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Middle Jurassic orogeny in the northern North China block Tectonophysics (IF 3.048) Pub Date : 2021-01-20 Guo-Li Wu; Qing-Ren Meng; Ri-Xiang Zhu; Long-Gang Fan; Kai Meng; Hong-Hong Wei; Liang Duan; Ji-Chang Zhu
Multiple shortening took place during the Mesozoic in the periphery of the North China block (NCB), a major tectonic grain of East Asia, but no consensus exists as to the timing, intensity, and causes of individual events. This work focuses on the first phase shortening in Jurassic, which represents the initiation of Yanshanian orogeny, by investigating the structural evolution of the Yanshan belt
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Shear deformation of nano- and micro-crystalline olivine at seismic slip rates Tectonophysics (IF 3.048) Pub Date : 2021-01-20 Manuel Thieme; Giacomo Pozzi; Sylvie Demouchy; Nicola De Paola; Fabrice Barou; Sanae Koizumi; Leon Bowen
Several thermally activated mechanisms have been proposed to explain the dynamic weakening of faults at fast, seismic slip rates v > 0.1 m s−1. Nevertheless, direct constraints from microstructural observations on the operation of such weakening mechanisms are still lacking for most rock forming minerals. This includes olivine, a very refractory mineral relevant for seismic activity occurring in peridotite
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Seismic features of the Permian Basin Region from receiver function analysis Tectonophysics (IF 3.048) Pub Date : 2021-01-09 Peng Li; Guo-Chin Dino Huang; Alexandros Savvaidis
We used receiver function (RF) analysis to derive new seismic models of Moho depth, crustal Vp/Vs ratio, depth of sedimentary velocity discontinuity, and corresponding sedimentary Vp/Vs ratio in the Permian Basin region from the seismic waveform data of 260 moment magnitude (Mw) ≥ 6 teleseismic events. We obtained the optimal models by searching one- and two-layer models and comparing similarity between
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Enhancement of interplate coupling in adjacent segments after recent megathrust earthquakes Tectonophysics (IF 3.048) Pub Date : 2021-01-09 Mohammad Yuzariyadi; Kosuke Heki
Landward increase of surface velocity has been found for segments adjacent along-strike to megathrust faults after the 2003 Tokachi-oki and the 2011 Tohoku-oki earthquakes, NE Japan. A similar increase of landward velocities was reported for the segments to the north of the rupture of the 2010 Maule earthquake, Chile. We utilize available GNSS data to find such changes for six megathrust earthquakes
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Vp/Vs ratios in the Parnaíba Basin from joint active-passive seismic analysis – Implications for continental amalgamation and basin formation Tectonophysics (IF 3.048) Pub Date : 2021-01-01 Christian Schiffer; Marcus V.A.G. de Lima; José E.P. Soares; Randell Stephenson; Vitto C.M. de Araújo; Flávio T. Lima; Fábio A.S. Rocha; Cíntia R. Trindade; Reinhardt A. Fuck
The Phanerozoic intracontinental Parnaíba Basin in northeast Brazil lies atop crust composed of Archaean to Mesoproterozoic cratonic blocks and Neoproterozoic mobile belts. Recently, active and passive source geophysical surveys characterised the crustal structure beneath the basin. We use information from published active-source seismic and new, coincident receiver function (RF) data to obtain Vp/Vs
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Active north-vergent thrusting in the northern Sicily continental margin in the frame of the Quaternary evolution of the Sicilian collisional system Tectonophysics (IF 3.048) Pub Date : 2021-01-19 Attilio Sulli; Maurizio Gasparo Morticelli; Mauro Agate; Elisabetta Zizzo
A three-stage evolution has characterized the Sicilian Fold and Thrust Belt (SFTB) during the last 15 My: two main thin-skinned shortening events involving mainly Meso-Cenozoic carbonate units, followed by thick-skinned thrusting involving Plio-Pleistocene deposits in the frontal area as well as the crystalline basement in the inner and deeper sector of the chain. We investigated the northern Sicily
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Position of the Tarim Craton in Gondwana: Constraints from Neoproterozoic to early Paleozoic strata in South Tarim, NW China Tectonophysics (IF 3.048) Pub Date : 2021-01-18 Peng Wang; Guochun Zhao; Yigui Han; Qian Liu; Jinlong Yao; Shan Yu
Some Asian blocks were welded into Gondwana, whereas their positions in Gondwana are controversial, especially the Tarim Craton. This is mainly because the Tarim Craton is largely occupied by the Taklamakan desert and only a few rocks crop out along its margins. In this study, we investigate previously little-studied early Neoproterozoic to late Silurian strata, compile up-to-date published data in
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Controls of subducting slab dip and age on the extensional versus compressional deformation in the overriding plate Tectonophysics (IF 3.048) Pub Date : 2020-12-30 Ritabrata Dasgupta; Nibir Mandal; Changyeol Lee
