Article
Geochemistry & Geophysics
Ben S. Knight, J. Huw Davies, Fabio A. Capitanio
Summary: This study investigates the early stages of subduction using a numerical model, revealing the relationships between physical processes and parameters in the subduction zone, providing a detailed understanding of subduction processes.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geosciences, Multidisciplinary
Jianke Fan, Hong Zheng, Dapeng Zhao, Dongdong Dong, Yongliang Bai, Cuilin Li, Zhengyi Zhang
Summary: The collision between oceanic plateaus and trenches has had a significant impact on the growth of continents and reorganization of plate tectonics throughout Earth's history. However, the understanding of the collision between an initially rifted plateau and a trench is still lacking. In this study, seismic tomography and receiver function analyses were conducted in the Yap subduction zone, providing insights into the interaction between the initially rifted Caroline Plateau and the Yap Trench. The results suggest the presence of different slab patterns that may explain the unique tectonic features in the Yap subduction zone.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geochemistry & Geophysics
Zhiyong Yan, Lin Chen, Xiong Xiong, Bo Wan, Houze Xu
Summary: Research shows that oceanic plateaus play a key role in subduction zone reorganization, with different sizes and compositions leading to different subduction styles, including steep subduction, breakoff of subducting slab followed by flat-slab subduction, and subduction zone jump. These geodynamic results reveal the tectonic force switch in the overriding lithosphere during subduction zone reorganization, helping identify past subduction zone changes.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geosciences, Multidisciplinary
Hwaju Lee, Younghee Kim, Maximiliano J. Bezada, Robert W. Clayton
Summary: This study compares the subduction of two ridges on the Nazca Plate and concludes that subslab mantle buoyancy has a larger impact on the subduction angle than the crustal material of the ridge.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Yanhui Suo, Sanzhong Li, Xianzhi Cao, Yiming Liu, Junjiang Zhu, Xiyao Li, Ian Somerville
Summary: The study reveals the presence of a series of ancient Tethys ocean basins beneath the Indian Ocean, as well as suspected Gondwana fragments. These plate tectonics have complex effects on the shallow crust and deep mantle structure, making it challenging to reconstruct East Gondwana and discuss geodynamics in the Tethyan Realm. The research also identifies signs of lithospheric or crustal thinning as a tracer of subducted plates.
EARTH-SCIENCE REVIEWS
(2021)
Article
Multidisciplinary Sciences
Bingfeng Zhang, Xuewei Bao, Yingkai Wu, Yixian Xu, Wencai Yang
Summary: Syncontractional extension in present-day Tibet is linked to the underthrusting Indian plate, which exerts strong north-directed shearing and enables the extension in southern Tibet. Seismic anisotropy measurements reveal the convergence-parallel alignment of anisotropic fabrics in the deep crust of the southern Tibetan rifts, shedding light on the cause of syncontractional extension in the region.
NATURE COMMUNICATIONS
(2023)
Article
Geochemistry & Geophysics
Hengchu Peng, Jose Badal, Jiafu Hu, Haiyan Yang, Benyu Liu
Summary: The study of the Tengchong volcanic field reveals a significant low-velocity anomaly in the crust, potentially related to the shear wave velocity in the upper mantle of neighboring regions. Analysis of P receiver functions also provides insights into crustal thickness, V-P/N-S ratios, and the depth range of the lithosphere-asthenosphere boundary.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Environmental Sciences
Marco Meschis, Giordano Teza, Enrico Serpelloni, Letizia Elia, Giovanni Lattanzi, Miriana Di Donato, Silvia Castellaro
Summary: In this study, we investigated crustal deformation in the upper plate of the Ionian Subduction Zone (ISZ) through geodetic measurements and analysis of tectonically deformed marine terraces. The results suggest that crustal extension in this region is primarily accommodated by several normal faults. Furthermore, the study found that uplift rates and fault throw rates in the area may have been relatively stable over time.
