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Ghana
Chirano Mine

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 Location:
94 km SW from Kumasi, Ghana

  Address:
P.O. Box 57
Bibiani
Ghana
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit & Underground
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
  • Sub-level caving
  • Longhole open stoping
  • Dry waste backfill
Production Start...
Mine Life2026
The Chirano gold mine started production in October 2005 with a surface mining operation from three open pits. Surface operations stopped at the end of the second quarter of 2017. Since then, gold production has been primarily from three underground mining operations, until the second quarter of 2019 when surface operations re-commenced. To date, three additional underground mines have been added bringing the total number of underground mines operated by Chirano to six.
Latest NewsAsante Gold Announces Amended Terms for Second Tranche Payment for Chirano Gold Mine     February 13, 2023


Owners

Source:
CompanyInterestOwnership
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
  • Mesothermal


Summary:

The Chirano gold deposits can be described as epigenetic, mesothermal gold deposits, demonstrating a strong structural control and a brittle structural style. They are hosted by mafic volcanics and granite, ranging from stacked parallel veinlet systems to vein stockworks, breccias and cataclasites. The veinlets are dominated by quartz, with lesser ankerite, calcite, albite and traces of pyrite and hematite. The deposits show varying degrees of ankerite-albite-muscovite-pyrite alteration superimposed on earlier hematite alteration.

The deposits occur close to a major fault (the Chirano Shear), and is considered likely that any new deposits found will also be closely associated with faulting. In particular, individual deposits are often closely associated with small dextral jogs in the host structure. Although the currently known gold deposits are in granite, there are also strong gold anomalies in Birimian metasediments elsewhere within the mine area, which require concerted follow-up exploration.

The deposits range in strike length from 150 meters to 700 meters, and range in thickness from a few meters over 70 meters. They vary from rather tabular (Obra, Sariehu, Suraw) to more pipe-like (Tano and Akoti North) morphologies. The longer, the more tabular bodies generally comprise at least two shorter lenticular shoots, such as the Obra main and north lenses. These lenses may be separated by a small dextral jog such as those at Obra and Sariehu. Within th ........


Mining Methods

  • Truck & Shovel / Loader
  • Sub-level caving
  • Longhole open stoping
  • Dry waste backfill


Summary:

Chirano is an open-pit and underground operation located in southwestern Ghana, approximately 100 kilometres southwest of Kumasi, the country’s second largest city. Chirano includes the following deposits: Akwaaba, Kolua, Suraw, Akoti, Paboase, Tano, Obra, Sariehu and Mamnao.

The Chirano gold mine started production in October 2005 with a surface mining operation from three open pits. Surface operations stopped at the end of the second quarter of 2017. Since then, gold production has been primarily from three underground mining operations, until the second quarter of 2019 when surface operations re-commenced. To date, three additional underground mines have been added bringing the total number of underground mines operated by Chirano to six.

Chirano mines are utilizing longitudinal modified sub-level caving mining method and a long hole open stoping mining method with waste rock backfill.


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityUnits202120202019201820172016
Gold Equivalent oz  ......  Subscription required  ......  Subscription required  ......  Subscription required226,699246,027211,954
All production numbers are expressed as metal in doré.
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Operational Metrics:

Metrics202120202019201820172016
Ore tonnes mined  ......  Subscription required  ......  Subscription required2,569 kt2,013 kt2,410 kt2,722 kt
Annual milling capacity  ......  Subscription required  ......  Subscription required3.5 Mt3.5 Mt3.5 Mt3.5 Mt
Tonnes processed  ......  Subscription required  ......  Subscription required3,457 kt3,506 kt3,438 kt3,458 kt
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Reserves at December 31, 2021:
Mineral reserves Cutoff grade: 0.29 to 1.90 g/t Au.

CategoryTonnage CommodityGradeContained Metal
Proven 5,600 kt Gold 1.5 g/t 271 koz
Probable 10,160 kt Gold 2.2 g/t 718 koz
Proven & Probable 15,750 kt Gold 2 g/t 989 koz
Measured 9,206 kt Gold 1.4 g/t 422 koz
Indicated 18,894 kt Gold 1.2 g/t 712 koz
Measured & Indicated 28,100 kt Gold 1.3 g/t 1,134 koz
Inferred 6,048 kt Gold 1.9 g/t 372 koz

Commodity Production Costs:

CommodityUnits202120202019201820172016
Cash costs (sold) Gold Equivalent USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 768 / oz   797 / oz   921 / oz  
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Financials:

Units202120202019201820172016
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 24   46.6   46.6  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 286   317.6   258.5  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required -6.2   -27.5   -58  
Gross profit M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required -10.5   -21.1   -41.1  
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Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
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Staff:

EmployeesContractorsYear
Subscription required Subscription required 2021
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Subscription required Subscription required 2018
Subscription required Subscription required 2017
Subscription required Subscription required 2016

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
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Annual Information Form 2018
Financial Review 2018
Management Discussion & Analysis 2018
Press Release 2018
Year-end Mineral Reserves 2018
Annual Information Form 2017
Financial Review 2017
Management Discussion & Analysis 2017
Year-end Mineral Reserves 2017
Annual Information Form 2016
Annual Report 2016
Other 2016
Press Release 2016
Annual Report 2014
Press Release 2014
Technical Report 2009
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News:

NewsDate
Asante Gold Announces Amended Terms for Second Tranche Payment for Chirano Gold Mine February 13, 2023

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