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High-resolution velocity and strain rate fields in the Kumaun Himalaya: An implication for seismic moment budget J. Geodyn. (IF 2.3) Pub Date : 2024-03-08 Himanshu Verma, Sumanta Pasari, Yogendra Sharma, Kuo-En Ching
The collision between Indian and Eurasian tectonic plates results in a series of earthquakes, releasing stored elastic strain accumulated over a long period. This research utilizes 22 new and 26 previously published GPS velocities along with nine years of InSAR observations to estimate high-resolution velocity and strain rate fields across the Kumaun Himalaya. The resulting high-resolution velocity
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Understanding the crustal architecture beneath the Bangui magnetic anomaly and its interactions with central African tectonic megastructures based gravity and magnetic analysis J. Geodyn. (IF 2.3) Pub Date : 2024-03-02 Cyrille Donald Njiteu Tchoukeu, Yvette Poudjom Djomani, Kevin Mickus, Sonia Rousse, Mohamed Sobh, Charles Basseka, Jacques Etame
The Bangui magnetic anomaly (BMA) in Central Africa is one of the largest continental magnetic anomalies on Earth in terms of amplitude and lateral size. Determining the sources of the BMA can lead to an increased understanding of the crustal dynamic in the Central African sub-region and the African continent as a whole. Magnetic and gravity analysis-based derivative, two-dimensional forward modelling
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Strong earthquakes and tsunami potential in the Hellenic Subduction Zone J. Geodyn. (IF 2.3) Pub Date : 2024-02-20 Ioanna Triantafyllou, Apostolos Agalos, Achilleas G. Samaras, Theophanis V. Karambas, Gerassimos A. Papadopoulos
The tsunamigenic potential of an earthquake depends on its size, source depth and focal mechanism. The Hellenic Subduction Zone (HSZ) has been selected in the paper to study this important issue. The HSZ was ruptured by 11 strong (M6.0) earthquakes in the time period 2009–2023. One earthquake ruptured onshore but only three out of ten offshore earthquakes produced tsunamis: 1 July 2009 (M6.4), 25 October
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Extensional tectonics of the Indian passive continental margin in the Middle and Late Jurassic: Constraints from detrital zircon ages in the eastern Tethyan Himalaya J. Geodyn. (IF 2.3) Pub Date : 2024-01-30 Shuchen Jin, Yabo Tong, Xinxin Sun, Zijian Zhang, Junling Pei, Lifu Hou, Zhenyu Yang
Knowledge the initial extension in the Indian continent during the Jurassic is important for understanding the dynamics of its breakup from Eastern Gondwana. The absence of Jurassic magmatic activity in the eastern Tethyan Himalaya hinders the understanding of this process. We report a provenance and tectonic setting study on the Middle Jurassic Zhela and Late Jurassic Weimei Formations sandstone in
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Location and polarity of Variscan sutures based on petrological and seismological data from the Bohemian Massif and the implications for the European Variscides J. Geodyn. (IF 2.3) Pub Date : 2024-01-24 S.W. Faryad, S. Mazur, J. Plomerová
The high- to ultrahigh-pressure ((U)HP) metamorphic rocks are present within the European Variscan belt between the Bohemian and Iberian massifs (the Galicia-Moldanubian zone) and they are partly incorporated into the Alpine orogenic system. Due to their involvement in various allochthonous units, the affiliation of the (U)HP rocks to the suture zones that were the sites of their initial exhumation
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SItomo – A toolbox for splitting intensity tomography and application in the Eastern Alps J. Geodyn. (IF 2.3) Pub Date : 2024-01-19 Frederik Link, Maureen D. Long
The tomographic inversion of shear wave splitting data for upper mantle anisotropy has been a longstanding challenge. This is due to the ray-based approximation of classical approaches and the near-vertical incidence of the core-mantle converted phases such as SKS that are often used. Recent developments include the calculation of finite-frequency sensitivity kernels for SKS splitting intensity observations
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Crustal stress pattern at Mt. Etna volcano J. Geodyn. (IF 2.3) Pub Date : 2023-12-28 Salvatore Scudero
