[1] Graz Univ Technol, Inst Appl Geosci, A-8010 Graz, Austria
[2] Kyushu Univ, Dept Chem, Fukuoka 8108560, Japan
[3] Univ Chile, Dept Geol, Santiago, Chile
[4] Univ Michigan, Dept Geol Sci, Ann Arbor, MI 48109 USA
[5] CESRE, CSIRO, Kensington, WA 6151, Australia