Article
Geochemistry & Geophysics
Cornelius O. Schwarze, Nina Kukowski
Summary: Understanding the mechanics of outer forearcs, influenced by the frictional properties of the plate interface, is crucial for studying natural hazards like earthquakes and slumping. Previous research suggests that the Hikurangi margin offshore New Zealand exhibits variable mechanics along its length. However, the relationship between the morphology of the submarine margin and the plate boundary's effective decollement strength is not fully understood. Using gridded data of surface slope and plate dip, this study characterizes the central and northern Hikurangi margin and reveals significant regional variability in the effective decollement strength of the Pacific-Australian plate boundary.
Article
Geochemistry & Geophysics
P. G. DeCelles, B. Carrapa
Summary: Spatial and temporal coincidences in rapid bedrock exhumation, topographic evolution, monsoonal precipitation, foreland basin deposits, and thrust fault development in central Nepal suggest a model linking these phenomena. Rapid erosion in the Narayani River basin may be caused by intense monsoonal precipitation, resulting in increased flexural subsidence and surface aggradation in the foreland, ultimately making the region more susceptible to anomalous thrust front propagation.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Engineering, Marine
Yuriy N. Savchenko, Georgiy Y. Savchenko, Yuriy A. Semenov
Summary: A study was conducted on cavity flow around a wedge with rounded edges, considering surface tension effect and the Brillouin-Villat criterion. An analytical solution was obtained, analyzing boundary curvature and critical Weber numbers. It was found that there are limitations to the model based on the Brillouin-Villat criterion, particularly when dealing with sharp wedge edges.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Forestry
Karen Janones da Rocha, Cesar Augusto Guimaraes Finger, Cyro Matheus Cometti Favalessa, Sidney Fernando Caldeira, Frederico Dimas Fleig
Summary: This study aimed to develop suitable equations for accurately estimating the stem diameters and volume of Tectona grandis trees in the central-western region of Brazil. The Clark III et al. equation was found to be the most appropriate equation for estimating the diameters and volume of these trees.
Article
Dentistry, Oral Surgery & Medicine
Xavier Lepe, Kerry R. Streiff, Glen H. Johnson
Summary: The study aimed to evaluate the long-term retention of zirconia crowns cemented with two automixed cements. Results showed that two of the three cements (RXL, RXUA) demonstrated high retention strength, while the third cement (RXLA) had significantly lower retention, with cement found only on the intaglio surface after separation.
JOURNAL OF PROSTHETIC DENTISTRY
(2021)
Article
Mathematics, Applied
Xiang Mu, Xiaoyu Fu, Liangliang Zhang, Zhaowei Zhu, Jinming Zhang, Yang Gao
Summary: This paper investigates two problems of a one-dimensional piezoelectric quasicrystal wedge, namely, the effects of uniform tractions on both sides of the wedge and the effect of concentrated force on the wedge apex. The analytical expressions of displacements and stresses are derived using the Stroh formalism and Barnett-Lothe matrices, and the generalized solutions for the critical wedge angles are discussed. Numerical examples are provided to demonstrate the mechanical behaviors of the wedge in each field. The results show that the effects of uniform tractions and concentrated force on the phonon field displacement are larger than those on the phason field.
APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION
(2022)
Article
Geochemistry & Geophysics
Gabe S. Epstein, Gray E. Bebout, Samuel Angiboust
Summary: Fluid flow along Western Alps paleo-subduction interfaces in NW Italy was focused by high strain rates, leading to extensive chemical alteration and shifts in O isotope compositions due to fluid-rock interactions at high-P, low-T conditions. The flushing of structures by H2O-rich fluids resulted in metasomatic reaction zones and prominent reactions among various rock types. Evidence suggests pressure solution and partitioning of fluid-mobile elements, with fluid flow leading to carbonate and SiO2 deposition proximal to structures.
