The role of phyllosilicate partial melting in segregating tungsten and tin deposits in W-Sn metallogenic provinces

Abstract Most tungsten (W) and tin (Sn) deposits are associated with highly evolved granites derived from the anatexis of metasedimentary rocks. They commonly separated in both space time, rare cases where W Sn mineralization part a single deposit, two metals temporally separate. The factors controlling this behavior, however, not well understood. Our compilation whole-rock geochemical data for W- Sn-related major W-Sn metallogenic belts shows that generally products higher-temperature partial melting (~800 °C) than W-related (~750 °C). Thermodynamic modeling metal partitioning is incorporated into magma formed during low-temperature muscovite-dehydration melting, whereas most released at higher temperature biotite-dehydration melting; may be increased significantly if melt extracted prior to biotite melting. At same degree concentrations controlled by their concentration protolith. Thus, nature protolith subsequent evolution all influence potential and, combination, helped control spatial temporal segregation belts.