Articles | Volume 12, issue 1
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Effect of normal stress on the frictional behavior of brucite: application to slow earthquakes at the subduction plate interface in the mantle wedge
Department of Earth and Planetary Science, School of Science, University of Tokyo, Bunkyo, 113-0033 Tokyo, Japan
Department of Ocean Floor Geoscience, Atmosphere and Ocean Research Institute, University of Tokyo, Kashiwa, 277-8564 Chiba, Japan
Department of Earth and Planetary Systems Science, Hiroshima University, Higashi–Hiroshima, 739-8526 Hiroshima, Japan
Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, 305-0044 Ibaraki, Japan
Department of Earth and Planetary Science, School of Science, University of Tokyo, Bunkyo, 113-0033 Tokyo, Japan
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Susumu Umino, Gregory F. Moore, Brian Boston, Rosalind Coggon, Laura Crispini, Steven D'Hondt, Michael O. Garcia, Takeshi Hanyu, Frieder Klein, Nobukazu Seama, Damon A. H. Teagle, Masako Tominaga, Mikiya Yamashita, Michelle Harris, Benoit Ildefonse, Ikuo Katayama, Yuki Kusano, Yohey Suzuki, Elizabeth Trembath-Reichert, Yasuhiro Yamada, Natsue Abe, Nan Xiao, and Fumio Inagaki
Sci. Dril., 29, 69–82,
Related subject area
Subject area: Tectonic plate interactions, magma genesis, and lithosphere deformation at all scales | Editorial team: Structural geology and tectonics, paleoseismology, rock physics, experimental deformation | Discipline: Mineral and rock physicsDevelopment of multi field rock resistivity test system for THMCRaman spectroscopy in thrust-stacked carbonates: an investigation of spectral parameters with implications for temperature calculations in strained samplesFailure mode transition in Opalinus Clay: a hydro-mechanical and microstructural perspectiveThermal equation of state of the main minerals of eclogite: Constraining the density evolution of eclogite during the delamination process in TibetCreep of CarbFix basalt: influence of rock–fluid interactionMicromechanisms leading to shear failure of Opalinus Clay in a triaxial test: a high-resolution BIB–SEM studyElastic anisotropies of rocks in a subduction and exhumation settingMechanical and hydraulic properties of the excavation damaged zone (EDZ) in the Opalinus Clay of the Mont Terri rock laboratory, SwitzerlandThe competition between fracture nucleation, propagation, and coalescence in dry and water-saturated crystalline rockMeasuring hydraulic fracture apertures: a comparison of methodsExtracting microphysical fault friction parameters from laboratory and field injection experimentsThe physics of fault friction: insights from experiments on simulated gouges at low shearing velocitiesFrictional slip weakening and shear-enhanced crystallinity in simulated coal fault gouges at slow slip ratesThe hydraulic efficiency of single fractures: correcting the cubic law parameterization for self-affine surface roughness and fracture closureMagnetic properties of pseudotachylytes from western Jämtland, central Swedish CaledonidesThe variation and visualisation of elastic anisotropy in rock-forming mineralsDeformation mechanisms in mafic amphibolites and granulites: record from the Semail metamorphic sole during subduction infancyUniaxial compression of calcite single crystals at room temperature: insights into twinning activation and development
Jianwei Ren, Lei Song, Qirui Wang, Haipeng Li, Junqi Fan, Jianhua Yue, and Honglei Shen
A THMC multi field rock resistivity test system is developed, which has the functions of rock triaxial test and resistivity test under the condition of high and low temperature, high pressure and high salinity water seepage. A sealing method to prevent the formation of a water film on the side of the specimen is proposed based on the characteristics of the device. The device is suitable for studying the relationship between rock mechanical properties and resistivity in complex environments.
Lauren Kedar, Clare E. Bond, and David K. Muirhead
Solid Earth, 13, 1495–1511,Short summary
Raman spectroscopy of carbon-bearing rocks is often used to calculate peak temperatures and therefore burial history. However, strain is known to affect Raman spectral parameters. We investigate a series of deformed rocks that have been subjected to varying degrees of strain and find that there is a consistent change in some parameters in the most strained rocks, while other parameters are not affected by strain. We apply temperature calculations and find that strain affects them differently.
Lisa Winhausen, Kavan Khaledi, Mohammadreza Jalali, Janos L. Urai, and Florian Amann
Solid Earth, 13, 901–915,Short summary
Triaxial compression tests at different effective stresses allow for analysing the deformation behaviour of Opalinus Clay, the potential host rock for nuclear waste in Switzerland. We conducted microstructural investigations of the deformed samples to relate the bulk hydro-mechanical behaviour to the processes on the microscale. Results show a transition from brittle- to more ductile-dominated deformation. We propose a non-linear failure envelop associated with the failure mode transition.
Zhilin Ye, Dawei Fan, Bo Li, Qizhe Tang, Jingui Xu, Dongzhou Zhang, and Wenge Zhou
Solid Earth, 13, 745–759,Short summary
Eclogite is a major factor in the initiation of delamination during orogenic collision. According to the equations of state of main minerals of eclogite under high temperature and high pressure, the densities of eclogite along two types of delamination in Tibet are provided. The effects of eclogite on the delamination process are discussed in detail. A high abundance of garnet, a high Fe content, and a high degree of eclogitization are more conducive to instigating the delamination.
