Article
Geosciences, Multidisciplinary
Lorenzo G. Candioti, Thibault Duretz, Stefan M. Schmalholz
Summary: This study focuses on the processes causing subduction zone initiation, with results showing that thermal softening is the main controlling factor and a minimum horizontal force of about 14 TN m(-1) is required for subduction zone initiation.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geochemistry & Geophysics
Shun Guo, Joerg Hermann, Pan Tang, Xu Chu, Yi Chen, Bin Su
Summary: This study reveals that carbon-bearing silicate melts can form through the interaction of slab-derived, carbon-free, silicate melts with eclogite-facies metacarbonate rocks in a subduction-collision environment. This provides a new mechanism for the enrichment of carbon in slab-derived melts and an important pathway for the massive extraction of carbon from subducted slabs.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geochemistry & Geophysics
Santiago Leon, Gaspar Monsalve, Carlos Jaramillo, Gustavo Posada, Tiago Siqueira de Miranda, Sebastian Echeverri, Victor A. Valencia
Summary: The study suggests that increased shear force along a wide seismogenic zone linked to the shallow subduction of the Nazca plate and a poorly lubricated interface may be driving the ongoing topographic uplift of the northern Colombian forearc. In contrast, the smoother relief and lower elevations in the southern Pacific coast of Colombia could be explained by a deficit of shear force available to support higher topography.
Article
Geosciences, Multidisciplinary
Yongfei Zheng, Yixiang Chen, Renxu Chen, Liqun Dai
Summary: This article discusses the changes in the dynamic regime and geothermal gradient of subduction zones at convergent plate boundaries in different stages, as well as the types of metamorphism and magmatism associated with them. These studies are of great significance for understanding the tectonic evolution of the Earth and the formation of rocks.
SCIENCE CHINA-EARTH SCIENCES
(2022)
Article
Multidisciplinary Sciences
M. Gouiza, J. Naliboff
Summary: Observations from rifted margins indicate significant structural and crustal variability during continental extension and breakup. The origin of margin segmentation remains ambiguous due to multiple competing factors. Variations in initial crustal and lithospheric properties can lead to sharp gradients in rifted margin width and timing of breakup, resulting in strong margin segmentation controlled by rheology.
NATURE COMMUNICATIONS
(2021)
Article
Geosciences, Multidisciplinary
Ahmad B. Ahmad, Takeshi Tsuji
Summary: Plate subduction zones generate earthquakes and mountain building through plate collisions, forming complex structures and inducing mass transport like slumps. Advanced 3D seismic data collected in these zones can be analyzed with artificial intelligence techniques, such as convolutional neural networks (CNN), to automatically detect geological features like slump units and faults. The CNN model trained on specific subduction zone data showed high accuracy in identifying slump units and faults, demonstrating the potential for high-resolution geological structure investigation in other regions.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geochemistry & Geophysics
Katja Stanislowski, Alexander Roesner, Matt J. Ikari
Summary: Research indicates that the northern Cascadia plate-boundary fault exhibits frictionally stable behavior and lacks slow slip events, suggesting significant overpressure on the decollement near the trench. This raises the possibility that the megathrust is not fully locked near the trench.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Construction & Building Technology
Yipeng Du, Yongbo Shao, Yifang Cao
Summary: This study investigates the repair method of damaged steel plate shear wall in a steel frame. The test results show that replacing the damaged infilled plates increases the stiffness and improves the seismic performance of the specimen. The study also highlights the importance of investigating the plastic development of the boundary column to ensure reliable post-earthquake performance and easy repair of the steel plate shear wall.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2022)
Article
Engineering, Civil
Hui Guo, Kai Zhang, Tian Ran Lin
Summary: In this study, the free and forced vibration response of a ribbed rectangular cantilever plate representing an aircraft wing section was investigated. A new analytical solution was developed for the vibration analysis, and it was found that the insertion of orthogonal ribs can effectively reduce the vibration of the plate.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2023)
Article
Geosciences, Multidisciplinary
J. B. Ruh, L. Tokle, W. M. Behr
Summary: Variation in the effective strength of the lithosphere is permitted by different deformation mechanisms operating in the crust and upper mantle. A reduction in olivine grain size can cause weakening of the lithosphere, facilitating continental rifting.
Article
Chemistry, Multidisciplinary
Haibo Wang, Wenxuan Wang, Shasha Wu
Summary: The steel-concrete composite truss with a new type of steel-concrete composite joint has high rigidity and load-carrying capacity. This study proposes a theoretical formula for the load-slip relationship of a single PBL shear key in the entire loading process of the composite joint. The results show that the proposed method is in good agreement with the finite element results and experimental values. This research study's results can provide a design method for the internal PBL shear keys of new composite structure joints, promoting the promotion and application of new composite structures.
APPLIED SCIENCES-BASEL
(2023)
Article
Geography, Physical
Jingtao Lai, Alison M. Anders
Summary: Climate plays a significant role in influencing the spatial patterns of glacial erosion by controlling the basal thermal regime of glaciers. The study found that cold temperature limits glacial erosion at high elevations, while increasing precipitation can lead to warm-based conditions and more intensive erosion near mountain peaks. Additionally, the research suggests that there may not be a direct correlation between equilibrium line altitudes (ELAs) and glacial erosion patterns under different climatic conditions.
