Triaxial data, hydrostatic loading data, grain size image analysis data and processed representative elementary area (REA) for Bentheim, Castlegate and a synthetic sandstone sample

Dataset title	Triaxial data, hydrostatic loading data, grain size image analysis data and processed representative elementary area (REA) for Bentheim, Castlegate and a synthetic sandstone sample
Dataset creators	Elliot Rice-Birchall, University of Liverpool
Dataset theme	Geoscientific Information
Dataset abstract	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.
Dataset content dates	01/07/2021 to 01/04/2022
Dataset spatial coverage	N/A
Dataset supply format	csv, txt
Dataset language	English-United Kingdom
Dataset discovery metadata record	Discovery Link to the dataset's BGS Discovery Metadata record
Dataset publisher	NERC EDS National Geoscience Data Centre
Dataset publication date	08/06/2023
Dataset digital object identifier (DOI)	10.5285/b77e0e96-5123-4ae1-acfb-784083b05ad3
Dataset citation text	Rice-Birchall, E. (2023). Triaxial data, hydrostatic loading data, grain size image analysis data and processed representative elementary area (REA) for Bentheim, Castlegate and a synthetic sandstone sample. NERC EDS National Geoscience Data Centre. (Dataset). https://doi.org/10.5285/b77e0e96-5123-4ae1-acfb-784083b05ad3
Constraints and terms of use	This data set is available under Open Government Licence, subject to the following acknowledgement accompanying any reproduced materials: "Contains data supplied by permission of the Natural Environment Research Council [YEAR]".
Access the dataset	https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item179261
Further information	Data associated with the manuscript entitled: 'The effect of cement type on the occurrence and nature of compaction localisation in three high-porosity sandstones'.