Tiange Xing, Hamed O. Ghaffari, Ulrich Mok, and Matej Pec
Solid Earth, 13, 137–160,Short summary
Geological carbon sequestration using basalts provides a solution to mitigate the high CO2 concentration in the atmosphere. Due to the long timespan of the GCS, it is important to understand the long-term deformation of the reservoir rock. Here, we studied the creep of basalt with fluid presence. Our results show presence of fluid weakens the rock and promotes creep, while the composition only has a secondary effect and demonstrate that the governing creep mechanism is subcritical microcracking.
Lisa Winhausen, Jop Klaver, Joyce Schmatz, Guillaume Desbois, Janos L. Urai, Florian Amann, and Christophe Nussbaum
Solid Earth, 12, 2109–2126,Short summary
An experimentally deformed sample of Opalinus Clay (OPA), which is being considered as host rock for nuclear waste in Switzerland, was studied by electron microscopy to image deformation microstructures. Deformation localised by forming micrometre-thick fractures. Deformation zones show dilatant micro-cracking, granular flow and bending grains, and pore collapse. Our model, with three different stages of damage accumulation, illustrates microstructural deformation in a compressed OPA sample.
Michael J. Schmidtke, Ruth Keppler, Jacek Kossak-Glowczewski, Nikolaus Froitzheim, and Michael Stipp
Solid Earth, 12, 1801–1828,Short summary
Properties of deformed rocks are frequently anisotropic. One of these properties is the travel time of a seismic wave. In this study we measured the seismic anisotropy of different rocks, collected in the Alps. Our results show distinct differences between rocks of oceanic origin and those of continental origin.
Sina Hale, Xavier Ries, David Jaeggi, and Philipp Blum
Solid Earth, 12, 1581–1600,Short summary
The construction of tunnels leads to substantial alterations of the surrounding rock, which can be critical concerning safety aspects. We use different mobile methods to assess the hydromechanical properties of an excavation damaged zone (EDZ) in a claystone. We show that long-term exposure and dehydration preserve a notable fracture permeability and significantly increase strength and stiffness. The methods are suitable for on-site monitoring without any further disturbance of the rock.
Jessica A. McBeck, Wenlu Zhu, and François Renard
Solid Earth, 12, 375–387,Short summary
The competing modes of fault network development, including nucleation, propagation, and coalescence, influence the localization and connectivity of fracture networks and are thus critical influences on permeability. We distinguish between these modes of fracture development using in situ X-ray tomography triaxial compression experiments on crystalline rocks. The results underscore the importance of confining stress (burial depth) and fluids on fault network development.
Chaojie Cheng, Sina Hale, Harald Milsch, and Philipp Blum
Solid Earth, 11, 2411–2423,Short summary
Fluids (like water or gases) within the Earth's crust often flow and interact with rock through fractures. The efficiency with which these fluids may flow through this void space is controlled by the width of the fracture(s). In this study, three different physical methods to measure fracture width were applied and compared and their predictive accuracy was evaluated. As a result, the mobile methods tested may well be applied in the field if a number of limitations and requirements are observed.
Martijn P. A. van den Ende, Marco M. Scuderi, Frédéric Cappa, and Jean-Paul Ampuero
Solid Earth, 11, 2245–2256,Short summary
The injection of fluids (like wastewater or CO2) into the subsurface could cause earthquakes when existing geological faults inside the reservoir are (re-)activated. To assess the hazard associated with this, previous studies have conducted experiments in which fluids have been injected into centimetre- and decimetre-scale faults. In this work, we analyse and model these experiments. To this end, we propose a new approach through which we extract the model parameters that govern slip on faults.
Berend A. Verberne, Martijn P. A. van den Ende, Jianye Chen, André R. Niemeijer, and Christopher J. Spiers
Solid Earth, 11, 2075–2095,Short summary
The strength of fault rock plays a central role in determining the distribution of crustal seismicity. We review laboratory work on the physics of fault friction at low shearing velocities carried out at Utrecht University in the past 2 decades. Key mechanical data and post-mortem microstructures can be explained using a generalized, physically based model for the shear of gouge-filled faults. When implemented into numerical fault-slip codes, this offers new ways to simulate the seismic cycle.
Caiyuan Fan, Jinfeng Liu, Luuk B. Hunfeld, and Christopher J. Spiers
Solid Earth, 11, 1399–1422,Short summary
Coal is an important source rock for natural gas recovery, and its frictional properties play a role in induced seismicity. We performed experiments to investigate the frictional properties of bituminous coal, and our results show that the frictional strength of coal became significantly weakened with slip displacement, from a peak value of 0.5 to a steady-state value of 0.3. This may be caused by the development of shear bands with internal shear-enhanced molecular structure.
