Qinghai;
Institute;
of;
Salt;
Lakes,;
Chinese;
Academy;
of;
Sciences,;
Xining;
810008,;
China;
Institute;
of;
Geochemistry,;
Chinese;
Academy;
of;
Sciences,;
Guiyang;
550002,;
China;
Institute;
of;
Geology,;
Chinese;
Academy;
of;
Geological;
Sciences,;
Beijing;
100037,;
China;
Graduate;
University;
of;
Chinese;
Academy;
of;
Sciences,;
Beijing;
100049,;
China;