(Table 4) Sr, Nd, Pb, and O isotope ratios and isotope dilution-determined trace element concentrations in ODP Site 136-843 basalts

O analyses performed at the University of Minnesota. All other analyses performed at the University of Hawaii (UH). O isotope ratios are normalized to SLAP (d18O VSMOW = -55.0 per mil) and reported relative to VSMOW. The d18O value for NBS-28 quartz on this scale is +9.5 ± 0.15 per mil. Isotopic fractionation correction for Nd is 148NdO/144NdO = 0.242436 (148Nd/144Nd = 0.241572); for Sr it is 8 6Sr/88Sr = 0.1194. Pb values are adjusted relative to the NBS 981 values of Todt et al. (1984). Nd isotopic data are reported relative to UH measured 143Nd/144Nd values for the La Jolla Nd standard of 0.511855 ± 0.000012 total range.Sr isotopic data are reported relative to UH measured 87Sr/86Sr values for NBS 987 of 0.71025 ± 0.00002 total range. Within-run uncertainties on sample Nd and Sr isotopic ratios are less than total ranges measured on La Jolla Nd and NBS 987 standards. Estimated uncertainty on 206Pb/204Pb is ± 0.010; on 207Pb/204Pb it is ± 0.009; and on 208Pb/204Pb it is ± 0.032; based on total ranges measured for NBS 981. Total blanks are: Pb = 5-40 pg, Nd < 20 pg, and Sr < 120 pg.