Maximilian O. Kottwitz, Anton A. Popov, Tobias S. Baumann, and Boris J. P. Kaus
Solid Earth, 11, 947–957,Short summary
In this study, we conducted 3-D numerical simulations of fluid flow in synthetically generated fractures that statistically reflect geometries of naturally occurring fractures. We introduced a non-dimensional characterization scheme to relate fracture permeabilities estimated from the numerical simulations to their geometries in a unique manner. By that, we refined the scaling law for fracture permeability, which can be easily integrated into discrete-fracture-network (DFN) modeling approaches.
Bjarne S. G. Almqvist, Hagen Bender, Amanda Bergman, and Uwe Ring
Solid Earth, 11, 807–828,Short summary
Rocks in fault zones can melt during earthquakes. The geometry and magnetic properties of such earthquake-melted rocks from Jämtland, central Sweden, show that they formed during Caledonian mountain building in the Palaeozoic. The small sample size (~0.2 cm3) used in this study is unconventional in studies of magnetic anisotropy and introduces challenges for interpretations. Nevertheless, the magnetic properties help shed light on the earthquake event and subsequent alteration of the rock.
David Healy, Nicholas Erik Timms, and Mark Alan Pearce
Solid Earth, 11, 259–286,Short summary
Rock-forming minerals behave elastically, a property that controls their ability to support stress and strain, controls the transmission of seismic waves, and influences subsequent permanent deformation. Minerals are intrinsically anisotropic in their elastic properties; that is, they have directional variations that are related to the crystal lattice. We explore this directionality and present new ways of visualising it. We hope this will enable further advances in understanding deformation.
Mathieu Soret, Philippe Agard, Benoît Ildefonse, Benoît Dubacq, Cécile Prigent, and Claudio Rosenberg
Solid Earth, 10, 1733–1755,Short summary
This study sheds light on the mineral-scale mechanisms controlling the progressive deformation of sheared amphibolites from the Oman metamorphic sole during subduction initiation and unravels how strain is localized and accommodated in hydrated mafic rocks at high temperature conditions. Our results indicate how metamorphic reactions and pore-fluid pressures driven by changes in pressure–temperature conditions and/or water activity control the rheology of mafic rocks.
Camille Parlangeau, Alexandre Dimanov, Olivier Lacombe, Simon Hallais, and Jean-Marc Daniel
Solid Earth, 10, 307–316,Short summary
Calcite twinning is a common deformation mechanism that mainly occurs at low temperatures. Twinning activation appears at a critical strength value, which is poorly documented and still debated. Temperature is known to influence twin thickness and shape; however, few studies have been conducted on calcite deformation at low temperatures. The goal of this work is to determine if thickness is mainly due to high temperatures and to establish the validity of a threshold twinning activation value.
Angiboust, S. and Agard, P.: Initial water budget: The key to detaching large volumes of eclogitized oceanic crust along the subduction channel?, Lithos, 120, 453–474, https://doi.org/10.1016/j.lithos.2010.09.007, 2010.
Anthony, J. L. and Marone, C.: Influence of particle characteristics on granular friction, J. Geophys. Res., 110, B08409, https://doi.org/10.1029/2004JB003399, 2005.
Audet, P. and Kim, Y.: Teleseismic constraints on the geological environment of deep episodic slow earthquakes in subduction zone forearcs: A review, Tectonophysics, 670, 1–15, https://doi.org/10.1016/j.tecto.2016.01.005, 2016.
Audet, P., Bostock, M. G., Christensen, N. I., and Peacock, S. M.: Seismic evidence for overpressured subducted oceanic crust and megathrust fault sealing, Nature, 457, 76–78, https://doi.org/10.1038/nature07650, 2009.
Berman, H.: Fibrous Brucite from Quebec, Am. Mineral., 17, 313–316, 1932.
Bhattacharya, P., Rubin, A. M., Bayart, E., Savage, H. M., and Marone, C.: Critical evaluation of state evolution laws in rate and state friction: Fitting large velocity steps in simulated fault gouge with time-, slip-, and stress-dependent constitutive laws, J. Geophys. Res.-Sol. Ea., 120, 6365–6385, https://doi.org/10.1002/2015JB012437, 2015.
Bhattacharya, P., Rubin, A. M., and Beeler, N. M.: Does fault strengthening in laboratory rock friction experiments really depend primarily upon time and not slip?, J. Geophys. Res.-Sol. Ea., 122, 6389–6430, https://doi.org/10.1002/2017JB013936, 2017.
Blanpied, M. L., Marone, C. J., Lockner, D. A., Byerlee, J. D., and King, D. P.: Quantitative measure of the variation in fault rheology due to fluid-rock interactions, J. Geophys. Res.-Sol. Ea., 103, 9691–9712, https://doi.org/10.1029/98JB00162, 1998.
Bostock, M. G., Hyndman, R. D., Rondenay, S., and Peacock, S. M.: An inverted continental Moho and serpentinization of the forearc mantle, Nature, 417, 536–538, https://doi.org/10.1038/417536a, 2002.
Calvert, A. J., Bostock, M. G., Savard, G., and Unsworth, M. J.: Cascadia low frequency earthquakes at the base of an overpressured subduction shear zone, Nat. Commun., 11, 3874, https://doi.org/10.1038/s41467-020-17609-3, 2020.
