The tour group upon return to surface at Olympic Dam.   From the left, standing: Greg Steemson (Consultant Geologist/Geophysicist, Australia),   Simon Dorling (CSA Global, Australia),   Stuart McCracken (Anglo American, Canada),   Martin Griessmann (Student, University of Adelaide),   Clare O'Dowd (Cameco, Canada),   Sarah Chinner (BHP Billiton, Olympic Dam),   Mat Brown (Ivanhoe Australia),   Stephen Reford (Darnley Bay Resources, Canada).
From the left, kneeling: Koichi Hisatani (JOGMEC, Japan),   and   Kazuo Masuda (JOGMEC, Australia).
Photograph by Mike Porter.