Damang Gold Mine

21
Damang Gold Mine Technical Short Form Report 31 December 2012

Transcript of Damang Gold Mine

Page 1: Damang Gold Mine

Damang Gold MineTechnical Short Form Report31 December 2012

Page 2: Damang Gold Mine

1. OverviewDamang Gold Mine is owned and operated by Abosso Goldfields

Limited (AGL), a Ghanaian-registered company. With Gold Fields’

acquisition of IAMGold’s indirect 18.9% stake in the Damang Gold

Mine in June 2011 Gold Fields now owns 90% of the issued

shares of AGL, with the Ghanaian government owning the

remaining 10% free carried interest. The Damang Gold Mine

consists of two mining leases, namely the Damang mining lease

and the Lima South mining lease (8,111 hectares), and has

four prospecting licences that cover a combined total area

of 25,454 hectares.

The Damang Gold Mine is located in south-western Ghana near

the southern end of what is commonly referred to as the Tarkwa

Basin, 300 kilometres by road west of Accra, the capital of

Ghana. The mine exploits oxide and fresh hydrothermal

mineralisation in addition to Witwatersrand-style palaeoplacer

gold. The hydrothermal mineralisation is located in Tarkwaian

sediments and is the only deposit of its kind located on the

eastern side of the Ashanti Belt in south west Ghana. Damang’s

main ore body is located close to the closure of an antiform, while

all other known palaeoplacer mineralisation is located on the

eastern and western limbs of the anticline.

The Damang plant currently processes ~ 4.7 Mtpa from a blend

of approximately 5% oxide ore and 95% fresh ore but going

forward it is planned to treat 100% fresh ore. The ore is sourced

from various open pit mining operations and existing surface

stockpiles. Process feed for the 12-month period to 31 December

2012 comprised 4.4 Mt, at a yield of 1.17 g/t for 166 koz.

This Technical Short Form Report reflects the latest Life of Mine

(LoM) plan input parameters, together with an updated Mineral

Resource and Mineral Reserve statement. The declared Mineral

Reserve as at 31 December 2012 has increased by 641 koz of

gold when reconciled against the December 2011 statement,

predominantly due to the increased pit-shell size at Greater

Damang.

All Mineral Resource and Mineral Reserve figures reported

are managed unless otherwise stated. Mineral Resources are

inclusive of Mineral Reserves.

Geographic locationDamang locality plan with mining leases magnified

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1Gold Fields – Damang Gold Mine – Technical Short Form Report 2012 �

Page head

Geographic location IFC

1. Overview IFC

2. Asset fundamentals Page 2

3. Operating statistics Page 3

4. Geological setting and mineralisation Page 4

5. Mining Page 6

6. Projects Page 7

7. Mineral processing Page 8

8. Sustainable development Page 9

9. Mineral Resources and Mineral

Reserves Page 10

10. Competent Persons Page 14

11. Key technical staff Page 14

12. Brief history Page 17

Cover image:Open pit mining operations at Damang Gold Mine, Ghana

Note: For abbreviations refer to page 27 and for glossary of

terms refer to page 28 – “Mineral Resources and Mineral

Reserves Overview 2012”.

��Aerial view of sustainable rehabilitation programme at Damang

Contents

destination and host to world-class

ld d osits. The Daman Gold

and contribute to Gold Fields’ vision:

.

WWest Africa is a premier mining West Africa is a premier mining

destination and host to world-classdestination and host to world-classdestination and host to world-class

gold d osits. The Damang Gold gold deposits. The Damang Gold gold deposits. The Damang Gold

Mine in particular will leverage this Mine in particular will leverage this Mine in particular will leverage this

and contribute to Gold Fields’ vision:and contribute to Gold Fields’ vision:

“To be the lobal leader in “To be the global leader in “To be the global leader in

sustainable gold miningsustainable gold mining...”””

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2 � Gold Fields – Damang Gold Mine – Technical Short Form Report 2012

2. Asset fundamentals

Prepared by Gold Fields Limited in compliance with the South African Code for the Reporting of Exploration Results, Mineral Resources and Mineral Reserves (2007 SAMREC Code)

Effective date 31 December 2012

Source of information This Technical Statement is a summary of the December 2012 Damang Competent Persons Report (CPR)

Personal inspection Personal inspection is conducted by the Competent Persons as listed, who are full-time employees of Gold Fields Limited

Independent review Information reported in this declaration is as reviewed by internal consultants as at 31 December 2012. Damang has been informed that the review identified no material shortcomings in any process by which the Mineral Resources and Mineral Reserves were evaluated

General location Damang is located in south-western Ghana, approximately 300 kilometres by road west of Accra, the capital, at latitude 5° 11’ N and longitude 1° 57’ W. The Damang concession lies to the north of and joins the Tarkwa concession, which is located near the town of Tarkwa. The area is served with good access roads with established infrastructure, and a main road connects the Mine to the port of Takoradi, some 90 kilometres to the south-east

Climate A tropical climate, with average monthly temperatures between 21°C and 32°C, is characterised by two distinct rainy seasons from March to July and September to November. Average annual rainfall near the site is 2,030 millimetres. Although there may be minor disruptions to operations during the wet season, there is no operating or long-term constraint on production due to climate

Licence status and holdings

The Damang concession covers a total area of 25,454 hectares. All necessary statutory mining authorisations and permits are in place for the Damang Mine Lease, and Abosso Goldfields is entitled to mine all material falling within the lease. Abosso Goldfields holds a mining lease in respect of the Damang Mine dated 19 April 1995, as amended by an agreement dated 4 April 1996. This lease expires in 2025, but is renewable under its terms and the provisions of the Minerals and Mining Law, by agreement between Abosso Goldfields and the Government of Ghana

Operational infrastructure

The Damang plant processes oxide and fresh ore, which is sourced from four open pit mining operations and existing surface stockpiles, located on the Damang Mine Lease. The current plant name-plate throughput is 5.1 Mtpa, with an approximate ore blend of 60:40 fresh:oxide

Deposit type The Damang ore body is hosted by a north to northwesterly plunging antiform, developed within Tarkwaian sediments. The main Damang pit is located close to the closure of the antiform, and all other known mineralisation is located on the east and west limbs of the Damang anticline. The mine exploits oxide and fresh hydrothermal mineralisation in addition to Witwatersrand-style, palaeoplacer mineralisation

Life of Mine (LoM) It is estimated that the current Mineral Reserve will be depleted in 2028 (16 years)

Environmental/Health and Safety

Damang retained its OHSAS 18001:2007E (Safety Management system) certificate following the re-certification audit conducted in June 2012. Damang is ISO 14001-compliant and holds regulatory Certificates for Environmental Compliance. Permits have also been issued for new infrastructure at the Huni Waste Dump and Far East Tailings Storage Facility