Christensen, N. I.: Serpentinites, Peridotites, and Seismology, Int. Geol. Rev., 46, 795–816, https://doi.org/10.2747/0020-68184.108.40.2065, 2004.
Collettini, C., Viti, C., Smith, S. A. F., and Holdsworth, R. E.: Development of interconnected talc networks and weakening of continental low-angle normal faults, Geology, 37, 567–570, https://doi.org/10.1130/G25645A.1, 2009.
D'Antonio, M. and Kristensen, M. B.: Serpentine and brucite of ultramafic clasts from the South Chamorro Seamount (Ocean Drilling Program Leg 195, Site 1200): inferences for the serpentinization of the Mariana forearc mantle, Mineral. Mag., 68, 887–904, https://doi.org/10.1180/0026461046860229, 2004.
Deer, W. A., Howie, R. A., and Zussman, J.: An Introduction to the Rock-Forming Minerals, 3rd edn., The Mineralogical Society, London, UK, 2013.
den Hartog, S. A. M. and Spiers, C. J.: A microphysical model for fault gouge friction applied to subduction megathrusts, J. Geophys. Res.-Sol. Ea., 119, 1510–1529, https://doi.org/10.1002/2013JB010580, 2014.
den Hartog, S. A. M., Peach, C. J., de Winter, D. A. M., Spiers, C. J., and Shimamoto, T.: Frictional properties of megathrust fault gouges at low sliding velocities: New data on effects of normal stress and temperature, J. Struct. Geol., 38, 156–171, https://doi.org/10.1016/j.jsg.2011.12.001, 2012.
DeShon, H. R. and Schwartz, S. Y.: Evidence for serpentinization of the forearc mantle wedge along the Nicoya Peninsula, Costa Rica, Geophys. Res. Lett., 31, L21611, https://doi.org/10.1029/2004GL021179, 2004.
Dieterich, J. H.: Modeling of rock friction: 1. Experimental results and constitutive equations, J. Geophys. Res., 84, 2161, https://doi.org/10.1029/JB084iB05p02161, 1979.
Dorbath, C., Gerbault, M., Carlier, G., and Guiraud, M.: Double seismic zone of the Nazca plate in northern Chile: High-resolution velocity structure, petrological implications, and thermomechanical modeling, Geochem. Geophy. Geosy., 9, Q07006, https://doi.org/10.1029/2008GC002020, 2008.
Eberhart-Phillips, D. and Reyners, M.: Imaging the Hikurangi Plate interface region, with improved local-earthquake tomography, Geophys. J. Int., 190, 1221–1242, https://doi.org/10.1111/j.1365-246X.2012.05553.x, 2012.
Evans, B. W., Hattori, K., and Baronnet, A.: Serpentinite: What, Why, Where?, Elements, 9, 99–106, https://doi.org/10.2113/gselements.9.2.99, 2013.
Fagereng, Å. and den Hartog, S. A. M.: Subduction megathrust creep governed by pressure solution and frictional–viscous flow, Nat. Geosci., 10, 51–57, https://doi.org/10.1038/ngeo2857, 2017.
French, M. E. and Condit, C. B.: Slip partitioning along an idealized subduction plate boundary at deep slow slip conditions, Earth Planet. Sc. Lett., 528, 115828, https://doi.org/10.1016/j.epsl.2019.115828, 2019.
Gao, X. and Wang, K.: Rheological separation of the megathrust seismogenic zone and episodic tremor and slip, Nature, 543, 416–419, https://doi.org/10.1038/nature21389, 2017.
Giorgetti, C., Carpenter, B. M., and Collettini, C.: Frictional behavior of talc-calcite mixtures, J. Geophys. Res.-Sol. Ea., 120, 6614–6633, https://doi.org/10.1002/2015JB011970, 2015.
Guillot, S. and Hattori, K.: Serpentinites: Essential roles in geodynamics, arc volcanism, sustainabled, and the origin of life, Elements, 9, 95–98, https://doi.org/10.2113/gselements.9.2.95, 2013.
Guillot, S., Hattori, K., Agard, P., Schwartz, S., and Vidal, O.: Exhumation processes in oceanic and continental subduction conetxts: a review, in: Subduction zone geodynamics, edited by: Lallemand, S. and Funiciello, F., Springer, Berlin, Heidelberg, Germany, 175–205, 2009.
Guillot, S., Schwartz, S., Reynard, B., Agard, P., and Prigent, C.: Tectonic significance of serpentinites, Tectonophysics, 646, 1–19, https://doi.org/10.1016/j.tecto.2015.01.020, 2015.
Haines, S. H., Kaproth, B., Marone, C., Saffer, D. M., and van der Pluijm, B. A.: Shear zones in clay-rich fault gouge: A laboratory study of fabric development and evolution, J. Struct. Geol., 51, 206–225, https://doi.org/10.1016/j.jsg.2013.01.002, 2013.
Hirauchi, K., den Hartog, S. A. M., and Spiers, C. J.: Weakening of the slab–mantle wedge interface induced by metasomatic growth of talc, Geology, 41, 75–78, https://doi.org/10.1130/G33552.1, 2013.
Hirth, G. and Beeler, N. M.: The role of fluid pressure on frictional behavior at the base of the seismogenic zone, Geology, 43, 223–226, https://doi.org/10.1130/G36361.1, 2015.
