Articles | Volume 13, issue 1
https://doi.org/10.5194/se-13-117-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/se-13-117-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
12 Jan 2022
Research article |
| 12 Jan 2022
| 12 Jan 2022
Forearc density structure of the overriding plate in the northern area of the giant 1960 Valdivia earthquake
Andrei Maksymowicz
CORRESPONDING AUTHOR
Departamento de Geofísica, Universidad de Chile, Blanco Encalada
2002, Santiago, Chile
Daniela Montecinos-Cuadros
Departamento de Geofísica, Universidad de Chile, Blanco Encalada
2002, Santiago, Chile
Daniel Díaz
Departamento de Geofísica, Universidad de Chile, Blanco Encalada
2002, Santiago, Chile
María José Segovia
Departamento de Geofísica, Universidad de Chile, Blanco Encalada
2002, Santiago, Chile
Tomás Reyes
Departamento de Geología, Universidad de Chile, Plaza
Ercilla 803, Santiago, Chile
Instituto de Geocronología y Geología Isotopica
(INGEIS-CONICET), Universidad de Buenos Aires (UBA), Buenos Aires, Argentina
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F. Martínez, A. Maksymowicz, H. Ochoa, and D. Díaz
Solid Earth, 6, 1259–1276, https://doi.org/10.5194/se-6-1259-2015, https://doi.org/10.5194/se-6-1259-2015, 2015
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This paper discusses an integrated approach that provides new ideas about the structure of the eastern Coastal Cordillera in the western Central Andes of northern Chile (27º–28ºS). The integration of gravity and geological information shows that the architecture of this sector is related to the inversion of a Cretaceous rift system. Ages of the synorogenic deposits exposed unconformably over the inversion structure have confirmed a Late Cretaceous age for the Andean deformation in the region.
D. Díaz, A. Maksymowicz, G. Vargas, E. Vera, E. Contreras-Reyes, and S. Rebolledo
Solid Earth, 5, 837–849, https://doi.org/10.5194/se-5-837-2014, https://doi.org/10.5194/se-5-837-2014, 2014
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Subject area: Tectonic plate interactions, magma genesis, and lithosphere deformation at all scales | Editorial team: Seismics, seismology, paleoseismology, geoelectrics, and electromagnetics | Discipline: Geophysics
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Impact of Timanian thrust systems on the late Neoproterozoic–Phanerozoic tectonic evolution of the Barents Sea and Svalbard
Early Cenozoic Eurekan strain partitioning and decoupling in central Spitsbergen, Svalbard
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A Python framework for efficient use of pre-computed Green's functions in seismological and other physical forward and inverse source problems
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Structural expression of a fading rift front: a case study from the Oligo-Miocene Irbid rift of northwest Arabia
Structure of the central Sumatran subduction zone revealed by local earthquake travel-time tomography using an amphibious network
Srishti Singh and Radheshyam Yadav
Solid Earth, 14, 937–959, https://doi.org/10.5194/se-14-937-2023, https://doi.org/10.5194/se-14-937-2023, 2023
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We use numerical models to study the stresses arising from gravitational potential energy (GPE) variations and shear tractions associated with mantle convection in the Zagros–Iran region. The joint models predicted consistent deviatoric stresses that can explain most of the deformation indicators. Stresses associated with mantle convection are found to be higher than those from GPE, thus indicating the deformation in this region may primarily be caused by the mantle, except in eastern Iran.
Yueyang Xia, Dirk Klaeschen, Heidrun Kopp, and Michael Schnabel
Solid Earth, 13, 367–392, https://doi.org/10.5194/se-13-367-2022, https://doi.org/10.5194/se-13-367-2022, 2022
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Geological interpretations based on seismic depth images depend on an accurate subsurface velocity model. Reflection tomography is one method to iteratively update a velocity model based on depth error analysis. We used a warping method to estimate closely spaced data-driven depth error displacement fields. The application to a multichannel seismic line across the Sunda subduction zone illustrates the approach which leads to more accurate images of complex geological structures.
Jean-Baptiste P. Koehl, Craig Magee, and Ingrid M. Anell
Solid Earth, 13, 85–115, https://doi.org/10.5194/se-13-85-2022, https://doi.org/10.5194/se-13-85-2022, 2022
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The present study shows evidence of fault systems (large cracks in the Earth's crust) hundreds to thousands of kilometers long and several kilometers thick extending from northwestern Russia to the northern Norwegian Barents Sea and the Svalbard Archipelago using seismic, magnetic, and gravimetric data. The study suggests that the crust in Svalbard and the Barents Sea was already attached to Norway and Russia at ca. 650–550 Ma, thus challenging existing models.
