*Muhammad Arba Azzaman^1,4、Ryohei Takahashi¹、Andrea Agangi¹、Pearlyn Manalo¹、Hinako Sato¹、Manuel Augusto Manuel Nopeia²、Arifudin Idrus³、Doly R Simbolom⁵ (1.Graduate School of International Resource Sciences, Akita Univ.、2.Center for Regional Revitalization in Research and Education, Akita Univ.、3.Department of Geological Engineering, Univ. Gadjah Mada、4.Department of Geological Engineering, Halu Oleo Univ.、5.PT Sumber Energi Jaya)

*Tomy Hidayat Herawan¹、Ryohei Takahashi¹、Andrea Agangi¹、Pearlyn Manalo¹、Hinako Sato¹、Manuel Augusto Manuel Nopeia¹、Arifudin Idrus²、Andi Pahlevi³ (1.Akita University、2.Universitas Gadjah Mada、3.Merdeka Copper Gold)