-
Effects of fault roughness on estimating critical slip-weakening distance from fault slip history: A laboratory study Tectonophysics (IF 2.7) Pub Date : 2024-07-10 Peng Dong, Zhengyan Wang, Ying Xu, Kaiwen Xia
Earthquakes are the dynamic rupture of faults governed by fault weakening processes. Critical slip-weakening distance () is a crucial source parameter of earthquakes, and the determination of is of great concern to semiologists. However, determining for natural earthquakes is challenging due to the trade-off in inversed source models. To solve this problem, Fukuyama and his coworkers proposed a simple
-
Vp/Vs structure and Pn anisotropy across the Louisville Ridge, seaward of the Tonga-Kermadec Trench Tectonophysics (IF 2.7) Pub Date : 2024-07-10 Eduardo Contreras-Reyes, Ingo Grevemeyer, Christine Peirce, Sebastián Obando-Orrego
The Pacific Plate within the collision zone between the Louisville Ridge and the Tonga-Kermadec Trench was formed at the Osbourn Trough, a paleo spreading center that became inactive during the Cretaceous. In this region, the trench shallows from a depth of 8–11 km to ∼6 km below sea surface, while the outer rise topography is obscured by Louisville seamounts that rise 4–5 km above the adjacent seafloor
-
Triggered and recurrent slow slip in North Sulawesi, Indonesia Tectonophysics (IF 2.7) Pub Date : 2024-07-06 N. Nijholt, W. Simons, R. Riva, J. Efendi, D. Sarsito, T. Broerse
Nearby faults interact with each other through the exchange of stress. However, the extent of fault interaction is poorly understood. In particular, interactions may lead to slow-slip activity, resulting in episodes of transient surface motion. Our study concentrates on Northwest Sulawesi (Indonesia), which hosts two fault zones with potential for major earthquakes and tsunamis: the strike-slip Palu-Koro
-
Reprocessing and interpretation of legacy seismic data using machine learning from the Granada Basin, Spain Tectonophysics (IF 2.7) Pub Date : 2024-07-06 Carlos José Araque-Pérez, Teresa Teixidó, Flor de Lis Mancilla, José Morales
The Granada Basin (Spain) is a Neogene sedimentary depression with irregular geomorphology and deep depocenters. It is located in the most seismically hazardous part of the Iberian Peninsula with an historically experienced extremely destructive earthquakes, followed by periods of low to moderate seismicity. In 1980s the Chevron Oil Company collected a set of 30 deep seismic reflection sections in
-
The thermal structure of the Colombian lithosphere: A regional and basin-scale analysis Tectonophysics (IF 2.7) Pub Date : 2024-07-06 Harold Buitrago, Florian Neumann, Juan Contreras, Carlos A. Vargas
It is well-established that the thermal state of the lithosphere strongly influences various regional and local geological processes, including crustal deformation, hydrocarbon maturation, hydrogen generation, and geothermal phenomena. Moreover, the thermal structure exhibits high sensitivity to tectonic features, a property of particular significance in Colombia, where three main tectonic plates converge
-
From nappe stacking to strike-slip deformation: Alpine structural overprints refined by cave and karst geology in the Danubian thin-skinned units (Southern Carpathians, Romania) Tectonophysics (IF 2.7) Pub Date : 2024-07-01 Maria-Laura Tîrlă, Relu-Dumitru Roban, Ioan Munteanu, Virgil Drăgușin, Marius Vlaicu, Ionuț-Cornel Mirea
-
Predicting heat flow in the Iranian plateau and surrounding areas based on machine learning approach Tectonophysics (IF 2.7) Pub Date : 2024-06-28 Naeim Mousavi, Mohammad Tatar
While Surface Heat Flow (HF) is an important constraint unveiling the Earth interior's thermal structure, estimates over the Iranian plateau are sparse. In the presence of sparse estimates, machine learning provides a statistical-based prediction of HF based on a supervised predictor trained in the far-field regions. Here, we imply the machine learning technique of Gradient Boosting Regression Tree
-