Hirth, G. and Guillot, S.: Rheology and tectonic significance of serpentinite, Elements, 9, 107–113, https://doi.org/10.2113/gselements.9.2.107, 2013.
Horn, H. M. and Deere, D. U.: Frictional characteristics of minerals, Géotechnique, 12, 319–335, https://doi.org/10.1680/geot.19220.127.116.119, 1962.
Hostetler, P. B., Coleman, R. G., Mumpton, F. A., and Evans, B. W.: Brucite in Alpine Serpentinites, Am. Mineral., 51, 75–98, 1966.
Hyndman, R. D. and Peacock, S. M.: Serpentinization of the forearc mantle, Earth Planet. Sc. Lett., 212, 417–432, https://doi.org/10.1016/S0012-821X(03)00263-2, 2003.
Ide, S., Beroza, G. C., Shelly, D. R., and Uchide, T.: A scaling law for slow earthquakes, Nature, 447, 76–79, https://doi.org/10.1038/nature05780, 2007.
Ikari, M. J., Marone, C., Saffer, D. M., and Kopf, A. J.: Slip weakening as a mechanism for slow earthquakes, Nat. Geosci., 6, 468–472, https://doi.org/10.1038/ngeo1818, 2013.
Ikari, M. J., Carpenter, B. M., and Marone, C.: A microphysical interpretation of rate- and state-dependent friction for fault gouge, Geochem. Geophy. Geosy., 17, 1660–1677, https://doi.org/10.1002/2016GC006286, 2016.
Kawahara, H., Endo, S., Wallis, S. R., Nagaya, T., Mori, H., and Asahara, Y.: Brucite as an important phase of the shallow mantle wedge: Evidence from the Shiraga unit of the Sanbagawa subduction zone, SW Japan, Lithos, 254–255, 53–66, https://doi.org/10.1016/j.lithos.2016.02.022, 2016.
Kawai, K., Sakuma, H., Katayama, I., and Tamura, K.: Frictional characteristics of single and polycrystalline muscovite and influence of fluid chemistry, J. Geophys. Res.-Sol. Ea., 120, 6209–6218, https://doi.org/10.1002/2015JB012286, 2015.
Kawakatsu, H. and Watada, S.: Seismic evidence for deep-water transportation in the mantle, Science, 316, 1468–1471, https://doi.org/10.1126/science.1140855, 2007.
Kenigsberg, A. R., Rivière, J., Marone, C., and Saffer, D. M.: The effects of shear strain, fabric, and porosity evolution on elastic and mechanical properties of clay-rich fault gouge, J. Geophys. Res.-Sol. Ea., 10968–10982, https://doi.org/10.1029/2019JB017944, 2019.
Kenigsberg, A. R., Rivière, J., Marone, C., and Saffer, D. M.: Evolution of Elastic and Mechanical Properties During Fault Shear: The Roles of Clay Content, Fabric Development, and Porosity, J. Geophys. Res.-Sol. Ea., 125, e2019JB018612, https://doi.org/10.1029/2019JB018612, 2020.
Leeman, J. R., Saffer, D. M., Scuderi, M. M., and Marone, C.: Laboratory observations of slow earthquakes and the spectrum of tectonic fault slip modes, Nat. Commun., 7, 11104, https://doi.org/10.1038/ncomms11104, 2016.
Leeman, J. R., Marone, C., and Saffer, D. M.: Frictional mechanics of slow earthquakes, J. Geophys. Res.-Sol. Ea., 123, 7931–7949, https://doi.org/10.1029/2018JB015768, 2018.
Liu, Y. and Rice, J. R.: Spontaneous and triggered aseismic deformation transients in a subduction fault model, J. Geophys. Res., 112, B09404, https://doi.org/10.1029/2007JB004930, 2007.
Liu, Y. and Rice, J. R.: Slow slip predictions based on granite and gabbro friction data compared to GPS measurements in northern Cascadia, J. Geophys. Res.-Sol. Ea., 114, 1–19, https://doi.org/10.1029/2008JB006142, 2009.
Logan, J. M. and Rauenzahn, K. A.: Frictional dependence of gouge mixtures of quartz and montmorillonite on velocity, composition and fabric, Tectonophysics, 144, 87–108, https://doi.org/10.1016/0040-1951(87)90010-2, 1987.
Logan, J. M., Freidman, M., Higgs, N., Dengo, C., and Shimamoto, T.: Experimental studies of simulated fault gouge and their application to studies of natural fault zones, in: Proc. Conf. VIII – Analysis of Actual Fault Zones in Bedrock, U.S. Geological Survey, 305–343, 1979.
Logan, J. M., Dengo, C. A., Higgs, N. G., and Wang, Z. Z.: Fabrics of experimental fault zones: Their development and eelationship to mechanical behavior, in: Fault Mechanics and Transport Properties of Rocks, edited by: Evans, B, and Wong, T. F., Elsevier, London, 33–67, 1992.
