The State Key Laboratory of Environmental Geochemistry;
Institute of Geochemistry;
Chinese Academy of Sciences;
Guiyang 55002;
China;
University of Chinese Academy of Sciences;
Beijing 100049;
China;
Institute of Surface-Earth System Science;
TianjinUniversity;
Tianjin 300072;
China;
Center for Environmental Remediation;
Institute ofGeographic Sciences and Natural Resources Research;
Chinese Academy of Sciences;
Beijing 100101;
China;
Sulfur isotope; Oxygen isotope; Riverine sulfate; Carbonate weathering; Xijiang River;