Department of Resources Engineering, National Cheng-Kung University, Department of Resources Engineering, National Cheng-Kung University, Tainan, 701 Taiwan
Department of Resources Engineering, National Cheng-Kung University, Department of Resources Engineering, National Cheng-Kung University, Tainan, 701 Taiwan ;
Institute of Earth Science, Academic Sinica, Institute of Earth Science, Academic Sinica, Nankang, 115 Taiwan