*Geoffrey GRANTHAM¹、Madhusoodhan SATISH-KUMAR²、Naho OTSUJI³、Erasmus BURGER⁴、Tetsuo KAWAKAMI⁵、Masahiro ISHIKAWA⁶、Noriyosh TSUCHIYA⁷、ROUX, Petrus LE⁸ (1.Department of Geology, University of Johannesburg, South Africa.、2.Department of Geology, Niigata University, Japan、3.Graduate School of Science and Technology, Niigata University, Japan、4.Department of Geology, University of Pretoria, South Africa、5.Department of Geology and Mineralogy, Kyoto University, Japan、6.Graduate School of Environment and Information Sciences, Yokahama National University, Japan、7.Department of Geoscience and Technology, Graduate School of Engineering, Tohoku University, Japan、8.Department of Geological Science, University of Cape Town, South Africa)