Article
Geosciences, Multidisciplinary
Erin Heilman, Thorsten W. Becker
Summary: Mantle plumes can play a significant role in the evolution of Earth and plate tectonics, potentially causing the termination of subduction zones and contributing to the complexity of mantle structures. This effect may be particularly relevant for the early Earth and remain relevant in modern times.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Review
Geosciences, Multidisciplinary
Seyed Tohid Nabavi, Haakon Fossen
Summary: The research on folds and folding is based on detailed geometrical analysis, and their relationships with structures such as fractures are significant for understanding stress, strain, kinematics, mechanics, and tectonic processes. The distinction between passive and active folding is important, with passive folding being easier to model and understand compared to active folding. Future research should focus on experimental and numerical modeling of active folds to further enhance our understanding of complex fold geometries observed in rocks.
EARTH-SCIENCE REVIEWS
(2021)
Article
Geochemistry & Geophysics
Mingye Feng, Ling Chen, Shengji Wei, Xin Wang, Xu Wang, Zimu Wu
Summary: Researchers developed a new method called Dip Direction Searching (DDS) to estimate the dip direction of slabs more accurately. The method was used in the Sumatran subduction zone and provided important insights into the thickness and dip direction of the slabs in that area.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Environmental Sciences
Yang Wang, Lifei Zhang, Zhong-Hai Li
Summary: The study reveals that the mass deficit of felsic crust in the India-Asia collisional system is significant, leading to long-duration fast convergence and crustal imbalance. Through simulations and calculations, it is found that the felsic crust is denser than the mantle at certain pressures, giving it negative buoyancy and facilitating spontaneous subduction.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)
Article
Geochemistry & Geophysics
C. Weidle, L. Wiesenberg, A. Scharf, P. Agard, A. El-Sharkawy, F. Krueger, T. Meier
Summary: The geodynamic evolution of Eastern Arabia consists of three main events: Pan-African plate assembly, Infracambrian and Ordovician extension, and Permian Pangean breakup and rifting. The obduction of the Semail Ophiolite during the Late Cretaceous and the subsequent relaxation of the lithosphere are also significant. Seismological observations reveal the lithospheric thickness and crustal heterogeneity of Eastern Arabia, indicating the segmentation of the crust and the impact of various tectonic events. The configuration of the lithosphere in northeastern Arabia preserves imprints from multiple geological periods.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geology
Vuong V. Mai, Jun Korenaga
Summary: Recent studies suggest that early Earth may have been a water world with few exposed continents. Unlike modern Earth, the thickness of early Earth's continents may have been controlled by the strength of the continental crust.
Article
Geochemistry & Geophysics
Jianfeng Yang, Liang Zhao, Yang Li
Summary: Fluids associated with subducting slabs play a crucial role in regulating water discharge, arc magmatism, and intermediate-depth earthquakes. This study presents high-resolution numerical models that show the impact of plastic weakening and friction coefficient on fault patterns, while plate age and elasticity have minimal influence. Brittle bending faults facilitate seawater infiltrating into subducting slabs, explaining sporadic lower plane earthquakes.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Geochemistry & Geophysics
Muriel Gerbault, Julie Schneider, A. Reverso-Peila, Michel Corsini
Article
Geochemistry & Geophysics
Muriel Gerbault, Riad Hassani, Camila Novoa Lizama, Alban Souche
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2018)
Article
Geochemistry & Geophysics
O. Vanderhaeghe, S. C. Kruckenberg, M. Gerbault, L. Martin, S. Duchene, E. Delonle
Article
Geochemistry & Geophysics
A. Soltanmohammadi, M. Gregoire, M. Rabinowicz, M. Gerbault, G. Ceuleneer, M. Rahgoshay, M. Bystricky, M. Benoit
JOURNAL OF PETROLOGY
(2018)
Article
Geochemistry & Geophysics
C. Novoa, D. Remy, M. Gerbault, J. C. Baez, A. Tassara, L. Cordova, C. Cardona, M. Granger, S. Bonvalot, F. Delgado
EARTH AND PLANETARY SCIENCE LETTERS
(2019)
Article
Geochemistry & Geophysics
Arthur Bauville, Mikito Furuichi, Muriel Gerbault
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2020)
Article
Geochemistry & Geophysics
Aurelie Louis-Napoleon, Muriel Gerbault, Thomas Bonometti, Cedric Thieulot, Roland Martin, Olivier Vanderhaeghe
GEOPHYSICAL JOURNAL INTERNATIONAL
(2020)
Article
Geosciences, Multidisciplinary
Javiera Ruz, John Browning, Jose Cembrano, Pablo Iturrieta, Muriel Gerbault, Gerd Sielfeld
