Zircon Hf isotope analysis by means of LA-MC-ICP-MS

Hf isotopic compositions of four standard zircons,i.e.,GJ-1,Temora,91500 and Mud Tank,were analyzed using MCICPMS(Neptune) coupled with excimer laser ablation system(New Wave 193nm FX).The 176Hf/177Hf ratios obtained are 0.282006± 24(n=159,2SD) for GJ-1,0.282684±46(n=20,2SD) for Temora,0.282305±32(n= 20,2SD) for 91500,and 282509±25(n=48,2SD) for Mud Tank respectively.The results are in excellent agreement with the previously reported data.