This dataset is a database of geochemical data, especially isotope analysis, for a selection of Roman denarii. The selection was primarily based on numismatic criteria. The focus is on denarii from the late Republic until the reign of Severus Alexander (220 CE) found in Germany. The data were collected as part of the first author's PhD thesis (T. Greifelt), with interpretation to follow in the completed thesis. A total of 213 denarii were sampled through several campaigns between 2017 and 19 from four collections including the LWL Museum für Kunst und Kultur Münster; the hoards from Hanau-Kesselstadt, Hanauer Geschichtsverein, Historisches Museum Hanau Schloss Philippsruhe; Regensburg-Kumpfmühl, Historisches Museum Regensburg; and coins from the Varusschlacht-Museum and Park Kalkriese. Sampling was carried out via drilling. The chemical preparation adhered to standard geochemical workflows adapted for archaeometric analysis. Analysis methods included EPMA and MC-ICP-MS. In this initial version of the publication, a data file with isotope results and detailed metadata is provided in .csv format. A subsequent version will include a second file with the elemental composition of the coins. The metadata profile of TerraLID (https://metadata.terralid.org/latest/pdf/TerraLID_Metadata_Profile.pdf ) was followed, which was specifically designed for applying (lead) isotope and elemental analysis to archaeological material. Geochemically obtained isotope and elemental data are used in archaeometallurgy to identify metal sources exploited in the production of ancient materials such as metal, glass, pigments, and others.
Cutting samples of 23 geological formations from different depths (measured depth, MD) between 1.4 and 4.4 km of the geothermal research well Groß Schönebeck site were analyzed with focus on lithium (Li), copper (Cu), and strontium (Sr).
To determine how strong and to which components these critical raw materials (CRM) are bound within the rocks, leaching and sequential extraction experiments were performed on five selected formation rock samples that are considered either for geothermal exploitation (Muschelkalk, Buntsandstein, Rotliegend sandstone) and/or as potential source for the CRM Li, Cu, Sr from the Permo-Carboniferous volcanic rocks and/or the Ohre anhydrite. In addition, electron probe micro analyses (EPMA) and laser ablation ICP-OES was performed on thin sections of the Rotliegend formation.
This work presents a Global dataset for combined mineral major and trace element data for rocks from the lower oceanic crust sampled along mid-ocean ridges worldwide. The dataset compiles mineralogical and geochemical data obtained from samples recovered along mid-ocean ridges characterized by a wide range of spreading rates, from fast-spreading to ultra-slow spreading ridges. It integrates published data from the scientific literature concerning the main mafic minerals of the lower oceanic crust, particularly olivine, plagioclase, and clinopyroxene, together with geological and geographical information related to the analysed samples.
For each sample, the dataset includes details such as sampling location, oceanographic cruise, bibliographic reference, geographic coordinates, spreading rate, and sample lithology. The different worksheets contain average major element compositions and, where available, trace element data measured on crystal cores and rims. The dataset includes concentrations of major oxides, petrological parameters such as Fo# and Mg#, as well as trace element and rare earth element concentrations.
The dataset was developed as a supporting tool for petrological, geochemical, and geodynamic studies aimed at improving the understanding of magmatic processes and the evolution of the lower oceanic crust along oceanic spreading centres.