Table 2.

Whole rock Sm–Nd data for Akilia sample AK 12. (Whole rock sample powder was spiked with a mixed ¹⁴⁹Sm–¹⁵⁰Nd tracer and processed using conventional ion chromatographic methods. Isotope analyses were performed on a Micromass Isoprobe multicollector ICP MS at the Swedish Museum of Natural History, Stockholm, using a sample-standard bracketing method to correct for mass fractionation based on 5 analyses of in-house standard (Nd1) with a ¹⁴³Nd/¹⁴⁴Nd ratio of 0.51214. During the sequence of analyses of which AK 12 was a part, five analyses of the LaJolla Nd standard yielded an average ¹⁴³Nd/¹⁴⁴Nd ratio of 0.511846±0.000038 (2 s.d.). Depleted mantle model age is based on the model of DePaolo et al. (1991) and assumes the decay constant for ¹⁴⁷Sm of Lugmair & Marti (1978).)

sample	Sm (p.p.m.)	Nd (p.p.m.)	147Sm/144Nd	143Nd/144Nd	2 s.e. (%)	ϵNd(0)	tCHUR	tDM
AK 12	0.374	2.039	0.1107	0.510662	0.006	−38.6	3.48	3.63