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West Africa Region

Tarkwa has now fully transitioned to contractor mining and is well positioned to deliver sustained value, while the best long-term option for Damang to create future cash-flow is being realised through the implementation of the Damang Reinvestment project.

A joint venture with Asanko Gold was completed in July 2018, with Gold Fields acquiring 45% in the mine for approximately US$185M.

West Africa region
Mineral Resources       Mineral Reserves
16.0Moz*#       7.4Moz*#
* 90% attributable to Gold Fields
# Excludes Asanko gold mine
Asanko JV
Mining method   Open pit   Open pit   Open pit
Infrastructure   Two open pits and one Carbon in Leach (CIL) gold plant with a current capacity of 4.3Mtpa   Four open pits and one CIL gold plant with a current capacity of 13.5Mtpa   Three open pits and one CIL gold plant with current capacity of 5.4Mtpa
Mineralisation style   Hydrothermal (orogenic) and palaeoplacer   Palaeoplacer   Hydrothermal shear hosted
Mineralisation characteristics  
  • Hydrothermal mineralisation hosted within structural shears and fault zones
  • Confined to well-defined prospective structural belts
  • Mineralisation within pods with short-range predictability
  • Exploration and resource definition programmes required to further define controls on mineralisation and continuity
  • Palaeoplacer characteristics are the same as for Tarkwa
  • Mineralisation hosted within sedimentary conglomerates of the Tarkwaian Group
  • Laterally continuous with mid- to long-range predictability
  • Clear patterns of mineralisation governed by sedimentary characteristics
  • Exploration programmes ongoing to test near-mine palaeoplacer potential
  • Deposits are typically hydrothermal shear hosted in style and situated within the Kumasi basin within the Asankrangwa Gold Belt
  • Mineralisation is structurally hosted along several regional NE trending shears and within sandstone, siltstone and shale sedimentary packages
  • Most deposits have intrusive tonalitic-porphyritic granite dyke associations
  • Exploration programmes are ongoing to identify strike and depth extensions to existing ore bodies, and to profile new opportunities along these well-defined structural pathways

For more information on the operations/projects, view the online 2018 Mineral Reserves and Resources Report