Combined La–Ce and Sm–Nd isotope systematics in petrogenetic studies

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

“…The chemical heterogeneity correlates with the heterogeneity in modal composition (rel ative abundances of minerals) of the powdered samples. In granitic rocks, rare earth elements (Tanaka et al, 1987), 143Nd / 144Nd = 0.512370, Crystalliza tion age=85 Ma (Ando et al, 1987). * The percentage of deviation of Sm/Nd ratio from the mean value.…”

“…The measurements were done with a double Re filament assembly , Nohda and Wasserburg (1981). b, Tanaka et al (1987). c, Kagami et al (1987).…”

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

“…Mass spec trometers used are as follows: VG micromass 54E in Kurasawa (1984) and Shirahase and Naka jima (1984); VG micromass 30-54R in Tanaka et al (1987); Varian MAT 260 in Kagami et al (1982); Varian MAT 261 in Kagami et al (1987) and Zhang Zichao (1987); and Hitachi RM 6 in Murozumi and Nakamura (1980) and Murozumi et al (1981).…”

Iron formations: A global record of Neoarchaean to Palaeoproterozoic environmental history

“…Sources of REE+Y and the fidelity of their signals have been investigated using the 138 Ce and 147 Nd isotope systems (e.g., Tanaka et al, 1982;Derry and Jacobsen, 1990;Shimizu et al, 1991;Hayashi et al, 2004;Viehmann et al, 2015;Haugaard et al, 2016). Both Ce and Nd have short residence times in the modern ocean, 90-165 and 1000-1500 years, respectively (Amakawa et al, 1996), and in the Archaean oceans these elements likely had a similar residence times on the order of 10 3 years, suggesting that Ce and Nd isotope compositions would be spatially heterogeneous.…”