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2020)
Article
Geochemistry & Geophysics
Aurelie Louis-Napoleon, Thomas Bonometti, Muriel Gerbault, Roland Martin, Olivier Vanderhaeghe
Summary: We numerically investigate the development of crustal scale diapirism and convection in a heterogeneous continental crust, independently from regional tectonics. The study focuses on a hot crust with unmolten and partially molten domains, using the volume of fluid method to capture the behavior of deformable inclusions. Different flow regimes are observed, ranging from suspension to layering and diapiric regimes, depending on the properties of the unmolten and partially molten rock. These findings provide insights into the physical parameters required for the segregation of deformable inclusions in a partially molten crust and contribute to the understanding of continental crust differentiation.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geosciences, Multidisciplinary
Javiera Ruz Ginouves, Muriel Gerbault, Jose Cembrano, Pablo Iturrieta, Felipe Saez Leiva, Camila Novoa, Riad Hassani
Summary: The Southern Andes margin contains active and fossil volcanic, geothermal, and mineralized systems that demonstrate intense geofluid migration through the crust, associated with crustal faults that accommodate bulk deformation from oblique plate convergence. 3D numerical models of a magmatic reservoir and a fault zone were presented to investigate elastic-plastic deformation and stress patterns in the intermediate bedrock space, showing potential for brittle failure triggered by strike-slip displacement or magmatic overpressure. The results suggest that repeated crustal fault displacement may favor fluid pathways upwards, rather than a single seismic event, and that shallow reservoirs must be close to fault zones to reactivate them and promote fluid pathways to the surface.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2021)
Article
Geochemistry & Geophysics
C. Novoa, M. Gerbault, D. Remy, J. Cembrano, L. E. Lara, J. Ruz-Ginouves, A. Tassara, J. C. Baez, R. Hassani, S. Bonvalot, R. Contreras-Arratia
Summary: This study uses synthetic aperture radar (SAR) imagery to analyze the ground displacements before, during, and after the 2011-2012 Cordon-Caulle eruption in Chile. The researchers find that a similar prolate spheroidal source explains the ground deformation for the pre-eruptive and post-eruptive periods. They also use 3D numerical elasto-plastic models to assess the failure conditions resulting from pre-eruptive magma injection. The study suggests that the eruption may have been triggered by slip motion along a fault system or collapse of the caldera.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Muriel Gerbault, Fabrice J. Fontaine, Aline Peltier, Jean-Luc Got, Riad Hassani, Valerie Ferrazzini, Lydie Gailler, Zacharie Duputel
Summary: This study models the elasto-plastic behavior of the Piton de la Fournaise volcanic edifice and suggests that seismic activity and gravity-induced flank instability may be linked to magma injections. The study also indicates that the plastic behavior of the volcanic edifice is influenced by continuous magma supply from a reservoir, rather than pre-existing weak zones.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2022)
Article
Geochemistry & Geophysics
Felipe Saez-Leiva, Daniel E. Hurtado, Muriel Gerbault, Javiera Ruz-Ginouves, Pablo Iturrieta, Jose Cembrano
Summary: In this study, a finite element method is used to simulate the control of crustal faults on nearby geothermal reservoirs. The results show that fault slip leads to changes in fluid pressure domains, which in turn affect the migration of reservoir fluids. These fluid pressure changes are achieved through variations in fault permeability and fluid viscosity. The study also finds that pressure-driven diffusion of fluids causes fluid flow to return to a stationary state over time. Therefore, solid-fluid coupling needs to be considered in numerical models for volcano-tectonic studies.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geochemistry & Geophysics
Aurelie Louis-Napoleon, Muriel Gerbault, Thomas Bonometti, Olivier Vanderhaeghe, Roland Martin, Nathan Maury
Summary: This study investigates the specific conditions for the formation and preservation of domes resulting from diapirism at the top of convective cells. The results show that the cessation of basal heating and the freezing of the buoyant inclusions density favor their stacking and preservation. These domes record several convective cycles.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Geochemistry & Geophysics
Muriel Gerbault, Fabrice J. Fontaine, Michel Rabinowicz, Misha Bystricky
EARTH AND PLANETARY SCIENCE LETTERS
(2017)