Geotectonic architecture beneath Northern Vietnam revealed by local earthquake tomography combining seismic data from multiple networks Tectonophysics (IF 2.7) Pub Date : 2024-06-27 Vinh Long Ha, Hsin-Hua Huang, Bor-Shouh Huang, Le Minh Nguyen, Van Duong Nguyen, Thi Giang Ha, Quang Khoi Le, Quoc Van Dinh, Tu Son Le, Tien Hung Nguyen, Cong Nghia Nguyen, Kyle Ken Smith, Thuy Thanh Pham
Extrusion tectonics driven by the collision of Indian-Eurasian continents and the relative motion among microcontinents (e.g. South China, Simao-Indochina blocks) has led to multi-phase and complex geological activity and structures in Northern Vietnam. While extensively studied, its detailed crustal architecture in association with multiple large-scale shear zones and plate boundaries remains unclear
-
Active shortening and aseismic slip along the Cephalonia Plate Boundary (Paliki Peninsula, Greece): Evidence from InSAR and GNSS data Tectonophysics (IF 2.7) Pub Date : 2024-06-27 Varvara Tsironi, Athanassios Ganas, Sotirios Valkaniotis, Vasiliki Kouskouna, Efthimios Sokos, Ioannis Koukouvelas
We present a comprehensive analysis of geodetic data, including InSAR and GNSS, to assess the interseismic deformation of the Paliki peninsula in western Cephalonia, Greece. The region is prone to frequent earthquakes, due to its proximity to the Cephalonia Transform Fault (CTF), a 140 km long dextral strike-slip fault (striking NNE-SSW) that accommodates the relative motion between the Apulian and
-
Corrigendum to “Paleomagnetism in the Cambrian Urda-Los Navalucillos Limestone (Montes de Toledo, Spain): Implications for late-Variscan kinematics and oroclinal bending in the Central Iberian Zone” [Tectonophysics 852 (2023) /229781] Tectonophysics (IF 2.7) Pub Date : 2024-06-27 Manuela Durán Oreja, Pablo Calvín, Juan José Villalaín, Puy Ayarza, José R. Martínez Catalán
-
Strong controlling effect of stress evolution on the 2022 Ms5.0 Honghe earthquake sequence Tectonophysics (IF 2.7) Pub Date : 2024-06-26 Ye Zhu, Wenjie Fan, Yingfeng Ji, Weiling Zhu, Lili Feng, Rui Qu
Understanding stress evolution patterns as a response to earthquake ruptures at geologically complex tectonic faults is vital because of the role of fault geometry as a source for the stress evolutionary constraints. Here, we analyze the 2022 Ms5.0 Honghe earthquake sequence and calculate the tectonic stress distribution of the two Ms. ≥ 3.5 earthquakes in this sequence. Results indicate that the focal
-
A revolution in understanding SE Asia geodynamics since 20.5–18 Ma Tectonophysics (IF 2.7) Pub Date : 2024-06-22 Jean-Claude Sibuet, Siqing Liu, Minghui Zhao, Wen-Nan Wu, Yih-Min Wu, Jinhui Cheng, Jonny Wu
We present an updated evaluation of SE Asian geodynamics that includes the interactions of the South China Sea (SCS) marginal basin with surrounding plates since the end of SCS spreading 20.5–18 Ma. Newly available Ar/Ar ages of SCS oceanic crust drilled at IODP U1431 near the SCS East basin extinct spreading center are older than 18 Ma. Conversely, the oldest ages of the Luzon arc and forearc at Taiwan's
-
Seismic and Potential Field Constraints on Upper Crustal Architecture of Inner Bering Shelf, Offshore Southwestern Alaska Tectonophysics (IF 2.7) Pub Date : 2024-06-21 Rajesh Vayavur, Andrew J. Calvert
Southwestern Alaska encompasses a group of fault-bounded tectonostratigraphic terranes that were accreted to North America during the Mesozoic and Paleogene. To characterize the offshore extension of these terranes and several significant faults identified onshore, we reprocessed three intersecting multichannel deep seismic reflection profiles totaling ∼750 line-km that were shot by the R/V Ewing across
-
Numerical simulation of stress evolution and seismic moment budget along the central segments of the Xianshuihe-Xiaojiang fault system: Implications for seismic hazard assessment Tectonophysics (IF 2.7) Pub Date : 2024-06-21 Luyuan Huang, Shi Chen
