Gold Fields Limited · JSE:GFI
Gold Fields — Technical Presentation (May 2010)
35 slides from Gold Fields's technical presentation, May 18, 2010
Slide 1: Tarkwa Gold Mine Analyst Visit
I 2 Tarkwa Gold Mine To be the gicbe! header in sustainable gold muning Analyst Visit 18" May 2010 (eB Fievos
Slide 2: West Africa is host to world class gold deposits
West Africa is host to world class gold deposits and a premier mining destination with a l long hi t history off mining i i ini Ghana Gh and d Mali. M li Gold G ld Fi Fields ld has h worldld class l assets t in i the th Tarkwa region and prides itself with a 15‐year history in Ghana. Our brand is st
Slide 3: Regional strategy aligned with 3-pillar Group strategy
Each region’s strategy is aligned with the 3‐pillar Group strategy of Securing the future, sweating ti our assetst and d growing i GGoldld Fi Fields. ld IIn W Westt Africa, Af i theth key k elements l t off securing our future are in the areas of safety, our social license to operate and optimising
Slide 4: Ghana production profile expected to grow
The production profile from the two operations in Ghana is expected to grow from 200,000 ounces to t about b t 250 250,000 000 ounces per quarter. t The Th hi higher h production d ti iis primarily i il due d tot the CIL plant expansion and the installation of a secondary crusher at Tarkwa and Daman
Slide 5: Tarkwa Gold Mine
—_— Tarkwa Gold Mine CB Fievos
Slide 6: Experienced, cohesive and stable management team
Tarkwa has an experienced, p , cohesive and stable management g team. 6
Slide 7: Tarkwa location and operations in South West Ghana
Tarkwa is located in South West Ghana and is easily accessible with an established infrastructure. The open‐pit surface operation currently exploits narrow, tabular auriferous conglomerates similar to those mined in the Witwatersrand Basin of South Africa. Mining is currently taking place from 6 pit
Slide 8: Historical overview of Tarkwa since acquisition
This slide depicts the historical overview of Tarkwa since Gold Fields’ acquisition of the mine. Worth noting is the increase in production since acquisition. In 2004 Tarkwa moved from contract mining to owner mining (OM), which it is now reaping the benefits of in terms of cost per ton. 8
Slide 9: Tarkwa reserves and resources
Tarkwa currently has 10.7 million ounces in reserves and 16.2 million ounces in resources. In addition, Tarkwa’s ore body is well understood allowing for optimal exploitation.
Slide 10: Tarkwa mining cost ranks in bottom percentile
At $1.70/t, Tarkwa ranks in the bottom percentile in the world in terms of mining costs.
Slide 11: Owner operated, high volume, grade driven operation
Tarkwa is owner operated and is a high volume, grade driven operation which employs selective mining. It is an automated mine and has world class mining technology at it disposal.
Slide 12: 100m tonnes a year and largest MARC contract in Africa
Tarkwa mines an average of 100m tonnes a year and has the largest MARC contract in Africa with an 85 strong fleet. Tarkwa’s life of mine extends to 2022.
Slide 13: Efficiency improvement strategies and tyre performance
Tarkwa has various efficiency improvement strategies in an effort to manage key cost drivers. A case in point is tyre performance. The slide depicts the improvement in hours achieved as well as tyres damaged over the past year. The target is 6,000 hours. 13
Slide 14: Load and Haul Efficiencies
Tarkwa Gold Mine Load and Haul Efficiencies 600 400 300 100 Jul09 = Aug-09 Sep-09 TPH Oct-09 Nov-09 Dec-09 Jan-10 Feb-10 Mar-10 Sao Apr-10 TPH planned at 472 TPH TPH = Tonnes per hour 14
Slide 15: Mining cost competitive relative to contract mining
At a mining cost of $1.70/t Tarkwa is competitive relative to contract mining. 15
Slide 16: Mining areas for the next year
This and the slides that follow indicate the mining area for the next year. 16
Slide 17: F2011 Operational Plan - Q2
F2011 Operational Plan Mining Area - F2011 Q2 Akon Underiap L. og ez 72 200 = i. Zz aa f 8 Green = Capita! Waste Cuthach Blue = Internal Waste Red = Ore Zones [Gouohgrrery 17
Slide 18: F2011 Operational Plan - Q3
F2011 Operational Plan Mining Area - F2011 Q3 J ane - Vga ee t a Akon Ridge Akon Underiap 2 z — 5 & 70N ne x = (S Green = Capital Waste Cutback Blue = Internal Waste Red = Ore Zones EE Fics 18