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The 2019 Mw 5.8 Changning, China earthquake: A cascade rupture of fold-accommodation faults induced by fluid injection Tectonophysics (IF 3.048) Pub Date : 2021-01-08 Tao Li; Jianbao Sun; Yuxin Bao; Yan Zhan; Zheng-Kang Shen; Xiwei Xu; Cecile Lasserre
Industrial production activities associated with salt mining, hydraulic fracturing, or geothermal exploitation can induce pore pressure and stress field changes, thus inducing seismic activity. Most of the events are not disastrous due to limited energy radiated. Here we report a Mw 5.8 damaging event that occurred in Changning, China on June 17, 2019, probably the largest induced event by industrial
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Source Mechanism and Rupture Process of the 24 January 2020 Mw 6.7 Doğanyol–Sivrice Earthquake obtained from Seismological Waveform Analysis and Space Geodetic Observations on the East Anatolian Fault Zone (Turkey) Tectonophysics (IF 3.048) Pub Date : 2021-01-15 Tuncay Taymaz; Athanassios Ganas; Seda Yolsal-Çevikbilen; Felipe Vera; Tuna Eken; Ceyhun Erman; Derya Keleş; Vasilis Kapetanidis; Sotirios Valkaniotis; Ilektra Karasante; Varvara Tsironi; Peter Gaebler; Diego Melgar; Taylan Öcalan
Here, we present the source mechanism and rupture process for the destructive 24 January 2020 Mw 6.7 Doğanyol–Sivrice earthquake at the East Anatolian Fault Zone (EAFZ, Turkey), obtained from seismological waveform analysis and space geodetic observations. Multi-data analyses and modelling in the present study provide fundamental data and strong constraints for retrieving complex source mechanism of
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The 2014 Juan Fernández microplate earthquake doublet: Evidence for large thrust faulting driven by microplate rotation Tectonophysics (IF 3.048) Pub Date : 2021-01-09 Simone Cesca; Carla Valenzuela Malerán; José Ángel López-Comino; Timothy Davis; Carlos Tassara; Onno Oncken; Torsten Dahm
On October 9, 2014, a Mw 7.1–6.7 seismic doublet occurred at the Juan Fernández microplate, close to the triple junction with Pacific and Nazca plates. The Mw 7.1 earthquake is the largest earthquake ever to have been recorded in the region. Its thrust focal mechanism is also unusual for the region, although the northern part of the microplate is expected to undergo compression. The region is remote
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Oroclinal buckling and associated lithospheric-scale material flow – insights from physical modelling: Implication for the Mongol-Hingan orocline Tectonophysics (IF 3.048) Pub Date : 2020-12-27 Ondřej Krýza; Ondrej Lexa; Karel Schulmann; Alexandra Guy; Denis Gapais; John Cosgrove; Wenjiao Xiao
We present a new analogue model of oroclinal buckling, which is based on recent advances in our geological understanding of the Mongolian orocline in the Central Asian Orogenic Belt. The model simulates an amplification of a preexisting, gently arcuated accretionary system. In the analogue models, we established three neighboring subdomains that represent contrasting lithospheric domains separated
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Structural signatures of the Amazonian Craton in eastern Colombia from gravity and magnetometry data interpretation Tectonophysics (IF 3.048) Pub Date : 2021-01-11 Ismael Enrique Moyano Nieto; German A. Prieto
Geophysical interpretation of potential field data plays an important role in the integration of geological data. Estimation of density and magnetic susceptibility variations within the upper crust helps evaluating the continuity of geological structures in the field. In the present study we use gravity and magnetic data in NW Amazonian Craton in Colombia. Total horizontal gradient of the reduction
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Geophysical constraints on the nature of lithosphere in central and eastern Tibetan plateau Tectonophysics (IF 3.048) Pub Date : 2021-01-09 Lun Li; Xuezhen Zhang; Jie Liao; Yanling Liang; Shixian Dong
The structure and rheology of lithosphere are fundamental to understanding lithospheric deformation operating within the Tibetan plateau and hence holds significant implications for continental dynamics. Yet, some of these aspects remain less well constrained in Tibet. In this study we construct new models of isotropic-average shear-wave velocity and radial anisotropy from previously published Rayleigh-wave
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Seismic energy radiation and along-strike heterogeneities of shallow tectonic tremors at the Nankai Trough and Japan Trench Tectonophysics (IF 3.048) Pub Date : 2021-01-01 Suguru Yabe; Satoru Baba; Takashi Tonegawa; Masaru Nakano; Shunsuke Takemura
Shallow slow earthquakes have been documented along shallow plate interfaces near trenches. Recent geophysical observation networks located offshore of Japan enable us to analyze shallow tremors in the Nankai Trough and the Japan Trench. Onshore seismic stations are also important for detecting shallow very low frequency earthquakes (VLFEs) and for evaluating their seismicity prior to the deployment
