*Ammini Sasidharan Silpa¹, Madhusoodhan Satish-Kumar², Krishnan Sajeev³ (1.Department of Earth Science, Shimane University, 2.Faculty of Science, Niigata University, 3.Centre for Earth Sciences, Indian Institute of Science)

*Kiran Sasidharan¹, Yoshihiro Nakamura², Hiroaki Ohfuji³, Madhusoodhan Satish-Kumar¹ (1.Niigata University, 2.Geological Survey of Japan, AIST, 3.Tohoku University)

*Krishnan Sajeev¹, P Rajkumar², Ippei Kitano³, Durgalakshmi Durgalakshmi⁴, Madhusoodhan Satish-Kumar⁵, Sayantani Chatterjee⁶, Ian S Williams⁴, Eiichi TAKAZAWA⁵ (1.Centre for Earth Sciences, Indian Institute of Science, 2.Advanced Facility for Microscopy and Microanalysis, Indian Institute of Science, Bengaluru 560 012, India., 3.The Hokkaido University Museum, Hokkaido University, Sapporo, Hokkaido 060-0810, Japan, 4.Research School of Earth Sciences, Australian National University, Canberra 2601, Australia, 5.Department of Geology, Faculty of Science, Niigata University, Niigata 950-2181, Japan, 6.Earthquake Research Institute, The University of Tokyo, Tokyo113-0032, Japan )

*Pahan Abewardana^1,2, Madhusoodhan Satish-Kumar¹, P.L. Dharmapriya², S.P.K. Malaviarachchi², Zhao Lei³ (1.GRADUATE SCHOOL OF SCIENCE AND TECHNOLOGY, NIIGATA UNIVERSITY, 2.POSTGRADUATE INSTITUTE OF SCIENCE, UNIVERSITY OF PERADENIYA, SRI LANKA, 3.INSTITUTE OF GEOLOGY AND GEOPHYSICS, CHINESE ACADEMY OF SCIENCE, CHINA)

*Claude Nambaje^1,2, Madhusoodhan Satish-Kumar¹, Ian S. Williams³, Toshiro Takahashi¹, Krishnan Sajeev⁴ (1.Niigata University, 2.University of Rwanda, 3.Australian National University, 4.Indian Institute of Science)

*Madhusoodhan Satish-Kumar¹, Fumiko Higashino², Tetsuo Kawakami², Tomokazu Hokada³ (1.Department of Geology, Faculty of Science, Niigata University, 2.Department of Geology and Mineralogy, Graduate School of Science, Kyoto University, Japan, 3.National Institute of Polar Research, Tachikawa, Japan)

*Abdulrahman Ahmadu¹, Madhusoodhan Satish-Kumar¹ (1.Graduate school of science and technology, Niigata University)