Experimental friction data for simulated Nankai Trough gouges sheared under a range of effective normal stress and pore-fluid pressure conditions (NERC Grant NE/S015531/1)

The data are from a suite of friction experiments performed on simulated gouges from the Nankai Trough (Japan). The simulated gouges were prepared by crushing cuttings of Nankai accretionary sediments collected during Integrated Ocean Drilling Program (IODP) Expedition 358. The cuttings were crushed to produce a powder (i.e. simulated gouge) with a grain size of >125 microns. These simulated gouges were sheared under a range of effective normal stress (10-75 Mpa) and pore-fluid pressure (5-75 Mpa) conditions while the sliding velocity was stepped between 0.3 and 3 microns/s to calculated the rate-and-state friction parameter (a-b). The Nankai gouge are strongly rate-strengthening and become more rate-strengthening (i.e. more frictionally stable) at elevated pore-fluid pressure. In contrast, varying the effective normal stress has minimal effect on the frictional stability of the gouges.

Date (Creation): 2021-03-30

Identifier: http://data.bgs.ac.uk/id/dataHolding/13607728

Originator

University of Liverpool - John Bedford ( Post-doctoral Research Associate )

School of Environmental Sciences, 4 Brownlow Street , Liverpool , L69 3GP ,

Principal investigator

University of Liverpool - Professor Daniel Faulkner ( Professor in Geology and Geophysics )

School of Environmental Sciences, 4 Brownlow Street , Liverpool , L69 3GP ,

Distributor

British Geological Survey - Enquiries

Point of contact

British Geological Survey - Enquiries

Maintenance and update frequency: notApplicable notApplicable

GEMET - INSPIRE themes, version 1.0

Geology

BGS Thesaurus of Geosciences

Fault gouge
Normal stress
Subduction zones
NGDC Deposited Data
Pore pressure

dataCentre

NGDC Deposited Data

Keywords

NERC_DDC

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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]"

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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: EnglishEnglish

Topic category

Geoscientific information

Begin date: 2020-01-01

End date: 2020-10-30

Reference System Information

No information provided.

Distribution format

csv ()

Distributor

British Geological Survey - Enquiries

OnLine resource: Data

Hierarchy level: nonGeographicDataset Non geographic dataset

Other: non geographic dataset

Conformance result

Date (Publication): 2011

Explanation: See the referenced specification

Pass: No

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: No

Statement: Data were collected using a direct shear setup, where layers of Nankai gouge were sheared in a triaxial deformation apparatus. In the direct shear geometry the normal stress is applied by the confining pressure (Pc), and pore fluid pressure (Pf) is introduced to the sample through the three porous disks on each of the direct shear forcing blocks. A total of 20 different experiments were performed, at four different effective normal stresses (10, 25, 50 and 75 MPa) and five different pore-fluid pressures (5, 10, 25, 50 and 75 MPa). In each experiment the gouge layers were sheared for an initial 1.5 mm displacement at 0.3 microns/s, before velocity steps of 0.3 to 3 microns/s and back were applied every subsequent 1 mm of displacement to determine the rate-dependence of slip, (a-b). The total displacement in each experiment is 8.5 mm.