X-ray computed micro-tomography (XCT) 3D reconstructions of Icelandic gabbro nodules

X-ray computed tomography (XCT) was performed using a Carl Zeiss Xradia Versa-410 3D X-ray microscope at the Istituto Nazionale di Geofisica e Vulcanologia—Sezione di Napoli Osservatorio Vesuviano (INGV-OV), Naples, Italy. Scans were conducted in absorption mode, with 1601 projections acquired over a 360° rotation at 90 kV and 8 W, using an optical magnification of x0.4. This setup resulted in a nominal voxel size of 16.0918 μm.Data reconstruction was performed using XRMReconstructor, while vesicle and crystal geometries were characterized and quantified using Thermo Scientific™ Avizo v. 2019.1 and Fiji v1.54f. This research was conducted under the Trans-National Access action, supported by EXCITE - EC - HORIZON 2020 - INFRAIA 2020 Integrating Activities for Starting Communities (Grant Agreement No. 101005611). The diameter of each core is approximately 15mm. The phase colour key and the naming conventions are given below: Phase colour key:Plagioclase – CyanMafic minerals (Olivine ± Clinopyroxene) – OrangeGlass – GreenVesicles – GreyCr-spinel – BlackFigure naming convention: (A combination of letters indicates combination phases.)ALL – All phases combinedG – GlassM – Mafics (Olivine ± Clinopyroxene)O – Cr-spinelP – PlagioclaseV – VesiclesCon – Connected vesiclesIso – Isolated vesiclesLarge – Large vesiclesTiny – Tiny vesiclesTypeAll – All large vesicle types combinedType I, Type II, Type III – Different large vesicle types