Stress fields may exhibit variegated patterns, especially in volcanic areas where several processes superimpose their effects in space and time. The comprehension of such patterns may not be straightforward to investigate. This work investigates the pattern of the crustal stress in the area of Mt. Etna Volcano (Sicily, Italy). This has been possible through a collection of more than 800 stress indicators
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Variations of the effective elastic thickness evidence for a wide diffusive boundary between the North American and Eurasian plates in Siberia J. Geodyn. (IF 2.3) Pub Date : 2023-12-22 M.K. Kaban, B. Chen, R.V. Sidorov, A.G. Petrunin
Northeastern Eurasia is one of the least explored regions in the world. Very little geophysical data is available for this inaccessible area. Even the exact location of the plate boundary between Eurasia and North America remains a subject of ongoing debate. The effective elastic thickness (EET) of the lithosphere is a proxy for lithospheric strength and can provide insight into the thermal regime
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Formation mechanism of carbonaceous materials in fault gouge of Wenchuan earthquake J. Geodyn. (IF 2.3) Pub Date : 2023-12-22 Deyang Shi, Yaowei Liu, Jin Shi
Carbonaceous materials are widely present in the seismic fault zone. They play a crucial role in lubricating the fault slipping. To date, the formation mechanism of carbonaceous materials is still unclear. In this work, we have conducted a carbon dioxide hydrogenation reaction experiment in a homemade high temperature reactor for the purpose to insight the formation mechanism of carbonaceous materials
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Anisotropic structure in the mantle wedge beneath southeastern Mexico from shear-wave splitting tomography J. Geodyn. (IF 2.3) Pub Date : 2023-12-02 Samuel Celis, Raúl W. Valenzuela, Marco Calò, Xyoli Pérez-Campos, Gerardo León Soto
Cocos intraslab earthquakes were used to make a 3-D tomographic inversion to define a crystallographic orientation model for the mantle wedge beneath southeastern Mexico. This model provided insights regarding the pattern of the mantle wedge flow and its relationship to the geometry of the subducting slab. The mantle wedge was parametrized as a 3-D block model of crystallographic orientations assuming
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Orogen-parallel discontinuity of the Apennines subduction zone in Southern Italy as seen from mantle wedge seismic structure J. Geodyn. (IF 2.3) Pub Date : 2023-11-28 Nicola Piana Agostinetti
We investigate the seismic structure of the mantle wedge of the Apennines subduction zone (Central Mediterranean) using teleseismic receiver function (RF). We inverted RF for both isotropic and anisotropic properties of the mantle wedge, from below the overriding Moho to the “plate boundary”, i.e. the interface that separate the slab from the mantle wedge. Given the distribution of the seismic network
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Variation in olivine crystal-fabrics and their seismic anisotropies in the Horoman peridotite complex, Hokkaido, Japan J. Geodyn. (IF 2.3) Pub Date : 2023-11-26 Kazuki Matsuyama, Katsuyoshi Michibayashi
We examined the microstructures and crystal-fabrics of peridotites within a large area (6 ×5 km) of the Horoman peridotite pomplex in the Hidaka metamorphic belt of Hokkaido, Japan. Thirteen peridotite samples were analyzed for olivine and orthopyroxene grain sizes, fabric strength (J-index), and crystallographic preferred orientations (CPOs). Mean grain sizes of olivine and orthopyroxene were ranged
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Revisiting the geodynamics of the Middle East region from an integrated geophysical perspective J. Geodyn. (IF 2.3) Pub Date : 2023-11-24 Chiara Civiero, Nicolas L. Celli, Magdala Tesauro
A long-standing question in geodynamics is whether mantle flow is driven by the plate motion alone, or mantle upwelling makes a significant contribution to it. Subducting slabs and lateral variations of the continental lithosphere can further influence the asthenospheric flow and control its direction. The Middle East region (MER) is a complex continental setting where different processes such as rifting
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On constraining 3D seismic anisotropy in subduction, mid-ocean-ridge, and plume environments with teleseismic body wave data J. Geodyn. (IF 2.3) Pub Date : 2023-10-20 Manuele Faccenda, Brandon P. VanderBeek
