*Karl Dimarucut Jabagat¹、Jillian Aira S. Gabo-Ratio²、Omar B. Soberano³、Karlo L. Queaño⁵、Eric S. Andal⁶、Kotaro Yonezu⁴、Carla B. Dimalanta²、Graciano P Yumul Jr.⁷、Yuan-Hsi Lee¹ (1.Department of Earth and Environmental Sciences, National Chung Cheng University, Taiwan、2.Rushurgent Working Group, National Institute of Geological Sciences, College of Science, University of the Philippines-Diliman、3.Graduate School of International Resource Sciences, Akita University, Akita, Japan、4.Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, Fukuoka 819-0395, Japan、5.Mines and Geosciences Bureau, Department of Environment and Natural Resources, Quezon City, Philippines,、6.Itogon-Suyoc Resources Incorporated, Itogon Benguet, Philippines、7.Cordillera Exploration Co. Inc., BGC, Taguig City 1630, Philippines)