Isotopic data and rare gas compositions of GSJ rock reference samples, "Igneous rock series", 1988.

87Sr/86Sr and 143Nd/144Nd ratios of GSJ rock reference samples; JB-1a, JA-1 and JG-1a.

“…The 87Sr /86 Sr ratio of JG-1 a (0.71097, Table 1) is very close to one of the two data (0.71098 and 0.71104) reported in Ando and Shibata (1988) and the value of 0.71098 by Okano et al (1989). Our value of the 87Sr/86Sr ratio of JG-la is slightly higher than those of JG-1 reported in Ando and Shibata (1988) including the value of 0.71090 by Kagami et al (1982).…”

“…The reference samples JB-1a and JB-1 were made from the same stock chips (Ando et al, 1987) and are expected to have similar Sr isotope ratios. However, our value for JB-la is considerably lower than many data for JB-1 complied by Ando and Shibata (1988), ex cept for the data of 0.70411 by our own (Kagami et al, 1982).…”

“…The 87Sr/86Sr ratio of JB-la obtained by us (0.70408, Table 1) is considerably lower than those (0.70420 and 0.70435) shown in Ando and Shibata (1988), but identical to 0.70408 of Okano et al (1989). The reference samples JB-1a and JB-1 were made from the same stock chips (Ando et al, 1987) and are expected to have similar Sr isotope ratios.…”

“…The 87Sr/86Sr ratio of JA-1 (0.70351, Table 1) is within the range of rather large variation of the reported data from 0.70325 to 0.70367 (Ando and Shibata, 1988).…”

143Nd/144Nd ratios of twelve GSJ rock reference samples and reproducibility of the data.

“…The determination of isotope com positions of standard rock samples is particu larly important for checking the precision of data and for interlaboratory comparison of the data. For 87Sr/86Sr ratios of the GSJ (Geological Survey of Japan) rock reference samples, many data have been accumulated and their evaluation has been made (Ando et al, 1987;Ando and Shibata, 1988;Kagami et al, 1989). However there is not enough data for 143Nd/ 144Nd ratios of the GSJ rock reference samples.…”