Conventional seismic tomography studies consider the Earth’s interior as mechanically isotropic, despite seismic anisotropy being widely observed. This current standard approach to seismic imaging is likely to lead to significant artefacts in tomographic images with first-order effects on interpretations and hinders the quantitative integration of seismology with geodynamic flow models. Although a
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Velocity anisotropy measured on the spherical specimens: History and applications J. Geodyn. (IF 2.3) Pub Date : 2023-10-13 M. Petružálek, T. Lokajíček, R. Přikryl, V. Vavryčuk
The anisotropy of elastic properties, including seismic velocities, has already been investigated in the lab over past seven decades. Here, we present a review related to the development of a unique apparatus for the detailed measurement of seismic velocity anisotropy. Its originality lies in measuring velocities on spherical specimens, which allows for determination of the velocity anisotropy as a
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Editorial – Geological and tectonic evolution of the Arctic J. Geodyn. (IF 2.3) Pub Date : 2023-09-26 Morten Smelror, Oleg V. Petrov
Abstract not available
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Late Paleozoic-Jurassic tectonic evolution of the eastern Deseado Massif in central-southern Patagonia J. Geodyn. (IF 2.3) Pub Date : 2023-09-20 C. Navarrete, J. Bastías-Silva, G. Gianni, G. Jalfin, G. Guerra, M. Hurley, D. Chew, J.M. Turra, M. Ocampo, M.B. Lastra, N. Herbst, M. Iglesias, M. Perez Frasette, F. Drakou
Previous tectonic studies have indicated that the peri-cratonic lithosphere, located away from continental margins, is sensitive to far-field stresses propagating from active plate margins, which induce variable deformation. In order to gain a better understanding of potential intraplate tectonic events associated with the geodynamic evolution of the active margin of southwestern Gondwana, we conducted
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Lithospheric mantle dynamics in Central and East Java Region, Indonesia from local shear wave splitting measurements J. Geodyn. (IF 2.3) Pub Date : 2023-09-20 Faiz Muttaqy, Syuhada Syuhada, Andri Dian Nugraha, James Mori, Nanang Tyasbudi Puspito, Pepen Supendi, Supriyanto Rohadi
We have investigated the local shear wave splitting of 30–300 km depth earthquakes from 38 BMKG stations between 2009 and 2020 to determine upper mantle dynamics beneath the Central and East Java (CEJ) region, Indonesia. A total of 2338 measurements is obtained and divided the analysis into two focal depths, i.e., shallow (≤ 100 km) and deep (100 – 300 km) events. (1) Both individual station measurements
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Ransiki earthquakes, northeastern Bird’s Head Peninsula, northwestern New Guinea, Indonesia: Deformation partitioning in oblique plate convergence J. Geodyn. (IF 2.3) Pub Date : 2023-09-23 Sukahar Eka Adi Saputra, Christopher L. Fergusson, Colin V. Murray-Wallace
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3-D velocity distribution of amphibolites collected from various crustal depths J. Geodyn. (IF 2.3) Pub Date : 2023-09-21 T. Lokajíček, R. Přikryl, A. Aminzadeh, T. Svitek, M. Petružálek
The elastic properties of nineteen samples of crystalline rocks – amphibolites from different areas/boreholes were studied in order to elucidate possible depth effect on the elastic properties of these mineralogically relatively homogenous rocks. The samples were taken from three different crustal levels – shallow (tens of meters) Stařechov (Czech Republic), medium (first thousands of meters) KTB (Germany)
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The 2021 Mw 7.2 Haiti earthquake: Blind thrust rupture revealed by space geodetic observations and Bayesian estimation J. Geodyn. (IF 2.3) Pub Date : 2023-09-15 Hidayat Panuntun
On 14 August 2021, a large earthquake struck the southern region of Haiti. The epicenter of this earthquake is located relatively close to the Enriquillo–Plantain Garden Fault (EPGF) zone, a major active fault with a strike-slip mechanism in the southern part of Hispaniola. Since the epicenter of this earthquake is located relatively close to the Enriquillo–Plantain Garden Fault zone, one might think
