(Table 2) Nd- and Pb-isotopic composition of basalts from DSDP/ODP Hole 504B@en

Pb-isotopic ratios are reported relative to values of 206Pb/204Pb=16.9322, 207Pb/204Pb=15.4855, and 208Pb/204Pb=36.6856 for the NBS-981 standard. Actual measured values for NBS-981 were 16.902 (+/-0.005), 15.443 (+/-0.006) and 36.549 +/-0.021) for 206Pb/204Pb, 207Pb/204Pb and 208Pb/204Pb respectively (n= 7)本研究报告的铅同位素比值，以NBS-981标准物质的参考值为基准：206Pb/204Pb=16.9322、207Pb/204Pb=15.4855、208Pb/204Pb=36.6856。NBS-981的实际测量比值分别为：206Pb/204Pb=16.902（±0.005）、207Pb/204Pb=15.443（±0.006）以及208Pb/204Pb=36.549（±0.021），对应测量次数n=7。