CERTIFICATE OF QUALIFICATION
I, Jose Rios Duarte, with business address at 5597 W. County 15 th Street, Somerton, AZ 85350 USA and
Guillermo Carpena #78 esq. con Nayarit, Colonia 5 de Mayo, Hermosillo, Sonora México 83010 do hereby
Dated at, __________, this 9 th day of Aug, 2010.
Jose Rios Duarte – Mining Engjneer
1. I have reviewed and/or prepared engineering and mine planning documentation for the report titled,
Technical Report, La Bolsa Project, Pre-Feasibility Study for Minefinders Corporation Ltd, dated August 9,
2. I hold a Bachelors degree in Mining Engineering from the University of Sonora, in Hermosillo, Sonora,
3. I have practiced my profession within the mining industry continuously for 27 years.
4. I am a registered Mining Engineer, in the state of Sonora, Mexico.
5. I am currently employed as a Mining Engineer with Sonoran Resources, LLC, a consulting group specializing
in mine design and construction.
6. I have no received, nor do I expect to receive, any interest, directly or indirectly, from Minefinders
Corporation Ltd., or of any affiliate thereof.
7. I have had no involvement with the property that is the subject of this Pre-Feasibility Study.
8. By reason of education, experience and independence, I meet the definition of Independent Qualified Person
as outlined in National Instrument 43-101.