Sm-Nd isotope data of bentonite samples (<2 µm fractions) from Svalbard and E...

Initial EpsilonNd (EpsilonNd(t)) calculated with 60 Ma for Basilika Formation bentonites and Lawson-ash 1 and 54 Ma for Lawson ash 2.巴西利卡组（Basilika Formation）膨润土与劳森火山灰1（Lawson-ash 1）的初始εNd值（Initial EpsilonNd，EpsilonNd(t)）以60 Ma计算，劳森火山灰2（Lawson ash 2）则以54 Ma计算。