1. Postdoctoral Research Fellow, Geotechnical Institute, TU Bergakademie Freiberg, Gustav-Zeuner-Str. 1, 09599 Freiberg, Germany (corresponding author).
2. Professor, Deep Earth Energy Laboratory, Dept. of Civil Engineering, Monash Univ., Building 60, Melbourne, VIC 3800, Australia.
3. International Junior Research Fellow, Dept. of Earth Sciences, Durham Univ., Durham DH1 3LE, U.K.