1. Department of Astronomy, Space Science and Geology, Chungnam National University, Daejeon, South Korea
2. Department of Geology and Earth Environmental Sciences, Chungnam National University, Daejeon, South Korea
3. Department of Geography & Anthropology, Louisiana State University, Baton Rouge, LA, USA
4. Convergence Research Center for Development of Mineral Resources (DMR), Korea Institute of Geoscience and Mineral Resources, Daejeon, South Korea