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Thailand
Chatree Mine

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 Location:
280 km N from Bangkok, Thailand

  Project Contacts:
No. 99 Moo 9, Tambon Khao Chet Luk Amphur Thap Khlo Phichit
Thailand
66230
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageRestarting
Mine TypeOpen Pit
Commodities
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life2032
Chatree was Thailand’s first and largest modern gold mine, and it commenced commercial operations in November 2001. The mine closed in late 2016, in accordance with the closure order of the Thai Government, and was placed on care and maintenance on 1 January 2017.

In 2022, positive negotiations with the Thai Government has led to key developments and approvals to permit Akara to prepare for a restart of its Chatree operations.

10 January 2023 - The commissioning of Plant #2 will start this month leading to a ramp up into steady state production.

Ore will be initially sourced from low grade stockpiles before mining operations recommence in September 2023.


Owners

Source: p. 8
CompanyInterestOwnership
Akara Resources Public Company Ltd. (operator) 100 % Direct
Kingsgate Consolidated Ltd. 100 % Indirect
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 ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

Chatree comprises multiple open pits with two carbon-in-leach processing plants able to process 5.5 Mtpa.

Ore will be initially sourced from low grade stockpiles before mining operations recommence in September 2023.

- 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 equipment, with both ore and waste to be blasted on 9 m benches then mined in 3 m fl ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Projected Production:

CommodityUnits20232017
Gold oz  ......  Subscription required ^89,875
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.

Operational Metrics:

Metrics20172016
Annual processing capacity
Ore tonnes mined 2,589 kt3,168 kt
Stripping / waste ratio 0.9 2.5
Tonnes processed 2,773 kt5,515 kt
^ Guidance / Forecast.

Reserves at April 30, 2022:
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).

CategoryTonnage CommodityGradeContained 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 21 Mt Gold 0.67 g/t 0.44 M oz
Probable 21 Mt Silver 7.1 g/t 4.7 M oz
Proven & Probable 52 Mt Gold 0.78 g/t 1.3 M oz
Proven & Probable 52 Mt Silver 7.4 g/t 12.2 M oz
Measured 73.2 Mt Gold 0.69 g/t 1.63 M oz
Measured 73.2 Mt Silver 6.2 g/t 14.6 M oz
Indicated 49.8 Mt Gold 0.64 g/t 1.02 M oz
Indicated 49.8 Mt Silver 5.58 g/t 8.9 M oz
Inferred 40.6 Mt Gold 0.59 g/t 0.77 M oz
Inferred 40.6 Mt Silver 4.5 g/t 5.9 M oz
Total Resource 163.6 Mt Gold 0.65 g/t 3.42 M oz
Total Resource 163.6 Mt Silver 5.59 g/t 29.4 M oz

Commodity Production Costs:

CommodityUnits20172016
Total cash costs Gold USD 549 / oz   895 / oz  

Financials:

Units20172016
Revenue M USD 191.5   174.9  
Pre-tax Income M USD 39.5   -242.1  
EBITDA M USD 90.7   29.8  



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jan 10, 2023
....................... Subscription required ....................... Subscription required Subscription required Jan 10, 2023
....................... Subscription required ....................... Subscription required Subscription required Jan 10, 2023
....................... Subscription required ....................... Subscription required Subscription required Jan 10, 2023
....................... Subscription required ....................... Subscription required Subscription required Mar 1, 2023
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Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
Corporate Presentation 2022
Quarterly Report 2022
Year-end Mineral Reserves 2022
................................... Subscription required 2019
Annual Report 2018
Annual Report 2017
Technical Report 2013
Subscription required - Subscription is required.

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