The central segments of the Xianshuihe-Xiaojiang fault system (CSXXFS), which intersect densely populated areas, have remained seismically quiet without any strong earthquakes of M ≥ 7 for nearly two centuries. As such, conducting a comprehensive seismic hazard assessment of the CSXXFS serves as a crucial component of disaster mitigation efforts. To achieve this, we developed a finite element model
-
Lithological control of the active Mejillones fault from Triassic to Quaternary, northern Chile Tectonophysics (IF 2.7) Pub Date : 2024-06-15 Kellen Azúa, Francisco Pastén-Araya, José González-Alfaro, José Salomón, Sergio Ruiz, César Pastén, Pablo Salazar
Understanding the lithological control of crustal faults near cities is important for assessing the seismic hazard and characterising complex fault systems. We studied the Mejillones Fault (MF), located near one of the strategic ports in northern Chile. The MF is an active geological fault that extends 40 km in the N-S direction and is part of an extensive complex system of structures known as the
-
The Calipatria Deformation Zone revealed from 2D seismic profiles in the Mexicali Valley. Evidence of an ancient plate boundary? Tectonophysics (IF 2.7) Pub Date : 2024-06-15 Carlos Simón Reyes-Martínez, Mario González-Escobar, Juan Carlos Montalvo-Arrieta, Uwe Jenchen, Fernando Velasco-Tapia
The geological structures buried in the Mexicali Valley need to be better constrained. The Calipatria Fault is an essential key as it could represent an old strand of the San Andreas Fault system. Previous and two new seismic profiles in the Mexicali Valley and Altar Desert have been processed and interpreted. Chaotic and Low Amplitude Seismic Anomalies (CLASA) observed in the seismic profiles have
-
Unraveling Precambrian cratonic roots beneath South America: A contribution from surface wave tomography Tectonophysics (IF 2.7) Pub Date : 2024-06-15 André V.S. Nascimento, George S. França, Carlos A.M. Chaves, Giuliano S. Marotta, Marcelo Assumpção
We examine some aspects of the tectonic evolution of Precambrian cratonic roots beneath South America based on lithospheric distribution of shear-wave velocities. We derive our model by inverting 26,984 fundamental mode Rayleigh wave group velocity dispersion curves, at periods of 9–180 s. We first regionalize our measurements and then invert the result for a 3D S-wave velocity model extending to 200 km
-
Late Pleistocene Fault Slip Rate within the Bole Basin: Insights into deformation kinematics in the Central Tian Shan Tectonophysics (IF 2.7) Pub Date : 2024-06-13 Zongkai Hu, Xiaoping Yang, An Li, Haibo Yang
Tian Shan is a vast and highly seismically active intracontinental mountain range. GPS measurements and field studies have shown that E-W and NW-SE trending thrusts and fault-related folds are distributed across central Tian Shan. However, few studies have determined the fault and fault-related-fold activity in the Bole Basin, the northernmost part of central Tian Shan. In this study, we focus on the
-
Structural inheritances, fault segmentation and seismogenic potential at the front of the eastern Southern Alps (central Carnic Prealps, NE Italy) Tectonophysics (IF 2.7) Pub Date : 2024-06-13 M.E. Poli, G. Patricelli, G. Monegato, A. Zanferrari
New geological and morphotectonic surface data coupled with the revision of the ENI-Exploration & Production seismic lines, made it possible to review the tectonic structure of the Pliocene-Quaternary front of the eastern Southern Alps in the area between the Cellina River and the Tagliamento River (central Carnic Prealps, NE Italy). The eastern Southern Alps are a SE-verging fold and thrust belt in
-
Advancing seafloor sampling using submersibles and remotely operated vehicles: The cross-line laser orientation method Tectonophysics (IF 2.7) Pub Date : 2024-06-13 Kuniyuki Furukawa, Tatsuo Kanamaru, Kenichiro Tani, Noriko Kawamura, Jun Shibuya, Yuhji Yamamoto
Paleomagnetism has played a crucial role in unraveling processes such as plate motion and the emplacement of volcanic products. Despite its significance, a full range of such studies have not been possible for samples from the oceans, primarily due to the technical obstacles associated with obtaining oriented samples from the seafloor. Here we devised a rapid and uncomplicated technique for collecting