Article
Geochemistry & Geophysics
Emilija Krsnik, Katharina Methner, Marion Campani, Svetlana Botsyun, Sebastian G. Mutz, Todd A. Ehlers, Oliver Kempf, Jens Fiebig, Fritz Schlunegger, Andreas Mulch
Summary: Reconstructing the Oligocene-Miocene paleoelevation of the European Central Alps reveals that the region attained surface elevations of >4000 m in the mid-Miocene (around 14.5 Ma), based on stable and clumped isotope measurements.
Article
Geosciences, Multidisciplinary
Uwe Ring, Johannes Glodny
Summary: This study highlights the important role of tangential stretching in the Central Alps and defines multiple stages of tectonic movements through geochronological analysis. The data provide important insights into the geological evolution of the Alps, with implications for current tectonic models.
EARTH-SCIENCE REVIEWS
(2021)
Article
Chemistry, Physical
Rizwan Muneer, Peyman Pourafshary, Muhammad Rehan Hashmet
Summary: This study presents a new integrated model that incorporates electrostatic, gravitational, and hydrodynamic forces to accurately predict fines migration. Experimental validation demonstrated the accuracy of the model.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Geosciences, Multidisciplinary
Indira Rodriguez, Josep Poblet, Mayte Bulnes, Joan Flinch, Massimiliano Masini
Summary: The analysis of geological sections and exploration wells in the Sind Fold Belt has provided crucial insights into its evolution, structural features, and geological properties.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Orthopedics
Masanori Fujii, Kenji Kitamura, Satoshi Ikemura, Satoshi Hamai, Goro Motomura, Yasuharu Nakashima
Summary: Pneumatic femoral broaching in total hip arthroplasty has shown to reduce stem subsidence and improve canal fill ratio. Factors such as manual broaching and decreased canal fill ratio 60 mm below the lesser trochanter have been found to affect post-operative stem subsidence. At the latest follow-up, all stems showed stable fixation by bone ingrowth in both groups.
INTERNATIONAL ORTHOPAEDICS
(2022)
Article
Geography, Physical
Mauro Guglielmin, Stefano Ponti, Emanuele Forte, Nicoletta Cannone
Summary: In the Italian Central Alps near the Stelvio Pass, significant air warming has contributed to the rapid increase in permafrost temperature and the development of thermokarst depressions since 1999. The area remained free of vegetation until early 2000, when vegetation colonization started in response to the thermokarst development and summer warming. The observed responses and dynamics of the alpine tundra in this region show similarities with the Arctic tundra in terms of both permafrost and vegetation.
PERMAFROST AND PERIGLACIAL PROCESSES
(2021)
Article
Geosciences, Multidisciplinary
Sinah Kilian, Hugo Ortner, Barbara Schneider-Muntau
Summary: The study is based on numerical modeling of folds in the western Northern Calcareous Alps fold-and-thrust belt, revealing the importance of a weak incompetent base layer for facilitating folding and the need for erosion to remove half of the competent layer before folding can occur.
JOURNAL OF STRUCTURAL GEOLOGY
(2021)
Article
Geography, Physical
G. Tari, G. Bada, A. Beidinger, J. Csizmeg, M. Danisik, I Gjerazi, B. Grasemann, M. Kovac, D. Plasienka, M. Sujan, P. Szafian
Summary: This passage discusses the basement structure of the NW Pannonian Basin, as well as the interaction between Cretaceous and Neoalpine faults, exploring how the geometry of Alpine nappes influences extensional basins. It confirms different modes of interaction observed in the Hungarian sector and emphasizes the selective manner in which Neoalpine faults interact with abandoned thrust fault planes in the region.
GLOBAL AND PLANETARY CHANGE
(2021)
Article
Geosciences, Multidisciplinary
C. K. Morley, S. Jitmahantakul, C. von Hagke, J. Warren, F. Linares
Summary: This study describes an atypical detachment zone in Thailand occurring within a relatively strong Permian carbonate lithology, in contrast to classic detachment zones defined by weak lithologies. The key differences between stratigraphic members that led to the development of this detachment zone are bedding spacing and clay content.