EARTH SURFACE DYNAMICS
(2021)
Article
Geosciences, Multidisciplinary
Janet T. Watt, Daniel S. Brothers
Summary: Recent studies of destructive megathrust earthquakes and tsunamis in Japan, Sumatra, and Chile have revealed a link between forearc morphology and megathrust behavior. This study focuses on the Cascadia subduction zone in northwestern North America, examining tectonic geomorphology, outer wedge taper, and structural vergence to better understand geologic controls on outer wedge strength and segmentation. Results suggest that variability in outer wedge morphology may reflect spatial variations in shallow megathrust behavior occurring over the last few million years. Comparisons to a global compilation also highlight the need for detailed morphotectonic analyses of subduction zones worldwide.
Article
Biophysics
Tom J. W. Buurke, Lotte van de Venis, Rob den Otter, Jorik Nonnekes, Noel Keijsers
Summary: Dynamic balance control during human walking can be described by the distance between the mediolateral extrapolated center of mass (XCoM) position and the base of support, the margin of stability (MoS). In this study, a ground reaction force (GRF)-based method and a marker-based method were compared for estimating the mediolateral center of mass (CoM), XCoM, and MoS during treadmill walking. The results showed high correlation coefficients and small differences between the two methods for ML CoM and ML XCoM. However, the GRF-based method resulted in larger ML XCoM excursion and smaller ML MoS values compared to the marker-based method. Despite these differences, the GRF-based method is still valid and can provide real-time feedback during treadmill gait training.
JOURNAL OF BIOMECHANICS
(2023)
Article
Mechanics
Rumpa Chakraborty, Gour Das
Summary: This paper presents a theoretical analysis of surface gravity wave propagation by oblique incidence wave through a thin elastic plate submerged in water with ice cover. The study utilizes Green's function technique to derive the boundary conditions and solve for the reflection and transmission energy coefficients numerically. The results demonstrate the significant influence of ice cover on the behavior of these coefficients.
ARCHIVE OF APPLIED MECHANICS
(2023)
Article
Geochemistry & Geophysics
Ina Storch, Stefan Buske, Pia Victor, Onno Oncken
Summary: The study conducted in the Northern Chilean subduction zone involved detailed geological investigations and data analysis, revealing pre-earthquake geological features, proposing views on plate interface reflectivity variations, and observing complex seismic activities between plates. The research results also revealed the existence of two distinct geological units beneath the continental slope, with seismic activities used to infer interactions between plates.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geochemistry & Geophysics
Simone Cesca, Carla Valenzuela Malebran, Jose Angel Lopez-Comino, Timothy Davis, Carlos Tassara, Onno Oncken, Torsten Dahm
Summary: The seismic doublet that occurred near the Juan Fernandez microplate on October 9, 2014, is the largest earthquake recorded in the region, with a complex sequence of thrust and strike-slip earthquakes along different structures. The seismic activity, including large thrust earthquakes, appears to be partially accommodated aseismically in the northern part of the microplate and its boundary, but still poses a significant hazard with tsunamigenic potential for islands in the South Pacific region.
Article
Geosciences, Multidisciplinary
Andrea Hampel, Ralf Hetzel, Maria-Sophie Erdmann
Summary: Using high-resolution digital elevation models derived from lidar data, this study investigated the asymmetrical postglacial slip distribution along the strike of the Teton fault, revealing vertical displacement differences across tectonically offset geomorphological features along the entire front of the Teton Range. The results indicate that the maximum vertical displacements are located in specific areas north of Jenny Lake and along the southwestern shore of Jackson Lake.
Article
Geosciences, Multidisciplinary
Reinhard Wolff, Ralf Hetzel, Istvan Dunkl, Aneta A. Anczkiewicz
Summary: The study utilizes various methods to constrain the exhumation history of the Tauern Window in the footwall of the Brenner fault, revealing a fault-slip rate of approximately 3.9 km/Myr, and exhumation rates of around 1.1-1.3 km/Myr. Additionally, the thermokinematic model effectively predicts the heat transfer processes related to this extensional fault system.
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
Armin Dielforder, Igor M. Villa, Alfons Berger, Marco Herwegh
Summary: This study presents the strontium isotope ratios of vein carbonates from the Central European Alps, which helps to understand the tectonic evolution of fold-and-thrust belts. The vein carbonates can trace the evolution of pore fluids and provide insights into the deformation events.
GEOLOGICAL MAGAZINE
(2022)
Article
Geosciences, Multidisciplinary
O. Oncken, S. Angiboust, G. Dresen
Summary: The study explores the microstructures of cataclasites in subduction zones and deformation rates associated with slow earthquakes, indicating that cataclastic flow is the dominant physical mechanism governing transient creep episodes. The results suggest that seismic slip events may reduce fluid pressures, promoting pressure-solution creep.