-
Dynamic subsidence in the Colorado basin, offshore Argentina, South Atlantic Tectonophysics (IF 2.7) Pub Date : 2024-06-13 Federico M. Dávila, Juan Pablo Lovecchio, Sebastián Toledo
The Colorado basin in the SW Atlantic is one of the key exploratory frontier basins along the Argentine shelf. The stratigraphy shows a typical rift basin, divided into two major seismic successions, a Jurassic-Lower Cretaceous synrift followed by an Upper Cretaceous to Cenozoic postrift. They represent, respectively, the breakup of Gondwana and passive margin evolution. While the synrift basin formation
-
What controls the magma production rate along the Walvis Ridge, South Atlantic? Tectonophysics (IF 2.7) Pub Date : 2024-06-08 Liang Huang, Chun-Feng Li
-
Defining shear zone deformation and alteration gradients: Pocologan Kennebecasis shear zone, Canadian Appalachians Tectonophysics (IF 2.7) Pub Date : 2024-06-04 Nicolas Piette-Lauzière, Kyle P. Larson, Dawn A. Kellett, Rüdiger Kilian, Michael Stipp, Riccardo Graziani, Isabelle Therriault
The impact of fluid-rock interaction during deformation is difficult to characterize at the regional scale because of the lack of continuous outcrops to provide textural evidence and meaningful spatial comparisons. Herein we introduce the use of bench top μXRF data as a cost-effective means to quantify chemical and deformation gradients within representative specimens from across the strain gradient
-
Seismotectonics of Sulawesi, Indonesia Tectonophysics (IF 2.7) Pub Date : 2024-06-01 Yopi Serhalawan, Po-Fei Chen
Sulawesi Island, located in eastern Indonesia, lies at the triple junction of the Australian, Sunda, and Philippine Sea plates. It exhibits a distinctive K-shape, with each arm having undergone independent geological evolution. Driven by the latest Miocene collision (∼5 Ma) between the Banggai-Sula microcontinent and the East Arm, the deformation is accommodated by the corresponding motion of individual
-
Controlling factors of a submarine landslide on the Kumano-nada continental slope, West Japan Tectonophysics (IF 2.7) Pub Date : 2024-05-31 Toshiya Kanamatsu, Juichiro Ashi, Kazuya Shiraishi
Submarine landslide deposits have been recognized in the downslope of a mega-splay fault of the Kumano-nada continental slope. A sediment core was recovered in the mega-splay fault area to find recent slope failures. The youngest mass transport deposit was identified 1.7 m below the seafloor in the study area based on physical properties, radiocarbon dating, and sedimentary and deformation structures
-
Mantle potential temperature and mantle Bouguer anomaly variations along the South Mid-Atlantic Ridge: Implications for ridge and plume interaction Tectonophysics (IF 2.7) Pub Date : 2024-05-31 Haitao Zhang, Quanshu Yan, Yangting Liu, Long Ma
-
Seismogenic structures and active creep in the Granada Basin (S-Spain) Tectonophysics (IF 2.7) Pub Date : 2024-05-31 Daniel Stich, Jose Morales, José Ángel López-Comino, Carlos Araque-Pérez, José Miguel Azañón, Miguel Ángel Dengra, Mario Ruiz, Moisés Weber
The Granada Basin is a slowly deforming intramountain basin in the Betic Cordillera (S-Spain). Despite historical and paleoseismological evidence for M6 earthquakes, instrumental seismicity lacks large events and the seismotectonic model must be built from small earthquakes (M < 5). Here, we reanalyze 35 years of data from the Granada Basin short period network, and further seismic stations with shorter
-
Deep versus shallow emplacement of sills and dykes: new insight from thermo-visco-elastic modelling Tectonophysics (IF 2.7) Pub Date : 2024-05-31 Harro Schmeling, Gernold Zulauf
Rapid emplacement of a mafic dyke or sill at mid-crustal depth heats and possibly melts the felsic wall rock followed by solidification. Associated volume changes generate stresses, possibly enforcing brittle failure and melt migration. We model the evolution of melting, solidification, temperature, and stress including visco-elastic relaxation in 1D - dykes or -sills using realistic rock rheologies
