Table 1 Stable isotopic fractionations of REEs in a geostandard and CAIs.

The δφE values are per mil/amu variations relative to terrestrial standards (OL-REEs) calculated using Eq. 1 applied to 142Ce/140Ce, 146Nd/144Nd, 152Sm/148Sm, 153Eu/151Eu, 158Gd/156Gd, 164Dy/162Dy, 168Er/166Er, and 174Yb/172Yb ratios.

Isotopic fractionation (%/amu)
SampleCAI
name
δϕCe#*δϕNd#*δϕSm#*δϕEu#*δϕGd#*δϕDy#*δϕEr#*δϕYb
BCR-20.02±0.0110−0.01±0.02150.00±0.0190.01±0.0340.02±0.03100.02±0.038−0.05±0.0280.02±0.05
TS320.24±0.061−0.03±0.054−0.01±0.062−0.19±0.052−0.02±0.032−0.02±0.073−0.02±0.1320.04±0.07
ME-3364-25.2FG-FT-30.01±0.049−0.14±0.019−0.09±0.065−1.09±0.051−0.89±0.031−1.04±0.071−1.00±0.021−0.33±0.07
ME-2639-16.2FG-FT-40.81±0.04121.1±0.0180.8±0.063−0.01±0.052−0.61±0.032−0.58±0.062−2.89±0.111−0.12±0.07
ME-2639-49.7FG-FT-6−0.03±0.029−0.57±0.085−0.37±0.062−0.42±0.021−1.03±0.073−1.67±0.043−2.02±0.051±
ME-2639-51.1FG-FT-70.42±0.039±0.07±0.065−0.58±0.051−1.28±0.033−1.64±0.072−2.24±0.021−0.66±0.07
AL3S5FG-FT-80.51±0.019−0.02±0.0380.07±0.0190.04±0.112−2.26±0.019−3.07±0.019−1.89±0.1120.01±0.05
AL4S6FG-FT-9−0.82±0.019−0.93±0.0211−0.97±0.0290.73±0.046−1.05±0.075−1.10±0.0270.08±0.046−0.32±0.01
AL8S2FG-FT-100.35±0.055−0.16±0.083−0.03±0.051−1.03±0.111−0.35±0.072−0.53±0.041−3.63±0.051±
ME-2639-16.2FG-FT-40.96±0.0750.68±0.0480.88±0.0650.03±0.064−0.57±0.036−0.55±0.026−2.90±0.112−0.12±0.05
AL3S5FG-FT-80.70±0.018−0.01±0.01150.11±0.01110.13±0.063−2.28±0.0210−3.08±0.028−1.88±0.112−0.05±0.15
AL4S6FG-FT-9−0.62±0.075−0.87±0.0113−0.84±0.0270.82±0.063−1.05±0.194−1.15±0.0650.01±0.115−0.32±0.02

*Number of measurements.

†Replicates subjected to substantial loss of REEs during Mo chemistry and not used for data interpretation.