Reporting codes Gold Fields reports its Mineral Resources and Mineral Reserves in accordance with the 2007 SAMREC Code, The South African Codes for the Reporting of Mineral Asset Valuation (2009 SAMVAL Code) and other relevant international codes such as the United States Securities and Exchange Commission (SEC) Industry Guide 7, the Joint Ore Reserves Committee (JORC 2012) Code and the National Instrument (NI) 43-101. The Mineral Resources and Mineral Reserves are underpinned by an appropriate Mineral Resource management process and protocol to ensure adequate corporate governance in respect of the Sarbanes-Oxley Act

Aerial view of the Damang Pit Visible gold in a rock specimen from the Damang Pit

Open pit mining operation – dump truck

Run of mine stockpile, Damang Gold Mine

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3Gold Fields – Damang Gold Mine – Technical Short Form Report 2012 �

3. Operating statistics

Historic

performance UnitsDec

2012

Dec2011

Dec20101

June2010

June2009

Open pit mining

Total mined kt 33,502 23,515 7,144 12,529 19,460

– Waste mined kt 29,192 18,735 4,962 8,658 15,058

– Ore mined kt 4,310 4,780 2,182 3,867 4,402

Mined grade g/t 1.53 1.76 1.88 1.6 1.6

Strip ratio (tonnes) waste:ore 6.8 3.9 2.3 2.2 3.4

Processing

Mill tonnes kt 4,416 4,942 2,491 5,028 4,991

Mill head grade g/t 1.29 1.49 1.57 1.38 1.34

Yield g/t 1.17 1.37 1.46 1.28 1.25

Plant recovery factor % 90.2 92.0 93.3 92.9 93.1

Gold produced

Total gold productionkoz 166 218 117 207 200

kg 5,174 6,772 3,637 6,451 6,233

Gold sold koz 166 218 117 207 200

Financials

Operating cost US$/oz 946 651 632 630 661

Total cash cost US$/oz 918 701 636 660 661

Capital expenditure US$ million 114.42 87.82 56.3 29.8 16.48

Notional cash expenditure (NCE) US$/oz 1,630 1,056 1,114 774 743

General

Total Employees Costed (TEC) number 1,656 1,588 1,423 1,478 1,649

Mineral Reserves Mt 76.1 61.7 40.5 41.9 36.1

Mineral Reserves Head Grade g/t 1.67 1.71 1.60 1.58 1.60

Mineral Reserves Moz 4.1 3.4 2.1 2.1 1.8

Expected Life of Mine years 16 13 9 9 9

1 Figures shown represent the six months to 31 December 2010.2Excluding Greater Damang capital drilling.

Rounding off of figures presented in this report may result in minor computational discrepancies. Where this occurs it is not deemed significant.

Night shift open pit mining operations at Damang

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4. Geological setting and mineralisation

The Damang ore bodies are located within the Tarkwaian

sediments, which form a significant portion of the stratigraphy

of the Ashanti Belt in southwest Ghana. The Ashanti Belt is a

north-easterly striking, broadly synclinal structure made up of

Lower Proterozoic sediments and volcanics, underlaid by the

metavolcanics and metasediments of the Birimian system.

The Tarkwaian unconformably overlies the Birimian, and is

characterised by lower intensity metamorphism and the

predominance of coarse-grained, immature sedimentary units.

The Damang Gold Mine exploits oxide and fresh hydrothermal

mineralisation in addition to palaeoplacer mineralisation. The

hydrothermal mineralisation is located in Tarkwaian sediments

and is the only deposit of its kind located on the eastern side

of the Ashanti Belt in south-west Ghana.

Local geologyThe Damang ore body is hosted by a north-easterly plunging

antiform, developed within Tarkwaian sediments. The main

Damang pit is located close to the closure of the antiform,

and all other known palaeoplacer mineralisation is located on

the east and west limbs of the Damang anticline.

The stratigraphy at Damang is primarily within the Tarkwaian

Group and comprises a large-scale fining upwards sequence

of clastic sediments, interrupted by up to four major gold-

bearing quartz-pebble conglomerate horizons. This sequence

unconformably overlies a mixed Birimian Supergroup

The Damang tenement boasts a strong pipeline of exploration targets, from conceptual level to advanced projects.

Geology of south western Ghana

basement, comprising volcaniclastic deposits, minor fine-

grained clastic sediments and black shales.

The area is intruded by a number of igneous intrusions, the

most common being dolerites that occur as narrow dykes

and sill-like bodies along contacts on either side of the

Tarkwa phyllite, a particularly fine-grained pelitic unit in the

upper Tarkwaian. Another intrusive body, the so-called diorite

porphyry, occurs sporadically along the boundary between

the Birimian and the Tarkwaian.

Palaeoplacer mineralisationThere are three gold-bearing conglomerate horizons

recognised on the western limb of the Damang anticline.

From footwall to hangingwall, these are known as the Star/

Composite, Malta/Breccia and Gulder Reefs. There are also

three gold-bearing conglomerate horizons recognised on the

eastern limb, namely the Lima, Kwesie-K1 and Kwesie-K2

Reefs. These conglomerate horizons are separated by

poorly-mineralised sandstone units.

The reefs are usually characterised by a fining upwards

sequence of poorly to moderately sorted, clast-supported

polymictic conglomerates. However, local variations are

observed where the conglomerate domain is interbedded

with fine to coarse grained, poorly sorted sandstones. The

Star/Composite, Malta/Breccia and Gulder Reefs on the west

limb and the Lima, Kwesie-K1 and Kwesie-K2 Reefs on the

east limb of the Damang anticline contain higher gold grades

than the poorly mineralised sandstone units, which separate

the reefs. The conglomerate reefs may contain between

1.3 and 1.5 g/t gold, and the poorly mineralised sandstone

units usually contain between 0.1 and 0.2 g/t gold.

Hydrothermal mineralisationHydrothermal gold mineralisation at Damang occurs in pyrite

and pyrrhotite alteration selvages, which are usually less than

Local geology for Damang lease area

Takoradi

ACCRA

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5Gold Fields – Damang Gold Mine – Technical Short Form Report 2012 �

Resource models, which are generated following the

completion of this drilling, are used to establish more robust

production schedules and enable more accurate and

confident grade and tonnage reconciliation.

Damang maintains rigorous quality assurance and quality

control (QA/QC) protocols on all of its exploration

programmes, using leading industry practice in data

acquisition, reputable laboratories for analytical data, and

ensuring sign-off by Competent Persons under the 2007

SAMREC Code. QA/QC programmes are the same for

samples from both hydrothermal and palaeoplacer deposits

and are intended to monitor routine sampling and laboratory

performance to control and eliminate possible errors in

sample preparation and analysis. The results of laboratory

internal QA/QC assays provide secondary validation to

accompany the AGL quality control programme.

