GEOLOGY AND RESOURCES  1999, Vol. 8 Issue (3): 185-187 DOI: 10.13686/j.cnki.dzyzy.1999.03.009 |
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| Toru Shimizu1, Hiroharu Matsueda1, Daizo Ishiyama2, Osamu Matsubaya3 | |||
| 1. Department of Earth and Planetary Sciences, Faculty of Science, Hokkaido University, Japan; 2. Department of Geosciences, Mining Engineering and Material Processing, Mining College, Akita University, Japan; 3. Research Institute of Materials and Resources, Mining College, Akita University, Japan |
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