Slide 19: F2011 Operational Plan - Q4
F2011 Operational Plan Mining Area - F2011 Q4 ~ (S) Green = Capita! Waste Cutbach Biue = Internal Waste Red = Ore Zones
Slide 20: Cross section through the ore body
The cross section is a cut through the ore body illustrating its nature. It consists of a series of gold bearing pebbly units (ore) interspersed with barren sandstones (internal waste). These are capped by barren sandstones which has to be mined to expose the ore, this is capital waste. The definiti
Slide 21: The CIL Plant
Tarkwa Gold Mine The CIL Plant © 12Mtpa — OPTIMISED FACILITY LGo. ots Ficcos
Slide 22: CIL Plant Information
CIL Plant Information 5 ss SAG mun on mu eek a Dy “ aisshatit G = ‘3x Thickener Ented Carton Toone 4 is (wait Return Tank Sau " wash a we Ta Regeneration Kins 2x Elution . columns - = Tastings . go i B Tailings 1 Storage Facility Electrowinning cette 2 wxsastee 7 Tastings Tank iin... iy Talings 2 St
Slide 23: CIL Plant Milling Circuit
Tarkwa Gold Mine CIL Plant 12 Mtpa Milling Circuit + Operational cost driven down to ~US$ 8.50 per tonne + State of the art expert process control systems + Power now stable with new Sub Station in operation Overall plant recovery consistently above 97% 520 koz per annum consistent Gold Production M
Slide 24: Processing: CIL power supply stability
PROCESSING: CIL Power Supply Stability; New VRA Sub — Station Commissioned in Jan 2010 OUTAGES [NUMBER] OUTAGES [HOURS] Qi Qtrto Qu Qz Qtrto Qi Q3 at Qtr to Ctr az Qtr to Qtr as F2010 Variance F2010 Variance F2010 F2010 Variance F2010 Variance F2010 Actual Actual Actual Actual Actual Actual © Improv
Slide 25: North Heap Leach
Tarkwa Gold Mine North Heap Leach @ 9.845Mtpa — LOW COST FACILITY Sar Ficcos 25 25
Slide 26: North Heap Leach Process Flow
Tarkwa Gold Mine North Heap Leach Process Flow Tarkwa Gold Mine Heap Leach Flow Diagram / 0 ear oe ae UE © CEM Ficcos mS
Slide 27: North Heap Leach statistics
Tarkwa Gold Mine North Heap Leach statistics | 10 Mtpa Leaching Facility + Operational cost driven down to ~US$ 5.19 per tonne Overall plant recovery consistently above 75% | 246 kOz per annum consistent Gold Production t if Five Phases of stacking capacity * 113.4 Mt stacked to date * 1.233M Oz Gol
Slide 28: North Heap Leach Process Optimisation
Tarkwa Gold Mine North Heap Leach Process Optimisation = Optimisation of cyanide addition at phase IV to enhance recovery and reduce GIP = Installation of second cascade carbon column to reduce gold in the intermediate solution inventory " Further upgrading of ADR feed pumps and pipes = FY2011 stack
Slide 29: High Pressure Grinding Roller (HPGR) Project
Tarkwa Gold Mine High Pressure Grinding Roller (HPGR) Project SWEATING OUR ASSETS
Slide 30: HPGR project results to date
As mentioned before, the HPGR project forms part of the strategic pillar of sweating our assets. This technology is expected to yield increased recoveries of between 10% and 15% through increased fracturing of material. So far, tonnage processed is up 47% to 300,000tpm while production is up 34% as
Slide 31: High volume operation with healthy margins
Tarkwa is a high volume operation with the ability to maintain a reasonable cost structure and therefore, healthy margins.
Slide 32: Community relations and Cage Culture Project
Tarkwa is committed to healthy community relations and preserving the environment. This picture depicts the Cage Culture Project that is being championed by Tarkwa. 32
Slide 33: Community affairs and SEED programme
The community affairs function is based on an inclusive, participative relationship with all stakeholders. The primary drivers behind all projects are self‐sufficiency and sustainability. Community investment in the region is done by the Gold Fields Ghana Foundation, which is a charity registered wi
Slide 34: Agriculture focus for self-sufficiency
A key focus area is agriculture in terms of self‐sufficiency and sustainability. 34
Slide 35: Looking ahead: maintaining safety and production
Looking ahead, Tarkwa will strive to maintain its performance in areas such as safety and production. Further improvement will be achieved from business process re‐ engineering while continuing cohesive and inclusive stakeholder relationships. 35