Exploration drilling outside the current pit designs has been

curtailed for 2013, as the focus shifts to advanced grade

control and resource infill drilling to increase the confidence and

predictability in the Damang ore-body over the next two years.

Profiles depicting stratigraphic variance across property

one metre wide and located immediately adjacent to

en-echelon quartz veins. Gold is also associated with

accessory vein minerals such as carbonate, muscovite,

tourmaline, ilmenite and apatite. These alteration zones are

often linked and may result in significant volumes,

characterised by intense veining and gold mineralisation.

Damang is unique in Ghana by virtue of hydrothermal

mineralisation hosted in the quartzites of the Tarkwaian

banket footwall, instead of the metavolcanics and

metasediments of the Birimian Basement as seen at Prestea,

Bogoso and Obuasi. To date no significant hydrothermal

mineralisation has been encountered in the Birimian

lithologies at Damang.

Exploration and resource definition drillingExploration drill programmes are designed to assess the

magnitude and style of mineralisation. Reverse Circulation

(RC) drilling, using a 100 x 100 metre grid, is usually

employed for initial exploration drill-testing of both

palaeoplacer and hydrothermal styles of mineralisation. While

more costly, diamond drilling is minimised in the initial

exploration stages, it is used to establish stratigraphic and

structural relationships and allow samples to be collected for

metallurgical test work.

Exploration drilling is also done outside optimised pit shells to

assess the magnitude, grade distribution and continuity,

geotechnical engineering parameters and the metallurgical

character of the mineralisation. Follow-up drilling is

conducted depending on the results of the initial drilling.

Exploration objectives are specified in the operation’s

business plan and Mineral Reserve replacement strategy. Infill

and Mineral Resource conversion drilling, increases the level

of confidence in a resource estimate by more accurately

defining mineralisation boundaries, grade continuity and

distribution, as well as internal waste boundaries. Mineral

Exploration drilling and expenditure

31 December 2012 31 December 2011

Operation

Metres

drilled

US$

(million)

Metresdrilled

US$(million)

Damang Gold Mine 55,353 11.895 78,908 15.452

Exclusive of grade control drilling except where it is included in the capital budget.

A3, A1

AFc

WESTERN LIMB EASTERN LIMB

Me

tre

s

Breccia

Composite

G

CDE

Gulder

Malta

Star

K 2

K 1

Lima

Horizontal not to scale

0

10

20

30

40

50

60

70

TARKWAABOSSO

DEEPS

CHIDA

SOUTH

CHIDA

CENTRALCHIDA

TOMENTO

EAST

TOMENTO

NORTH

LIMA /

KWESIE

LIMA

SOUTH

BONSA

NORTH

BONSA

SOUTH

Resource definition drilling at Greater Amoanda Project

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6 � Gold Fields – Damang Gold Mine – Technical Short Form Report 2012

Mining at Damang is carried out by conventional open pit

methods and has been based on an owner-operator model

since March 2011. Load and haul is undertaken using a

standard truck-shovel operation, with excavators in backhoe

configuration (one Bucyrus RH120E, three Bucyrus RH90Cs

and two Liebherr 984s). The haulage fleet consists of

26 Caterpillar 777F dump trucks, each with an average

payload capacity of 100 tonnes. The current equipment

fleet has a primary excavation rate of approximately 800 to

1,000 kBCM per month. Off-highway trucks haul ore to the

Run of Mine (RoM) pad and waste dumps. A fleet of tipper

trucks, operated by Engineers and Planners Limited, reclaims

stockpiled ore and transports it to the treatment plant.

Mining methods

Consistent with the current production schedule, mining is

carried out seven days per week, three shifts per day. The

morning, day and night shifts each last for nine-and-a-half

hours, with overlaps between the shifts.

Ancillary equipment includes bulldozers, graders, water

trucks and service truck vehicles which support the drill-and-

blast and haulage operations with vehicle, road and bench

maintenance plus dust and erosion control.

Fresh rock and transitional zones were traditionally drilled and

blasted in six-metre lifts, with excavation in three-metre

flitches. However, nine-metre and twelve-metre hole drilling

and blasting are now used as they optimise equipment use

and explosive consumption. Conventional (Nonel) detonators

are used in both fresh and oxide material. Oxide material,

which cannot be “free-dug”, is blasted using lower powder

factors. Waste material is hauled to planned dumps that are

located close to the pit exit.

AGL has a progressive reclamation plan in which inactive

areas are immediately rehabilitated through contouring and

replacement of topsoil, seeding, planting and fertilisation.

Damang Pit

Oxide ore is selectively mined to provide incremental feed to

the mill. The Rex pit, which is located 15 kilometres to the

south of the treatment plant and previously supplied oxide

ore, has been replaced by the Huni pit, located one kilometre

from the treatment plant. The haul roads are designed for

CAT 777F trucks. For double lane traffic their minimum width

is 23 metres and includes a drainage ditch with safety berm.

For single-lane traffic, a minimum width of 15 metres is used.

Mine planning and scheduling

The Mineral Resource, based on the Composite IK resource

modeling technique, forms the basis for subsequent design,

planning and extraction scheduling, incorporated into the

LoM plan. In the majority of instances, this is completed using

a combination of commercial software packages.

A detailed (one-year) operating and capital cost budget is

produced for all operational plans and, where appropriate,

extended for the LoM production schedule. The operational

plan is scheduled on a monthly basis, using zero-based

costing. Of critical importance is the utilisation of historically

achieved data for productivity and operating costs. All capital

projects are ranked and prioritised to maximise capital

efficiency and return on investment.

Optimisation software uses economic parameters and

physical constraints to generate a series of nested pits for

open pit planning. An optimal shell is then selected from this

series and detailed design confirms the mineability of the

optimised shell. The process is repeated until an acceptable

level of correlation is achieved between the optimised shell

and detailed design. Pit design is crucial for keeping strip

ratios in line with optimisation results, particularly given the

relatively small dimension of the pits, the characteristics of

the ore bodies and the size of the equipment.

Standard mine planning and design software used include:

�� Whittle 4X to derive the optimal economic pit shell;

�� Datamine® and/or MineSight® for the detailed

engineering and design work on the optimised pit shells;

�� Talpac® for haulage studies to determine cycle times and

fleet requirement; and

�� Xpac® for scheduling.

Mine planning is based on three-dimensional block models of

in situ mineralisation. Allowances are made for minimum

mining widths, dilution and ore loss appropriate to the mining

method under consideration. Historical performance

measures are used to determine these modifying factors.