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Anisotropic gradients in Iran: Quasi-Love waves illuminate the deep structure and deformation style of the Zagros, Alborz, and Kopet Dagh J. Geodyn. (IF 2.3) Pub Date : 2023-08-17 Amir Sadeghi-Bagherabadi, Lucia Margheriti, Abdelkrim Aoudia, Paola Baccheschi, Francesco Pio Lucente, Farhad Sobouti
We investigate the presence of the quasi-Love wave (qL) at 51 seismic stations of a temporary seismic network across the western Arabia-Eurasia collision zone. We quantify the intensity of the qL observations from the April 12, 2014 Solomon Islands earthquake by calculating the peak-to-peak amplitude ratios of the qL and Love waves, and compare them with predicted qL intensities from previous shear-wave
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Gravimetric inversion and three-dimensional geological modelling of the Piquiri Syenite Massif, southern Brazil J. Geodyn. (IF 2.3) Pub Date : 2023-08-16 Victor Soares Cardoso, Maria de Fátima Bitencourt, Jairo Francisco Savian, Robson dos Santos Aquino, Cristiane Butori Rivera
The Pelotas Batholith corresponds to the eastern margin of the Dom Feliciano Belt in southernmost Brazil. It comprises multiple intrusions formed by successive tectonic-magmatic processes during the Brasiliano / Pan-African Cycle. One of these intrusive igneous bodies is the Piquiri Syenite Massif (PSM), recently described as a multi-intrusive body formed by three successive pulses, dated by LA-MC-ICP-MS
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Geodetic/gravimetric evidence for mass loss in the subsidence area of Bandung, Indonesia J. Geodyn. (IF 2.3) Pub Date : 2023-07-10 Brian Bramanto, Kristian Breili, Christian Gerlach, Irwan Gumilar, Vegard Ophaug, Eko Januari Wahyudi
Land subsidence monitoring in Bandung, Indonesia, was initiated in the 2000 s. However, the monitoring has been limited to geometric observations only, which may restrict the further physical interpretation of the cause of the subsidence. In this study, we combine geometric and gravity observation methods to monitor surface subsidence in Bandung. 63 Synthetic Aperture Radar (SAR) images from Sentinel-1A
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Slab tear and rotation imaged with core-refracted shear wave anisotropy J. Geodyn. (IF 2.3) Pub Date : 2023-06-17 Laura Petrescu, Andrei Mihai, Felix Borleanu
We investigate the complex flow field around the Vrancea slab in Romania, a steeply sinking seismogenic lithospheric block that experienced lateral tear-off and possible rotation. The Vrancea slab is located beneath the South-East Carpathians and generates frequent seismicity despite its remote location from active collisional boundaries. We analyse core-refracted shear wave (SKS) splitting recorded
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High-pressure – Low-temperature metamorphic rocks of Iran and their geodynamic significance: A review J. Geodyn. (IF 2.3) Pub Date : 2023-06-08 Mirmohammad Miri, Ali A. Sepahi
High-pressure-low-temperature (HP-LT) rocks such as eclogites and blueschists preserve valuable information about the history and geodynamics of subduction zones. HP-LT rocks exposed in Iran formed during subduction of Paleo-Tethys and Neo-Tethys oceanic lithosphere beneath the Iran microplate and were subsequently exhumed from the Permian to the Early Eocene. The Shanderman and Anarak complexes are
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Lattice-preferred orientation (LPO) of olivine and amphibole in amphibole peridotites and neighboring hornblendites from Gapyeong, South Korea and implications for seismic anisotropy J. Geodyn. (IF 2.3) Pub Date : 2023-05-26 Jaeseok Lee, Haemyeong Jung
Amphibole peridotites and neighboring hornblendites are often found in subduction zones. To understand the effect of amphibole-rich rocks on seismic anisotropy in subduction zones, we studied the lattice-preferred orientation (LPO) of olivine and amphibole in amphibole peridotites and neighboring hornblendites in Gapyeong, South Korea. The major minerals of amphibole peridotites were olivine (31–51%
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Remote sensing data applied to the reconstruction of volcanic activity in the Valley of the Volcanoes, Central Volcanic Zone, Peru J. Geodyn. (IF 2.3) Pub Date : 2023-05-23 Andrzej Gałaś, Paulina Lewińska, Rigoberto Aguilar, Łukasz Nowak
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A personal tribute to Vladislav Babuška J. Geodyn. (IF 2.3) Pub Date : 2023-05-18 Robert Cooper Liebermann