Manning, C. E.: Coupled reaction and flow in subduction zones: Silica metasomatism in the mantle wedge, in: Fluid Flow and Transport in Rocks, edited by Jamtveit, B. and Yardley, B. W. D., Springer, Dordrecht, the Netherlands, 139–148, 1997.
Marone, C.: Laboratory-derived friction laws and their application to seismic faulting, Annu. Rev. Earth Pl. Sc., 26, 643–696, https://doi.org/10.1146/annurev.earth.26.1.643, 1998.
Marone, C. and Kilgore, B. D.: Scaling of the critical slip distance for seismic faulting with shear strain in fault zones, Nature, 362, 618–621, https://doi.org/10.1038/362618a0, 1993.
Matsubara, M., Obara, K., and Kasahara, K.: High-VP/VS zone accompanying non-volcanic tremors and slow-slip events beneath southwestern Japan, Tectonophysics, 472, 6–17, https://doi.org/10.1016/j.tecto.2008.06.013, 2009.
Matsuzawa, T., Hirose, H., Shibazaki, B., and Obara, K.: Modeling short- and long-term slow slip events in the seismic cycles of large subduction earthquakes, J. Geophys. Res., 115, B12301, https://doi.org/10.1029/2010JB007566, 2010.
Mizukami, T., Yokoyama, H., Hiramatsu, Y., Arai, S., Kawahara, H., Nagaya, T., and Wallis, S. R.: Two types of antigorite serpentinite controlling heterogeneous slow-slip behaviours of slab–mantle interface, Earth Planet. Sc. Lett., 401, 148–158, https://doi.org/10.1016/j.epsl.2014.06.009, 2014.
Moore, D. E. and Lockner, D. A.: Crystallographic controls on the frictional behavior of dry and water-saturated sheet structure minerals, J. Geophys. Res., 109, B03401, https://doi.org/10.1029/2003JB002582, 2004.
Moore, D. E. and Lockner, D. A.: Comparative deformation behavior of minerals in serpentinized ultramafic rock: Application to the slab-mantle interface in subduction zones, Int. Geol. Rev., 49, 401–415, https://doi.org/10.2747/0020-6818.104.22.1681, 2007.
Moore, D. E. and Lockner, D. A.: Talc friction in the temperature range 25∘–400 ∘C: Relevance for Fault-Zone Weakening, Tectonophysics, 449, 120–132, https://doi.org/10.1016/j.tecto.2007.11.039, 2008.
Moore, D. E. and Lockner, D. A.: Frictional strengths of talc-serpentine and talc-quartz mixtures, J. Geophys. Res., 116, B01403, https://doi.org/10.1029/2010JB007881, 2011.
Moore, D. E., Lockner, D. A., Ma, S., Summers, R., and Byerlee, J. D.: Strengths of serpentinite gouges at elevated temperatures, J. Geophys. Res.-Sol. Ea., 102, 14787–14801, https://doi.org/10.1029/97JB00995, 1997.
Moore, D. E., Lockner, D. A., Iwata, K., Tanaka, H., and Byerlee, J. D.: How brucite may affect the frictional properties of serpentinite, USGS Open-File Report, U.S. Geological Survey, 1–14, 2001.
Morrow, C. A., Moore, D. E., and Lockner, D. A.: The effect of mineral bond strength and adsorbed water on fault gouge frictional strength, Geophys. Res. Lett., 27, 815–818, https://doi.org/10.1029/1999GL008401, 2000.
Nagaya, T., Okamoto, A., Oyanagi, R., Seto, Y., Miyake, A., Uno, M., Muto, J., and Wallis, S. R.: Crystallographic preferred orientation of talc determined by an improved EBSD procedure for sheet silicates: Implications for anisotropy at the slab–mantle interface due to Si-metasomatism, Am. Mineral., 105, 873–893, https://doi.org/10.2138/am-2020-7006, 2020.
Nakajima, J., Tsuji, Y., Hasegawa, A., Kita, S., Okada, T., and Matsuzawa, T.: Tomographic imaging of hydrated crust and mantle in the subducting Pacific slab beneath Hokkaido, Japan: Evidence for dehydration embrittlement as a cause of intraslab earthquakes, Gondwana Res., 16, 470–481, https://doi.org/10.1016/j.gr.2008.12.010, 2009.
Niemeijer, A. R.: Velocity-dependent slip weakening by the combined operation of pressure solution and foliation development, Sci. Rep.-UK, 8, 4724, https://doi.org/10.1038/s41598-018-22889-3, 2018.
Niemeijer, A. R. and Spiers, C. J.: A microphysical model for strong velocity weakening in phyllosilicate-bearing fault gouges, J. Geophys. Res., 112, B10405, https://doi.org/10.1029/2007JB005008, 2007.
Noda, H. and Shimamoto, T.: Constitutive properties of clayey fault gouge from the Hanaore fault zone, southwest Japan, J. Geophys. Res., 114, B04409, https://doi.org/10.1029/2008JB005683, 2009.
Noda, H. and Takahashi, M.: The effective stress law at a brittle-plastic transition with a halite gouge layer, Geophys. Res. Lett., 43, 1966–1972, https://doi.org/10.1002/2015GL067544, 2016.