Infrastructure, waste disposal and ore stockpile management

requirements are incorporated into the planning process.

5. Mining

The Damang plant processes oxide and fresh ore, which is sourced from three open pits and

existing surface stockpiles, located on the Damang Mine lease.

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7Gold Fields – Damang Gold Mine – Technical Short Form Report 2012 n

6. Projects

Re-interpretation of the entire tenement holding has highlighted a number of conceptually prospective target areas; however, the Greater Damang Extension Programme will be the key focus.

Two parallel exploration programmes are currently running at Damang. The primary project is the Greater Damang Extension programme and is jointly administrated and executed by Abosso Goldfields Limited and the Growth and International Projects group. The other exploration programme falls under the near mine exploration team which has five key projects:

Greater Damang Programme■■ Greater Damang Project – this comprises work in and

around the Damang pit as well as on the extensions to the Damang Cutback (Huni North, Juno, Tamang and Kwesi). The focus is on identifying where potential exists for both fresh palaeoplacer and hydrothermal mineralisation, along a strike length of some 3.5 kilometres and beneath the currently modelled pit shells. The potential beneath the pit shells has been proved and resource conversion drilling continued in 2012. The Greater Damang Phase III drilling was completed during 2012 and has addressed gaps in the resource model, provided geotechnical data and facilitated mineralogical work.

Greater Damang Project

RCmetres

DDmetres

Total metres

Resource infill drilling 7,414 16,944 24,358

Geotechnical drilling 592 2,190 2,782RC – Reverse circulation.DD – Diamond drilling.

Near Mine Exploration Programme■■ The Greater Amoanda Project – this focuses on the

1.5-kilometre-long corridor between the Amoanda and Tomento East pits. Its aim is to add to the 211 koz Mineral Reserves which are delineated in the 400 metres immediately north of the Amoanda pit, towards the Tomento East pit. During 2012, the drill spacing in the corridor area was reduced to a 40 x 40 metre pattern to allow resource estimation to be carried out. The infill drilling added 63,679 gold ounces at US$50/oz.

Greater Amoanda Project

RCmetres

DDmetres

Total metres

Resource infill drilling 5,426 12,116 17,542

Geotechnical drilling 615 2,192 2,807

■■ The Greater Rex Project – drilling of resource in-fill holes was put on hold due to the importance of the Greater Damang Project.

■■ The Bonsa Hydrothermal Project – earlier exploration on the Bonsa River Forest Reserve Prospecting License (PL) concentrated on paleoplacer mineralisation in the northern portion of the PL, with only limited exploration undertaken

in the southern portion, where the Bonsa Hydrothermal Project is located. A recent project review identified the Bonsa Hydrothermal Project as one of the best ranked targets on the AGL PL’s. The target area is structurally complex and underlain by the banket footwall quartzite, which favours the development of hydrothermal ore bodies. During 2012, 15 diamond drill holes were drilled to test various structural contacts on the project for gold mineralisation. Assay results are outstanding.

Bonsa Hydrothermal

RCmetres

DDmetres

Total metres

Greenfields exploration 0 2,520 2,520

■■ Sterilisation drilling of the proposed new plant site was completed in July 2012 and 31% of the Huni Waste Rock Dump sterilisation holes have been completed.

Sterilisation DrillingRC

metresDD

metresTotal

metres

Proposed Plant Site sterilisation 2,250 0 2,250

Huni Waste Dump sterilisation 3,060 0 3,060

■■ The Subiri, Wassa Breman and Epieso PL’s were renewed in May 2012.

Resource definition drilling – Bonsa Hydrothermal Project

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8 � Gold Fields – Damang Gold Mine – Technical Short Form Report 2012

7. Mineral processing

The Damang milling circuit was commissioned in November

1997 with a design throughput of 3.0 Mtpa. A number of

modifications and optimisations are planned to increase the

annual throughput to about 5.1 Mtpa with a 100% fresh ore

feed. The current annual throughput is 4.7 Mtpa; but it is

expected to decrease to 4.6 Mtpa in the short term due to

the feed blend changing to 100% fresh, pending the

modifications.

An anticipated change to the ore blend from the pit (oxide

decreasing to zero and 100% fresh ore) started to impact the

ability of the plant to maintain the throughput. The plant is a

conventional two-stage grinding circuit using SAG and ball

mill combination, with pebble crusher, gravity concentration

and an inline leach reactor, followed by a carbon-in-leach

recovery process. The average throughput of the plant is

currently 13,238 tons per day (tpd), with an overall plant

utilisation of 92%.

The purpose of the milling section is to produce blended

leach feed with about 80% passing 125 μm. The section

consists of a SAG mill (8 metres x 5.1 metres) with a power

rating of 5.8 MW and a ball mill (6.1 metres x 9 metres) with

an identical power rating. Cyanide is added to the feed to the

CIL at the trash screen under pan to maximise the gold

dissolution.

Gravity gold is collected and treated by the Knelson

concentrators followed by an intensive cyanidation using the

ILR3000BA. The In-line Leach Reactor (ILR) was

commissioned in December 2012.

A scalped stream of approximately a fifth of the cyclone

underflow stream (circulating load) is fed to the gravity circuit

which comprises 2x KC 48 Knelson gravity concentrators

with a capacity of 200 to 400 tph. The balance of the

circulating load reports to the ball mill as feed. The purpose of

this section is to remove any free gold out of the circuit. The

section consists of two vibratory screens, which are fitted

with five-millimetre aperture screen panels to the two Knelson

concentrators. The feed is introduced to the screen with the

oversize reporting back to the ball mill and the undersize

material is presented to the Knelson concentrators. The tails

from the Knelson concentrators combine with the ball mill

discharge and are presented as a feed to the cyclones. The

concentrate reports to the ILR, which leaches the gold under

pressure and high cyanide concentrations to yield dissolved

gold; which in turn is recovered by electro winning in the

gold room.

Cyclone overflow is screened to remove trash before

reporting to the seven-stage CIL, via the filblast pump, which

is fitted with a multimix head for oxygen injection. The cyclone

overflow comprises 45% solids and is introduced onto the

trash screen (0.8 millimetre apertures) and the undersize is

presented as leach feed. At this stage about 30% of the gold

is dissolved.

Gaseous oxygen and hydrogen peroxide are dosed to CIL

tanks 1 and 2, to maintain dissolved oxygen content of

14 ppm and 10 ppm for the first two tanks respectively.

The slurry discharging from the last tank is screened on a

horizontal linear screen (tailings screen) which is fitted with a

screen cloth of 0.8 millimetre aperture. This screen recovers

and returns to the CIL circuit any coarse carbon discharged

accidentally.