For the past half century, I have been fortunate in maintaining collaborations with Czech scientists in the Czech Republic (formerly Czechoslovakia) from the Geofyzikálníústav-GFU (Institute of Geophysics) of the Československá Akademie Věd-ČSAV (Czechoslovak Academy of Sciences). These collaborations have included my exchange visits to Prague (Praha) and convening international workshops in 1976,
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Seismic anisotropy and geodynamics of the East Japan subduction zone J. Geodyn. (IF 2.3) Pub Date : 2023-05-18 Dapeng Zhao, Jian Wang, Zhouchuan Huang, Xin Liu, Zewei Wang
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Early postseismic deformation of the 2018 Lombok, Indonesia, earthquake sequence constrained by GPS data J. Geodyn. (IF 2.3) Pub Date : 2023-05-18 Risya Fauziyyah, Endra Gunawan, Sri Widiyantoro, Irwan Meilano
Global Positioning System (GPS) stations in Lombok, Indonesia showed postseismic displacement following the 2018 Lombok earthquake sequence which occurred on 28 July 2018 (Mw 6.4), 5 August 2018 (Mw 6.9), 9 August 2018 (Mw 5.9), and the 19 August 2018 (Mw 6.3 and Mw 6.9). This research has investigated the contribution of afterslip and viscoelastic relaxation during the one-month period after the mainshock
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Emplacement dynamics of the plumbing system and lava pile of the Paraná Magmatic Province in Morro da Igreja, Santa Catarina, Brazil J. Geodyn. (IF 2.3) Pub Date : 2023-05-16 Ana Carolina Massulini Acosta, Luana Moreira Florisbal, Jairo Francisco Savian, Breno Leitão Waichel, Mateus Souza da Silva, Ricardo Ivan Ferreira da Trindade
The mechanisms of magma ascent, transport and emplacement of the volcanic pile from LIPs are key issues regarding the understanding of the complex construction of volcanic systems and magma transport through the crust. The integrated approach of morphology of the volcanic and subvolcanic bodies, whole rock geochemistry and ASM data provides a robust tool to unravel the flow dynamics of the volcanic
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Polyphase tectonics in the central Salzkammergut (Northern Calcareous Alps, Austria): An updated interpretation J. Geodyn. (IF 2.3) Pub Date : 2023-05-15 Nicola Levi
The Northern Calcareous Alps (NCA) (Austria) consist of detached Austroalpine covers, comprising mainly Permian evaporites and Triassic-Jurassic carbonates, topped by unconformable clastic sediments (Gosau Basin, Late Cretaceous-Eocene). The NCA experienced a polyphase deformation during the Eoalpine phase (Jurassic? mid-Cretaceous) followed by post-Eocene transpressive collisional tectonics. In the
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New structural analysis in North Dobrogea - a key region to unravel the tectonics of the Black Sea back-arc basin during the Mesozoic J. Geodyn. (IF 2.3) Pub Date : 2023-03-29 Yevgeniya Korniyenko-Sheremet, Aline Saintot, Antoneta Seghedi, Tom McCann, Marc Sosson
High-resolution structural analysis of stratigraphically-controlled units within North Dobrogea (ND), based on fieldwork and the production of new cross-sections as well as a reconstruction of the Mesozoic paleo-stress regimes, has resulted in a revision of the tectonic events across the region as well as demonstrating the significance of tectonic inheritance. The observed structures are closely related
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Multiple phases of deformation that shaped the southern Central Andes (36.5°S) from crosscutting relationships with Cenozoic retroarc magmatism J. Geodyn. (IF 2.3) Pub Date : 2023-03-17 Pablo Borghi, Lucas Fennell, Ricardo Gómez Omil, Andrés Folguera
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The role of the Ebro Block on the deformation experienced within the Pyrenean realm: Insights from deformable plate tectonic models J. Geodyn. (IF 2.3) Pub Date : 2023-02-06 Michael T. King, J. Kim Welford, Julie Tugend
Plate kinematic models of the Pyrenees have been extensively debated due to discrepancies between plate kinematic constraints for the Iberian plate and Atlantic/Tethyan related plate motions. Recently, the morphology of the Iberian plate and its partitioning into several continental blocks has been proposed as a solution towards reconciling discrepancies between previously published reconstructions
