“…Pb isotopes play an important role in tracing various geological processes; for example, the Pb isotopic compositions of rocks and minerals have been applied to distinguish the magma sources from the sources of ore-forming materials during ore deposit formation, the impact of human activities on the environment and lake sediments, and the pollution sources in the atmosphere (Chang et al, 2000;Chang and Zhu, 1997;Chang and Zhu, 2002;Chang et al, 2003;Mil-Homens et al, 2013;Novak et al, 2012;Paul et al, 2014;Walraven et al, 2013a;Walraven et al, 2013b;Walraven et al, 2014a;Walraven et al, 2014b;Wang et al, 2013;Zhang and Wen, 2012;Zhu, 1998;Zhu, 1993;Zhu et al, 2010). In the ore deposit studies, Pb and S isotopes are extensively used for source-area analysis of ore-forming processes (Ding et al, 2013;Hou et al, 2006;Jiang et al, 2006;Zhao et al, 2007).…”