Experimental direct shear friction dataset for synthetic clay gouges (NERC grant NE/L002469/1)

Friction coefficient and frictional stability (rate & state parameter) data for triaxially compressed direct shear experiments on kaolinite-rich china clay and Mg-montmorillonite fault gouges (<2micron grain size). A total of 19 raw experimental datasets are presented as detailed in the index files: 13 on kaolinite-rich china clay, and 6 on cation-exchanged Mg-Montmorillonite. The raw data files, logged at either 1 or 2Hz, comprise confining pressures, upstream and downstream fluid pressures, force experienced by the direct shear assembly during triaxial compression, and absolute volumes of the confining pressure and fluid pressure reservoirs. Data is provided as measured by gauges in the pressure vessel in Volts, and also as calculated in MPa, kN and mm3. Also presented are the outputs of MATLAB models run to simulate the rate and state parameters k, a, b, dc and f0 for each experiment, with error data presented as 2sigma and standard error values. Parameters were determined using a non-linear least-squares fitting routine with the machine stiffness treated as a fitting parameter (c.f. Noda and Shimamoto, 2009). Data were fit by a single set of state variables (a, b, dc) with a linear detrend. Also presented are the outputs of Specific Thermogravimetric Analyses on kaolinite-rich china clay and Mg-montmorillonite.
 
Citation proposal
. Experimental direct shear friction dataset for synthetic clay gouges (NERC grant NE/L002469/1). https://metadata.bgs.ac.uk/geonetwork/srv/api/records/9cb7598b-b3c1-06fe-e054-002128a47908

Simple

Date ( Creation )
2020
Identifier
http://data.bgs.ac.uk/id/dataHolding/13607574

  Principal investigator

  Point of contact

Maintenance and update frequency
notApplicable notApplicable
GEMET - INSPIRE themes
  • Geology
BGS Thesaurus of Geosciences
  • Saturation , Rock deformation , Friction (geomechanics) , Shear properties , Montmorillonite , Compression tests , Kaolinite , Clays
Keywords
  • NERC_DDC
Access constraints
otherRestrictions Other restrictions
Use constraints
otherRestrictions 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]"
Metadata language
English English
Topic category
  • Geoscientific information

Reference System Information

No information provided.
Distribution format
  • MS Excel ()

OnLine resource
https://www.bgs.ac.uk/services/ngdc/accessions/index.html#item132045  
Hierarchy level
nonGeographicDataset Non geographic dataset
Other
non geographic dataset

Conformance result

Date ( Publication )
2011
Explanation
See the referenced specification
Pass
false

Conformance result

Date ( Publication )
2010-12-08
Explanation
See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF
Pass
false
Statement
Direct shear experiments were performed on 2 clay gouges (<2microns grain size) in a triaxial pressure vessel. Samples were sheared between two stainless steel sliders, with fluid/vacuum controlled via porous sintered discs. Tests were run under the following experimental conditions for each sample, at a confining pressure (Pc) of 60 MPa unless otherwise indicated: 1. Saturated with deionised water (80 MPa Pc, 20 MPa fluid pressure (Pf)); 2. At room humidity; 3. At room humidity with a vacuum applied to the sample assembly; 4. Vacuum oven dry (to 130 &#730;C for 20 hours, then cooled to room temperature under vacuum); 5. Vacuum oven dry (to 130 &#730;C for 20 hours, then cooled to room temperature under vacuum) with a vacuum applied to the sample assembly; 6. At room humidity, taken to 130 &#730;C in the sample assembly under vacuum for ~20 hours and allowed to cool, and then run under vacuum.

gmd:MD_Metadata

File identifier
9cb7598b-b3c1-06fe-e054-002128a47908   XML
Metadata language
English English
Hierarchy level
nonGeographicDataset Non geographic dataset
Hierarchy level name
non geographic dataset
Date stamp
2020-02-13
Metadata standard name
UK GEMINI
Metadata standard version
2.3

  Point of contact

Dataset URI
http://data.bgs.ac.uk/id/dataHolding/13607574
 
 

  Overviews


Provided by

Access to the portal

Associated resources

Not available