Mineral chemistry dataset of the Carboniferous submarine basaltic volcanism of the Matachel Basin (SW Iberian Massif)
Description
Mineral chemistry characterization by means of Electron Microprobe analysis in 9 basaltic samples are presented. This dataset comprises a total of 501 mineral chemical analysis which correspond to plagioclase (208 analysis), clinopyroxene (202 analysis), amphibole (64 analysis), opaque minerals (18 analysis), and alkali feldspar (9 analysis).
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The initial sample processing was accomplished at the rock-sample preparation laboratories of the Geology Department at the University of the Basque Country (UPV/EHU). For the petrographic characterization and mineral chemistry data acquisition a number of rock thin sections (48 mm x 28 mm in size, and 30 μm thick) were prepared. Microscopic surveys were performed with a Leica DM LP device, fitted with a CCD camera for microphotographic image acquisition. Mineral major and trace elements concentrations were performed by means of Electron Microprobe analyses using a Cameca SX 100 instrument at the University of Oviedo. Operating conditions of the microprobe were: 10 s counting time (peak), ~10 nA beam current and 15 kV accelerating voltage. Calibration was done against French Geological Survey (BRGM) standard minerals and matrix correction factors (PAP) were used.