Timing of the formation of the Baiyinnuo’er skarn Zn–Pb deposit, NE China: evidence from sulfide Rb–Sr dating - Yixin Li; Qihai Shu; Xudong Niu; Fan Yu; Qingwen Zeng; Liangmin Wei; Yang Xiao; Xianglin Dai (Acta Geochimica, 2022)