Tungsten mineralization formed by single-pulsed magmatic fluid: Evidence from wolframite-hosted fluid inclusion from the giant Dajishan “Five Floor” style W-polymetallic deposit

•Primary wolframite-hosted fluid inclusions show decreased homogenization temperatures and constant salinities from bottom to top.•Wolframite-hosted fluid inclusion LA-ICP-MS result enables an investigation on spatial evolution of wolframite ore-forming fluids.•Preliminary calculation show that fluid-rock interaction contributes minor Fe to the ore-forming fluids.•Fluid cooling is the key factor of the wolframite precipitation.•Tungsten mineralization in Dajishan is caused by a single-pulsed magmatic fluid.