[1] ETH Zentrum, Inst Geol, CH-8092 Zurich, Switzerland
[2] Univ Grenoble 1, CNRS, Lab Geophys Interne & Tectonophys, F-38041 Grenoble 9, France
[3] Univ Lyon 1, Lab Sci Terre, Ecole Normale Super Lyon, CNRS,UMR 5570,INSU, F-69622 Villeurbanne, France
[4] Hiroshima Univ, Dept Earth & Planetary Syst Sci, Higashihiroshima 724, Japan
[5] Natl Taiwan Univ, Dept Geosci, Sect 4, Taipei 106, Taiwan
[6] Univ Grenoble 1, Lab Planetol Grenoble, F-38041 Grenoble, France
[7] Univ Franche Comte, Math Lab, F-25030 Besancon, France
[8] NSC, CNRS, ADEPT, Int Lab, Taipei, Taiwan