Geochemical types of vein wolframite deposits in Nanling Region

In accordance with the characteristics of associated minerals, trace elements in the altered rocks around the veins and the compositions of wolframite and mica, the vein wolframite deposits in the Nanling Region can be divided into two geochemical types: the wolframite-berylmolybdenite-bismutite (native bismuth) type and the wolframite-cassiterite-sulfide (copper, zinc, lead) type. Vein wolframite deposits of these two geochemical types were formed under different geological conditions. The wolframite-beryl-molybdenite-bismutite (native bismuth) type may be connected with high pH-Eh conditions, whereas the wolframite-cassiterite-sulfide (copper, zinc, lead) type with low pH-Eh conditions. It is concluded that the two geochemical types of vein wolframite deposit are genetically related to two different geochemical types of granite in the Nanling Region.