Article
Geochemistry & Geophysics
Shiying Nie, Sylvain Barbot
Summary: This study examines the dynamics of fault behavior in the parametric space of frictional conditions, showing that seismogenic slow-slip events are natural for homogeneous faults under near velocity-neutral conditions. The presence of material heterogeneity may explain the spatio-temporal clustering and migration features of tremor activity.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Multidisciplinary Sciences
Sangwoo Woo, Raehee Han, Kiyokazu Oohashi
Summary: Rapid slip during earthquakes can cause frictional melting in rocks, which has long been considered a disequilibrium process. We conducted experiments on different types of silicate rocks at a slip rate of 1.3 m/s and found that all minerals in the rocks melt at temperatures below their known melting temperatures. The low-temperature melting is caused by grain size reduction and phase boundary reactions during different stages of slip. These new findings and estimated melting temperatures are important for understanding the mechanics of earthquakes, landslides, and caldera collapses.
SCIENTIFIC REPORTS
(2023)
Article
Geochemistry & Geophysics
F. Paglialunga, F. Passelegue, S. Latour, A. Gounon, M. Violay
Summary: Fluids in the Earth's crust affect the stability and dynamics of faults, and viscous fluids have been found to play a significant role in fault reactivation and earthquake ruptures. In experiments using analogue material, it was discovered that the presence of viscous lubricants along faults reduces frictional resistance, increases nucleation length, and decreases fracture energy. Furthermore, the higher the viscosity of the fluids, the greater the reduction in frictional strength and increase in nucleation length.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geochemistry & Geophysics
Diego Molina, Andres Tassara, Rodrigo Abarca, Daniel Melnick, Andrea Madella
Summary: A formal seismic segmentation model of the Chile Margin was presented using multivariate analysis, with principal component analysis revealing a first-order along-trench tendency among three frictional structure proxies. By comparing with earthquake rupture areas and using friction theory, the study inferred the limits of the velocity-weakening seismogenic zone.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geochemistry & Geophysics
Felix Waldhauser, David P. Schaff
Summary: Repeating earthquakes play a significant role in the study of seismic source processes and fault behavior, and have the potential to enhance hazard assessment and earthquake forecasting. A systematic analysis in northern California from 1984 to 2014 identified a large number of repeating earthquake sequences, showing temporal behavior ranging from random to quasi-periodic over a 30-year observation period. These sequences are found predominantly along faults within the San Andreas Fault system that exhibit surface creep.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geosciences, Multidisciplinary
Yohan Park, Takehiro Hirose, Jin-Han Ree
Summary: Frictional healing is a key mechanism in controlling fault strength recovery, and carbonate fault mirrors exhibit unique behavior with significantly lower frictional healing rates. The presence of densely packed sintered nanogouges in fault mirrors hinders the chemical and physical processes that lead to frictional healing, potentially causing aseismic creep.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Physics, Fluids & Plasmas
Anna Pomyalov, Yuri Lubomirsky, Lara Braverman, Efim A. Brener, Eran Bouchbinder
Summary: A numerical study is conducted on self-healing slip pulses, which are solitonic structures propagating in frictional systems. The solutions show diverging length and strongly inertial propagation velocities when the driving stress approaches the frictional strength at a local minimum. An approximate scaling theory explains these observations quantitatively. The derived pulse solutions exhibit significant spatially-extended dissipation and an unconventional edge singularity.
Article
Physics, Fluids & Plasmas
Kjetil Thogersen, Einat Aharonov, Fabian Barras, Francois Renard
Summary: This study introduces a minimal one-dimensional continuum model for the transition from cracklike to pulselike propagation of frictional rupture. With only two free parameters, the model predicts stable slip pulse solutions for slip boundary conditions and unstable slip pulse solutions for stress boundary conditions. The results indicate that pulselike propagation along frictional interfaces may be a general feature in systems of finite thickness with a wide range of friction constitutive laws, solely based on elastic relaxation and redistribution of initial prestress.
Article
Geochemistry & Geophysics
Xiuli Yan, Bo Zhang, Guodong Wang, Tao Yang, Jianye Chen
Summary: This study investigates fault rocks and protoliths from the Shaba outcrop (Beichuan County) on the Yingxiu-Beichuan Fault ruptured during the 2008 Wenchuan Mw 7.9 earthquake using rock magnetic measurements and electron microscopic observations. The results show that pyrrhotite, a product of pyrite alteration at high temperatures, is present in fault gouges, indicating frictional heating during earthquake slip. Additionally, the presence of goethite suggests the presence of hot fluids within the fault zone. These findings suggest that thermal pressurization may be a plausible mechanism of coseismic fault weakening during the Wenchuan earthquake.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2023)
Article
Geochemistry & Geophysics
Kali L. Allison, Eric M. Dunham
Summary: This study investigates the transition from localized frictional sliding on faults to distributed deformation in viscous shear zones in the continental crust, controlled by lithospheric thermal structure and composition. The research uses 2D simulations to analyze the effects of thermal anomaly, seismic and aseismic slip, and the transition from frictional sliding to viscous flow on earthquake depth extent. The results highlight the importance of understanding lithospheric rheology and thermal models for evaluating earthquake ruptures and postseismic crustal deformation.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geochemistry & Geophysics
Yao WenMing, Zhou YongSheng, Zhang Lei, Ma Xi, Dai WenHao
Summary: This study conducted frictional experiments on pseudotachylyte gouges under both hydrothermal and dry conditions. The results showed that the friction coefficient of pseudotachylyte gouges increased with increasing temperature and was lower in dry samples compared to hydrothermal conditions. The slip stability of pseudotachylyte gouges exhibited velocity strengthening at lower temperatures and velocity weakening at higher temperatures. Loading rate also affected the stability of pseudotachylyte gouges. The presence of pseudotachylyte could increase the possibility of earthquake nucleation and promote the propagation of co-seismic dynamic rupture.
