Article
Geochemistry & Geophysics
Dunyu Liu, Benchun Duan, Katherine Scharer, Doug Yule
Summary: Understanding the mechanical conditions that lead to complexity in earthquakes is crucial for seismic hazard analysis. This study uses physics-based dynamic models to simulate the effects of complex fault geometry and interseismic stress accumulation on earthquake recurrence. The findings show that these factors contribute to rupture segmentation and variability in earthquake recurrence. The study provides important insights for ground shaking assessment in the region.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geosciences, Multidisciplinary
Xiongnan Huang, Xiaoping Yang, Haibo Yang, Zongkai Hu, Ling Zhang
Summary: The Hexi Corridor, located beyond the northeastern edge of the Tibetan Plateau, has experienced multiple destructive earthquakes in history, indicating a high seismic risk in the region. A detailed study of the 1609 Hongyapu earthquake along the Fodongmiao-Hongyazi fault suggests a multisegment rupture and estimates the magnitude of the event as around Mw 7.2-Mw 7.4.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
L. Jiao, Y. Klinger, L. Scholtes
Summary: Through numerical modeling, this study demonstrates that during shearing of a layer of brittle material, oblique Riedel fractures nucleate with a regular spacing controlled by the layer's thickness, which then influences the spatial structuration of the entire fault system. An analysis of horizontal stress distribution reveals a threshold at a ratio of 1.5 between inter-Riedel distance and material thickness, beyond which new fractures nucleate due to a switch from compressional to tensional stress.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geochemistry & Geophysics
Lei Zhang, Yajing Liu, Duo Li, Hongyu Yu, Changrong He
Summary: The study examines the impact of fault geometry on coseismic rupture and paleoseismic behavior through earthquake sequence modeling on the Yingxiu-Beichuan Fault (YBF) of the 2008 Wenchuan earthquake. The results demonstrate consistent patterns with field observations, illustrating whole-fault ruptures and partial rupture events. The magnitude of the earthquakes is influenced by the location along the fault, with larger events occurring in the southern segment of the YBF. The recurrence intervals of the events are primarily determined by the tectonic loading rate. The study also highlights the importance of fault strike angle in controlling coseismic slip distribution.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
R. A. Harris, M. Barall, D. A. Lockner, D. E. Moore, D. A. Ponce, R. W. Graymer, G. Funning, C. A. Morrow, C. Kyriakopoulos, D. Eberhart-Phillips
Summary: This study used physics-based dynamic rupture modeling to numerically simulate earthquakes on the Hayward fault and its connected faults. The research found that rock properties, earthquake nucleation locations, fault geometry, and fault creep patterns are crucial factors influencing the rupture behavior.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geochemistry & Geophysics
Marco Pizza, Maria Francesca Ferrario, Frank Thomas, Giorgio Tringali, Franz Livio
Summary: Surface faulting is a common phenomenon for crustal earthquakes and poses a significant hazard to buildings and infrastructure. This study aims to update the regressions characterizing the likelihood of surface faulting in order to provide a better evaluation of the hazard.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2023)
Article
Geosciences, Multidisciplinary
Salvatore Iacoletti, Gemma Cremen, Carmine Galasso
Summary: The study reviews the modeling assumptions in fault-based probabilistic seismic hazard analysis and proposes a framework to integrate these assumptions, revealing the significant impact of segmentation assumptions and fault interactions on seismic hazard estimates.