-
Tectonic deformation in El Salvador from combined InSAR and GNSS data Tectonophysics (IF 2.7) Pub Date : 2024-05-31 Juan Portela, Alejandra Staller, Marta Béjar-Pizarro, Ian J. Hamling, Douglas Hernández
The country of El Salvador, located at the convergent boundary of the Cocos and Caribbean plates, is subject to frequent seismic events and complex surface deformation. This paper presents the first Interferometric Synthetic Aperture Radar (InSAR)-based velocity field of El Salvador produced by combining InSAR and new GNSS data, which allows us to gain a deeper understanding of the intricate crustal
-
Intraslab seismicity migration simultaneously with an interface slow slip event along the Ecuadorian subduction zone Tectonophysics (IF 2.7) Pub Date : 2024-05-28 Alexander Wickham-Piotrowski, Yvonne Font, Marc Regnier, Bertrand Delouis, Jean-Mathieu Nocquet, Louis De Barros, Virginie Durand, Quentin Bletery, Monica Segovia
Slow slip events (SSEs) are transient slip episodes taking place along the plate interface of subduction zones. They usually occur synchronously to tectonic tremors and/or seismic swarms, but the relationship between slip and seismicity remains unclear. Here, we study a well-instrumented seismic swarm-SSE sequence near a highly coupled segment along the Ecuadorian subduction zone. GPS data reveal that
-
Dynamic triggering of earthquakes and the role of overpressure fluids in active geothermal areas in Yunnan, China Tectonophysics (IF 2.7) Pub Date : 2024-05-23 Zhiwei Wang, Xinglin Lei, Shengli Ma, Hong Fu, Xiaojing Hu, Kaiying Wang, Yusuke Mukuhira, Changrong He
The Yunnan area is rich in geothermal fluids, and thus seismicity in this region is considered to be sensitive to stress turbulence by earth tides and distant strong earthquakes. We have identified 13 distant strong earthquakes out of 110 that have dynamically triggered seismicity with a statistical significance of β value >2 and . The triggered seismic clusters show the following features. 1) Most
-
Azimuthal seismic anisotropy in the crust beneath the Granada Basin (Spain) Tectonophysics (IF 2.7) Pub Date : 2024-05-23 I. Serrano, M.A. Dengra, F. Torcal, D. Zhao
In this research, we conducted the first P-wave tomographic imaging of 3-D azimuthal anisotropy of the Granada Basin (Betic Cordillera, Spain) introducing recent advances in the application of this method, thanks to abundant, high-quality data sets recorded by a dense seismic network deployed in the study area during the Atarfe-Santa Fe seismic series (2020−2021). We also determined high-resolution
-
Timing and Kinematics of late Cenozoic Strike-slip Faults in the Western Tibetan Plateau: New Constraints from Provenance Analysis and Detrital Thermochronology Tectonophysics (IF 2.7) Pub Date : 2024-05-19 Xiaochun Wei, Hanlin Chen, Rong Yang, Ping Wang, Shanying Li, Xuhua Shi, Jin Ge
The activities of the three large strike-slip fault systems—the Karakoram, the Karakax, and the Longmu Co-Guozha Co faults—located in the western Tibetan Plateau have induced the intense exhumation of the Karakoram and the southern Western Kunlun ranges. However, the histories of these faults remain debated or loosely constrained, partly due to the restricted access to bedrock samples and associated
-
Power law dependence of unstable slip velocity on decreasing shear loading stiffness Tectonophysics (IF 2.7) Pub Date : 2024-05-17 Lu Gu, Shengwang Hao, Derek Elsworth
Shear loading stiffness plays a critical role in conditioning the stability of slip on reactivated faults. However, a relationship linking peak slip velocities and shear loading stiffness is lacking. To explore this, we shear granite faults in double direct shear with shear loading stiffnesses spanning two orders to define the effects of shear loading stiffness in conditioning the transition from stable
-