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Polyphased brittle deformation around a crustal fault: A multi-scale approach based on remote sensing and field data on the mountains surrounding the Têt hydrothermal system (Eastern Pyrénées, France) Tectonophysics (IF 3.048) Pub Date : 2021-01-07 Taillefer Audrey; Milesi Gaétan; Soliva Roger; Monnier Loïs; Delorme Pauline; Guillou-Frottier Laurent; LeGoff Elisabeth
Studying hydrothermal systems in basement environments requires knowledge of fault and fracture network distributions. This study addresses this through multi-scale structural analysis of the Têt fault and its surrounding fracture systems (Eastern Pyrénées) using remote sensing and field data. This study aims to achieve this through: 1) precisely mapping and describing the brittle fault network, 2)
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Source mechanism and triggered large aftershocks of the Mw 6.5 Ambon, Indonesia earthquake Tectonophysics (IF 3.048) Pub Date : 2020-12-22 David P. Sahara; Andri D. Nugraha; Abdul Muhari; Andi Azhar Rusdin; Shindy Rosalia; Awali Priyono; Z. Zulfakriza; Sri Widiyantoro; Nanang T. Puspito; Andreas Rietbrock; Aditya Lesmana; Dian Kusumawati; A. Ardianto; Aria Widhi Baskara; Yehezkiel Halauwet; Hasbi Ash Shiddiqi; Muhammad Taufiq Rafie; Raisha Pradisti; Erfin Elly
On September 26, 2019, a significant, Mw 6.5, earthquake shook Ambon region, Indonesia, causing severe damage on the Island(s) of Ambon. Due to the complexity of the fault network and in-situ stress field it was, up to now, not possible to define the fault plane using data from the BMKG regional seismic network. In this study, we analyze the fault plane of the 2019 Ambon earthquake and the reactivation
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Coseismic deformation and multi-fault slip model of the 2019 Mindanao earthquake sequence derived from Sentinel-1 and ALOS-2 data Tectonophysics (IF 3.048) Pub Date : 2020-12-24 Lei Zhao; Chunyan Qu; Xinjian Shan; Dezheng Zhao; Wenyu Gong; Yanchuan Li
From October to December 2019, a sequence of four earthquakes of Mw > 6.0 occurred in southern Mindanao, the Philippines, and revealed complex tectonics in this region. We used Advanced Land Observing Satellite (ALOS)-2 and Sentinel-1A/B Synthetic Aperture Radar (SAR) data to map the coseismic deformation and to constrain both the fault geometry and kinematics of coseismic slip distributions during
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Structural and chemical resetting processes in white mica and their effect on K-Ar data during low temperature metamorphism Tectonophysics (IF 3.048) Pub Date : 2021-01-04 Ismay Vénice Akker; Alfons Berger; Horst Zwingmann; Andrew Todd; Christoph E. Schrank; Michael W.M. Jones; Cameron M. Kewish; Timothy C. Schmid; Marco Herwegh
White mica has been widely used to date microstructures and tectonic events in faults, shear-zones and folds because of its suitability for radiogenic dating. However, complex (i) microstructural evolution, (ii) individual chemical evolution of the K-bearing phases, (iii) mixing of ‘detrital grains’ with newly formed and/or recrystallized or chemically reset grains as well as (iv) volume diffusion
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Widths of imbricate thrust blocks and the strength of the front of accretionary wedges and fold-and-thrust belts Tectonophysics (IF 3.048) Pub Date : 2020-12-30 Garrett Ito; Gregory F. Moore
Besides the large-scale wedge shape itself, the most prominent structural feature of accretionary wedges and fold-and-thrust belts is the common pattern of imbricate thrust faults. This study illuminates the fundamental mechanical processes and material properties controlling the width of the crustal blocks bounded by major thrusts using analytical solutions of stress as well as two-dimensional finite-difference
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Precambrian lithosphere beneath Hudson Bay: A new geological model based on the Hudson Bay Lithospheric Experiment (HuBLE), Canadian Shield Tectonophysics (IF 3.048) Pub Date : 2020-12-29 Michael V. Mints; Ksenia A. Dokukina; Tamara B. Afonina
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Tectonic regimes and stress patterns in the Vrancea Seismic Zone: Insights into intermediate-depth earthquake nests in locked collisional settings Tectonophysics (IF 3.048) Pub Date : 2020-11-24 Laura Petrescu; Felix Borleanu; Mircea Radulian; Alik Ismail-Zadeh; Liviu Maţenco
Earthquake nests are anomalous clusters of seismicity located far from active collisional systems in intraplate, locked suture zones, or the deep part of relic subducted slabs, challenging classic earthquake generation mechanism theories. The Vrancea Seismic Zone in Romania is such an upper-mantle seismic nest located in the SE Carpathians, releasing the largest strain in continental Europe. To better
