Ore genesis of the Narenwula quartz-vein type W polymetallic deposit in the southern Great Xing’an Range W belt, NE China: Constraints from wolframite geochronology and individual fluid inclusion analysis

•Wolframite in-situ U-Pb dating yields a W mineralization age of 136.4 ± 2.0 Ma.•Ore fluids originated from an underlying, geochemically uniform granitic magma.•Fluid immiscibility and fluid-rock reaction are vital for wolframite precipitation.•Fluid mixing is the dominant mechanism for sulfides precipitation.