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.
nonGeographicDataset
https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item163985
name: Data
function: download
http://data.bgs.ac.uk/id/dataHolding/13607728
eng
geoscientificInformation
publication
2008-06-01
Fault gouge
Normal stress
Subduction zones
NGDC Deposited Data
Pore pressure
revision
2022
NERC_DDC
2020-01-01
2020-10-30
creation
2021-03-30
notApplicable
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.
publication
2011
false
See the referenced specification
publication
2010-12-08
false
See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF
csv
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Post-doctoral Research Associate
University of Liverpool
School of Environmental Sciences, 4 Brownlow Street
Liverpool
L69 3GP
originator
Professor in Geology and Geophysics
University of Liverpool
School of Environmental Sciences, 4 Brownlow Street
Liverpool
L69 3GP
principalInvestigator
British Geological Survey
distributor
British Geological Survey
pointOfContact
British Geological Survey
Environmental Science Centre,Keyworth
NOTTINGHAM
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United Kingdom
+44 115 936 3100
pointOfContact
2025-03-26