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Seismicity in the upper plate of the Northern Chilean offshore forearc: Evidence of splay fault south of the Mejillones Peninsula Tectonophysics (IF 3.048) Pub Date : 2020-12-24 Francisco Pastén-Araya; Bertrand Potin; Sergio Ruiz; Lilly Zerbst; Florent Aden-Antoniów; Kellen Azúa; Efrain Rivera; Andreas Rietbrock; Pablo Salazar; Amaya Fuenzalida
The region around the Mejillones Peninsula is characterized by major onshore and offshore fault systems. The existence of major splay faults in these fault systems has been debated. To improve our undestanding of seismotectonic processes affecting the MP, we built a new catalog of aftershocks of the 1995 Antofagasta earthquake (Mw 8.1) recorded by the CINCA seismic network. In addition, we build a
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Crustal and upper-mantle structure of the Eastern Caribbean and Northern Venezuela from passive Rayleigh wave tomography Tectonophysics (IF 3.048) Pub Date : 2020-12-23 Mariano S. Arnaiz-Rodríguez; Yang Zhao; Ana K. Sánchez-Gamboa; Franck Audemard
We explore the shear-wave lithospheric velocity structure of the Eastern Caribbean and Northern Venezuela using ambient noise tomography with stations deployed around the study area. We construct cross-correlation functions from continuous seismic records, and measure phase velocities of fundamental-mode Rayleigh waves. These velocities are further projected onto 0.6°x0.6° phase velocity grids for
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A new growth model of the northeastern Tibetan Plateau from high-resolution seismic imaging by improved double-difference tomography Tectonophysics (IF 3.048) Pub Date : 2020-12-14 Quan Sun; Shunping Pei; Zhongxiong Cui; Y. John Chen; Yanbing Liu; Xiaotian Xue; Jiawei Li; Lei Li; Hong Zuo
High-resolution 3-D P and S wave velocity (Vp and Vs) models of the crust and uppermost mantle beneath the northeastern (NE) Tibetan Plateau and the surrounding areas were obtained by applying an improved double-difference seismic tomography method on abundant body wave travel-time data of local and regional earthquakes collected from 1985 to 2018. The improved method not only increases constraints
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The closure of the Rocas Verdes Basin and early tectono-metamorphic evolution of the Magallanes Fold-and-Thrust Belt, southern Patagonian Andes (52–54°S) Tectonophysics (IF 3.048) Pub Date : 2020-12-01 A.P. Muller Veleda; Calderón Mauricio; C. Fosdick Julie; C. Ghiglione Matias; F. Cury Leonardo; Massonne Hans-Joachim; M. Fanning Christopher; J. Warren Clare; Ramírez de Arellano Cristobal; Sternai Pietro
The hinterland Western Domain of the Magallanes Fold-and-Thrust Belt (MFTB) between 52°-54°S is part of a poorly studied region of the southernmost Andean Cordillera. This domain consists of NNW-SSE trending tectonic slices of pre-Jurassic basement units and Late Jurassic-Early Cretaceous ophiolitic complexes and volcano-sedimentary successions of the Rocas Verdes Basin (RVB). New detrital zircon UPb
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Co-seismic beachrock deformation of 8th century AD Earthquake in Middle Strand of North Anatolian Fault, Lake Iznik, NW Turkey Tectonophysics (IF 3.048) Pub Date : 2020-11-23 Ahmet Evren Erginal; Ramazan Cüneyt Erenoğlu; Cengiz Yıldırım; H. Haluk Selim; Nafiye Güneç Kıyak; Oya Erenoğlu; Emin Ulugergerli; Mustafa Karabıyıkoğlu
A historical earthquake-related co-seismic deformation observed on beachrock beds along the southern shoreline of Lake Iznik is discussed as a new paleoseismic record for an 8th century AD earthquake in the Middle Strand of the North Anatolian Fault, NW Turkey. Electrical Resistivity Tomography (ERT) images beneath the beachrock surface allowed monitoring of the subsurface trace of a normal fault dipping
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Cenozoic tectonic inversion in the Northern Depression, South Yellow Sea Basin, East Asia: Structural styles and driving mechanism Tectonophysics (IF 3.048) Pub Date : 2020-11-23 Ruoyu Zhang; Fengli Yang; Panpan Hu; Xiaodong Yang; Yunxin Peng
The Northern Depression of the South Yellow Sea Basin underwent two episodes of tectonic inversion from the latest Eocene to Oligocene and in the Pliocene, respectively. During the inversion, the structural depression controlled previously by extensional faults was subjected to compression and erosion. Structural interpretation on 2D marine seismic data suggests that the structural styles associated
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Crustal seismogenic structures and deformation styles along the Longmen Shan Fault belt in the eastern Tibetan Plateau inferred from ambient noise tomography Tectonophysics (IF 3.048) Pub Date : 2020-11-23 Mei Feng; Hui Qian; James Mechie; Meijian An; Haibing Li; Guangqi Xue; Heping Su; Xiang Cui
