REVIEW OF OPERATIONS: SOUTH AMERICA REGION
OVERVIEW
Location: The Cerro Corona Mine is situated in
the highest part of the Western Cordillera of the
Andes in northern Peru, 1.5 km west-northwest
of the village of Hualgayoc in the Department
of Cajamarca, centred at longitude 78° 37’
8” W and latitude 6° 45’ 36” S. The mine is
located approximately 600 km north-northeast
of Lima and approximately 80 km by road north
of the city of Cajamarca. Access is by road
from Cajamarca. Infrastructure: The project
involves the production of gold and copper by
conventional open pit mining methods, and the
copper-gold flotation concentrate is trucked to
the Port of Salaverry for shipment to smelters
in Japan, Korea and Europe. Geology: The
Cerro Corona Cu-Au deposit is a Porphyrystyle
mineralisation hosted by a 600-700
metre diameter sub-vertical cylindrical-shaped
diorite porphyry emplaced in mid-Cretaceous
limestone, marls and siliclastic rocks. Mine type
and depth: Large open pit mine. Employees
in service: The mine has 310 permanent
employees and 560 contractors active on
the operations and currently there are 40
employees and approximately 900 contractors
on various capital projects.
SAFETY AND ENVIRONMENT
Cerro Corona experienced a significant
improvement in safety performance in F2009
compared to the previous year, with the Lost
Day Injuries down from 12 to 2, Medically
Treated Injuries down from 21 to 11, and zero
fatalities. The lost day injury frequency rate
improved from 0.96 in F2008 to 0.25 in F2009.
Management has focused on promoting
a culture of safety awareness among all
employees and contractors to further continue
improvements in the mine´s safety performance.
A new hazard reporting system was successfully
implemented during the March quarter.
Implementation also began on the OHSAS
18001 Health and Safety Management
System with the objective of further reducing
injuries, occupational illness and property
damage as well as process losses. The
certification of the programme is expected
to be obtained by the end of F2010. The
ISO14001:2004 (Environmental Management
System) certification process was initiated in
F2009 and final certification is planned for
early 2010.
The sustainable development programmes,
together with infrastructure development
projects for the local communities, and the
employment of local people and contractors,
have been the three pillars of the social
strategy, which has created strong goodwill
for Gold Fields in the region. Commitments to
the surrounding communities have been met
and have allowed Cerro Corona to enhance its
relationships with local groups inside its area of
influence.
During F2009, we received two important
awards for our safety and environmental
performance. We were placed second in the
National Pit Safety Awards presented by the
Peruvian National Institute of Mine Engineers
and we achieved second position at the
Expomina national contest for environmental
practices and projects.
OPERATIONAL REVIEW
The year marked the transition of Cerro Corona
from a project phase to a fully functional mining
operation. Construction of the project was
completed in July 2008 for a total construction
cost of US$545 million. Commissioning and
production build-up of the operation followed
and was completed by the end of the first
quarter, with the first shipment of a parcel of
4,026 wet metric tons of concentrate. Cerro
Corona reached design capacity by the end of
December 2008 and steady state operations
were reached during the third quarter of F2009.
Construction of the second phase of the tailings
dam started in late August 2008, while planned
levels should be achieved in December 2009.
Gold produced for the nine months to year
end, since the mine became operational,
amounted to 105,000 ounces. Copper
production amounted to 23,947 tons.
Converting the copper production to equivalent
gold ounces was based on an average copper
price of US$4,115 per ton and an average
gold price of US$875 per ounce and resulted
in production for F2009 of 219,000 equivalent
ounces, of which 218,000 equivalent ounces
were sold.
Tons milled amounted to 4.55 million, producing
119,000 tons of concentrate.
Total tons mined amounted to 9.9 million which
included 5.0 million tons of ore.
Revenue amounted to US$184 million.
Costs, including gold-in-process movements,
amounted to US$82 million. The operating
profit of US$102 million resulted in an operating
margin of 55 per cent for F2009.
Total cash cost for F2009 averaged US$369
per ounce based on equivalent ounces.
Capital expenditure decreased from
US$348 million in F2008 to US$117 million in
F2009 due to achieving commercial levels of
production at the end of the December quarter.
The majority of the expenditure during F2009,
other than on the project phase, was incurred
on the Tailing Management Facility (TMF).
Notional cash expenditure for F2009 was
US$926 per ounce.
F2010 Focus Areas
- To obtain ISO14001:2004 certification
for the Environmental Management
System and complete the OHSAS18001
certification process;
- Emphasis on production and cost
optimisation, with significant focus on
improving recoveries and efficiencies;
- Total tons mined to 12.6 million and steady
nameplate production of 6.2 million tons
of ore treated; and
- Deliver the construction targets of the
first two raises of the Las Gordas and Las
Aguilas tailings dam.
|
Lost Day Injury Frequency Rate
per million man hours worked

Serious Injury Frequency Rate
per million man hours worked


|
|
Cerro Corona Gold Mine
|
|
|
|
2009 |
|
2008 |
|
| |
Open pit mining |
|
|
|
|
|
|
| |
Waste mined |
'000t |
|
4,894 |
|
5,762 |
|
| |
Ore mined |
'000t |
|
5,044 |
|
939 |
|
| |
Combined grade |
g/t |
|
2.4 |
|
2.7 |
|
| |
Au grade |
g/t |
|
1.2 |
|
1.2 |
|
| |
Cu grade |
per cent |
|
0.8 |
|
0.4 |
|
| |
Strip ratio |
W:O |
|
1.0 |
|
6.1 |
|
| |
Processing |
|
|
|
|
|
|
| |
Tons milled |
'000t |
|
4,547 |
|
- |
|
| |
Combined yield |
g/t |
|
1.5 |
|
- |
|
| |
Au yield |
g/t |
|
0.7 |
|
- |
|
| |
Cu yield |
per cent |
|
0.5 |
|
- |
|
| |
Gold produced |
'000oz |
|
105 |
|
- |
|
| |
Copper produced |
'000t |
|
24 |
|
- |
|
| |
Copper produced expressed in |
|
|
|
|
|
|
| |
equivalent gold ounces |
'000eqoz |
|
114 |
|
- |
|
| |
Total produced |
'000eqoz |
|
219 |
|
- |
|
| |
|
eqkg |
|
6,822 |
|
- |
|
| |
Total cash cost |
US$/eqoz |
|
369 |
|
- |
|
| |
Notional cash expenditure |
US$/eqoz |
|
926 |
|
- |
|
| |
Net attributable earnings |
US$m |
|
20.5 |
|
- |
|
| |
Capital expenditure |
US$m |
|
116.8 |
|
348.4 |
|
|
|