1. Department of Earth Resources and Environmental Engineering, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul 04763, Korea.
2. Corresponding author.
3. Department of Geophysics, Kangwon National University, 1, Gangwondaehak-gil, Chuncheon-si, Gangwon-do 24341, Korea.
4. Department of Geology, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Korea.