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Three-dimensional numerical simulation of the interseismic and coseismic phases associated with the 6 April 2009, Mw 6.3 L'Aquila earthquake (Central Italy) Tectonophysics (IF 3.048) Pub Date : 2020-11-21 Matteo Albano; Salvatore Barba; Christian Bignami; Eugenio Carminati; Carlo Doglioni; Marco Moro; Salvatore Stramondo; Michele Saroli
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Passive seismic imaging of a craton edge – Central Australia Tectonophysics (IF 3.048) Pub Date : 2020-11-03 Shasha Liang; Brian L.N. Kennett
Passive seismic recordings of teleseismic P wave arrivals and their immediate coda along a dense profile of stations can be used to image the reflection structure beneath the profile. The process exploits the autocorrelation of the seismic signals that extracts the reflection response from the transmitted signals recorded at the surface, which can be migrated to provide a depth image. This common reflection
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Deep structure of the Demerara Plateau: From a volcanic margin to a Transform Marginal Plateau Tectonophysics (IF 3.048) Pub Date : 2020-11-10 T. Museur; D. Graindorge; F. Klingelhoefer; W.R. Roest; C. Basile; L. Loncke; F. Sapin
The Demerara Plateau (offshore Suriname and French Guiana) is located at the junction of the Jurassic Central Atlantic and the Cretaceous Equatorial Atlantic Oceans. The study of its crustal structure is fundamental to understanding its tectonic history, its relationship with the adjacent oceanic domains and to enlightening the formation of Transform Marginal Plateaus (TMPs). This study presents two
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The nature of the interface between basalts and serpentinized mantle in oceanic domains: Insights from a geological section in the Alps Tectonophysics (IF 3.048) Pub Date : 2020-10-17 Rémi Coltat; Yannick Branquet; Pierre Gautier; Philippe Boulvais; Gianreto Manatschal
The association of mafic extrusive rocks and serpentinized mantle rocks is a common feature encountered in numerous ultra-distal magma-poor rifted margins as well as in (ultra)slow-spreading oceanic settings where detachment faulting and mantle exhumation occur. Although seismic imaging and high-resolution TOBI radar allow imaging this association, the nature of this interface is poorly understood
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Response of Yunnan crustal structure to eastward growth of the Tibet Plateau and subduction of the India plate in Cenozoic Tectonophysics (IF 3.048) Pub Date : 2020-10-24 Yuan Ling; Tianyu Zheng; Yumei He; Guangbing Hou
Most previous studies advocate that crustal weakening in the Yunnan area is predominantly the result of eastward growth of the Tibetan Plateau. Here we observe regional variations in the Yunnan crustal structure from the waveform characteristic variations of receiver functions at 342 seismic stations. Furthermore, receiver function imaging along three seismic sections reveals the response of crustal
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Structural overprinting criteria determined from regional aeromagnetic data: An example from the Hill End Trough, East Gondwana Tectonophysics (IF 3.048) Pub Date : 2020-10-24 Khumo Leseane; Peter Betts; Robin Armit; Laurent Ailleres
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Kinematic evolution of a continental collision: Constraining the Himalayan-Tibetan orogen via bulk strain rates Tectonophysics (IF 3.048) Pub Date : 2020-10-19 Andrew V. Zuza; Yann Gavillot; Peter J. Haproff; Chen Wu
We investigated temporal variations of the bulk strain rate across the Himalayan-Tibetan orogen, which impact the magnitudes, rates, and distribution of deformation across the orogen. The present-day strain rate estimated from geodesy is ~5-6×10-16 s-1 and estimation of past rates depends on the orogenic shortening rate and effective orogen width. Plate-circuit reconstructions provide constraints on
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Seismic structure and tectonics of the continental wedge overlying the source region of the Iquique Mw8.1 2014 earthquake Tectonophysics (IF 3.048) Pub Date : 2020-10-15 Gabino Reginato; Emilio Vera; Eduardo Contreras-Reyes; Anne M. Tréhu; Andrei Maksymowicz; Juan Pablo Bello-González; Felipe González
On April 1, 2014, a large earthquake (Mw = 8.1) ruptured the central part of a historic seismic gap in northern Chile. In order to study the relationship between the co-seismic rupture characteristics and the crustal structure of the subduction zone, we processed a trench-perpendicular seismic reflection profile acquired across the zone of maximum slip and generated a P-wave velocity model. The results
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Methoni Mw 6.8 rupture and aftershocks distribution from a dense array of OBS and land seismometers, offshore SW Hellenic subduction Tectonophysics (IF 3.048) Pub Date : 2020-10-20 Maria Sachpazi; Vasilis Kapetanidis; Marinos Charalampakis; Mireille Laigle; Edi Kissling; Anna Fokaefs; Elena Daskalaki; Ernst Flueh; Alfred Hirn
