Average chemical compositions of onshore tephras including major elements and trace elements (Table 2a)

In table 2a average major and trace element compositions are given for analyses correlative land tephras. Average EMP major and LA-ICPMS trace element compositions for terrestrial samples with: Sample names, unnormalized oxides of Na2O, K2O, FeOt, SiO2, TiO2, MgO, CaO, MnO, Al2O3, P2O5, total and normalized values to 100% volatile free with the same order of element oxides and trace elements. Last column indicates number of individual measurements per average with Electron microprobe and Laser ICPMS.表2a列出了与陆相火山灰相关的分析样品的主量元素与微量元素平均组成。 本次公开的陆相样品主量元素与微量元素平均组成数据，包含电子探针（Electron Microprobe, EMP）主量元素组成与激光剥蚀电感耦合等离子体质谱（LA-ICPMS）微量元素组成，具体信息如下：样品名称、未标准化的Na₂O、K₂O、FeOt、SiO₂、TiO₂、MgO、CaO、MnO、Al₂O₃、P₂O₅氧化物组分及总氧化物含量，同时提供脱挥发分后归一化至100%的数值，元素氧化物与微量元素的排列顺序保持一致。最后一列标注了每组平均值对应的电子探针与激光ICPMS单次独立测量次数。