EARTH-SCIENCE REVIEWS
(2021)
Article
Geochemistry & Geophysics
Richard H. Styron, Brian Sherrod
Summary: This study utilizes the Bayesian inversion method of Biasi and Weldon (2006) to estimate the magnitude of 27 late-Pleistocene to Holocene paleoearthquakes in the Puget Lowland region of Washington by incorporating both rupture length and surface displacement measurements. Results suggest that shorter rupture lengths may decrease earthquake magnitudes and uncertainties, impacting seismic hazard in the region.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2021)
Article
Geosciences, Multidisciplinary
Maren Bose, Allie A. Hutchison, Isabelle Manighetti, Jiawei Li, Frederick Massin, John Francis Clinton
Summary: The paper introduces two extensions to the FinDer algorithm, called FinDerS and FinDerS+, which calculate real-time earthquake slip profiles by taking into account geological properties, structural maturity of the source fault, and relation to earthquake slip distribution. These new algorithms provide alternate and better informed magnitude estimates using mean slip values derived from fault source maturity integration.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
J. C. Lozos
Summary: This study investigates the conditions under which rupture occurs on two component faults simultaneously in an orthogonal strike-slip fault system through dynamic rupture simulations. The results show that only when slip on the first fault reduces the normal stress on the second fault, or when a stopping phase occurs due to the termination of the first fault at the cross fault, multifault ruptures occur.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geochemistry & Geophysics
Max Suter
Summary: This article documents earthquake intensity observations and catalogs in the Puebla-Tlaxcala region of central Mexico between 1542 and 1740. The study suggests that earthquake ground shaking in the area is caused by various tectonic activities, including faulting, subduction interface thrust earthquakes, and magmatic injection. Most of the earthquakes mentioned in historical sources were felt locally, indicating either magmatic dike-induced earthquakes or fault motion in the Tlaxcala-Huamantla half-graben. The significance of this study is to provide insights into historical earthquake activity in central Mexico.
SEISMOLOGICAL RESEARCH LETTERS
(2022)
Article
Geochemistry & Geophysics
Angela Meneses-Gutierrez, Paul Segall, Takeshi Sagiya
Summary: This study analyzed conventional horizontal geodetic data and GPS data from 1890 to 2009 in NE Japan to investigate interseismic deformation over a centennial time scale. The results show that the conventional geodetic data and observations during the GPS era are comparable, suggesting that the deceleration of strain rate before the 2011 Tohoku-oki earthquake did not start prior to the beginning of GPS observations in the mid-1990s. Further research is needed to integrate these results with observations of vertical deformation and physical modeling for a better understanding of the tectonic and seismological implications.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
Wenqian Yao, Jing Liu-Zeng, Yann Klinger, Zijun Wang, Yanxiu Shao, Longfei Han, Wei Wang, Jinyu Zhang, Zhijun Liu
Summary: Understanding strain partitioning along different fault strands is important for studying strike-slip faults. This study quantified the slip rate of the Zihong Shan fault, a southernmost strand of the Hasi Shan restraining bend of the Haiyuan fault, using high-resolution DEMs, orthophotos, and microtopography analysis. The results show a left-lateral slip rate of 1.9 +/- 0.6 mm/yr since around 13 ka, which is similar to the rate of the main Hasi Shan branch.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geosciences, Multidisciplinary
Jidong Yang, Hejun Zhu, Thorne Lay, Yufeng Niu, Lingling Ye, Zhong Lu, Bingxu Luo, Hiroo Kanamori, Jianping Huang, Zhenchun Li
Summary: The earthquake near Stanley, Idaho in March 2020 was caused by a complex source, involving a pair of opposing-dip faults with strike-slip and normal faulting. The converging fault geometry allowed the rupture to traverse a 10-km-wide step, which is uncommon in earthquake ruptures. This study provides insights into the rupture process of earthquakes near the northern boundary of the Centennial Tectonic Belt.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geochemistry & Geophysics
Jia-Cian Gao, Chung -Han Chan, Kuo-Fong Ma, Chyi-Tyi Lee
Summary: Coseismic surface displacements can cause damage to structures, and probabilistic fault displacement hazard analysis (PFDHA) is proposed to estimate expected displacement. A field investigation of the surface ruptures caused by the Hualien earthquake in Taiwan provided crucial information for PFDHA. Comparing the observations to predictions, most were within one standard deviation, supporting the application of PFDHA.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2022)
Article
Public, Environmental & Occupational Health
Richard A. Schultz, Douglas W. Hubbard, David J. Evans, Sam L. Savage
Article
Geochemistry & Geophysics
Alexis Grare, Antonio Benedicto, Julien Mercadier, Olivier Lacombe, Anna Trave, Marie Guilcher, Antonin Richard, Patrick Ledru, Mario Blain, John Robbins, Philippe Lach
Summary: The Kiggavik area in Nunavut, Canada, hosts uranium mineralization in Archean basement rocks with a major fault/fracture network mainly oriented ENE-WSW and NE-SW. The faults in this area were mineralized in four stages initiated during different orogenies, with evidence of primary uranium stock and structural control on mineralization. The evolution of uranium mineralization in the Kiggavik area shows similarities to the world-class uranium district of the Athabasca Basin in Saskatchewan, Canada.
