Mineralogy of tin-sulfides in the Zijinshan porphyry-epithermal system, Fujian Province, China

摘要

The Zijinshan orefield is a Cu-Au-Mo-Ag porphyry-epithermal mineralization system of Cretaceous age in southeastern China, comprising the Zijinshan high-sulfidation (HS) Au-Cu deposit, Luoboling porphyry Cu-Mo deposits, Yueyang low-sulfidation Au-Ag-Cu deposit, and Wuziqilong and Longjiangting intermediatesulfidation (IS) Cu deposit. A number of Sn-(W)-sulfides occur in the Zijinshan orefield, including kiddcreekite, hemusite, colusite, vinciennite, stannoidite, mawsonite and kesterite. The occurrence represents the first report of hemusite, colusite and vinciennite in China. The relative abundance and diversity of Sn-(W)-sulfide-bearing assemblages make the Zijinshan orefield possibly unique in the world, and carries implications for the evolution of the mineralizing environment Detailed electron probe studies of the Sn-minerals reveal that kiddcreekite, hemusite, mawsonite, stannoidite and kesterite have compositions close to ideal formulae.