1. Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, 2020-2207 Main Mall, Vancouver, BC V6T 1Z4, Canada
2. Norman B. Keevil Institute of Mining Engineering, University of British Columbia, 2329 West Mall, Vancouver, BC V6T 1Z4, Canada
3. Golder Associates, Suite 200—2920 Virtual Way, Vancouver, BC V5M 0C4, Canada
4. Compañia Antamina Minera S.A., Av. El Derby No. 055, Santiago de Surco, 15023 Lima, Peru