Electron micro probe analyser (EMPA) glass standard measurements associated with glass geochemistry data of cryptotephra from Baltic Sea sediment cores EMB201/13-4 and POS507/29-2@en

This dataset provides the data for the four glass standards used for monitoring the precision and accuracy of electron probe microanalyses (EPMA) during analytical runs of cryptotephra glass shards in sediment cores EMB201/13-4 and POS507/29-2. For each EPMA run, all four glass standards were measured. The major element composition of the glass standards was measured using a JEOL JXA-8230 electron microprobe at GFZ Potsdam, Germany (15 kV, 10 nA, 5-10 µm beam size). Instrumental calibration used natural mineral standards. Glass standards were Lipari obsidian (Hunt & Hill 1996; Kuehn et al. 2011) and MPI-Ding glasses ATHO-G, StHs-6-80-G and GOR-132-G (Jochum et al. 2006).本数据集提供了沉积物岩芯EMB201/13-4与POS507/29-2中隐火山玻璃碎屑的电子探针显微分析（electron probe microanalyses, EPMA）过程中，用于监测分析精度与准度的4种玻璃标准物质相关数据。每一轮EPMA分析均对全部4种玻璃标准物质开展测定。玻璃标准物质的主量元素组成通过德国波茨坦地球科学研究中心（GeoForschungsZentrum Potsdam, GFZ）的JEOL JXA-8230型电子探针微分析仪完成测试，测试参数设置为加速电压15 kV、束流10 nA、束斑尺寸5~10 μm。仪器校准采用天然矿物标准物质。本次使用的玻璃标准物质包括利帕里黑曜岩（Lipari obsidian, Hunt & Hill 1996; Kuehn et al. 2011）以及MPI-Ding系列玻璃标样ATHO-G、StHs-6-80-G与GOR-132-G（Jochum et al. 2006）。