Date (Creation)

2025-07-11

Citation identifier

http://data.bgs.ac.uk/id/dataHolding/13608437

Point of contact

Organisation name	Individual name	Electronic mail address	Role
British Geological Survey	Enquiries	enquiries@bgs.ac.uk	Distributor
British Geological Survey	Enquiries	enquiries@bgs.ac.uk	Point of contact

Maintenance and update frequency

Unknown

GEMET - INSPIRE themes, version 1.0

• Geology

BGS Thesaurus of Geosciences

• Mudstone

• UK Location (INSPIRE)

• Abrasion

• Porosity

• Sandstone

• Permeability

• NGDC Deposited Data

• Citable Data

• Density

• Thermal conductivity

dataCentre

• UK Location (INSPIRE)
• NGDC Deposited Data
• UKGEOS
• Citable Data

Keywords

• NERC_DDC

Access constraints

Other restrictions

Other constraints

licenceOGL

Other constraints

Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]"

Use constraints

Other restrictions

Other constraints

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.

Other constraints

Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]"

Spatial representation type

Vector

Language

English

Topic category

• Geoscientific information

Geographic identifier

GB

ISO 3166_1 alpha-3 2009 revision

Geographic identifier

UK [id=139300]

British Geological Survey Gazetteer: Geographical hierarchy from Geosaurus 1979 creation

Geographic identifier

UKM

ISO 3166_2 2009 revision

Begin date

2020-01-01

End date

2025-05-31

Unique resource identifier

OSGB 1936 / British National Grid (EPSG::27700)

Distribution format

Name	Version
MS Excel

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
British Geological Survey	Enquiries	enquiries@bgs.ac.uk	Distributor

OnLine resource

Protocol	Linkage	Name
	https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item188981	Data

OnLine resource

Protocol	Linkage	Name
	https://doi.org/10.5285/06f90e3b-4587-4bd2-bf6f-86c44f664846	Digital Object Identifier (DOI)

Hierarchy level

Dataset

Other

dataset

Statement

The samples, predominantly plugs or wedges taken from borehole core, were tested in the following conditions; Air dry – the samples were left to dry naturally at room temperature. Fully vacuum resaturated - the samples were prepared by saturation with deaired deionised water using a vacuum chamber. The saturated samples remained under vacuum overnight as a minimum and then remained in deaired deionised water until tested. Oven dry – the samples were dried in an oven at 105°C for a minimum of 24 hours. Fresh, natural moisture content – the samples were removed soon after the core was extracted from the ground and were wrapped to ensure they retained natural moisture content until they were tested. 1. Thermal conductivity - the samples were tested using the following techniques; Modified Transient Plane Source (MTPS) – this is a sensor used with the C-therm Trident Conductivity Analyzer. The sample is placed on top of the sensor and a weight is placed on top to ensure good contact. The sensor contains a coil through which it induces a current and uses the change in voltage as a proxy for movement of heat through the sample (see Trident Thermal Conductivity Instrument – C-Therm Technologies Ltd. for more detail). The sensor requires a contact agent to sit between the sample and the sensor, for fully saturated and fresh samples this is water, for dry samples this is thermal grease as noted in the dataset. High resolution optical scanning High-precision non-contact measurement that optically scans the sample’s surface with a focused, mobile and continuously operated heat source in combination with two infrared temperature sensors. After warming up the instrument, the sensors were calibrated with a reference sample. The measurements were made on a 2 cm wide black mark made on the plane surface of each sample. All the measurements were repeated three times from which mean values were calculated.” 2. Porosity and permeability Porosity and permeability values were obtained for some samples. A standard liquid resaturation method was used to determine effective porosity, bulk density and grain density (Bloomfield et al. 1995). Gas permeability was determined using nitrogen under steady state conditions and an equivalent liquid permeability calculated on the basis of a previous empirical correlation (Bloomfield and Williams 1995). Probe permeametry was performed using nitrogen as the permeant under steady state flow conditions and assuming radial flow geometry. Details of each of the methods are given in the methodology document Wallingford Poroperm methodology Peter Williams Where grain size is referred to in the data, this is based on the BGS RCS modified Wentworth scheme, see https://webapps.bgs.ac.uk/data/vocabularies/dictionary.cfm?name=DIC_GRAIN_SIZE_BGS

Metadata

File identifier

39f350ce-7ef2-d48b-e063-3050940a3955 XML

Metadata language

English

Hierarchy level

Dataset

Date stamp

2025-07-23

Metadata standard name

UK GEMINI

Metadata standard version

2.3

Metadata author

Organisation name	Individual name	Electronic mail address	Role
British Geological Survey		enquiries@bgs.ac.uk	Point of contact

Dataset URI

http://data.bgs.ac.uk/id/dataHolding/13608437