Affiliation: | CHEN Duofu~1, Brian Marshall~2, Mark Bouffler~3 and T. Ho~3 1. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; 2. Department of Applied Geology, University of Technology, Sydney, New South Wales 2007, Australia; 3. Woodlawn Mines, PO Box 141 Goulburn, NSW 2580, Australia |