1. Research School of Earth Sciences; Australian National University; Canberra ACT 0200 Australia
2. Department of Geology; Faculty of Engineering; Hasanuddin University; Makassar 90245 South Sulawesi Indonesia
3. Department of Earth Resources Engineering; Graduate School of Engineering; Kyushu University; 744Motooka Nishi-ku Fukuoka 819-0395 Japan
4. Centre for Advanced Microscopy; Australian National University; Canberra ACT 0200 Australia
5. Department of Earth Science and Technology; Akita University; Akita 010-8502 Japan