1. Dep. of Earth, Ocean and Atmospheric Sciences; Univ. of British Columbia; 2020-2207 Main Mall Vancouver BC V6T 1Z4 Canada
2. Norman B. Keevil Institute of Mining Engineering, Univ. of British Columbia; 2329 West Mall Vancouver BC V6T 1Z4 Canada
3. BGC Engineering Inc.; 500-980 Howe Street Vancouver BC V6Z 1N9 Canada