Along the south-western offshore Hellenic subduction zone, the overriding Aegean upper plate above the Mediterranean oceanic lithosphere generates uncommon large earthquakes on the offshore megathrust fault. The largest subduction thrust event, for half a century, has been the 14 February 2008 Methoni earthquake (Mw = 6.8) that occurred offshore of the southwest coast of Peloponnesus. We conducted
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Analogue modelling of marginal flexure in Afar, East Africa: Implications for passive margin formation Tectonophysics (IF 3.048) Pub Date : 2020-08-24 Frank Zwaan; Giacomo Corti; Derek Keir; Federico Sani
The Afar region in East Africa is a key locality for studying continental break-up. Within Afar, passive margins are developing, of which the Southern Afar Margin (SAM) contains synthetic (basinward) faulting, whereas crustal flexure, antithetic faulting and marginal grabens occur along the Western Afar Margin (WAM). Numerous conflicting scenarios for the evolution of the WAM exist. In this analogue
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Quaternary deformation and uplift of coral reef terraces produced by oblique subduction and underthrusting of the Bahama Platform below the northern Hispaniola forearc Tectonophysics (IF 3.048) Pub Date : 2020-10-15 Javier Escuder-Viruete; Aratz Beranoaguirre; Pablo Valverde-Vaquero; Frank McDermott
Active tectonics linked to the rise of the Hispaniola forearc explain the morphological characteristics, spatial distribution and U-Th geochronological ages of the uplifted coral reef terraces of the La Isabela Formation in both the eastern Cordillera Septentrional and the Samaná Peninsula of northeastern Dominican Republic. Depositional coral reef terraces of MIS 5e (TII), 7e (TIII) and 9 (TIV) stages
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Friction properties of hornblende and implications for slow-slip events in subduction zones Tectonophysics (IF 3.048) Pub Date : 2020-10-17 Yang Liu; Changrong He
In order to understand the friction properties of amphibole as a primary constituent mineral in subduction zones, we used hornblende as the simulated gouge material to conduct two series of shearing experiments at temperatures from 101 to 607 °C under confining pressures of 136 MPa and 83 MPa, a pore pressure of 30 MPa and loading rates of 0.0488–1.22 μm/s. Steady-state friction coefficients in the
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Episodic exhumation and related tectonic controlling during Mesozoic in the Eastern Tian Shan, Xinjiang, northwestern China Tectonophysics (IF 3.048) Pub Date : 2020-10-21 Yue Chen; Guocan Wang; Paul Kapp; Tianyi Shen; Pan Zhang; Chengyu Zhu; Kai Cao
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Interactions between thin- and thick-skinned tectonics at the western Sichuan Basin, China Tectonophysics (IF 3.048) Pub Date : 2020-10-15 Maomao Wang; Wang Feng; Danqi Jiang; Bing Yan; Zhuxin Chen; Gonghua Song
This study investigates the geometry, kinematics, and interaction of thin- and thick-skinned tectonics at the western Sichuan Basin adjacent to the eastern margin of the Tibetan Plateau. A two-level detachment system, comprising a shallow Triassic and basal Precambrian detachment, was identified. Three-dimensional (3-D) structural modeling was applied to demonstrate the geometry of the shallow detachment
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Dynamics of continental lithosphere extension and passive continental rifting from numerical experiments of visco-elasto-plastic thermo-chemical convection in 2-D Cartesian geometry Tectonophysics (IF 3.048) Pub Date : 2020-10-24 Masaki Yoshida; Saneatsu Saito; Kazunori Yoshizawa
In contrast to active continental rifting, which is caused by the thermal erosion of active upwelling plumes, passive continental rifting is attributed to the extensional stress acting on the continental lithosphere due to either the basal drag force exerted by the passive mantle flow under the lithosphere or the boundary forces at the continental margins. Although the extension of continental lithosphere
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Rupture models and viscoelastic stress changes of three Mw ~ 6.3 earthquakes along the southern front of the Qilian Mountains, northeastern Tibetan plateau Tectonophysics (IF 3.048) Pub Date : 2020-10-24 Xiaojie Zhu; Jiankun He; Weimin Wang; Xun Wang; Jie Xiao
Around the southern front of the Qilian Mountains, three Mw 6.3 strong earthquakes have occurred since 2003. The distances between the epicenters of these events range from 18 to 46 km. By collecting available datasets, including broadband waveforms, coseismic surface geodetic measurements and active fault mapping results, we invert rupture models for these strong earthquakes with a finite fault model
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The focus thermal study around the spreading center of southwestern Okinawa trough Tectonophysics (IF 3.048) Pub Date : 2020-10-18 Liwen Chen; Hsieh-Tang Chiang; Jyun-Nai Wu; Ling-Yun Chiao; Chuen-Tien Shyu; Char-Shine Liu; Yunshuen Wang; Song-Chuen Chen
