OPERATIONS Ghana

Ghana

Gold Fields’ operations in Ghana comprise the Tarkwa and Damang gold mines in the Western Region.

In 2023, Gold Fields announced it had entered into negotiations with the government of Ghana and AngloGold Ashanti (AGA) to form a JV to combine the adjacent Tarkwa and Iduapriem mines. This JV will ultimately result in 60% attributable ownership to Gold Fields, 30% attributable to AGA and 10% free carry to the government of Ghana. While Gold Fields and AGA continue to work toward this JV, no agreements have been finalised yet and all Tarkwa’s Mineral Resources and Mineral Reserves are reported on the basis of a standalone Tarkwa mine, 90% attributable to Gold Fields.

The Damang Reinvestment Project (DRP) is scheduled for depletion in 2025, with the last two years focused on processing stockpiles. Ex-pit mining at Damang was completed in 2023.

OPERATIONAL PROFILE
      Damang   Tarkwa  
  Mining method   Open pit   Open pit  
  Operational infrastructure   Damang’s Mineral Reserves are currently made up of only stockpiles while nine non-operational open pits comprise the Mineral Resources. Infrastructure includes a centralised administrative office, engineering workshops and residence villages.   Four large open pits currently exploit the narrow, stacked, auriferous conglomerates. Tarkwa has an ore stockpile and “spent ore stockpile” on the south heap leach (SHL) pad included in Mineral Reserves. The spent ore stockpile comprises material that has been leached but has been evaluated to have residual gold that could be liberated through further grinding and processing. Tarkwa has a centralised administrative office, engineering workshops and residence villages.  
  Mineral processing and TSF   The processing plant treats predominantly fresh ore, comprising a three-stage crushing circuit, SAG/ball mill with a pebble crushing circuit, a gravity recovery circuit and a CIL gold recovery circuit. The plant has been optimised to process 4.6Mtpa.

Deposition of tailings currently occurs on the Far East TSF (FETSF), which was commissioned in January 2018. Construction commenced on the third stage raise in Q4 2021 and was completed in Q3 2022. This increased the embankment crest elevation from 985mRL to 990mRL. Construction of the downstream waste rock shell in preparation for the stage four wall raise has started, which will be the final raise. The FETSF has an ANCOLD consequence classification of High C. The remaining storage capacity of the FETSF is ~11Mt.

The East TSF (ETSF) was constructed as a combined TSF and waste dump using compacted earth fill and fresh waste rock for the embankment construction. Closure deposition of tailings into the ETSF commenced in early 2017 until January 2018, when deposition ceased.

The South TSF (STSF), also with earth fill embankments, has been closed and is fully rehabilitated. The ETSF and STSF have an ANCOLD consequence classification of High B and Significant, respectively.
  Ore is processed through a conventional gold recovery plant, consisting of two gyratory crushers with one gyratory crusher followed by an additional two-stage crushing circuit feeding a SAG/ball mill circuit, thickeners and twin CIL circuits. Gold is recovered from a gravity recovery circuit and the CIL carbon elution circuit pregnant solution by electrowinning and smelting in an induction furnace. The current plant capacity is 14Mtpa.

In the short term, LOM tailings deposition requirements are met by wall raise sequences on TSFs 1, 2 and 5. In the longer term, LOM tailings deposition requirements will be catered for by additional raises at TSFs 1, 2 and 5. LOM TSF requirements are reviewed and updated annually by the EoR. The remaining LOM storage capacity of the Tarkwa TSF complex is ~155Mt (end 2034).

TSF 3 is decommissioned and is in the process of being closed. The ANCOLD consequence classifications for TSFs 1, 2 and 3 are High A. The consequence classification for TSF 5 is High B.
 
COUNTRY INFORMATION

Tarkwa and Damang gold mines located in Ghana

Gold Fields’ operations in Ghana comprise the Tarkwa and Damang gold mines, in which the Government of Ghana owns a 10% free-carry shareholding. Gold Fields divested its 45% interest in the Asanko gold mine to our JV partner Galiano Gold in March 2024. Tarkwa continues to be a long-life surface mining operation with Mineral Reserve estimates supporting a 12-year LOM, whereas Damang is scheduled to cease operations in 2027 once the stockpiles have been processed. Gold Fields is looking at options for this mine.

Salient points

ATTRIBUTABLE MINERAL RESERVES   ATTRIBUTABLE MINERAL RESOURCES (EMR)
4.5Moz GOLD
Proved and probable
  4.5Moz GOLD
Measured and indicated
    0.7Moz GOLD
Inferred

* 90% attributable to Gold Fields and excludes Asanko joint venture (JV) 45% attributable to Gold Fields

GHANA MINERAL RESOURCES AND RESERVES 2023 PDF 9MB

 

DETAILS FOR OUR GHANA KEY STAKEHOLDERS CLICK HERE – PDF 3MB

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