Kinematics, rheology, and cooling of the continental-scale Chongshan strike-slip shear zone on the southeast of the Tibetan plateau Tectonophysics (IF 2.7) Pub Date : 2024-05-15 Wenyuan Li, Shuyun Cao, Yanlong Dong, Lefan Zhan, Lirong Tao, Rodolfo Carosi, Chiara Montomoli
Quantitative analysis is crucial for understanding the tectonic evolution of continental-scale shear zones. To unravel the deformation history and processes of a continental strike-slip shear zone, we examined a range of deformed rocks from the Chongshan shear zone (CS-SZ) on the southeast of the Tibetan plateau. The detailed field observations, microstructural, and EBSD texture analyses reveal that
-
Shallow characteristics of Chenghai Fault Zone, Yunnan, China, from ambient noise tomography and horizontal-to-vertical spectral ratio with two dense linear arrays Tectonophysics (IF 2.7) Pub Date : 2024-05-15 Xiaona Ma, Wei Yang, Shanhui Xu, Yunpeng Zhang, Weitao Wang, Junhao Song, Chunyu Liu
High-resolution imaging of the shallow structure of a fault zone contributes valuable information about regional earthquake hazard and tectonic evolution. The Chenghai Fault (CHF), located in the eastern margin of the collision zone between the Indian and Eurasia plates, has accumulated significant shear strain and has hosted several strong earthquakes, but our understanding of its shallow structure
-
Lithospheric and asthenospheric anisotropic gradients along the Eastern North American Margin imaged by frequency dependent quasi-Love wave scattering Tectonophysics (IF 2.7) Pub Date : 2024-05-13 Colton Lynner, Zachary C. Eilon
The eastern North American margin has experienced a wide array of plate-scale tectonic deformational events, including the breakup of Pangaea. The margin may also host complex patterns of active asthenospheric mantle dynamics. Several studies have observed a strong change in anisotropy across the margin that have been interpreted variously as active asthenospheric flow or past lithospheric deformation
-
Intra-oceanic emplacement of the Comoros Archipelago through inherited fracture zones Tectonophysics (IF 2.7) Pub Date : 2024-05-12 Charles Masquelet, Louise Watremez, Sylvie Leroy, Daniel Sauter, Matthias Delescluse, Nicolas Chamot-Rooke, Jean Claude Ringenbach, Isabelle Thinon, Anne Lemoine, Dieter Franke
We shed light on the nature and structure of the crust surrounding the Comoros Archipelago, western Indian Ocean, offering insights into the region's geological history and volcanic island formation. Our comprehensive study encompasses the acquisition of new, deeply penetrating seismic data from the SISMAORE cruise (refraction and reflection seismic), and the subsequent analysis of the characteristics
-
Middle to lower crustal earthquakes in the western East Sea (Sea of Japan) and their implications for neotectonic evolution Tectonophysics (IF 2.7) Pub Date : 2024-05-11 Tae-Kyung Hong, Seongjun Park, Junhyung Lee, Jeongin Lee, Byeongwoo Kim
-
Shallow crustal imaging beneath NW Indian terrane from teleseismic P-wave coda using a Bayesian approach Tectonophysics (IF 2.7) Pub Date : 2024-05-10 Ayush Goyal, Bandlamudi Gowthami, Satish Maurya, Gollapally Mohan
Deciphering the crustal architecture of the Cretaceous Barmer-Sanchore Basin (BSB) and Neoproterozoic provinces in the NW Indian Shield presents significant challenges due to extensive sediment deposition and widespread felsic igneous rocks. To address such intricacies, we employ a transdimensional Bayesian joint inversion of teleseismic P-wave polarizations and receiver functions to resolve the detailed
-
Shear wave splitting and mantle dynamics of the southern Great Xing'an orogenic belt Tectonophysics (IF 2.7) Pub Date : 2024-05-09 Fei Gao, You Tian, Dapeng Zhao, Hongli Li, Cai Liu
We deployed a linear seismic array consisting of 50 broadband stations in the southern part of the Great Xing'an orogenic belt to investigate seismic anisotropy in the Songliao Basin, the orogenic belt and the Erlian Basin by making SKS wave splitting measurements. Different features of anisotropy are revealed on the two sides of the north-south gravity lineament. The anisotropy on the east side of