Voluminous hydrothermal systems are corresponding to the heat flow anomaly discovered from previous geophysical surveys in the Southern Okinawa Trough (SOT), which is an area with a high sedimentation rate supplied by the East China Sea shelf and the island of Taiwan. Our latest fifteen field measurements around the Geolin Mound (GLM) (24° 36.6 ‘N, 122° 53’E) are located at a sedimentary basin west
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Extrusion kinematics of UHP terrain in collisional orogen: EBSD and microstructure-based approach from Tso Morari Crystallines, Ladakh Himalaya Tectonophysics (IF 3.048) Pub Date : 2020-10-18 Dripta Dutta; Soumyajit Mukherjee
Several extrusion mechanisms have been proposed to explain the occurrences of ultra-high pressure (UHP) rocks at collisional margins. Here we assess the suitability of the channel flow model of extrusion for the Tso Morari Crystallines (TMC) by investigating the syn-extrusion deformation kinematics of the UHP eclogite-bearing gneisses that dominate the TMC. Samples were collected from two transects
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Magnetotelluric array in the central Finnish Lapland I: Extreme data characteristics Tectonophysics (IF 3.048) Pub Date : 2020-09-06 U.A. Autio; M.Yu. Smirnov
We present magnetotelluric (MT) data from the northern Fennoscandian shield, which show extreme behavior due to the complex geoelectric setting left behind by the tectonic reworking of the Archaean bedrock during the Palaeoproterozoic. The core of the MT data set from the central Finnish Lapland were acquired in 2014 in the context of the MaSca-project. Extreme data are defined by the condition where
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Anatomy of a buried thrust belt activated during hydraulic fracturing Tectonophysics (IF 3.048) Pub Date : 2020-10-18 Naimeh Riazi; David W. Eaton
Tectonically active fault networks are often inter-connected, but in the case of injection-induced seismicity, prior knowledge of fault architecture tends to be severely limited. In most cases, reactivated faults due to fluid injection are inferred, after-the-fact, by the spatial distribution of induced-seismicity hypocenters; such reliance on post-injection seismicity impedes any pre-operational risk
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Current challenges and future developments in magnetic fabric research Tectonophysics (IF 3.048) Pub Date : 2020-10-17 Andrea R. Biedermann
Magnetic fabrics are used extensively as proxies for mineral fabrics and to correct paleomagnetic data, and have been proposed to quantify pore fabrics. Today's understanding and interpretation of magnetic anisotropy benefits from decades of carefully observing anisotropic mineral and rock properties, establishing and testing empirical relationships between magnetic and mineral fabrics, and developing
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Explicit-implicit-integrated 3-D geological modelling approach: A case study of the Xianyan Demolition Volcano (Fujian, China) Tectonophysics (IF 3.048) Pub Date : 2020-10-17 Jiateng Guo; Jiangmei Wang; Lixin Wu; Cuizhi Liu; Chaoling Li; Fengdan Li; Min Lin; Mark Walter Jessell; Pengyu Li; Xinwei Dai; Jianrong Tang
Explicit interactive modelling and implicit interpolation modelling are the two classic three-dimensional (3-D) modelling approaches for reconstructing 3-D geological structures from sparse data. The limitations of using a single method appear when performing complex regional modelling containing various types of geological structures. However, due to the complication of spatial geometry computation
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Studying postseismic deformation of the 2010–2011 Rigan earthquake sequence in SW Iran using geodetic data Tectonophysics (IF 3.048) Pub Date : 2020-10-15 M. Amiri; Z. Mousavi; S. Atzori; F. Khorrami; M. Aflaki; C. Tolomei; K. Motaghi; S. Salvi
In this paper, we study the spatial distribution and temporal evolution of the postseismic deformation of the 2010–2011 Rigan earthquake sequence which occurred at the southern termination of the East Lut fault system, southeast Iran. One-year GPS measurements after the Rigan earthquake sequence reveals right-lateral postseismic displacement along the East Chahqanbar fault and left-lateral postseismic
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The off-fault deformation on the North Anatolian Fault Zone and assessment of slip rate from carbonate veins Tectonophysics (IF 3.048) Pub Date : 2020-10-15 Volkan KARABACAK; Uwe RING; I. Tonguç UYSAL
Discrepancies in earthquake characteristics between geodetically determined and geologically observed slip rates are prominent for the eastern part of the North Anatolian Fault (NAF) zone. We investigated the spatial distribution of deformation across a NAF fault segment near Erzincan, NE Turkey, through field observations of physiographic features along the principle fault and a carbonate-filled fissure
