Geochemical data on Cr-spinel in micrometeorites from modern Antarctic sedimentary deposits

This data repository contains back-scattered electron images for all 27 micrometeorites containing Cr-spinel studied in Van Maldeghem et al., 2024 (EPSL). The study analyzed Cr-spinel grains in a selection of micrometeorites from the Sør Rondane and Transantarctic Mountains (Antarctica) in order to determine their composition, formation and potential terrestrial alteration. We supply two geochemical datasets, both as excel spreadsheets. The first dataset (EMPA data) contains the electron microprobe data obtained using a JEOL JXA-8200 electron micro probe analyzer at the National institute of Polar Research (Tokyo, Japan). The second dataset contains the triple oxygen isotope ratios measured at the Centre de Recherches Pétrographiques et Géochimiques (Nancy, France).本数据集库包含Van Maldeghem等人2024年发表于《地球与行星科学快报》（EPSL）的研究中所涉及的全部27颗含铬尖晶石（Cr-spinel）的微流星体的背散射电子图像（back-scattered electron images）。该研究对采自南极瑟尔隆达内山脉与横贯南极山脉的部分微流星体中的铬尖晶石颗粒展开分析，以测定其成分、形成过程及潜在的陆地蚀变情况。本数据集库提供两份地球化学数据集，均以Excel电子表格格式存储。第一份数据集（电子探针微区分析（Electron Microprobe Analysis，EMPA）数据）包含使用日本国立极地研究所（National Institute of Polar Research，日本东京）的JEOL JXA-8200型电子探针分析仪获取的电子探针测试数据。第二份数据集包含在法国南锡岩石学与地球化学研究中心（Centre de Recherches Pétrographiques et Géochimiques）测得的三氧同位素比值数据。