Overview
Stage | Production |
Mine Type | Open Pit |
Commodities |
|
Mining Method |
|
Production Start | ... |
Mine Life | 2032 |
Kingsgate Consolidated Limited officially reopened the Chatree Gold Mine in March 2023 following approval by the Department of Primary Industries and Mines in Thailand.
Between restart in March 2023 to 29 November 2023 were produced approximately 27,000 ounces of gold and 290,000 ounces of silver from low-grade stockpiles.
16 October, 2023 - mining operations have started in the A Pit West at the Chatree Gold Mine. Initial works are focussing on mining approximately 200,000 tonnes of broken waste rock and ore that remained when Chatree was closed at the end of 2016. |
Source:
p. 24,30,71
Akara Resources, Kingsgate’s wholly owned Thai subsidiary owns and operates the Chatree gold mine.
Contractors
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Deposit Type
- Epithermal
- Vein / narrow vein
Summary:
The geology of the host rocks and the mineralisation is exposed in the open pit mines in the Chatree leases and the area has been the subject of a number of geological investigations commissioned by Akara.
In the mine area, the host volcanic sequence comprises four main units. The basal unit is dominated by andesite lavas and breccias, containing dacite dome complexes. This is followed by a thick sequence dominated by andesitic breccia. Overlying this is a largely sedimentary package with interfingering rhyolitic breccias. The uppermost unit in the mine area is a lithic rich fiamme breccia. As the lithologies interfinger, the locations of some unit boundaries in core, and especially in chips, are not always clear. All units are cut by dykes, predominantly andesitic, and typically less than 10 metres wide.
Mineralisation
Epithermal gold deposits, such as those at Chatree, are generally formed in areas of active volcanism around the margins of continents, and may be associated with “bonanza” or high grade style mineralisation. Mineralisation in such deposits is deposited from hot fluids which are estimated to range in temperatures from less than 100 degrees centigrade to approximately 300 degrees centigrade. The mineralisation contained in these fluids is deposited as they rise to elevated crustal settings and boil, cool or mix with evolved nearsurface waters which oxidise the fluids to promote high grade gold deposition. The fluids usually travel to ........
Summary:
Chatree comprises multiple open pits with two carbon-in-leach processing plants able to process 5.5 Mtpa.
• First Phase- mining operations recommenced in A West (September 2023)
• Second Phase (Jan-Feb 2024) – expanding into the Quartz Lease and K West (~400 to 500koz of Au)
Description
- Chatree was an established open pit mining operation using conventional open pit mining methods and a locally based mining contractor. Conventional open pit mining and contract mining is also assumed for the restart of operations. The Competent Person considers the mining methods to be appropriate for the deposit.
- Pit optimization was undertaken using Whittle Four-X pit optimization, with consideration of all operating costs, commodity prices, mine recovery and dilution factors, metallurgical recoveries, process throughputs, and mining rate limits. Limits were placed on pit optimization to prevent mining within 20 m of the tailing storage facilities. A revenue factor 1.12 optimal pit shell was used as the basis of the final pit designs. Stage mining was used to smooth material movements for scheduling.
- Detailed pit designs were completed for all pits, designed following pit slope recommendations of O’Bryan 2013 and dual lane haul ramps, except for the final benches, which have been designed with one way access to reduce stripping requirements.
- Bench height selection is appropriate for the deposit and expected mining e ........
Source:
Source:
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Flow Sheet:
Summary:
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Source:
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Production:
FY 2023: The Chatree Gold Mine reopened in March 2023. Low-grade stockpiles were processed.
Commodity | Units | 2023 | 2017 |
Gold
|
oz
| ...... | 89,875 |
Silver
|
oz
| ...... | |
All production numbers are expressed as metal in doré.
Operational Metrics:
Metrics | 2023 |
Annual processing capacity
| ...... |
Tonnes processed
| ...... |
Stripping / waste ratio
| ...... |
Ore tonnes mined
| ...... |
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Reserves at June 30, 2023:
Ore Reserves are based on a cut-off grade of 0.35 g/t Au;
Cut-off grades for Resources are: Chatree 0.30 g/t Au (assuming metal prices of USD1,200/oz Au, USD19.00/oz Ag and metallurgical recoveries recoveries: 83.3% Au and 38.7% Ag).
Mineral Resources are reported inclusive of Mineral Reserves.
Category | Tonnage | Commodity | Grade | Contained Metal |
Proven
|
31 Mt
|
Gold
|
0.85 g/t
|
0.85 M oz
|
Proven
|
31 Mt
|
Silver
|
7.6 g/t
|
7.5 M oz
|
Probable
|
20 Mt
|
Gold
|
0.67 g/t
|
0.43 M oz
|
Probable
|
20 Mt
|
Silver
|
7 g/t
|
4.4 M oz
|
Proven & Probable
|
51 Mt
|
Gold
|
0.77 g/t
|
1.28 M oz
|
Proven & Probable
|
51 Mt
|
Silver
|
7.3 g/t
|
11.9 M oz
|
Measured
|
73.2 Mt
|
Gold
|
|
|
Measured
|
73.2 Mt
|
Silver
|
|
|
Indicated
|
49.8 Mt
|
Gold
|
|
|
Indicated
|
49.8 Mt
|
Silver
|
|
|
Indicated
|
49.8 Mt
|
Gold Equivalent
|
|
|
Indicated
|
49.8 Mt
|
Silver Equivalent
|
|
|
Inferred
|
40.6 Mt
|
Gold
|
|
|
Inferred
|
40.6 Mt
|
Silver
|
|
|
Inferred
|
40.6 Mt
|
Gold Equivalent
|
|
|
Inferred
|
40.6 Mt
|
Silver Equivalent
|
|
|
Total Resource
|
163.6 Mt
|
Gold
|
|
|
Total Resource
|
163.6 Mt
|
Silver
|
|
|
Total Resource
|
163.6 Mt
|
Gold Equivalent
|
|
|
Total Resource
|
163.6 Mt
|
Silver Equivalent
|
|
|
Commodity Production Costs:
| Commodity | Units | 2017 |
Total cash costs
|
Gold
|
USD
|
549 / oz
|
Financials:
| Units | 2023 | 2017 |
Revenue
|
M USD
| ...... |
191.5
|
Pre-tax Income
|
M USD
| |
39.5
|
EBIT
|
M USD
| ...... |
|
EBITDA
|
M USD
| ...... |
90.7
|
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