Obara, K.: Nonvolcanic Deep Tremor Associated with Subduction in Southwest Japan, Science, 296, 1679–1681, https://doi.org/10.1126/science.1070378, 2002.
Obara, K. and Kato, A.: Connecting slow earthquakes to huge earthquakes, Science, 353, 253–257, https://doi.org/10.1126/science.aaf1512, 2016.
Okamoto, A. S., Verberne, B. A., Niemeijer, A. R., Takahashi, M., Shimizu, I., Ueda, T., and Spiers, C. J.: Frictional properties of simulated chlorite gouge at hydrothermal conditions: Implications for subduction megathrusts, J. Geophys. Res.-Sol. Ea., 124, 4545–4565, https://doi.org/10.1029/2018JB017205, 2019.
Okazaki, K. and Katayama, I.: Slow stick slip of antigorite serpentinite under hydrothermal conditions as a possible mechanism for slow earthquakes, Geophys. Res. Lett., 42, 1099–1104, https://doi.org/10.1002/2014GL062735, 2015.
Okuda, H., Kawai, K., and Sakuma, H.: First-principles investigation of frictional characteristics of brucite: An application to its macroscopic frictional characteristics, J. Geophys. Res.-Sol. Ea., 124, 10423–10443, https://doi.org/10.1029/2019JB017740, 2019.
Oleskevich, D. A., Hyndman, R. D., and Wang, K.: The updip and downdip limits to great subduction earthquakes: Thermal and structural models of Cascadia, south Alaska, SW Japan, and Chile, J. Geophys. Res.-Sol. Ea., 104, 14965–14991, https://doi.org/10.1029/1999JB900060, 1999.
Oyanagi, R., Okamoto, A., Hirano, N., and Tsuchiya, N.: Competitive hydration and dehydration at olivine–quartz boundary revealed by hydrothermal experiments: Implications for silica metasomatism at the crust–mantle boundary, Earth Planet. Sc. Lett., 425, 44–54, https://doi.org/10.1016/j.epsl.2015.05.046, 2015.
Oyanagi, R., Okamoto, A., and Tsuchiya, N.: Silica controls on hydration kinetics during serpentinization of olivine: Insights from hydrothermal experiments and a reactive transport model, Geochim. Cosmochim. Ac., 270, 21–42, https://doi.org/10.1016/j.gca.2019.11.017, 2020.
Peacock, S. M. and Hyndman, R. D.: Hydrous minerals in the mantle wedge and the maximum depth of subduction thrust earthquakes, Geophys. Res. Lett., 26, 2517–2520, https://doi.org/10.1029/1999GL900558, 1999.
Peacock, S. M. and Wang, K.: Seismic consequences of warm versus cool subduction metamorphism: Examples from southwest and northeast Japan, Science, 286, 937–939, https://doi.org/10.1126/science.286.5441.937, 1999.
Ramachandran, K. and Hyndman, R. D.: The fate of fluids released from subducting slab in northern Cascadia, Solid Earth, 3, 121–129, https://doi.org/10.5194/se-3-121-2012, 2012.
Reinen, L. A., Weeks, J. D., and Tullis, T. E.: The frictional behavior of lizardite and antigorite serpentinites: Experiments, constitutive models, and implications for natural faults, Pure Appl. Geophys., 143, 317–358, https://doi.org/10.1007/BF00874334, 1994.
Reynard, B.: Serpentine in active subduction zones, Lithos, 178, 171–185, https://doi.org/10.1016/j.lithos.2012.10.012, 2013.
Rogers, G. and Dragert, H.: Episodic tremor and slip on the Cascadia subduction zone: The chatter of silent slip, Science, 300, 1942–1943, https://doi.org/10.1126/science.1084783, 2003.
Rubin, A. M.: Episodic slow slip events and rate-and-state friction, J. Geophys. Res., 113, B11414, https://doi.org/10.1029/2008JB005642, 2008.
Rubinstein, J. L., Vidale, J. E., Gomberg, J., Bodin, P., Creager, K. C., and Malone, S. D.: Non-volcanic tremor driven by large transient shear stresses, Nature, 448, 579–582, https://doi.org/10.1038/nature06017, 2007.
Rubinstein, J. L., La Rocca, M., Vidale, J. E., Creager, K. C., and Wech, A. G.: Tidal Modulation of Nonvolcanic Tremor, Science, 319, 186–189, https://doi.org/10.1126/science.1150558, 2008.
Ruina, A. L.: Slip instability and state variable friction laws, J. Geophys. Res.-Sol. Ea., 88, 10359–10370, https://doi.org/10.1029/JB088iB12p10359, 1983.
Saffer, D. M. and Marone, C.: Comparison of smectite- and illite-rich gouge frictional properties: application to the updip limit of the seismogenic zone along subduction megathrusts, Earth Planet. Sc. Lett., 215, 219–235, https://doi.org/10.1016/S0012-821X(03)00424-2, 2003.
Sánchez-Roa, C., Faulkner, D. R., Boulton, C., Jimenez-Millan, J., and Nieto, F.: How phyllosilicate mineral structure affects fault strength in Mg-rich fault systems, Geophys. Res. Lett., 44, 5457–5467, https://doi.org/10.1002/2017GL073055, 2017.
