Identification

Title

X-ray tomography data and Electron Microprobe Analyses for natural mushy samples

Abstract

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.

Resource type

nonGeographicDataset

Resource locator

https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item187497

name: Data

function: download

Unique resource identifier

code

http://data.bgs.ac.uk/id/dataHolding/13608397

codeSpace

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

geoscientificInformation

Keywords

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

publication

effective date

2008-06-01

Keyword set

keyword value

Electron microscopy

Tomography

X rays

Plutonic rocks

Simulation

NGDC Deposited Data

Permeability

originating controlled vocabulary

title

reference date

date type

revision

effective date

2022

Keyword set

keyword value

Keyword set

keyword value

NERC_DDC

Geographic location

West bounding longitude

East bounding longitude

North bounding latitude

South bounding latitude

Temporal reference

Temporal extent

Begin position

2019-11-04

End position

2024-03-28

Dataset reference date

date type

creation

effective date

2025-03-24

Frequency of update

notApplicable

Quality and validity

Lineage

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.

Conformity

Conformity report

specification

title

reference date

date type

publication

effective date

2011

degree

false

explanation

See the referenced specification

Conformity report

specification

title

reference date

date type

publication

effective date

2010-12-08

degree

false

explanation

See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF

Data format

name of format

TIF (.tif)

version of format

Constraints related to access and use

Constraint set

Limitations on public access

Constraint set

Limitations on public access

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.

Responsible organisations

Responsible party

organisation name

University of Bristol

email address

not available

responsible party role

originator

Responsible party

organisation name

British Geological Survey

email address

not available

responsible party role

distributor

Responsible party

organisation name

British Geological Survey

email address

not available

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact

organisation name

British Geological Survey

full postal address

Environmental Science Centre,Keyworth

NOTTINGHAM

NG12 5GG

United Kingdom

telephone number

+44 115 936 3100

email address

enquiries@bgs.ac.uk

responsible party role

pointOfContact

Metadata date

2025-05-04

Metadata language