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Evidence for strain rate variation and an elevated transient geothermal gradient during shear zone evolution in the Cordillera Blanca, Peru Tectonophysics (IF 3.048) Pub Date : 2020-09-02 Cameron A. Hughes; Micah J. Jessup; Colin A. Shaw; Dennis L. Newell
The Cordillera Blanca shear zone (CBSZ) occupies the footwall of the Cordillera Blanca detachment fault, an active low-moderate angle detachment fault extending for ~200 km along the western margin of the Cordillera Blanca in central Peru. Recrystallized quartz paleopiezometry, two-feldspar thermometry on asymmetric strain-induced myrmekite, and structural analysis from the CBSZ provide evidence for
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RomUkrSeis: Seismic model of the crust and upper mantle across the Eastern Carpathians – From the Apuseni Mountains to the Ukrainian Shield Tectonophysics (IF 3.048) Pub Date : 2020-09-10 Vitaly Starostenko; Tomasz Janik; Victor Mocanu; Randell Stephenson; Tamara Yegorova; Tatiana Amashukeli; Wojciech Czuba; Piotr Środa; Anna Murovskaya; Katerina Kolomiyets; Dmytro Lysynchuk; Jan Okoń; Alina Dragut; Victor Omelchenko; Olga Legostaieva; Dmytro Gryn; James Mechie; Anatoly Tolkunov
RomUkrSeis is a controlled source wide-angle reflection and refraction (WARR) profile acquired in August 2014. It is 675 km long, running roughly SW-NE from the Apuseni Mountains in Romania and the Transylvanian Basin, crossing the arc of the Eastern Carpathian orogen and terminating in the East European Craton (EEC) in SW Ukraine. Well-constrained 2-D ray-tracing P- and partly S-wave velocity models
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Modelling tectonic deformation along the North-Anatolian Fault in the Sea of Marmara Tectonophysics (IF 3.048) Pub Date : 2020-09-05 S. Bulkan; P. Vannucchi; L. Gasperini; A. Polonia; C. Cavozzi
Using analogue techniques, we attempted to model the complex tectonic deformation pattern observed along the North-Anatolian Fault in the Sea of Marmara from morpho-bathymetry and seismic reflection images. In particular this paper focuses on the so-called Cinarcik segment of the fault connecting the eastern Izmit segment, which entirely ruptured during the Mw 7.4, 1999 earthquake, to the western segment
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Tilting, uplift, volcanism and disintegration of the South German block Tectonophysics (IF 3.048) Pub Date : 2020-09-03 Uwe Ring; Robert Bolhar
We present a large set of fault-slip data together with six UPb ages on calcite vein fillings constraining the kinematics and timing of near-surface (uppermost 2–3 km of crust) faulting of the uplifted South German block in the northern foreland of the NW-ward advancing Alps. The structural data confirm earlier studies showing Miocene subhorizontal NE-directed extension with shortening mainly being
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Deciphering deformation in ultramafic intrusions via magnetic fabric (AMS) and palaeomagnetic studies, Savannah Ni-PGE camp, NW Australia Tectonophysics (IF 3.048) Pub Date : 2020-09-03 James R. Austin, Benjamin O. Patterson
Knowledge of the internal architecture of mafic-ultramafic intrusions is critical to efficient targeting of magmatic Ni-PGE mineralisation. However, the visual homogeneity of such rocks in drill-core, coupled with poor outcrop in many areas can make their structure difficult to decipher using standard techniques. In this study we use measurements of anisotropy of magnetic susceptibility (AMS) and remanent
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Thermomechanical interactions between crustal magma chambers in complex tectonic environments: Insights from Eastern Turkey Tectonophysics (IF 3.048) Pub Date : 2020-08-29 Özgür Karaoğlu, Özgür Bayer, Metin Bilgehan Turgay, John Browning
Crustal segments, such as those in Eastern Turkey, which host magma chambers, volcanoes, and fault zones, experience complex stresses generated through interactions between regional tectonic loading, magmatic pressure, and geothermal dynamics. Here we model these competing loading mechanisms and examine their effects on generating stresses in a complex crustal segment which has been subjected to orogenesis
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2019 M6.7 Yamagata-Oki earthquake in the stress shadow of 2011 Tohoku-Oki earthquake: Was it caused by the reduction in fault strength? Tectonophysics (IF 3.048) Pub Date : 2020-08-28 Keisuke Yoshida, Naoki Uchida, Satoshi Hiarahara, Takashi Nakayama, Toru Matsuzawa, Tomomi Okada, Yoshiaki Matsumoto, Akira Hasegawa
Earthquake occurrence in the stress shadow provides a unique opportunity for extracting information about the physical processes behind earthquakes because it highlights processes other than the ambient stress change in earthquake generation. In this study, we examined the fault structure and the spatiotemporal distribution of the aftershocks of the 2019 M6.7 Yamagata-Oki earthquake, which occurred
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