Schmidt, D. A., and Gao, H.: Source parameters and time-dependent slip distributions of slow slip events on the Cascadia subduction zone from 1998 to 2008, J. Geophys. Res., 115, B00A18, https://doi.org/10.1029/2008JB006045, 2010.
Segall, P., Rubin, A. M., Bradley, A. M., and Rice, J. R.: Dilatant strengthening as a mechanism for slow slip events, J. Geophys. Res., 115, B12305, https://doi.org/10.1029/2010JB007449, 2010.
Shelly, D. R., Beroza, G. C., Ide, S., and Nakamula, S.: Low-frequency earthquakes in Shikoku, Japan, and their relationship to episodic tremor and slip, Nature, 442, 188–191, https://doi.org/10.1038/nature04931, 2006.
Shibazaki, B. and Iio, Y.: On the physical mechanism of silent slip events along the deeper part of the seismogenic zone, Geophys. Res. Lett., 30, 1489, https://doi.org/10.1029/2003GL017047, 2003.
Shimamoto, T. and Logan, J. M.: Effects of simulated clay gouges on the sliding behavior of Tennessee sandstone, Tectonophysics, 75, 243–255, https://doi.org/10.1016/0040-1951(81)90276-6, 1981.
Siman-Tov, S., Aharonov, E., Sagy, A., and Emmanuel, S.: Nanograins form carbonate fault mirrors, Geology, 41, 703–706, https://doi.org/10.1130/G34087.1, 2013.
Skarbek, R. M. and Savage, H. M.: RSFit3000: A MATLAB GUI-based program for determining rate and state frictional parameters from experimental data, Geosphere, 15, 1665–1676, https://doi.org/10.1130/GES02122.1, 2019.
Song, T.-R. A. and Kim, Y.: Localized seismic anisotropy associated with long-term slow-slip events beneath southern Mexico, Geophys. Res. Lett., 39, L09308, https://doi.org/10.1029/2012GL051324, 2012.
Takahashi, M., Mizoguchi, K., Kitamura, K., and Masuda, K.: Effects of clay content on the frictional strength and fluid transport property of faults, J. Geophys. Res., 112, B08206, https://doi.org/10.1029/2006JB004678, 2007.
Takahashi, M., Uehara, S.-I., Mizoguchi, K., Shimizu, I., Okazaki, K., and Masuda, K.: On the transient response of serpentine (antigorite) gouge to stepwise changes in slip velocity under high-temperature conditions, J. Geophys. Res., 116, B10405, https://doi.org/10.1029/2010JB008062, 2011.
Tarling, M. S., Smith, S. A. F., and Scott, J. M.: Fluid overpressure from chemical reactions in serpentinite within the source region of deep episodic tremor, Nat. Geosci., 12, 1034–1042, https://doi.org/10.1038/s41561-019-0470-z, 2019.
Tembe, S., Lockner, D. A., and Wong, T.-F.: Effect of clay content and mineralogy on frictional sliding behavior of simulated gouges: Binary and ternary mixtures of quartz, illite, and montmorillonite, J. Geophys. Res., 115, B03416, https://doi.org/10.1029/2009JB006383, 2010.
Tesei, T., Harbord, C. W. A., De Paola, N., Collettini, C., and Viti, C.: Friction of mineralogically controlled serpentinites and implications for fault weakness, J. Geophys. Res.-Sol. Ea., 123, 6976–6991, https://doi.org/10.1029/2018JB016058, 2018.
Verberne, B. A., De Bresser, J. H. P., Niemeijer, A. R., Spiers, C. J., de Winter, D. A. M., and Plümper, O.: Nanocrystalline slip zones in calcite fault gouge show intense crystallographic preferred orientation: Crystal plasticity at sub-seismic slip rates at 18–150 ∘C, Geology, 41, 863–866, https://doi.org/10.1130/G34279.1, 2013.
Verberne, B. A., Spiers, C. J., Niemeijer, A. R., De Bresser, J. H. P., de Winter, D. A. M., and Plümper, O.: Frictional properties and microstructure of calcite-rich fault gouges sheared at sub-seismic sliding velocities, Pure Appl. Geophys., 171, 2617–2640, https://doi.org/10.1007/s00024-013-0760-0, 2014a.
Verberne, B. A., Plümper, O., de Winter, D. A. M., and Spiers, C. J.: Superplastic nanofibrous slip zones control seismogenic fault friction, Science, 346, 1342–1344, https://doi.org/10.1126/science.1259003, 2014b.
Viti, C.: Exploring fault rocks at the nanoscale, J. Struct. Geol., 33, 1715–1727, https://doi.org/10.1016/j.jsg.2011.10.005, 2011.
Serpentinite, generated by the hydration of ultramafic rocks, is thought to be related to slow earthquakes at the subduction plate interface in the mantle wedge. We conducted friction experiments on brucite, one of the components of serpentinite, and found that wet brucite exhibits low and unstable friction under low effective normal stress conditions. This result suggests that wet brucite may be key for slow earthquakes at the subduction plate interface in a hydrated mantle wedge.
Serpentinite, generated by the hydration of ultramafic rocks, is thought to be related to slow...