High intermediate precision Sm isotope measurements in geological samples by MC-ICP-MS

Abstract

Measurements for Sm isotopes in geological materials have been challenging, limiting their extensive applications in geoscience and environmental science. Herein, we developed a technique for high intermediate precision analysis of...

Determination of Rare Earth Element Isotopic Compositions Using Sample-Standard Bracketing and Double-Spike Approaches

“…Ce, Nd, Sm, and Eu isotope fractionations analyzed in this study compared to literature values relative to OL-REE. Ce: refs − ; Nd: refs , , , and − ; Sm: ref ; Eu: refs and .…”

“…There has been a growing interest in stable isotope analyses of rare earth elements (REEs), including Ce, ,,,,− ,− Nd, ,,− ,,,− ,− Sm, ,, Eu, ,,− Gd, Dy, Er, , and Yb. , …”

“…Since the reference materials used in the literature and the OL-REEs were different, we normalized published isotopic data to OL-REEs using BCR-2 and BHVO-2 that were measured here and in previous studies. All the analyzed Ce and Nd isotopes were subtracted by the difference of BCR-2 in the OvSp group and BCR-2 analyzed in Bai et al 52 Samarium isotopes were subtracted by the difference of BCR-2 in the OvSp group and Bai et al 34 Due to the relatively low precision of the reported BCR-2 value, Eu stable isotopes were subtracted by the difference of BHVO-2 in the NonSp group and Lee and Tanaka. 35 Our measurements in this study are overall consistent with previously reported values except for Nd isotopes in NOD-A-1 with a difference of ∼0.05‰/amu.…”

“…There has been a growing interest in stable isotope analyses of rare earth elements (REEs), including Ce, 16,18,28,29,52−54,61−63 Nd, 16,25,30−32,52,55,57−59,64−66 Sm, 16,33,34 Eu, 16,26,35−37 Gd, 16 Dy, 16 Er, 16,38 and Yb. 16,38 Europium displays notable variations in isotope fractionation during magmatic processes, ranging from about −0.150‰/amu to 0.100‰/amu.…”

“…Expanding the database of REE stable isotopic fractionation by investigating extraterrestrial samples, low-temperature samples, and high-temperature samples influenced by NFS and kinetic effects would improve our understanding of the geochemical behavior of REEs in diverse environments. Reported REE isotope fractionations are still relatively limited (Ce, ,, Nd, ,− Sm, ,, Eu, ,,− Gd, Dy, Er, , and Yb , ), with most publications focused on developing analytical methods for one or two REEs, and the samples analyzed are primarily geostandards and igneous rocks.…”