Data of silicon isotope of ocean island basalts

Table 1 includes Si isotope data for 80 OIB samples from five different regions around the world. Table S1 includes the major and trace element data as well as the radiogenic isotope data of these 80 samples. Among these samples, 37 samples from St. Helena, several Cook-Austral Islands (Rurutu, Tubuai, and Mangaia), and two islands of the Azores archipelago (São Jorge, Terceira) exhibit HIMU characteristics. Thirteen samples from three islands of Samoa (Ta’u, Ofu, and Savai’i) and 14 samples from São Miguel in the Azores exhibit variable EM Ⅱ characteristics (Fig. 1). Additionally, it also includes 16 samples from Hekla, Iceland, with a wide range of SiO2 contents.