Loaded carbon is recovered from the first tank of the

adsorption train and transferred to acid washing, elution, and

electro winning. Cathodes are washed with high-pressure

spray water and the gold sludge is recovered by filtration.

The gold sludge filter cake is dried and smelted. Slurry

discharging from the last adsorption tank is screened ahead

of thickening and tailings disposal.

The plant throughput is expected to increase to 5.1 Mtpa in

2015. This is driven by current capital projects including a

secondary crusher upgrade to reduce the F80 into the milling

circuit from 44 mm to 28.5 mm. The intermediate plan to

maintain throughput is the use of a mobile crusher to

produce more fines for feeding the SAG mill.

The LoM tailings deposition is based on placement of

5.1 Mtpa. The installed capacity in 2013 reflects the active

ETSF. The new FETSF is built during 2013 and will be

commissioned in 2014 and adds a total capacity of 50.4Mt

up to 2022. TSF 4 then provides in excess of the LoM in

2023. During 2014 and 2015 a portion of the ETSF (4.5Mt) is

to be re-mined to allow for the Damang pit cut-back, and the

special capital requirement associated with this activity is

included in the table.

Modifications and optimisations are planned to increase the Plant throughput from 4.7 Mtpa

to about 5.1 Mtpa with a 100% fresh ore feed.

Damang LoM tailings storage facility assessment

Damang TSF

LoM deposition

(Mt)

Total installed

capacity (Mt)

Surplus/

(shortfall) (Mt)

Capital

requirements

(US$ million)

2013 – ETSF 64.8 70.4 5.6 –

2014 – FETSF Phase 1 69.9 87.8 17.9 37.6

2015 – Mining DPCB2 ETSF Portion – – – 4.0

2022 – FETSF Complete 110.7 120.8 10.12 39.6

2023 – TSF 4 Complete 115.8 144.8 29.02 39.6

Page 11: Damang Gold Mine

9Gold Fields – Damang Gold Mine – Technical Short Form Report 2012 �

8. Sustainable development

Damang’s vision is strongly aligned with the Gold Fields vision of

being the global leader in sustainable gold mining. The mine has

achieved an outstanding health and safety performance record

through the participation of all employees and the application of

safe, innovative processes and technologies, within a framework

of full compliance. It was recognised as the safest operating

mine in Ghana in 2004, achieved the Chairman’s safety shield in

2008, and was named as the Best Mine in Ghana in 2009

based on occupational injury statistics as defined by the Ghana

Minerals Commission. Damang has set a target of zero harm for

the next financial year. The mine’s progressive fatality-free shifts

are currently in excess of six million.

The Abosso Goldfields Limited Environmental Policy, which is

aligned with the Gold Fields Limited Environmental Policy,

underpins the ISO 14001-certified Environmental Management

System (EMS) at Damang. Certification was initially obtained in

July 2003 for a three-year period, and has since undergone

annual third-party audits. The EMS was recertified under the

revised ISO 14001:2004 standard in 2006 and 2009 for a

further three-year period, and two surveillance audits in 2010

and 2011 were completed. A further recertification audit was

successfully completed in February 2012.

During 2012 Damang continued to deliver tangible and

lasting benefits to its stakeholder communities as part of its

commitment to sustainable community development. Social

investment projects during the year focused on education,

health, water and sanitation and sustainable livelihood.

The impact of these projects on the lives of community

members is an important measurement tool for determining

success. During the year, the company commissioned a

study on the impact of its community infrastructural projects.

This was undertaken by a research team from the Kwame

Nkrumah University of Science and Technology; the study

indicated that communities had derived significant benefits

from the provision of quality infrastructure. This is reflected in

increased access to basic education, healthcare, water and

sanitation services, road transportation, and other socio-

economic facilities in the beneficiary communities.

The mine also ran an in-house study on 343 beneficiaries

involved in the oil palm project during the year. Oil palm

beneficiaries constitute 58% of the sustainable livelihood

programme beneficiaries. The study indicated that 73% of

the farms were in good condition (2011: 57%). This is largely

thanks to an awards scheme that was instituted in 2011,

which provides top-performing oil palm farmers with

weedicides, fertilisers and knapsack sprayers.

Safety statistics

Class Units Dec 2012 Dec 2011 Dec 20101 June 2010 June 2009

Fatalities number – – – – –

Fatality rate per mmhrs – – – – –

LDIFR2 per mmhrs 0.40 0.20 0.30 0.30 0.60

1 For six months to December 2010.2 Lost Day Injury Frequency Rate.

Damang complies with the Gold Fields Health and Safety Policy, which subscribes to

international leading practices, including World Bank Policies and Guidelines, International

Finance Corporation Operational Policies, International Labour Organisation Conventions and

OHSAS 18001.

Damang Community Centre opened on 1 February 2012

Page 12: Damang Gold Mine

10 � Gold Fields – Damang Gold Mine – Technical Short Form Report 2012

9. Mineral Resources and Mineral Reserves

The Damang Mineral Resource and Mineral Reserve declarations are based on systematic and sustainable mineral reporting practices. The geological structure and reef-pod models used as the basis of each declaration are updated using systematic RC and diamond drilling with subsequent core-logging. Ongoing assaying of RC, and diamond drilling with grade control samples provides additional grade and geology data, which is incorporated into a detailed evaluation model.

Updated pit designs and schedules are compiled and evaluated based on the most recent technical and economic parameters, and used to compile a LoM plan, taking into account pit limitations, haul road distance and plant capacity. Detailed economic and scenario models underpin Mineral Reserve declarations, while internal and external audits and peer reviews ensure consistency and compliance with regulatory practices.

Mineral ResourcesMineral Resources are quoted at an appropriate in situ economic cut-off grade, with tonnages and grades based on the relevant resource block models. They also include estimates of any material below the cut-off grade that needs to be mined to extract the complete pay portion of the Mineral Resource.

Mineral Resource classification

Classification

Tonnes (Mt) Grade (g/t) Gold (koz)

Dec 2012

Dec 2011

Dec 2010

Dec 2012

Dec 2011

Dec 2010

Dec 2012

Dec 2011

Dec 2010

Open pit and underground

Measured 9.3 12.9 4.4 1.94 1.90 1.54 584 787 218

Indicated 96.1 113.4 55.8 2.01 1.73 1.64 6,205 6,316 2,936

Inferred1 21.5 36.4 12.0 2.26 2.44 3.44 1,565 2,854 1,329

Total open pit and underground 127.0 162.7 72.2 2.05 1.90 1.93 8,355 9,957 4,483

Surface stockpiles

Indicated 2.6 2.7 4.4 0.89 1.00 1.10 74 87 155

Total surface stockpiles 2.6 2.7 4.4 0.89 1.00 1.10 74 87 155

Grand total 129.6 165.4 76.6 2.02 1.89 1.88 8,429 10,044 4,638

1December 2012 excludes the Abosso underground Inferred Mineral Resources of 5.1 Mt at 6.14 g/t.

