Abstract
Tin-polymetallic deposits, with a characteristic elemental association of Sn, Cu, Pb, Zn, Au, Ag and sometimes Fe, W and Mo, are widespread in the Nanling region, South China. Like W-Sn-Nb-Ta-Be(REE) deposits, they are commonly associated with acid granites. Therefore, it has long been considered that tin-bearing granitic magma derived from anatexis in the tin-rich belt in the sial crust is the only source of primary tin mineralization, including the tin-polymetallic deposits discussed in this paper. Genetically they are related to the continental crust-reworked (I-type and S-type) granites.
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