit. |
Latest News | GoldStone Resources Ltd: Gold Production and Gold Loan Update November 30, 2021 |
Source:
p. 46
Deposit Type
- Sedimentary - Volcanogenic
- Vein / narrow vein
Summary:
The property is underlain by the Ashanti gold belt, one of the world’s most significant Proterozoic gold belts discovered to date. The belt is the most prominent of the five Birimian Supergroup gold belts found in Ghana and is predominantly comprised of sedimentary and mafic volcanic rocks. The Brimian terranes in the southern part of the West African craton are several different volcano-sedimentary formations including metamorphosed volcanic, sedimentary and plutonic rocks and low-grade metavolcanics and metasediments. Two types of granite are present, one is more resistant to weathering than the other, with the less-resistant granite containing gold mineralization.
Mineralized shears are found close to the contact with harder metamorphosed and metasomatically altered geology forming the Upper Birimian volcanics. Two main ore types are present at AKHM hosted within quartz veins and sulphide ores. Subsurface investigation within the mineralized trend undertaken by Ashanti Goldfields revealed a wide zone of shear about 800m long, 14m wide between 255m and 70mRL elevation. Shear mineralized zone metasediments dip sub-vertical or steeply to the NW and strike NNE.
Comparable features of Birimian mesothermal gold mineralization between Obuasi and AKHM (Akrokeri-Homase) include quartz veins and mineralization in graphitic shear zones, along with visible gold occurring in fractures within a quartz veins. Most of the gold is contained between these graphite-rich shears and thin quartz-chlorite units within sheared metasediments.
Summary:
The Homase Mine, set within its AKHM project in Ghana, consists of five open pits, targeting the oxide resource to a vertical depth of 30 metres.
Processing
- Smelting
- Crush & Screen plant
- Heap leach
- Carbon in column (CIC)
- Solvent Extraction & Electrowinning
- Cyanide (reagent)
Flow Sheet:
Summary:
The company will be treating the oxides from the Homase Mine on the heap leach processing facility and retreating the tailings from the former Akrokeri Mine that closed in 1909, with results from an auger drilling showing three blocks of viable mineralized zones to a depth of three meters with an average grade of 2.27g/t and estimated tonnages of 91,000t. Metallurgical testwork indicated tailings are amenable to the cyanide heap leach process with an overall recovery of 73%. GoldStone expect to recover up to 5,000oz from these tailings over the life of mine.
Production:
Commodity | Units | Avg. Annual (Projected) | LOM (Projected) |
Gold
|
oz
| 14,400 | 72,000 |
All production numbers are expressed as metal in doré.
Reserves at September 30, 2019:
Category | Tonnage | Commodity | Grade | Contained Metal |
Measured
|
1.61 Mt
|
Gold
|
2.24 g/t
|
116,000 oz
|
Indicated
|
4.41 Mt
|
Gold
|
1.73 g/t
|
245,000 oz
|
Measured & Indicated
|
6.01 Mt
|
Gold
|
1.87 g/t
|
361,000 oz
|
Inferred
|
4.56 Mt
|
Gold
|
1.64 g/t
|
241,000 oz
|
Total Resource
|
10.6 Mt
|
Gold
|
1.77 g/t
|
602,000 oz
|
Mine Management:
Job Title | Name | Profile | Ref. Date |
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Jul 29, 2021
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Corporate Filings & Presentations:
Document | Year |
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2021
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2021
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2020
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2019
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