ce3e594b-cfb4-0300-e054-002128a47908 English nonGeographicDataset non geographic dataset British Geological Survey +44 131 667 1000 The Lyell Centre, Research Avenue South EDINBURGH LOTHIAN EH14 4AP United Kingdom enquiries@bgs.ac.uk pointOfContact 2026-04-14 UK GEMINI 2.3 http://data.bgs.ac.uk/id/dataHolding/13607824 Geomechanical properties of the Carboniferous Middle Coal Measures (Boreholes GGC01 and GGA08) 2021-10-08 creation http://data.bgs.ac.uk/id/dataHolding/13607824 A brief description of ten core plug samples collected from borehole GGC01 (Glasgow, United Kingdom) is provided, as well as for twelve 15-50 g cuttings samples from 1m intervals within borehole GGA08. Samples were also collected from borehole GGA02 but not used for further analyses. Data comprise results from geomechanical tests, permeability and porosity measurements, and X-Ray Diffraction analyses performed on drillcore samples of sandstones, siltstones, mudstones and coals from eleven depth intervals within the GGC01 borehole. Geomechanical data include triaxial compressional strength, tensile strength, and frictional strength. Frictional strength data was also collected for cuttings samples of sandstones, siltstones, mudstones and coals from the GGA08 borehole. In total twenty-three tensile strength tests were performed on ten sampled intervals, and seven porosity measurements pre-and post-failure were taken. Nine triaxial compressive strength tests and twenty-one frictional strength tests were performed, with permeability measured both before and after failure or shear respectively. From compressive strength tests we also determined the Young’s modulus and Poisson’s ratio. Samples and data are derived from the UK Geoenergy Observatories Programme funded by the UKRI Natural Environment Research Council and delivered by the British Geological Survey. Steven Beynon University of Liverpool Department of Environmental Sciences Jane Herdman Building, 4 Brownlow Street Liverpool L69 3GP 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/ce3e594b-cfb4-0300-e054-002128a47908.png Geology GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Compression tests Sandstone Mudstone Rock deformation Tensile strength Permeability Porosity Clays Geomechanics Siltstone BGS Thesaurus of Geosciences 2022 revision UKGEOS 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 2019-10-03 2020-03-31 Microsoft Excel witheld PDF witheld Enquiries British Geological Survey United Kingdom not available distributor https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item168850 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 Core plugs, 19.75mm in diameter, were cut to lengths appropriate for rock deformation laboratory tests (Paterson & Wong, 2005; ASTM D7012-14, 2014; ASTM D3967-16, 2016). Specimens were dried at ~30 °C for >24 hours prior to any testing. Samples were axially compressed in a triaxial deformation apparatus at the University of Liverpool (Faulkner & Armitage, 2013). Tensile strength experiments were conducted using a uniaxial press and a Brazilian test jig. X-Ray Diffraction (XRD) Analyses were performed on eleven samples of crushed core material from the GGC01 borehole. Sample material was prepared using a mill crusher and agate ball crusher so that a size fraction of <125 µm was obtained for each test sample. Porosity of each GGC01 core plug sample was measured using a Quantochrome Multipycnometer, and permeability (k) was determined using the pulse-transient method (Brace et al., 1968).