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Three-dimensional magnetotelluric signatures and rheology of subducting continental crust: Insights from Sikkim Himalaya, India J. Geodyn. (IF 2.3) Pub Date : 2023-01-18 Shankar Konda, Prasanta K. Patro, K. Chinna Reddy, Narendra Babu
3D inversion of broad band MT data present variation of electrical signatures across the subducting Indian crust in Sikkim Himalaya. The vertical and horizontal geoelectric cross-sections are dominated by north-east dipping conductive zones. Two high conductivity zones (4–8 Ω m) at a depth of 5–18 km in Lesser Himalayan Domain (LHD) are explained by conductive mineral assemblage associated with abundant
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Arc-like magmatism in syn- to post-collisional setting: The Ediacaran Angra Fria Magmatic Complex (NW Namibia) and its cross-Atlantic correlatives in the south Brazilian Florianópolis Batholith J. Geodyn. (IF 2.3) Pub Date : 2022-12-27 Vojtěch Janoušek, Luana Moreira Florisbal, Jiří Konopásek, Petr Jeřábek, Maria de Fátima Bitencourt, Petr Gadas, Vojtěch Erban, Veronika Kopačková-Strnadová
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Mantle structure and dynamics at the eastern boundary of the northern Cascadia backarc J. Geodyn. (IF 2.3) Pub Date : 2022-12-21 Claire A. Currie, Deirdre A. Mallyon, Tai-Chieh Yu, Yunfeng Chen, Andrew J. Schaeffer, Pascal Audet, Yu Jeffrey Gu
The tectonics of southwestern Canada are dominated by the Cascadia subduction zone. The northern Cascadia backarc encompasses a > 400 km wide region of the Southern Canadian Cordillera. Geophysical observations, including seismic tomography and surface heat flow, show that the backarc is characterized by a hot, thin lithosphere (60–70 km). The eastern limit of the backarc approximately underlies the
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The fault and stress patterns of Western Transbaikalia J. Geodyn. (IF 2.3) Pub Date : 2022-12-15 A.V. Cheremnykh, I.K. Dekabryov
Stress patterns are reconstructed for large fault zones and the respective fault-bounded blocks in Western Transbaikalia (southeast of Lake Baikal). The reconstruction is based on analysis of structural measurements combined with slickenside data and earthquake mechanisms. The combination of several methods for stress inversion provides high quality of the results. The inferred diversity of local stress
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Enigmatic crustal and upper mantle structure in the NE Sino-Korean Craton based on nuclear explosion seismic data J. Geodyn. (IF 2.3) Pub Date : 2022-12-05 Xiaoqing Zhang, Hans Thybo, Irina M. Artemieva, Tao Xu, Zhiming Bai
We interpret the crustal and upper mantle structure along ∼2500 km long seismic profiles in the northeastern part of the Sino-Korean Craton (SKC). The seismic data with high signal-to-noise ratio were acquired with a nuclear explosion in North Korea as source. Seismic sections show several phases including Moho reflections (PmP) and their surface multiple (PmPPmP), upper mantle refractions (P), primary
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Gravity data inversion applying a metaheuristic Bat algorithm for various ore and mineral models J. Geodyn. (IF 2.3) Pub Date : 2022-12-05 Khalid S. Essa, Zein E. Diab
Geophysical methods, especially the gravity method, are very helpful in ore and mineral explorations. Here, gravity modeling and interpretation for the subsurface geologic structures generally assumes either homogenous or spatially varying densities within target source rocks and surrounding structures. Therefore, the use of simple-geometric bodies helps in the validation of the subsurface ore and
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Latest Cambrian stage of evolution of Precambrian continental crust in the Aktyuz high-pressure Complex (Chu-Kendyktas terrane; North Tien Shan): New evidence from the SW part of the Central Asian Orogenic Belt J. Geodyn. (IF 2.3) Pub Date : 2022-12-05 Anfisa V. Skoblenko (Pilitsyna), Nadezhda A. Kanygina, Andrey A. Tretyakov, Kirill E. Degtyarev, Truong Tai Nguyen, Kwan-Nang Pang, Victor S. Sheshukov, Kseniya G. Erofeeva
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Seismic deformation in the Adriatic Sea region J. Geodyn. (IF 2.3) Pub Date : 2022-11-30 B. Orecchio, D. Presti, S. Scolaro, C. Totaro
