[1] Univ Durham, Dept Earth Sci, Rock Mech Lab, Durham DH1 3LE, England
[2] Japan Agcy Marine Earth Sci & Technol JAMSTEC, Kochi Inst Core Sample Res, Kochi 7838502, Japan
[3] Ruhr Univ Bochum, Inst Geol Mineral & Geophys, Expt Geophys Lab, D-44780 Bochum, Germany
[4] Ist Nazl Geofis & Vulcanol, I-00143 Rome, Italy
[5] Univ Padua, Dipartimento Geosci, I-35137 Padua, Italy
[6] Univ Siena, Dipartimento Sci Terra, I-53100 Siena, Italy
[7] Hiroshima Univ, Grad Sch Sci, Dept Earth & Planetary Syst Sci, Higashihiroshima 7398526, Japan