SR AND ND ISOTOPIC DATA FOR THE 7 GSJ ROCK REFERENCE SAMPLES - JA-1, JB-1A, JB-2, JB-3, JG-1A, JGB-1 AND JR-1

We measured Sr-87/Sr-86 and Nd-143/Nd-144 ratios and carried out analy tical test of Sr and Nd isotopic standards for the seven GSJ rock refe rence samples (hereafter GSJ-RRSs); JA-1, JB-1a, JB-2, JB-3, JG-1a, JG b-1 and JR-1. Our mean values of five separate analyses for the GSJ-RR Ss are summarized in Table 1, in agreement with the ranges of previous ly published data. Our mean values for 87Sr/86Sr ratios of JB-2 and JG b-1 and Nd-143/Nd-144 ratio of JR-1, however, show a slightly large Va riation as compared with the other JGS-RRSs. Further data accumulation with specification of split/position number is required to evaluate h omogeneity in Sr and Nd isotopic compositions.