We present an overall analysis of the recent seismic activity occurred in the Adriatic Sea region, a strongly debated sector of the Mediterranean area, where several authors have proposed different models of plate configuration and kinematics. In the past, seismic investigations of this marine area have been strongly hampered by non-optimal network geometries, but data quality increase and recent methodological
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Lithospheric S-velocity structure of the on-shore Potiguar Basin, NE Brazil: High heat-flow in an aborted rift J. Geodyn. (IF 2.3) Pub Date : 2022-11-30 Thabita Barbosa, Jordi Julià, Aderson F. Do Nascimento
The lithospheric structure of the on-shore Potiguar Basin has been investigated through velocity-depth profiles developed from the joint inversion of receiver functions and surface-wave dispersion at 16 seismic stations in and around the basin. The Potiguar Basin is an aborted rift basin that formed during the opening of the South Atlantic Ocean in the Lower Cretaceous, and is characterized by an unusual
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Structurally controlled mineralization in parts of Aravalli craton, India: Constraints from gravity and magnetic data J. Geodyn. (IF 2.3) Pub Date : 2022-11-30 S. Bangaru Babu, A.V. Satyakumar, Ajay Vinayak Kulkarni, Parijat Kishan Vats
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Lithosphere-atmosphere-ionosphere coupling associated with four Yutian earthquakes in China from GPS TEC and electromagnetic observations onboard satellites J. Geodyn. (IF 2.3) Pub Date : 2022-11-25 Xuemin Zhang, Jing Liu, Angelo De Santis, Loredana Perrone, Pan Xiong, Xin Zhang, Xiaohui Du
During 2008–2020, four strong earthquakes occurred in Yutian, Xinjiang Uygur Automous Region, northwest China, in particular, two M7 + and two M6 + earthquakes demonstrating the high tectonic activity of this region. We systematically use multiple electromagnetic data from satellites and ground, such as GIM TEC (Global Ionospheric Mapping Total Electron Content) published by JPL (Jet Propulsion Laboratory)
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U-Pb geochronology and geochemistry of the Torud igneous rocks: Implications for post-collision Eocene magmatism in northeast Iran J. Geodyn. (IF 2.3) Pub Date : 2022-10-22 Morteza Khalatbari Jafari, Hassan A. Babaie, Songjian Ao, Wenjiao Xiao
New geochemical and U-Pb isotopic data from the Torud volcanic and subvolcanic rocks and their associated dikes exposed along the southern margin of the Sabzevar-Torud zone provide new evidence for Early-Middle Eocene, post-collision magmatism in northeast Iran. The 52–46 Ma (late Ypresian-Lutetian) U-Pb age interval of zircons separated from these rocks confirm the paleontological age of nummulite-bearing
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Quaternary deformation patterns in East–Central Iran, constrained by coseismic–postseismic displacements of the 2017 Hojedk triplet earthquake in the Kerman Province J. Geodyn. (IF 2.3) Pub Date : 2022-09-21 Marzieh Khalili, Yildirim Dilek, Leila Zareian Ronizi
The Central Iranian Microcontinent (CIM) in east-central Iran is located north of the active Arabia–Eurasia collision zone. Here, we report on the structure, deformation patterns, and earthquake occurrences along the dextral Lakar–Kuh and Godar fault systems in the CIM. The geometry of these fault systems marks a major restraining bend responsible for surface and rock uplift in the Plio–Pleistocene
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Salt diapirism in the eastern margin of the Pre-Caspian Basin: Insight from physical experiments J. Geodyn. (IF 2.3) Pub Date : 2022-09-21 Jing Ziyan, Li Guobin, Zhang Yajun, Xie Tianfeng, Feng Yuan, Zhao Binbin, Wang Hongbin, Dai Shuang, Yang Zhaoping, Yuan Xiaoyu, Shi Zhongsheng, Tian Xin
Since the 1950 s, salt diapirism has been shown to be closely related to hydrocarbon accumulation and has been a hot spot of research activity in structural and petroleum geology. Many salt structural, such as salt wall, roller, pillow, welt and anticline have been formed in the Pre-Caspian Basin during the post-Kungurian (Lower Permian) times. Meanwhile, mechanisms of salt structure deformation and
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Stress evolution on major faults in Tien Shan and implications for seismic hazard J. Geodyn. (IF 2.3) Pub Date : 2022-09-16 Yajin Pang
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Lithosphere structure in the collision zone of the NW Himalayas revealed by alocal earthquake tomography J. Geodyn. (IF 2.3) Pub Date : 2022-06-01 Irina Medved, Ivan Koulakov, Sagarika Mukhopadhyay, Andrey Jakovlev
