To be honest, for the actual stage of exploration—because you're going to have your grassroots exploration and then you're going to get into pre-feasibility studies—it is not unlikely that it would take at least seven years to determine that you have a reserve in order to bring it into production. It takes seven years and probably another two to three years to actually develop the mine and bring it into production.
On October 17th, 2012. See this statement in context.