Mineral chemistry dataset of the Tournaisian-Lower Vis?an submarine basaltic volcanism of the Matachel Basin (SW Iberian Massif)

The Matachel Basin is a tectono-stratigraphic unit of Ossa-Morena Zone (southern Iberian Massif) that encompasses an Upper Tournaisian - Visean basaltic sequence, gen-erated by effusive and explosive eruptions in a shallow submarine setting. A collection of 23 basaltic and gab-broic samples were selected for detailed petrographic de-scriptions, which included a mineral chemistry character-ization by means of Electron Microprobe analysis in 9 rock samples. In this contribution a total of 501 mineral chemical data are presented, which correspond to plagio-clase (208 analysis), clinopyroxene (202 analysis), amphi-bole (64 analysis), opaque minerals (18 analysis), and al-kali feldspar (9 analysis). According to mineral classification diagrams analyzed rock samples are composed by albite-labradorite (An01-66), augite (Wo31-41 En32-49Fs7-22), magnesio-hornblende, ferrohornblende, ferropargasite, titanian magne-siohastingsite, orthoclase (Or93-97), titanomagnetite, and il-menite. Presented dataset provides a robust information of the nature of the outpouring lava emissions in shallow -marine intra-continental basins, and would enhance a better understanding of eruptive dynamics in this type of tectonic settings.(c) 2022 The Author(s). Published by Elsevier Inc. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ )

Automated summary

The Matachel Basin in the Ossa-Morena Zone of the southern Iberian Massif contains a basaltic sequence generated by volcanic eruptions in a shallow submarine environment. Detailed petrographic descriptions and mineral chemistry characterization were conducted on selected samples, providing a robust dataset of 501 mineral chemical data. The analysis revealed the presence of various minerals such as plagioclase, clinopyroxene, amphibole, opaque minerals, and alkali feldspar, shedding light on the nature of volcanic eruptions in shallow marine basins.