Influences of Hydraulic Fracturing on Fluid Flow and Mineralization at the Vein-Type Tungsten Deposits in Southern China

Figure 1

Photos of wolframite-quartz veins at two tungsten deposits in the Nanling Range. (a) Tabular wolframite has grown symmetrically normal to the walls of a thick vein at the Dajishan deposit [28]. View to upwards. (b) Needle-like wolframite crystallizes normal to the wallrock at the Piaotang deposit. View to upwards. Qz, quartz; Wol, wolframite.