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
Carlos Pena, Oliver Heidbach, Marcos Moreno, Daniel Melnick, Onno Oncken
Summary: This study evaluates the transfer of stresses from megathrust earthquakes to adjacent segments using a 3D forward model and GPS and seismic data. The results show CFS changes of about 0.06 bar induced by the 2010 Maule earthquake, with different impacts observed between linear and power-law rheology models on postseismic deformation and CFS changes.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geochemistry & Geophysics
Paraskevi Io Ioannidi, Laetitia Le Pourhiet, Philippe Agard, Samuel Angiboust, Onno Oncken
Summary: Inspired by natural melange outcrops, this study investigates the deformation processes and effective rheological parameters of two-phase medium comprising blocks embedded within a matrix. The results demonstrate that the ratio of blocks-in-matrix affects deformation and strain localization, providing insight into the behavior of heterogeneous subduction interfaces in large scale geodynamic models.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Green & Sustainable Science & Technology
Thomas Rinder, Christoph von Hagke
Summary: The study investigates the feasibility of using basalt-enhanced weathering for carbon sequestration on agricultural land. It finds that the effectiveness of this method is dependent on using particle sizes smaller than 10 μm. If implemented on a large scale with particles of this size, it could potentially remove about 2% of Austria's annual greenhouse gas emissions, but challenges such as the energy requirements for grinding and uncertainties in field weathering rates still need to be addressed through further research.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Geochemistry & Geophysics
Vasso Saltogianni, Vasiliki Mouslopoulou, Armin Dielforder, Gian Maria Bocchini, Jonathan Bedford, Onno Oncken
Summary: By combining various models and data, this study reveals the causal relationship between two slow slip events and the 2018 Zakynthos Earthquake in the Hellenic Subduction System. The events led to aseismic slip on the plate-interface and an increase in upper-plate seismicity, ultimately triggering the earthquake.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2021)
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
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
Geosciences, Multidisciplinary
Bob Bamberg, Christoph von Hagke, Simon Virgo, Janos L. Urai
Summary: The study found that brittle boudinage depends on the ratio of grain size and layer thickness of the amphibolite, with strain diffusing throughout thin layers and localizing once layer thickness exceeds a certain threshold. Different types of fractures develop in layers of varying thickness, with shear fractures forming in thicker layers and extensional fractures in thinner layers. Additionally, there is a trend of progressive embrittlement during cooling, leading to increasing fracture density and a switch from shear to extensional fracturing.
JOURNAL OF STRUCTURAL GEOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Christoph von Hagke, Chloe Hill, Angela Hof, Thomas Rinder, Andreas Lang, Jan Christian Habel
Summary: While both the COVID-19 crisis and the environmental crisis share similarities, they also exhibit significant differences. The linear correlation between problems and solutions in the COVID-19 crisis contrasts with the complexity and disconnected nature of challenges in the environmental crisis, making it more difficult for humans to perceive and address.
Article
Geosciences, Multidisciplinary
Valentina Argante, David Colin Tanner, Christian Brandes, Christoph von Hagke, Sumiko Tsukamoto
Summary: This study analyzed the microstructure of a fault gouge from a low-angle normal fault in the European Alps, revealing a multistage history of deformation from ductile to brittle. The predominant deformation mechanism in the fault gouge was viscous-frictional behavior at the brittle-ductile transition, likely facilitated by phyllosilicates and graphite lubrication.
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.
Article
Geography, Physical
Oystein T. Haug, Matthias Rosenau, Michael Rudolf, Karen Leever, Onno Oncken
Summary: Research shows that the run-out of rock avalanches is closely related to the degree of fragmentation, with basal friction acting as a limiting factor. A scaling law based on energy conservation reveals that the variation in fragmentation degree contributes to the large variation in run-out of rock avalanches observed in nature.
EARTH SURFACE DYNAMICS
(2021)
Article
Geography, Physical
Catherine Reid, John Begg, Vasiliki Mouslopoulou, Onno Oncken, Andrew Nicol, Sofia-Katerina Kufner
EARTH SURFACE DYNAMICS
(2020)
