Geochronological and geochemical data of volcanic deposits of the Central Main Ethiopian Rift

This database represents a collection of geochronological data, geochemistry of bulk rocks and melt inclusions from a large set of samples collected in the framework of two field surveys (2019, 2020) in the Central Main Ethiopian Rift. This dataset provides supporting information to the paper:Franceschini Z., Cioni R., Scaillet S., Prouteau G., Corti G., Sani F., Mondanaro A., Frascerra D., Melaku A.A., Scaillet B., Oppenheimer C., Duval F. (2024) "Pulsatory volcanism in the Main Ethiopian Rift and its environmental consequences", Nature Communications Earth and Environment. The samples have been prepared for the different analyses at the Department of Earth Sciences of the University of Florence. The geochronological analyses building up the dataset have been performed at the Argon facility at the Institut des Sciences de la Terre d'Orléans (ISTO), in France. The analythical methods related to the 40Ar/39Ar analyses are described in detail in the above mentioned paper.The geochemical dataset contains the results of major and trace elements concentrations on whole rock samples (performed at the Service d'Anlayse des Roches et des Mineraux -CNRS - CRPG of Nancy, in France) and major elements and volatile concentrations of melt inclusions belonging to four ignimbrite samples (analysed with an Electron Micro Probe Analyzer housed at the laboratories of the Institut des Sciences de la Terre d'Orléans, in France). These datasets have been performed in the frame of a PhD fellowship (granted to Zara Franceschini) funded by the Università Italo Francese (Bando Vinci 2018, n. C3-1717) and also partially supported by the Italian Ministero dell'Università e della Ricerca (MiUR) through PRIN grant 2017P9AT72.本数据库收录了埃塞俄比亚主裂谷中部两次野外调查（2019年、2020年）所采集的大量样品的年代学数据、全岩地球化学数据及熔体包裹体数据。 本数据集为下述学术论文提供支撑数据：Franceschini Z.、Cioni R.、Scaillet S.、Prouteau G.、Corti G.、Sani F.、Mondanaro A.、Frascerra D.、Melaku A.A.、Scaillet B.、Oppenheimer C.、Duval F.（2024）《埃塞俄比亚主裂谷的脉动式火山活动及其环境影响》，《自然通讯·地球与环境（Nature Communications Earth and Environment）》。 所有样品的分析测试前制备工作均在佛罗伦萨大学地球科学系完成。构建本数据集的年代学分析工作，由法国奥尔良地球科学研究所（Institut des Sciences de la Terre d'Orléans, ISTO）的氩同位素实验室完成。与⁴⁰Ar/³⁹Ar分析相关的实验方法已在前述论文中详细说明。 本地球化学数据集包含两部分测试结果：一是全岩样品的主量与微量元素含量数据，测试工作由法国南锡岩石与矿物分析服务中心（Service d'Analyse des Roches et des Minéraux）-法国国家科学研究中心（CNRS）-南希地球科学与宇宙科学研究所（CRPG）完成；二是4个熔结凝灰岩（ignimbrite）样品的熔体包裹体主量元素与挥发分含量数据，该分析使用法国奥尔良地球科学研究所实验室的电子探针分析仪完成。 本数据集的相关研究工作依托于扎拉·弗朗西尼（Zara Franceschini）的博士奖学金项目，该项目由意法大学联盟（Università Italo Francese）资助（Vinci奖学金2018年度，编号C3-1717），并得到意大利大学与研究部（Ministero dell'Università e della Ricerca, MiUR）通过PRIN项目（编号2017P9AT72）的部分经费支持。