Composition and evolution of ore-forming fluids in the Sansheng porphyry W-Mo deposit, Inner Mongolia, NE China: Evidence from LA-ICP-MS analysis of fluid inclusions

•Ore fluids originated from the geochemically uniform Sansheng granitic magma.•Fluid boiling and fluid-rock interaction are responsible for W-Mo mineralization.•Fluid mixing is the dominant mechanism for Cu-Pb-Zn mineralization.