Triaxial data, hydrostatic loading data and processed representative elementary area (REA), grain size image analysis data for Bentheim, Castlegate and a synthetic sandstone sample (NERC Grant NE/L002469/1)
We examine the role of cement on compaction band formation by performing triaxial tests on three sandstones, Bentheim, Castlegate and a synthetic sandstone which possess very similar porosities (~26-29%) and grain sizes (~230-300 µm), but which are cemented differently, with syntaxial quartz overgrowths, clay, and amorphous quartz cement respectively. Each sample was taken to 5% axial strain at a starting effective stress equivalent to 85% of its hydrostatic yield (P*) value, which were identified from yield under hydrostatic loading. These data for the 3 samples are presented as matlab data files. Post-deformation, each of the 3 cores underwent backscatter SEM and subsequent image analysis to examine any localised variations in porosity and grain size. These data are presented as csv files. Discrete bands form in each of the 3 sandstones but are distributed differently across each sample. Our results suggest that cement type plays a significant role in the micromechanics of deformation within each of the sandstones, which in turn, determines where the compaction bands nucleate and develop. These results may provide a starting point to investigate the role of cement on compaction localisation further.
nonGeographicDataset
https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item179261
name: Data
function: download
https://doi.org/10.5285/b77e0e96-5123-4ae1-acfb-784083b05ad3
name: Digital Object Identifier (DOI)
function: information
http://data.bgs.ac.uk/id/dataHolding/13608080
eng
geoscientificInformation
publication
2008-06-01
Cements
Compaction
Compression tests
NGDC Deposited Data
Sandstone
Pore pressure
Porosity
revision
2022
NERC_DDC
2021-07-01
2022-04-01
creation
2023-06-01
notApplicable
Triaxial tests were conducted on three sandstones using a high-pressure apparatus. Argon was used as the pore fluid. Confining pressure and axial load were controlled and measured with high precision. Yield strengths were determined by monitoring changes in pore volume. A stress-probing method mapped yield curves. Deformation experiments were performed on new samples at 85% of the yield strength. Microstructural analysis involved impregnation with epoxy resin and SEM imaging. Porosity and grain size distribution were analyzed, showing percentage reduction in grain size from the initial state.
publication
2011
false
See the referenced specification
publication
2010-12-08
false
See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF
csv
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.
School of Environmental Sciences
University of Liverpool
Liverpool
L69 3GP
originator
British Geological Survey
distributor
British Geological Survey
pointOfContact
British Geological Survey
Environmental Science Centre,Keyworth
NOTTINGHAM
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United Kingdom
+44 115 936 3100
pointOfContact
2024-04-18