-
Multi-stage tectonic evolution of the Tatra Mts recorded in the para- and ferromagnetic fabrics Tectonophysics (IF 2.7) Pub Date : 2024-05-06 Dorota Staneczek, Rafał Szaniawski, Martin Chadima, Leszek Marynowski
The Tatra Mts form the highest part of the Carpathian mountain chain; however, their tectonic and thermal evolution is still debatable. Previous magnetic fabric studies have primarily focused on the crystalline basement and its autochthonous cover. We investigate the magnetic fabrics of Cretaceous marly limestones from a Mesozoic nappe unit and post-thrusting Oligocene shales and mudstones to unravel
-
Fairweather transform boundary Oligocene to present orogenesis: Fairweather Range vertical extrusion and rotation of the Yakutat microplate at ca. 3 Ma Tectonophysics (IF 2.7) Pub Date : 2024-05-06 Jeff Apple Benowitz, Richard Lease, Peter J. Haeussler, Terry Pavlis, Michael Everett Mann
Oblique-slip along transform fault boundaries is often partitioned between a strike-slip system and thrust faults that accommodate contraction. However, topography along the Yakutat-North American transform (Fairweather fault), is asymmetric with low-terrain above active thrusts on the western, Yakutat side of the transform and high topography on the continental side with peaks >4500 m (Mount Fairweather:
-
Quantification of grain boundary mobilities in natural olivine by annealing experiments and full-field modelling Tectonophysics (IF 2.7) Pub Date : 2024-05-03 Jean Furstoss, Sylvie Demouchy, Andrea Tommasi, Emmanuel Gardés, Fabrice Barou, Nicolas Marino
We investigate olivine grain boundary (GB) migration in natural peridotites experimentally annealed at high pressure and high temperature, and couple the experimental observations to full-field grain growth models to provide the distribution of GB mobilities in natural olivine polycrystals. A stack of four slices of natural mylonitic peridotite (Oman ophiolite) was annealed at 1473 K for 5 h under
-
Tomographic imaging of South Rewa basin, Central India: Implications of Gondwana rifting and Late Cretaceous volcanism Tectonophysics (IF 2.7) Pub Date : 2024-05-03 Laxmidhar Behera, S.P. Panigrahi, G.S.P. Rao, M.S. Reddy, P. Karuppannan, N. Premkumar, Sudeshna Moharana
-
Structural anatomy of the Munsiari and Vaikrita thrust zones, Garhwal Himalayas, India Tectonophysics (IF 2.7) Pub Date : 2024-05-01 Rahul Dixit, Deepak C. Srivastava, Gargi G. Deshmukh, Arvind K. Jain
The Munsiari and Vaikrita thrusts are crucial to understanding the geodynamic evolution of the Himalayas. However, the structural architecture and kinematic evolution of these thrusts and associated deformation zones are still poorly understood. Furthermore, the existing criteria for field identification of the Vaikrita Thrust are varied and ambiguous. We address these issues through extensive large-scale
-
The evolution of stresses and shear resistance on rough faults at large slip Tectonophysics (IF 2.7) Pub Date : 2024-04-30 Lior Wise, Yuval Tal
-
Brittle sedimentary strata focus a multimodal depth distribution of seismicity during hydraulic fracturing in the Sichuan Basin, Southwest China Tectonophysics (IF 2.7) Pub Date : 2024-04-26 Mengke An, Derek Elsworth, Fengshou Zhang, Rui Huang, Junlun Li, Zhengyu Xu, Zhen Zhong, Manchao He
The number of background earthquakes ( ≥ 0) in the southern Sichuan basin, southwest China, has increased thirtyfold as a result of hydraulic fracturing. Background events are originally deep (4–6 ) within the sedimentary section but build into a multimodal distribution both at depth and in the shallow stimulated reservoir (2–4 ) - representing a counterpoint to the usual triggering of seismicity on
-
Local earthquake tomography of the Aegean crust: Implications for active deformation, large earthquakes, and arc volcanism Tectonophysics (IF 2.7) Pub Date : 2024-04-24 P. Ranjan, K.I. Konstantinou