Mineral Resource classification per mining area

Area*

Measured Indicated Inferred Total Mineral Resource

Tonnes(Mt)

Grade(g/t)

Gold(koz)

Tonnes(Mt)

Grade(g/t)

Gold(koz)

Tonnes(Mt)

Grade(g/t)

Gold(koz)

Tonnes(Mt)

Grade(g/t)

Gold(koz)

Open pit

DPCB 1 1.1 1.84 66 1.2 1.82 73 – – – 2.4 1.84 139

DPCB 2 3.0 2.10 203 29.2 2.15 2,017 10.7 2.29 790 42.9 2.18 3,010

Huni 0.9 1.79 51 8.0 1.97 507 2.0 2.07 130 10.8 1.97 688

Saddle (DPCB 2) 1.9 2.24 136 19.7 2.27 1,434 8.1 2.28 596 29.7 2.27 2,166

Juno 2.5 1.62 129 17.7 1.99 1,131 0.6 2.14 38 20.7 1.95 1,298

Amoanda – – – 4.7 2.12 323 0.1 2.26 5 4.8 2.12 328

Rex** – – – 12.7 1.53 623 – – – 12.7 1.53 623

Tomento East – – – 0.7 1.15 26 – – – 0.7 1.15 26

Tomento West** – – – – – – 0.1 1.42 5 0.1 1.42 5

Abosso Tails – – – 2.2 1.00 71 – – – 2.2 1.00 71

Total open pit 9.3 1.94 584 96.1 2.01 6,205 21.5 2.26 1,565 127.0 2.05 8,355

Stockpiles – – – 2.6 0.89 74 – – – 2.6 0.89 74

Grand total 9.3 1.94 584 98.8 1.98 6,279 21.5 2.26 1,565 129.6 2.02 8,429

* Abosso underground and satellite pits with less than 20 koz have been transferred to inventory.

** Source of oxide.

The year focused on consolidating the vision of a LoM to 2028 and beyond, based on a

post-depletion Mineral Resource of 8.4 Moz and post-depletion Mineral Reserves of 4.1 Moz.

Page 13: Damang Gold Mine

11Gold Fields – Damang Gold Mine – Technical Short Form Report 2012 �

Modifying factors�� The Measured and Indicated Mineral Resources are

inclusive of those Mineral Resources modified to produce

Mineral Reserves;

�� Unless otherwise stated, all Mineral Resources and Mineral

Reserves are quoted as 100% and are not attributable

with respect to ownership;

�� All Mineral Reserves are quoted in terms of RoM grades

and tonnages, as delivered to the metallurgical processing

facilities, and are therefore fully diluted;

�� Mineral Reserve statements include only Measured and

Indicated Mineral Resources, modified to produce Mineral

Reserves and contained in the LoM plan; and

�� Mineral Resources and Mineral Reserves have undergone

internal and external audits during the current year, and

any issues identified were rectified during the current

reporting cycle.

Juno pit, load and haul operations

Blast hole drilling during night shift

Mineral Resource

parameters UnitsDec

2012

Dec2011

Gold price US$/oz 1,650 1,450

Cut-off for fresh ore g/t 0.65 0.55

Cut-off for oxide ore g/t 0.55 0.32

Mineral Reserve

parameters UnitsDec

2012

Dec2011

Gold price US$/oz 1,500 1,300

Cut-off for fresh ore g/t 0.71 0.62

Cut-off for oxide ore g/t 0.60 0.35

Strip ratio waste:ore 6.51 4.6

Dilution (hydrothermal) % 6 – 20 10 – 15

Dilution (palaeoplacer) cm 40 40

Mining recovery

factor % 90 – 100 90 – 100

MCF % 89 – 92 92

Plant recovery factor

– fresh ore % 92 91.5

Plant recovery factor

– oxide ore % 93.5 93.5

Processing capacity Mtpa 5.12 5.11

1 At 60% fresh and 40% oxide ore blend.2 At 100% fresh blend from 2015.

Grade tonnage curves

Open pits

To

nnes (m

illio

ns)

Avera

ge g

rad

e a

bo

ve c

ut-

off (g

/t)

0 0.40.2 0.6 0.8 1.0

Cut-off grade (g/t)

200

180

160

140

120

100

80

2.6

2.2

1.8

1.4

1.0

Page 14: Damang Gold Mine

12 � Gold Fields – Damang Gold Mine – Technical Short Form Report 2012

Mineral ReservesThe Mineral Reserve estimate for Damang Gold Mine is based on the development of appropriately detailed and engineered LoM plans. Experienced engineers use mine-planning software to develop designs and schedules to the appropriate level of detail, incorporating modifying factors, cut-off grades and the results of other techno-economic investigations.

In general, Proved Mineral Reserves are derived from Measured Mineral Resources, and the Probable Mineral Reserves are derived from Indicated Mineral Resources, except where confidence in the modifying factors lead to Measured Mineral Resources converting to lower confidence Probable Mineral Reserves. The stockpiles included in the Mineral Reserve comprise mostly lower-grade mineralisation that has been accumulated since the start of mining of the Damang pit. The stockpile material comprises around 2.6% of the Mineral Reserve ounces and 4.4% of the Mineral Reserve tonnes.

Mineral Reserve classification

Classification

Tonnes (Mt) Grade (g/t) Gold (koz)

Dec 2012

Dec 2011

Dec 2010

Dec 2012

Dec 2011

Dec 2010

Dec 2012

Dec 2011

Dec 2010

Open pit

Proved 8.7 8.6 2.4 1.81 2.00 1.62 509 552 125

Probable 64.8 50.4 33.7 1.68 1.70 1.66 3,507 2,751 1,800

Total open pit 73.5 59.0 36.1 1.70 1.74 1.66 4,016 3,303 1,925

Surface stockpiles

Probable 2.6 2.7 4.4 0.89 1.00 1.10 74 87 155

Total surface stockpiles 2.6 2.7 4.4 0.89 1.00 1.10 74 87 155

Grand total 76.1 61.7 40.5 1.67 1.71 1.60 4,090 3,390 2,080

Mineral Reserve classification per mining area

Area

Proved Probable Total Mineral Reserve

Tonnes(Mt)

Grade(g/t)

Gold(koz)

Tonnes(Mt)

Grade(g/t)

Gold(koz)

