10.5880/fidgeo.2025.023 eng dataset GFZ German Research Centre for Geosciences datapub@gfz-potsdam.de http://www.gfz-potsdam.de Helmholtz-Centre Potsdam - GFZ German Research Centre for Geosciences Helmholtz-Centre Potsdam - GFZ German Research Centre for Geosciences pointOfContact 2025-08-27 urn:ogc:def:crs:EPSG:4326 3D microXCT scans of 1mm pumiceous clasts from Rungwe Pumice eruption deposit (Tanzania) 2025-08-27 revision 2024-04-10 creation doi:10.5880/fidgeo.2025.023 Cappelli, Lorenzo Department of Geosciences, Environment and Society; Université libre de Bruxelles; Bruxelles, 1050, Belgium author Buono, Gianmarco Istituto Nazionale di Geofisica e Vulcanologia, Italy author Pappalardo, Lucia Istituto Nazionale di Geofisica e Vulcanologia, Italy author Fontijn, Karen Department of Geosciences, Environment and Society; Université libre de Bruxelles; Bruxelles, Belgium author Ernst, Gerald G.J. author van Gerve, Thomas Department of Earth and Environmental Sciences, KU Leuven, Leuven, Belgium author Namur, Olivier Department of Earth and Environmental Sciences, KU Leuven, Leuven, Belgium author Sielenou, Vanessa N. Department of Geosciences, Environment and Society; Université libre de Bruxelles; Bruxelles, Belgium author Mbede, Evelyne School of Mines and Geosciences; University of Dar es Salaam; Dar es Salaam, Tanzania author Edista, Abdallah School of Mines and Geosciences; University of Dar es Salaam; Dar es Salaam, Tanzania author Kwelwa, Shimba AngloGold Ashanti, Tanzania author Micro-CT laboratory (INGV, Italy) INGV, Naples, Italy originator GFZ Data Services publisher The dataset comprises 3D micro XCT scans collected with a ZEISS Xradia Versa 410 at the Istituto Nazionale di Geofisica e Vulcanologia-Osservatorio Vesuviano (Italy). Samples are ash particles within the 0/-0.5 φ (1-1.4 mm) grain size range collected from different stratigraphic horizons (C, F, I, L, O) of the type section (KF176) of the 4ka Rungwe Pumice Plinian eruption (Tanzania). A total of 4001 bidimensional X-ray absorption projections were collected during a 360° rotation of the sample at 80 kV and 7 W. For each sample a scan was collected using a 10x magnification lens, additionally, for specific samples, a further scan with a 20x lens was also collected at 150 kV and 10 W. The pixel size results in 2 µm/px (8 µm^3/voxel) for samples scanned with 10x lens and 1.1 µm/px (1.3 µm^3/voxel ) for samples scanned with 20x lens. When necessary, a low-energy (LE1) filter was used to minimise beam hardening. The scans were then reconstructed into tomographic volumes using the integrated XRM Reconstructor software. Cappelli, Lorenzo Department of Geosciences, Environment and Society; Université libre de Bruxelles; Bruxelles, 1050, Belgium PhD cappellilorenzo93@gmail.com pointOfContact Rungwe Pumice eruption Pyroclastic textures Plinian eruption Vesicle textures EPOS multi-scale laboratories geochemistry and microscopy geochemistry data compound material > rock > igneous rock > fragmental igneous rock > pyroclastic rock > ash tuff lapillistone and lapilli tuff compound material > rock > igneous rock > glass rich igneous rock > glassy igneous rock CGI Simple Lithology publication EARTH SCIENCE > SOLID EARTH > GEOMORPHIC LANDFORMS/PROCESSES > TECTONIC LANDFORMS > VOLCANO EARTH SCIENCE > SOLID EARTH > TECTONICS > VOLCANIC ACTIVITY > ERUPTION DYNAMICS > ASH/DUST COMPOSITION EARTH SCIENCE > SOLID EARTH > TECTONICS > VOLCANIC ACTIVITY > ERUPTION DYNAMICS > MAGMA COMPOSITION/TEXTURE EARTH SCIENCE > SOLID EARTH > TECTONICS > VOLCANIC ACTIVITY > ERUPTION DYNAMICS > MAGMA SPEED/FLOW EARTH SCIENCE > SOLID EARTH > TECTONICS > VOLCANIC ACTIVITY > ERUPTION DYNAMICS > PYROCLASTICS COMPOSITION/TEXTURE EARTH SCIENCE > SOLID EARTH > TECTONICS > VOLCANIC ACTIVITY > ERUPTION DYNAMICS > VOLCANIC EXPLOSIVITY NASA/GCMD Earth Science Keywords publication CC BY 4.0 CC BY 4.0 10.31223/X5RB12 DOI IsSupplementTo 10.1016/j.jvolgeores.2010.07.021 DOI Cites 10.1007/s00445-011-0486-8 DOI Cites eng geoscientificInformation Location of the Rungwe Pumice type section KF176 sampled in 2008 33.7169 33.7169 -9.20539 -9.20539 http://doi.org/10.5880/fidgeo.2025.023 WWW:LINK-1.0-http--link Data Access - DOI Data Access - DOI information