Brock has over 40 years experience in minerals exploration and mining economic analysis. During his career he has been involved in porphyry, volcanic and sediment-hosted gold discoveries in B.C., Nevada, Utah, and Arizona. Since 2009 he has been a Vancouver-based consulting geologist focused on porphyry Cu/Au/Mo exploration in the Americas. He has consulted to Brixton, primarily on the Thorn Project, since mid-2018. Other clients have included Imperial Metals (Red Chris and Catface, B.C.), Fortuna Silver (Lindero, Argentina), Adventus Mining (Pijili and Santiago, Ecuador), Redhawk Resources (Copper Creek, Arizona), and Abacus Mining & Exploration (Willow, Yerington district, Nevada). From 1995 to 2009, Mr. Riedell worked for BHP in the western USA, Chile, and Canada; he served as global Chief Geologist from 2002 to 2005. His early career was mostly in western U.S. exploration roles with Exxon Minerals and Newmont. He mixes consulting with volunteer work for the Society of Economic Geologists Student Field Trip program and has attended two student
trips as a professional mentor.