Tonnes(Mt)

Grade(g/t)

Gold(koz)

DPCB 1 1.056 1.71 58 1.157 1.04 39 2.213 1.36 97

DPCB 2 3.077 1.82 180 27.937 1.78 1,600 31.014 1.78 1,780

Juno 1.278 1.63 67 3.655 1.28 150 4.933 1.37 217

Huni 994 1.63 52 6.360 1.49 305 7.354 1.51 357

Saddle (DPCB 2) 2.326 2.03 152 12.468 1.93 775 14.794 1.95 927

Lima South – – – – – – – – –

Tomento East – – – 650 1.10 23 650 1.10 23

Tomento West – – – – – – – – –

Amoanda – – – 3.244 2.03 212 3.244 2.03 212

Rex – – – 7.323 1.44 339 7.323 1.44 339

Chida – – – – – – – – –

Abosso Tailings – – – 2.019 1.01 65 2.019 1.01 65

Surface stockpiles – – – 2.587 0.89 74 2.587 0.89 74

Grand total 8.731 1.81 509 67.400 1.74 3,581 76.131 1.67 4,090

Run of mine stockpile

Page 15: Damang Gold Mine

13Gold Fields – Damang Gold Mine – Technical Short Form Report 2012 �

Resource definition drilling

Mineral Resources and Mineral Reserves reconciliation year-on-year

Factors that affected Mineral Reserve reconciliation

�� Growth largely as a result of updated resource

modelling at Greater Damang coupled with the gold

price increase; and

�� Increased pit design geometry and parameters at

DPCB 2.

Go

ld (M

oz)

0.09 0.07

1.78

0.134.09

0.270.33

0.19

3.39

Change in Mineral ReservesDecember 2011 to December 2012

MC

F

Decem

ber

20

11

Min

ed

dep

letio

n

Reso

urc

e

mo

delling

Eco

no

mic

fa

cto

rs

Sate

llite

pits

Desig

n

Oth

er

Decem

ber

20

12

5.0

4.0

3.0

2.0

1.0

0.0

Mineral Reserve sensitivityTo illustrate the impact of fluctuations in gold price and

exchange rates on the current declaration, Damang has

generated sensitivities with respect to Mineral Reserves.

These sensitivities (other than for the base case) are not

supported by detailed plans and depletion schedules. They

should only be considered on an indicative basis; specifically

as such sensitivities assume 100% selectivity, without any

operating cost increases.

The following graph indicates the managed Mineral Reserve

Sensitivity at -10%, -5%, Base, +5%, +10% and +25% to the

gold price.

Managed Mineral Reserve sensitivity

Go

ld (M

oz)

4.784.454.31

4.093.953.63

(-10%) (-5%) (Base)1,500

(+5%)

Gold price (US$/oz)

(+10%) (+25%)

6

5

4

3

2

1

0

Factors that affected Mineral Resource reconciliation

�� 1.4 Moz transferred to inventory (Abosso UG and

Satellite pits with <20 koz); and

�� The gold price has impacted additional ounces at

Greater Damang but the net result has been to some

extent negated by the increased costs.

Go

ld (M

oz)

0.60

1.448.430.27 0.29

0.21

10.04

Change in Mineral ResourcesDecember 2011 to December 2012

Co

sts

Decem

ber

20

11

Min

ed

dep

letio

n

Reso

urc

e

mo

delling

Eco

no

mic

fa

cto

rs

Tra

nsfe

r to

in

vento

ry

Decem

ber

20

12

12.0

10.0

8.0

6.0

4.0

2.0

0.0

Page 16: Damang Gold Mine

14 � Gold Fields – Damang Gold Mine – Technical Short Form Report 2012

10. Competent Persons

Competent Persons

Richard Downing: Regional Mineral Resources Manager

BSc Hons (Geology and Environment) GDE Mining Engineering, MAusIMM (No 229889). Richard has 32 years’ experience in

mining and exploration in South Africa, Ireland and Ghana and is the lead Competent Person, jointly responsible for the

overall correctness, standard and compliance of this declaration.

David Dadzie: Chief Mine Geologist

BSc Geology, Member of the Ghana Institute of Engineers. David has 13 years’ experience in mining and exploration in

Ghana and is responsible for grade control, reserve reconciliation and resource modelling.

Sean Kelly: Geostatistics and Evaluation Manager

National Higher Diploma (Mineral Resource Management), GDE (Mining Engineering), Mine Surveyor’s Certificate of

Competency, Member of PLATO (No MS0095). Sean has 30 years’ experience in the mining industry and is responsible for

the resource modelling and estimation.

Deon Steenkamp: Chief Exploration Geologist

BSc (Geology), BSc (Hons.) Economic Geology, MBA, MAusIMM (301686). Deon has 30 years’ experience in mining and

exploration in Ghana and South Africa and is responsible for exploration programme planning and implementation.

Robert van der Westhuizen: Mine Planning Engineer

MSc (Mining), MAusIMM (No 223783). Robert has 33 years’ experience in the mining industry in South Africa, Mali, Ghana

and Tanzania and is responsible for mine planning, optimisation and scheduling.

Internal technical reviews have been conducted by the Competent Persons as listed, who

are full-time employees of Gold Fields Limited.

11. Key technical staff

Post Incumbent Qualifications Years Key responsibilities

General Manager Christo Viljoen NHD (Electrical Engineering);

GCCE (Mines); GCCE (Factories)

PrEng 2008/900/24

27 Responsible for the overall strategic

direction, leadership and

management

Manager Mining Samuel Takyi BSc Mining Engineering 15 Responsible for mining operations

and scheduling

Metallurgy

Manager

Philip Stander BEng (Chemical)

MBL (Master in Business

Leadership)

28 Mineral processing and metallurgy

Environmental

Manager

Francis Nyame MSc (Environmental Management)

AIEMA – 011446

22 Environmental management.

Monitoring and compliance with

regulatory requirements.

Conformance with ISO 14001

systems

Finance Manager Augustine

Wireko

Asubonteng

ACCA (1142411) CA BSc –

Renewable Natural Resources

5 Financial management, reporting

and compliance

Engineering

Manager

Adriaan Stadler BEng (Mech) MBA 34 Engineering, logistics and

infrastructure management

Human Resources

Manager

Charles Klutse BA (Social Work and Administration) 13 Human resources training and

development, social responsibility

Occupational

Health and Safety

(OHS) Manager

John Otoo PgDFRM, AIMSA, MBA, BSc 10 Custodian and Management of

mine risk, exposure and

occupational hygiene monitoring

programmes

Page 17: Damang Gold Mine

Gold Fields LimitedDamang Gold Mine

Plan showing mine infrastructure as at 31 December 20121 0.5 0 1 2 3 4 5

Kilometres

Ghana National Grid Co-ordinate System

Mining lease . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mining lease Lima South . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Prospecting Licenses (PL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Tailings Storage Facility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Open Pit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Waste Dump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Roads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

National Railway. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Exploration Sites/Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Damang has the area from surface to 30m below . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Tarkwa has the area from below 30m . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Reference

Page w

idth 208 mm

Page w

idth 205 mm

Page 18: Damang Gold Mine

12. Brief history

The history of Damang

Late 19th

century:

Several small mining companies operated the Abontiakoon concession near Tarkwa town leading to the

sinking of eight vertical shafts and excavation of numerous open pits.