MINERALIUM DEPOSITA
(2021)
Article
Mechanics
Kaimin Yue, Hunjoo P. Lee, Jon E. Olson, Richard A. Schultz
ENGINEERING FRACTURE MECHANICS
(2020)
Article
Geochemistry & Geophysics
Krisztian Fintor, Andrea Varga
Article
Geochemistry & Geophysics
David Quirt, Antonio Benedicto
Article
Geochemistry & Geophysics
Daniel Munoz-Lopez, David Cruset, Irene Cantarero, Antonio Benedicto, Cedric M. John, Anna Trave
Article
Geosciences, Multidisciplinary
David Cruset, Irene Cantarero, Antonio Benedicto, Cedric M. John, Jaume Verges, Richard Albert, Axel Gerdes, Anna Trave
MARINE AND PETROLEUM GEOLOGY
(2020)
Article
Energy & Fuels
Richard A. Schultz, David J. Evans
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2020)
Article
Geochemistry & Geophysics
Antonio Benedicto, Maher Abdelrazek, Patrick Ledru, Cameron MacKay, Dwayne Kinar
Summary: The study examines the combination of fluid composition, geochemical traps, and structural traps that lead to unconformity-related uranium deposits in the Athabasca Basin. It explores the role of mesoscale structural controls and inherited shear zones in the formation of uranium deposits, providing new insights into the understanding of mineralization processes at both micro- and regional-scales.
Correction
Public, Environmental & Occupational Health
Richard A. Schultz, Douglas W. Hubbard, David J. Evans, Sam L. Savage
Article
Geosciences, Multidisciplinary
David Cruset, Jaume Verges, Antonio Benedicto, Enrique Gomez-Rivas, Irene Cantarero, Cedric M. John, Anna Trave
Summary: The study reconstructs the fluid flow evolution of a portion of the inverted Pyrenean rift, emphasizing on the movement of different types of fluids in fractures at different evolution stages, which could have significant implications on the occurrence of mineralization.
Article
Geochemistry & Geophysics
Maher Abdelrazek, Antonio Benedicto, Olivier Gerbeaud, Patrick Ledru
Summary: Uranium mineralization in the Patterson Lake corridor of Canada is hosted in metamorphosed Paleoproterozoic basement covered by sandstone formations of the Athabasca Basin. Structural evolution, alteration, and mineralization are linked in the basement, with fertile structures undergoing multiple phases of deformation, reactivation, and dissolution processes leading to the formation of uranium orebodies, as seen in the Spitfire prospect.
GEOCHEMISTRY-EXPLORATION ENVIRONMENT ANALYSIS
(2021)
Article
Geosciences, Multidisciplinary
Oriane Parizot, Yves Missenard, Frederic Haurine, Thomas Blaise, Jocelyn Barbarand, Antonio Benedicto, Philippe Sarda
Summary: The study on syn-faulting calcites in the northern foreland basin of the Pyrenees reveals significant deformations from the Eocene to the Miocene. This suggests a complex tectonic evolution of the Pyrenean orogen over different geological periods, possibly influenced by the interaction between Africa, Iberia, and Europe.
Article
Energy & Fuels
Abdulaziz Almansour, Stephen E. Laubach, J. Eric Bickel, Richard A. Schultz
SPE RESERVOIR EVALUATION & ENGINEERING
(2020)
Article
Multidisciplinary Sciences
David Cruset, Irene Cantarero, Antonio Benedicto, Cedric M. John, Jaume Verges, Richard Albert, Axel Gerdes, Anna Trave