In this study, we obtained new 3D seismic tomography models of the crust and uppermost mantle beneath the northwestern Himalayas down to a depth of 120 km. The data were provided by the India Meteorological Department (IMD) and complemented by the Global International Seismological Centre (ISC) Catalogue. The distribution of anomalies correlates with the main geological features of the region. Specifically
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Upper mantle seismic structure in the Ordos Block, China J. Geodyn. (IF 2.3) Pub Date : 2022-05-20 S.H. Huang, H. Thybo, S.W. Dong, I.M. Artemieva, R.Z. He, B.F. Han, Q. Zhou, W. Shi
The Ordos Block in the western part of the North China Craton is enigmatic in having contrasting topographic structure in the northern and southern parts, while previous geophysical studies show little difference in crustal and upper mantle structure across the region. Here we present a new model of upper mantle structure in the Ordos Block region in order to test the importance of mantle heterogeneity
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Permian–Triassic adakitic igneous activity at Northern Mongolia: Implication for Permian–Triassic subduction system at the Siberian continental margin J. Geodyn. (IF 2.3) Pub Date : 2022-05-13 Kanta Umeda, Nemekhbayar Purevsuren, Kazuhiro Tsukada, Lodoidanzan Altansukh, Bayart Nadmid, Khishigsuren Sodnom, Manchuk Nuramkhaan, Taro Kabashima, Tomoyuki Kondo
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Localization and characterization of the southern Ulsan fault (UF) using geo-electrical imaging: Implication for seismic hazard assessment in an urbanized area J. Geodyn. (IF 2.3) Pub Date : 2022-04-29 Sambit Prasanajit Naik, Ohsang Gwon, Kiwoong Park, Sang Yeol Bae, Hyeon-Cho Shin, Jeong-Heon Choi, Young-Seog Kim
In seismic hazard assessment, subsurface geophysical surveying has gained popularity in recent years towards fault mapping and determining seismic deformation parameters such as fault offset, recurrence, and depth of fault, locating proper trench sites based on the subsurface information. In the present study, electrical resistivity tomography (ERT) was used to (1) locate the trace of the southern
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The 2021 Mw7.4 Maduo earthquake: Coseismic slip model, triggering effect of historical earthquakes and implications for adjacent fault rupture potential J. Geodyn. (IF 2.3) Pub Date : 2022-04-14 Xianwen Liu, Qiang Chen, Yinghui Yang, Qian Xu, Jingjing Zhao, Lang Xu, Rong Liu
On 22 May 2021 (CST), an Mw7.4 earthquake struck Maduo County, Qinghai Province, China, which was the largest seismic event in China since the 2008 Mw7.9 Wenchuan earthquake. Several scientific questions associated with the event could be addressed: (1) what fault slip model can explain the Maduo earthquake? (2) what effects do historical earthquakes impose on the Maduo earthquake? and (3) what implications
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Earthquake swarms in West Bohemia are most likely not rain triggered J. Geodyn. (IF 2.3) Pub Date : 2022-02-18 Josef Vlček, Roman Beránek, Tomáš Fischer, Jan Vilhelm
Water levels in anthropogenic reservoirs are often studied in terms of the influence of their fluctuation to pressure perturbations in the bedrock and possible triggering of nearby seismic activity. In this paper, we examine the possibility of a similar relationship in the West Bohemia/Vogtland region on the border of the Czech Republic and Germany. This area is well known for the occurrence of earthquake
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Seismotectonic analysis of the 2021 Damasi-Tyrnavos (Thessaly, Central Greece) earthquake sequence and implications on the stress field rotations J. Geodyn. (IF 2.3) Pub Date : 2022-01-31 Ioannis Kassaras, Vasilis Kapetanidis, Athanassios Ganas, Andreas Karakonstantis, Panayotis Papadimitriou, George Kaviris, Vasiliki Kouskouna, Nicholas Voulgaris
In early March 2021, three shallow earthquakes, two mainshocks with M6.3 and M6.0 and one major aftershock with M5.6 impacted both the mountainous Damasi-Tyrnavos region (northern Thessaly, Greece) and the adjacent Plio-Quaternary basin. Each major event was followed by rich aftershock activity recorded by local and regional seismographs and accelerographs. Herein, we present a comprehensive analysis