This paper reports new zircon U-Pb ages,and Hf isotope and whole-rock major and trace element data for Cambrian plagiogranites from the Tuobeiling ophiolite in
Platinum-group elements(PGE) in PGE-rich porphyry copper(gold) deposits are mainly Pt and Pd,whereas the concentrations of other PGE(Ru,Rh,Os,Ir) are significan