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
(2022)
Article
Geosciences, Multidisciplinary
W. F. Hoover, C. B. Condit, P. C. Lindquist, A. C. Moser, V. E. Guevara
Summary: This study investigates the microstructures of actinolite in talc-bearing and talc-free rocks to understand the relationship between actinolite deformation mechanism and slow slip activity. The results highlight the importance of considering fluid-mediated chemical change in studies of subduction zone deformation and seismicity.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Materials Science, Ceramics
Thomas Herisson de Beauvoir, Elise Benard, Geoffroy Chevallier, Claude Estournes
Summary: This study prepared yttria stabilized zirconia ceramics using Flash-SPS at different temperatures and analyzed the influence of sintering temperature on microstructure. The results showed that the maximum densification rate was achieved at 1600 degrees C and decreased with increasing sintering temperature. The presence of a thermal gradient in the samples also resulted in heterogeneity in grain size and morphology.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Geochemistry & Geophysics
Fabian Barras, Kjetil Thogersen, Einat Aharonov, Francois Renard
Summary: The question of what arrests an earthquake rupture is crucial for predicting earthquake magnitude. Using a minimal model, researchers have identified the basic physical parameters that may control the arrest of large ruptures and derived closed-form expressions to predict rupture arrest under different conditions.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geochemistry & Geophysics
Benjamin D. Belzer, Melodie E. French
Summary: Chlorite, a phyllosilicate mineral, was studied to understand its role in fault slip. The experiments revealed that its frictional strength increases with temperature and transitions from rate-strengthening to rate-weakening behavior. The results suggest that the rate-weakening behavior is controlled by time-dependent properties of water adsorbed to mineral surfaces.
Article
Chemistry, Physical
Kaiwen Tian, Nitya N. Gosvami, David L. Goldsby, Robert W. Carpick
JOURNAL OF PHYSICAL CHEMISTRY B
(2018)
Article
Physics, Multidisciplinary
Kaiwen Tian, David L. Goldsby, Robert W. Carpick
PHYSICAL REVIEW LETTERS
(2018)
Article
Geosciences, Multidisciplinary
Lisa Craw, Chao Qi, David J. Prior, David L. Goldsby, Daeyeong Kim
JOURNAL OF STRUCTURAL GEOLOGY
(2018)
Article
Geosciences, Multidisciplinary
C. A. Thom, R. W. Carpick, D. L. Goldsby
GEOPHYSICAL RESEARCH LETTERS
(2018)
Article
Geosciences, Multidisciplinary
Chao Qi, Laura A. Stern, Asmin Pathare, William B. Durham, David L. Goldsby
GEOPHYSICAL RESEARCH LETTERS
(2018)
Article
Geochemistry & Geophysics
Lars N. Hansen, Kathryn M. Kumamoto, Christopher A. Thom, David Wallis, William B. Durham, David L. Goldsby, Thomas Breithaupt, Cameron D. Meyers, David L. Kohlstedt
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2019)
Article
Chemistry, Multidisciplinary
Kaiwen Tian, Zhuohan Li, Nitya N. Gosvami, David L. Goldsby, Izabela Szlufarska, Robert W. Carpick
Article
Physics, Multidisciplinary
Kaiwen Tian, Zhuohan Li, Yun Liu, Nitya N. Gosvami, David L. Goldsby, Izabela Szlufarska, Robert W. Carpick
PHYSICAL REVIEW LETTERS
(2020)
Article
Geochemistry & Geophysics
Nir Z. Badt, Terry E. Tullis, Greg Hirth, David L. Goldsby
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2020)
Article
Geochemistry & Geophysics
David Wallis, Lars N. Hansen, Kathryn M. Kumamoto, Christopher A. Thom, Oliver Plumper, Markus Ohl, William B. Durham, David L. Goldsby, David E. J. Armstrong, Cameron D. Meyers, Rellie M. Goddard, Jessica M. Warren, Thomas Breithaupt, Martyn R. Drury, Angus J. Wilkinson
EARTH AND PLANETARY SCIENCE LETTERS
(2020)
Article
Materials Science, Multidisciplinary
Sheng Fan, David J. Prior, Andrew J. Cross, David L. Goldsby, Travis F. Hager, Marianne Negrini, Chao Qi
Summary: This study proposes grain boundary irregularity as a means of distinguishing between recrystallized and remnant grains, and analyzes the relationship between grain boundary irregularity and sphericity parameter Psi using experimental data. The similar grain boundary migration rates at high and low temperatures suggest a balance between boundary mobility and driving force influencing the migration rate.
Article
Geography, Physical
Sheng Fan, Travis F. Hager, David J. Prior, Andrew J. Cross, David L. Goldsby, Chao Qi, Marianne Negrini, John Wheeler
Article
Geosciences, Multidisciplinary
A. J. Cross, D. L. Goldsby, T. F. Hager, I. B. Smith
GEOPHYSICAL RESEARCH LETTERS
(2020)
Article
Geosciences, Multidisciplinary
Christopher A. Thom, David L. Goldsby
Article
Geography, Physical
Chao Qi, David J. Prior, Lisa Craw, Sheng Fan, Maria-Gema Llorens, Albert Griera, Marianne Negrini, Paul D. Bons, David L. Goldsby