Jean-Baptiste P. Koehl
Solid Earth, 12, 1025–1049, https://doi.org/10.5194/se-12-1025-2021, https://doi.org/10.5194/se-12-1025-2021, 2021
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By using seismic data and fieldwork, this contribution shows that soft, coal-rich sedimentary rocks absorbed most of early Cenozoic, Eurekan, contractional deformation in central Spitsbergen, thus suggesting that no contractional deformation event is needed in the Late Devonian to explain the deformation differences among late Paleozoic sedimentary rocks. It also shows that the Billefjorden Fault Zone, a major crack in the Earth's crust in Svalbard, is probably segmented.
Christian Emile Nyaban, Théophile Ndougsa-Mbarga, Marcelin Bikoro-Bi-Alou, Stella Amina Manekeng Tadjouteu, and Stephane Patrick Assembe
Solid Earth, 12, 785–800, https://doi.org/10.5194/se-12-785-2021, https://doi.org/10.5194/se-12-785-2021, 2021
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A multi-scale analysis of aeromagnetic data combining tilt derivative, Euler deconvolution, upward continuation, and 2.75D modelling was applied over Cameroon between the latitudes 5°30'–6° N and the longitudes 13°30'–14°45' E. Major families of faults oriented ENE–WSW, E–W, NW–SE, and N–S with a NE–SW prevalence were mapped. Depths of interpreted faults range from 1000 to 3400 m, mylonitic veins were identified, and 2.75D modelling revealed fault depths greater than 1200 m.
Laura Petrescu, Silvia Pondrelli, Simone Salimbeni, Manuele Faccenda, and the AlpArray Working Group
Solid Earth, 11, 1275–1290, https://doi.org/10.5194/se-11-1275-2020, https://doi.org/10.5194/se-11-1275-2020, 2020
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To place constraints on the mantle deformation beneath the Central Alps and the greater Alpine region, we analysed the appropriate seismic signal recorded by more than 100 stations, belonging to AlpArray and to other permanent networks. We took a picture of the imprinting that Alpine orogen history and related subductions left at depth, with a mainly orogen-parallel mantle deformation from Western Alps to Eastern Alps, but also N to S from the Po Plain to the Rhine Graben.
Sebastian Heimann, Hannes Vasyura-Bathke, Henriette Sudhaus, Marius Paul Isken, Marius Kriegerowski, Andreas Steinberg, and Torsten Dahm
Solid Earth, 10, 1921–1935, https://doi.org/10.5194/se-10-1921-2019, https://doi.org/10.5194/se-10-1921-2019, 2019
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We present an open-source software framework for fast and flexible forward modelling of seismic and acoustic wave phenomena and elastic deformation. It supports a wide range of applications across volcanology, seismology, and geodesy to study earthquakes, volcanic processes, landslides, explosions, mine collapses, ground shaking, and aseismic faulting. The framework stimulates reproducible research and open science through the exchange of pre-calculated Green's functions on an open platform.
Simón Lissa, Nicolás D. Barbosa, J. Germán Rubino, and Beatriz Quintal
Solid Earth, 10, 1321–1336, https://doi.org/10.5194/se-10-1321-2019, https://doi.org/10.5194/se-10-1321-2019, 2019
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We quantify the effects that 3-D fractures with realistic distributions of aperture have on seismic wave attenuation and velocity dispersion. Attenuation and dispersion are caused by fluid pressure diffusion between the fractures and the porous background. We show that (i) both an increase in the density of contact areas and a decrease in their correlation length reduce attenuation and (ii) a simple planar fracture can be used to emulate the seismic response of realistic fracture models.
Reli Wald, Amit Segev, Zvi Ben-Avraham, and Uri Schattner
Solid Earth, 10, 225–250, https://doi.org/10.5194/se-10-225-2019, https://doi.org/10.5194/se-10-225-2019, 2019
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Plate-scale rifting is frequently expressed by the subsidence of structural basins along an axis, but postdating tectonic and magmatic activity mostly obscures them. A 3-D subsurface imaging and facies analysis down to 1 km reveals uniquely preserved Galilean basins subsiding along a failing rift front in two main stages. Rifting within a large releasing jog (20–9 Ma), followed by localized grabenization off the Dead Sea fault plate boundary (9–5 Ma), prevents them from dying out peacefully.
Dietrich Lange, Frederik Tilmann, Tim Henstock, Andreas Rietbrock, Danny Natawidjaja, and Heidrun Kopp
Solid Earth, 9, 1035–1049, https://doi.org/10.5194/se-9-1035-2018, https://doi.org/10.5194/se-9-1035-2018, 2018
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Short summary
This work analyses the density structure of the continental forearc in the northern segment of the 1960 Mw 9.6 Valdivia earthquake. Results show a segmentation of the continental wedge along and perpendicular to the margin. The extension of the less rigid basement units conforming the marine wedge and Coastal Cordillera domain could modify the process of stress loading during the interseismic periods. This analysis highlights the role of the overriding plate on the seismotectonic process.
This work analyses the density structure of the continental forearc in the northern segment of...
