Table 1.

Sm and Hf isotopic composition. Sm fractionation corrected to ¹⁴⁷Sm/¹⁵²Sm=0.56081, Hf to ¹⁷⁹Hf/¹⁷⁷Hf=0.7325 with ¹⁷⁶Hf/¹⁷⁷Hf reported relative to 0.282160 for the JMC-475 Hf standard. Spike-corrected ratios reflect the values after stripping spike contribution, but the primary spiked isotope ratios (¹⁴⁹Sm/¹⁵²Sm and ¹⁷⁸Hf/¹⁷⁷Hf) are reported as measured. ε is the deviation in parts in 10 000 from the value of the ratio in the standard.

	144Sm/152Sm	148Sm/152Sm	149Sm/152Sm	150Sm/152Sm	154Sm/152Sm	n
standard (DTM)	0.114946	0.420419	0.516840	0.275981	0.850812	2
2σ	0.000015	0.000010	0.000011	0.000008	0.000012
standard (LLNL)	0.114997	0.420438	0.516853	0.275993	0.850792	54
2σ	0.000007	0.000013	0.000001	0.000005	0.000026
						ε149Sm	ε150Sm
unspiked 77215 (DTM)	0.114968	0.420444	0.516841	0.276036	0.850795	0.02	2.00
2σ	0.000003	0.000004	0.000005	0.000003	0.000008	0.09	0.11
78238 (LLNL)	0.114986	0.420446	0.515437	0.277383	0.850658	−27.4	50.8
2σ	0.000002	0.000003	0.000003	0.000002	0.000005	0.06	0.07
spike corrected
77215WR	0.114973	0.420440	0.911588	0.276084	0.850760	7638	3.73
77215Px	0.114962	0.420421	0.780324	0.275978	0.850758	5098	−0.11
77215Pl	0.114985	0.420434	0.720466	0.276051	0.850735	3940	2.53
67667	0.114971	0.420432	0.827814	0.276177	0.850772	6017	7.10
76355	0.115005	0.420428	0.810244	0.276660	0.850594	5677	24.61
78238	0.114979	0.420449	0.777587	0.277428	0.850697	5045	52.42
	174Hf/177Hf	176Hf/177Hf	178Hf/177Hf	180Hf/177Hf	ε180Hf
standard	0.008653	0.282138	1.467481	1.886825
2σ	0.000006	0.000010	0.000051	0.000079	0.42
spike corrected
77215WR	0.008658	0.282778	1.504768	1.886893	0.36
77215Px	0.008647	0.282601	1.569252	1.886919	0.50
77215Pl	0.008633	0.281421	1.477830	1.886838	0.07
76355	0.008663	0.281029	1.499380	1.886738	−0.46
78238	0.008661	0.282554	1.536428	1.886611	−1.13
67667	0.008655	0.282187	1.515238	1.886896	0.38