MEDIA RELEASE
GOLD FIELDS AND BUENAVENTURA ANNOUNCE MAJOR
GOLD DISCOVERY IN SOUTHERN PERU
Johannesburg, 11 May 2010:
Chucapaca's joint venture partners, Gold Fields Limited (51%) (Gold Fields)
(JSE, NYSE, NASDAQ Dubai: GFI) and Compañía de Minas Buenaventura S.A.A. (49%) (Buenaventura,
BVN), are pleased to announce the discovery of a major gold-copper-silver deposit in their Chucapaca project
area (CPA) in southern Peru.
Called the Canahuire deposit, it has a Mineral Resource estimate of 5.6 million gold equivalent ounces
1
(Table
1), with mineralisation potential beyond the extent of current drilling. The Inferred Mineral Resource for
Canahuire is approximately 83.7 Mt at 1.9 g/t gold, 0.09% copper and 8.2 g/t silver for a total of 5.6 million gold
equivalent (AuEq 1) ounces.
Table 1: Chucapaca Project, Canahuire Deposit Inferred Mineral Resource (1 May 2010)*
Tonnes
(Mt)
Grade Au
(g/t)
Grade Ag
(g/t)
Grade
Cu (%)
Grade AuEq
1
(g/t)
Metal AuEq
1
(Moz)
83.7
1.9
8.2
0.09
2.1
5.6
* These Mineral Resources are not Mineral Reserves and do not have demonstrated economic viability. Attributable metal
to Gold Fields and Buenaventura is 2.9 Moz AuEq
1
and 2.8 Moz AuEq
1
, respectively. The Mineral Resource is reported at
a 0.67 g/t gold equivalent cut-off grade constrained within an optimised pit shell. The pit shell is based on price
assumptions of US$1,150/oz gold, US$3.00/lb copper and US$17/oz silver. The Mineral Resource estimate, which is
reported in accordance with the South African Code for the Reporting of Exploration Results, Mineral Resources and
Mineral Reserves, 2007 Edition (SAMREC code), is reported without dilution or ore loss.
In a joint statement Nick Holland, Chief Executive Officer of Gold Fields, and Roque Benavides, Chief
Executive Officer of Buenaventura, said: "Canahuire is a highly promising gold discovery in an emerging gold
district in South America. Geological indications are that there is significant upside at the Canahuire deposit, as
well as at other targets within the project area. This is an important growth opportunity for Gold Fields and
Buenaventura, and, could also make a significant contribution to the economic development of our community
partners in the Moquegua region."
The Canahuire deposit is one of several targets in the 12,700 ha CPA, which is on average 4,800 m high and
located in the Altiplano area of southern Peru, 120 km northeast of the city of Moquegua. Both joint venture
partners have independently consolidated a significant portfolio of concessions adjacent to the CPA and are
advancing exploration on these concessions.
Tommy McKeith, Executive Vice president for Exploration and Business Development of Gold Fields
commented: "Delineating a 5.6 Moz AuEq1 resource in only 18 months from the first hole is a remarkable
achievement by the exploration team. The Canahuire interim scoping study is on track for completion by June
2010 and, subject to a positive economic outcome, we will commence pre-feasibility in July 2010."
While our initial focus is on the Canahuire deposit, we will at the same time continue to explore the potential of
the rest of the CPA," said Cesar Vidal, Buenaventura's Executive Vice President for Exploration.