U–Pb geochronology, geochemistry, and H–O–S–Pb isotopic compositions of the Leqingla and Xin'gaguo skarn Pb–Zn polymetallic deposits, Tibet, China

•Mineralization ages for the Leqingla and Xin'gaguo deposits are 60.8 and 56.5Ma, respectively.•Both the Leqingla and Xin'gaguo deposits were formed on the geological setting of the India–Asia continental collision.•Ore-forming metals for these two deposits were sourced from the Neo-Tethys Ocean slab and the Lhasa terrane basement.