Article
Geography, Physical
Andreas Woelfler, Andrea Hampel, Armin Dielforder, Ralf Hetzel, Christoph Glotzbach
Summary: This study presents the first Be-10 surface exposure ages from the eastern Alps east of the Tauern Window, providing insights into the Last Glacial Maximum ice extent and deglaciation history. Results indicate that the Gurktal Alps deglaciated between 16 and 14 ka, in line with ice-sheet model predictions, while the Lavantal Alps may have been ice free or partially covered by ice before the Last Glacial Maximum. These findings suggest potential overestimation of ice extent by ice-sheet models in the easternmost Alps.
JOURNAL OF QUATERNARY SCIENCE
(2022)
Article
Geology
Andrew Nicol, John Begg, Vasso Saltogianni, Vasiliki Mouslopoulou, Onno Oncken, Andrew Howell
Summary: The Kaikoura Earthquake uplifted Kaikoura Peninsula by approximately 1 m, mainly resulting from slip on multiple faults. The variable co-seismic uplift in 2016 can be reproduced by slip on different faults. The tilting of Late Quaternary marine terraces is primarily influenced by slip rates on the OSTF and ABF.
NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS
(2023)
Article
Multidisciplinary Sciences
Xudong Zhao, Huiping Zhang, Ralf Hetzel, Eric Kirby, Alison R. Duvall, Kelin X. Whipple, Jianguo Xiong, Yifei Li, Jianzhang Pang, Ying Wang, Ping Wang, Kang Liu, Pengfei Ma, Bo Zhang, Xuemei Li, Jiawei Zhang, Peizhen Zhang
Summary: This study provides evidence for the existence of a continental-scale river system in eastern Tibet before the India-Asia collision, which developed an extensive low-relief landscape that was uplifted and dissected during the late Cenozoic. The results challenge existing models of drainage networks and reveal the importance of Late Cretaceous paleotopography.
NATURE COMMUNICATIONS
(2021)
Article
Geochemistry & Geophysics
Reinhard Wolff, Kyra Hoelzer, Ralf Hetzel, Qiang Xu, Istvan Dunkl, Aneta A. Anczkiewicz, Zhenyu Li
Summary: The subsurface structure of the Himalaya is dominated by the seismically active Main Himalayan Thrust fault. The geometry of the Main Himalayan Thrust in central Nepal has a flat-ramp-flat shape, while the geometry in the northern High Himalaya is still uncertain. Through new data from the Gyimng region in China, it has been determined that the ramp has a greater width and reaches a greater depth below the northern High Himalaya than previously thought. The fault is presumed to develop as a gently-dipping ductile shear zone farther north.
Article
Geochemistry & Geophysics
C. Sippl, A. Dielforder, T. John, S. M. Schmalholz
Summary: The study reveals that the intraslab stress field in double seismic zones is more variable than previously thought, with a classical pattern of compressive over extensive events observed in only about half of the global double seismic zone locations. The occurrence of DSZ seismicity is not limited to regions of slab bending, and there is no clear global prevalence of slab unbending at intermediate depths. Focal mechanism observations are often inconsistent with bending estimates from slab geometries, suggesting that other stress types may also play an important role.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2022)
Article
Geosciences, Multidisciplinary
A. Dielforder, G. M. Bocchini, K. Kemna, A. Hampel, R. M. Harrington, O. Oncken
Summary: Numerous normal-faulting aftershocks commonly occur in subduction forearcs after large megathrust earthquakes. The occurrence of postseismic normal faulting is due to stress changes induced by the stress drop along the megathrust. However, the details of forearc stress changes and aftershock triggering mechanisms are still not well understood. In this study, numerical force-balance models combined with Coulomb failure analysis are used to show that the stress drop along the megathrust can support normal faulting, and forearc-wide aftershock triggering is feasible within a narrow range of megathrust stress drop values and preseismic stress states.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Mary Ford, Emmanuel Masini, Jaume Verges, Raphael Pik, Sebastien Ternois, Julien Leger, Armin Dielforder, Gianluca Frasca, Arjan Grool, Constance Vinciguerra, Thomas Bernard, Paul Angrand, Antoine Cremades, Gianreto Manatschal, Sebastien Chevrot, Laurent Jolivet, Frederic Mouthereau, Isabelle Thinon, Sylvain Calassou
Summary: This paper provides an overview of the formation and evolution of the Pyrenees, focusing on the early convergence stage. It highlights the contributions of the OROGEN project and the integration of its results with other collaborative projects. The paper also discusses the role of salt tectonics in the region.
BSGF-EARTH SCIENCES BULLETIN
(2022)
Article
Geosciences, Multidisciplinary
Samuel Angiboust, Armel Menant, Taras Gerya, Onno Oncken
Summary: The article reviews several decades of research on the tectonic transport processes in accretionary wedges, focusing on underplating and tectonic erosion. Through geochronological characteristics and zircon detrital ages, ancient active margins can be deciphered. Two-dimensional thermo-mechanical experiments help understand mass-flow pathways and the distribution of stresses in subduction zones, revealing the dynamical instability of fluid-bearing accretionary systems.
