Manon Besset¹、Toru Tamura²、*Edward ANTHONY¹、Guillaume Brunier¹、Yoshiki Saito²、Philippe Dussouillez¹、Nguyen Van Lap³、Oahn Ta³ (1.Aix Marseille Université, CEREGE - OSU PYTHEAS, Aix en Provence cedex 4, France、2.Institute of Geology and Geoinformation, Geological Survey of Japan (GSJ), AIST. Central 7, Higashi 1-1-1, Tsukuba, Ibaraki, 305-8567, Japan、3.HCMC Institute of Resources Geography (HCMCIRG) Vietnam Academy of Science and Technology (VAST) 01, Mac Dinh Chi Str., Dist. 01, HoChiMinh City, Vietnam)