The Australian mines continue to benefit from sizeable annual investments in extensional and brownfield exploration (US$63.3M in 2018) with Agnew, Granny Smith and St Ives all increasing Resources and Reserves, net of depletion.
The Gruyere joint venture (JV) mine commenced production at the end of June 2019, with commercial production achieved at the end of September 2019. The plant ramp-up is expected to continue for the rest of 2019.
|Mineral Resources||Mineral Reserves|
|>> The Mineral Resources for the region grew by 7% net of depletion||>> The Mineral Reserves for the region post depletion grew by 4%|
|* 100% attributable to Gold Fields|
|FSE project – 40% Attributable
|Gold and copper deposit in the Philippines||19.8Moz gold and 9,921Mlb copper|
|Mining method||Open pit and underground||Underground||Underground||Open pit|
|Infrastructure and mineral processing||Two main open pits, three underground mines with a new major UG expansion planned in 2020. One gold processing plant with a throughput capacity of 4.7Mtpa consisting of a primary gyratory crusher, a single-stage Semi Autogenous Grind (SAG) mill with a gravity circuit and five-stage Carbon in Pulp (CIP) circuit. Gold is recovered by electro winning.||Two underground complexes and one processing plant, with a capacity of 1.3Mtpa consisting of a three-stage crushing circuit, two-stage milling circuit, gravity circuit and CIP circuit.||One active underground mine. A processing plant with a capacity of 3.5Mtpa consisting of two crushing circuits, SAG and ball mills, leach and CIP circuits and a tailings retreatment circuit. However, it is mine constrained and currently operates at 1.5Mtpa on a campaign milling basis.||The main Gruyere open pit commenced mining in Q4 2018. The processing plant, with a capacity of 8.2Mtpa, consisting of single stage crush and SABC1 circuit with pebble crushing was commissioned in mid-2019. The plant achieved commercial production at the end of September 2019 and ramp-up to steady state is underway.|
|Tailings storage facility (TSF)||Tailings stored in two paddock-type facilities and a new in-pit TSF at Leviathan, which will meet current life-of-mine (LoM) requirements.||TSF 4 established and commissioned in 2017, projected to receive tails, including stage 4 approvals, until 2025. Songvang in-pit tailings commenced in 2018 with total capacity sufficient for LoM needs.||The TSF capacity is projected to last until 2021. TSF 3 had approval to complete a further lift during 2018 providing 4Mt capacity. Evaluation of further TSF options for an extended LoM are in progress.||Construction of main TSF facility was completed in 2018 in preparation for processing commencement in 2019. The TSF capacity is projected to last until 2030 for all planned mining.|
|Mineralisation style||Orogenic greenstone hosted (hydrothermal-style).
Mineralisation typically structurally controlled and hosted by shear and fault zones and confined to well-defined prospective structural belts.
|Mineralisation characteristics||Mineralisation zones discontinuous with short-range predictability.||Mineralisation zones with moderate to long-range geological continuity and short-range grade continuity.|
|Exploration||Ongoing exploration programmes required to drive discovery, define the mineralisation controls, establish continuity and convert Mineral Resources to Mineral Reserves.|
For more information on the operations/projects, view the online 2018 Mineral Reserves and Resources Report