1882: Operations at the underground Abosso mine exploit banket conglomerates to a depth of 850 metres.

1920: Adjah Bippo and Cinnamon Bippo underground mines to the north incorporated into the Abosso Mine

holdings.

1956: Abosso Mine ceased operation with recorded production of 2.7 Moz at an average grade of 9.8 g/t.

1989: Ranger Exploration (Ranger) began investigation of retreating tailings from the Abosso mine. Artisanal

miners appeared to be exploiting alluvium shedding from two low ridges in the area.

1990 – 1992: Pitting and trenching demonstrated near-surface mineralisation over a three-kilometre strike length.

1993 – 1996: A drilling programme and subsequent feasibility study showed that mining a mineralised quartz vein

system to a depth of 200 metres would be viable.

1997: Open pit operations commenced in August on the main pit, following the relocation of 3,000 people. Gold

production started in November at the 3.0 Mtpa capacity CIL plant.

2001: Gold Fields and Repadre sign an agreement to purchase Ranger’s 90% interest in Damang.

2003: IAMGold and Repadre merge to give IAMGold an 18.9% interest in Damang and GF Ghana a 71.1%

interest; and

Damang Expansion Project initiated to identify additional sources of ore from areas around the Main Pit.

2004: Further drilling carried out at the Main Pit and feasibility study initiated to test the viability of a cutback to

extend the life of the main pit.

2005: Drilling and Mineral Resource estimation completed for the Damang pit cutback (DPCB). AFE submitted

and approved. Waste mining at Damang cutback commenced in July. Mining at Amoanda commenced in

January and mining at Tomento commenced in July. A regional prospectivity study was completed in

November.

2006: Drilling and Mineral Resource estimation carried out in Rex, Tomento North, Tomento East, Tomento West

and Huni. Block models built for Chida, Chida South and Bonsa North with historical data. Amoanda Pit

finally depleted August 2006.

2007: Drilling and Mineral Resource estimation carried out in Rex, DPCB and Tomento West. Mining at Tomento

North Pit 2 commenced to boost oxide feed to mill.

2008: Drilling and Mineral Resource estimation carried out at Rex, Abosso Tailings and Abosso Deeps. Rex

Mineral Resource model revised and new block model built for Tomento West. Mining at Tomento East

brought forward, commenced April 2008.

2009: Drilling and Mineral Resource estimation carried out in Amoanda North, Tomento West, and Abosso

tailings. Rex Mineral Resource model revised. New Mineral Resource model developed for DPCB and

Amoanda North. Started mining at Rex and Abosso Tailings.

2010: Drilling and Mineral Resource estimation carried out at Amoanda North extension and corridor, Rex, Huni

and Juno. New resource models generated for DPCB including Juno and Huni, Amoanda and Rex.

2011: An updated Conceptual Extensional Resource Model developed for Greater Damang Pit (Huni, Damang,

Main and Juno). Portions of Phase II drilling programme were completed and incorporated into Greater

Damang PFS with resultant increase in Mineral Resource and Mineral Reserve ounces;

Quarter 1 saw move to owner mining and maintenance; and

Gold Fields Ghana Limited acquired the indirect 18.9% IAMGold interest in Damang and now holds 90%

with the remaining 10% held by the Ghanaian government.

2012: Continued pre-feasibility study for Greater Damang following the completion of the Phase ll drilling

programme. Resource in-fill and geotechnical drilling programmes completed on the Greater Damang

Extension Project. In-fill drilling and modelling of the Greater Amoanda Project completed. Planned

sterilisation drilling completed.

17 � Gold Fields – Damang Gold Mine – Technical Short Form Report 2012

Page 19: Damang Gold Mine

Schematic 3D impression of the Greater Damang Project

Damang Mineral Resource and Mineral Reserve classification

EXPLORATIONRESULTS

MINERALRESERVES

MINERALRESOURCES

Reported as in situmineralisation estimates

Consideration of mining, metallurgical, economic, marketing, legal,environmental, social and governmental factors (the “modifying factors”)

129.6 Mt @ 2.02 g/t8.4 Moz

76.1 Mt @ 1.67 g/t4.1 Moz

67.4 Mt @ 1.74 g/t3.6 Moz

8.7 Mt @ 1.81 g/t0.5 Moz

21.6 Mt @ 2.23 g/t1.6 Moz

98.8 Mt @ 1.98 g/t6.3 Moz

9.3 Mt @ 1.94 g/t0.6 Moz

Reported as mineableproduction estimates

Incr

easi

ng le

vel o

f geo

scie

ntifi

c kn

owle

dge

and

confi

denc

e

MEASURED PROVED

PROBABLEINDICATED

INFERRED

Borehole tracesPit outline

Damang

Saddle

Huni

Juno

18 � Gold Fields – Damang Gold Mine – Technical Short Form Report 2012

Page 20: Damang Gold Mine

This Technical Short Form Report (the Report) contains information as at 31 December 2012 (the Effective Date of this

Report). The statements and information set out in this Report speak only as of the Effective Date of this Report. Shareholders

and other interested and affected parties are therefore urged to review all public disclosures made by Gold Fields after the

Effective Date of this Report, as some of the information contained in the Report may have changed or been updated. Gold

Fields does not undertake any obligation to update publicly or release any revisions to statements and information set out in this

Report to reflect events or circumstances after the Effective Date of this Report, or to reflect the occurrence of unanticipated

events, unless obliged to do so pursuant to law or regulation. In such event, Gold Fields does not undertake to refer back to

any information contained in this Report.

Notes

BASTION GRAPHICS

Damang Gold Mine: load and haul operations

Page 21: Damang Gold Mine

Registered Office South Africa:

150 Helen RoadSandownSandton, 2196JohannesburgGauteng

Private Bag X30500Houghton, 2041South Africa

Website: http://www.goldfields.co.zaTelephone: +27 (0) 11 562 9700Facsimile: +27 (0) 11 562 9838

“If we cannot mine safely, we will not mine”

Gold Fields Safety Value