31b82864-1a24-5a17-e063-3050940af990 English nonGeographicDataset non geographic dataset British Geological Survey +44 115 936 3100 Environmental Science Centre,Keyworth NOTTINGHAM NOTTINGHAMSHIRE NG12 5GG United Kingdom enquiries@bgs.ac.uk pointOfContact 2026-04-15 UK GEMINI 2.3 http://data.bgs.ac.uk/id/dataHolding/13608397 X-ray tomography data and Electron Microprobe Analyses for natural mushy samples 2025-03-24 creation http://data.bgs.ac.uk/id/dataHolding/13608397 This dataset comprises X-ray tomography image stacks, label files, and vector matrices containing 3D location coordinates of velocity distributions derived from permeability simulations for igneous mushy samples. The X-ray tomography images have spatial resolutions ranging from 3.5 to 56 µm, providing detailed 3D representations of the rock samples. The data were collected with samples from four distinct locations: Brandur (Iceland), Avellino (Italy), K?lauea Iki (Hawaii, USA), and Saint Kitts (St. Kitts and Nevis). Additionally, the dataset includes electron microprobe analyses of plagioclase and amphibole minerals from Saint Kitts. The primary purpose of this dataset is to support research into volcanic processes, rock sample analysis, and permeability simulations in igneous cumulate and plutonic rocks. It is particularly useful for geologists, volcanologists, and researchers in material science and structural geology. Each sample in the dataset is organised into a dedicated folder containing the following X-ray tomography image stacks (in a separate folder named as the sample), label files (.am files named using the sample name as a prefix), binary images of the connected plutonic matrices (.am files with the suffix “Axis-Connectivity”), vector matrices with 3D location coordinates (“PotentialZ” for the pressure field, “VelocityZ” for the velocity field), a DOCX file with the metadata for the sample such as voxel size and the number of layers for each label, and, where applicable, a subfolder with SEM images. Alison Rust University of Bristol not available originator Enquiries British Geological Survey United Kingdom not available distributor Enquiries British Geological Survey United Kingdom not available pointOfContact notApplicable https://resources.bgs.ac.uk/images/geonetworkThumbs/31b82864-1a24-5a17-e063-3050940af990.png Geology GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Electron microscopy Tomography X rays Plutonic rocks Simulation Permeability BGS Thesaurus of Geosciences 2022 revision NGDC Deposited Data dataCentre NERC_DDC otherRestrictions licenceOGL Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]" otherRestrictions The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused. Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]" English geoscientificInformation 2019-11-04 2024-03-28 Image (TIFF) AM (.am) witheld Microsoft Excel (XLSX) witheld DAT witheld Microsoft Access (MDB) witheld Image (BMP) SIF (.sif) witheld Text file (TXT) witheld Microsoft Word (DOCX) witheld Enquiries British Geological Survey United Kingdom not available distributor https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item187497 WWW:DOWNLOAD-1.0-http--download Data download nonGeographicDataset non geographic dataset INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology 2011 publication See the referenced specification false Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 publication See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF false Rocks were imaged with X-ray microtomography scanners: Nikon XTH225ST (University of Bristol) or GE Phoenix v|tome|x M 240/180kV Dual Tube µCT (Smithsonian Institution, USA). Image stacks were processed using Avizo software to segment the phenocrysts phases, groundmass and pores. Phenocrystals and microcrystals of the same mineral phase are separated using Top-Hat technique. The outcome of the 3D segmentation is a label file with one layer per class (e.g. pores). Binary images were generated separating the palaeo-porosity (groundmass+pores) and the phenocrysts. An axis connectivity analysis separates the connected- from isolated palaeo-pores. The outcome of a permeability simulation through the connected palaeo-porosity is a vector matrix. Electron microprobe analyses of plagioclase and amphibole phenocrysts of three Saint Kitts samples were conducted with a JEOL JXA8530F EPMA.