Sm-Nd isotope data of whole-rock bentonite samples from Svalbard (including C...

Initial EpsilonNd (EpsilonNd(t)) calculated with 60 Ma for Basilika Fm. bentonites and Lawson-ash 1 and 54 Ma for Lawson ash 2.初始εNd值（EpsilonNd(t)）的计算中，针对Basilika组（Basilika Fm.）斑脱岩与Lawson火山灰1，采用60 Ma作为年龄参数；针对Lawson火山灰2，则采用54 Ma作为年龄参数。