Three-dimensional velocity models can enable accurate earthquake location, improved seismic hazard assessment, and can enhance our understanding of geodynamic processes. This is particularly true for areas such as the Aegean, where the crust is marked by active volcanoes as well as shear and rift zones, all of which make this region highly heterogeneous. This work describes the application of local
-
Magnitudes and surface rupture lengths of paleo-earthquakes at the NW-part of the Peel Boundary fault zone, Roer Valley Rift System Tectonophysics (IF 2.7) Pub Date : 2024-04-22 R.T. Van Balen, R.E. Lapperre, H.A.G. Woolderink, J. Wallinga, C. Kasse
The Peel Boundary Fault zone (PBFZ) is the 125 km long, seismically active, northern bounding fault zone of the Roer Valley Rift System (RVRS). The last damaging earthquake along the PBFZ was the Roermond earthquake of 1992. It had a magnitude of Mw 5.3 and no surface rupture. Previous results from two trenching studies located in the central and southeastern parts of the PBFZ provided evidence for
-
Fault reactivation linked to rapid ice-mass removal from the Southern Patagonian Icefield (48–52°S) Tectonophysics (IF 2.7) Pub Date : 2024-04-21 Jean-Baptiste Ammirati, Kellen Azúa, Francisco Pastén-Araya, Andreas Richter, Douglas A. Wiens, María Constanza Flores, Sergio Ruiz, Pedro Guzmán-Marín, Federica Lanza, Gerd Sielfeld
The Southern Patagonian Icefield (SPI) lies above an area of slow convergence between Antarctic and South-America plates, where limited seismicity is recorded by global and regional seismic networks. To understand the seismic behavior of this zone, we analyze two years of continuous broad-band data recorded by 27 seismometers, deployed around the SPI. Substantial ice loss coupled with the unusually
-
Electrical conductivity of antigorite–olivine aggregates under high temperature and pressure: Implications for the water content in mantle wedges Tectonophysics (IF 2.7) Pub Date : 2024-04-21 Libing Wang, Duojun Wang
Antigorite–olivine aggregates were synthesized to serve as representative lithologies of subduction zones, which often suffered serpentinization due to the hydration of the mantle wedge. The electrical conductivities (EC) of antigorite–olivine aggregates with different antigorite proportions before and after dehydration at 2.0 GPa were measured. An increase in electrical conductivity prior to antigorite
-
The remarkable parallels between the North East Atlantic and Arctic regions Tectonophysics (IF 2.7) Pub Date : 2024-04-18 Gillian R. Foulger, Anatoly M. Nikishin, Ksenia F. Aleshina, Elizaveta A. Rodina
Geological understanding of the NE Atlantic and Arctic regions has increased greatly over the last two decades, revealing remarkable similarities. Continental extension in both regions onset during pausing or cessation of adjacent orogenies – the Verkhoyansk-Chukotka and Alpine orogenies – which relaxed compressional stresses and permitted extension. Severe extension accompanied by high-volume magmatism
-
Effects of crustal rheology and fault strength on the formation of the Qaidam Basin: Results from 2-D mechanical modeling Tectonophysics (IF 2.7) Pub Date : 2024-04-18 Chao Zhou, Jiankun He, Xiaojie Zhu, Xinguo Wang, Weimin Wang
The Cenozoic Qaidam Basin on the northern Tibetan Plateau is bounded by the foreland thrust belts of the East Kunlun Mountains to the south and Qilian Mountains to the north. In this basin, the maximum thickness of the accumulated sedimentary strata is ∼17 km near the geographic center of the basin. Such a basin architecture challenges the classic foreland-basin deformation model, wherein substantial
-
Geological interpretation of wide-angle seismic reflection/refraction profiles along the Scotian margin and across Nova Scotia, Canada Tectonophysics (IF 2.7) Pub Date : 2024-04-16 H. Ruth Jackson, Deping Chian, Thomas Funck, Sandra M. Barr, John Shimeld, Chris E. White, Matthew Salisbury
Two wide-angle seismic reflection/refraction profiles were acquired to determine the velocity characteristics of the Meguma terrane and adjacent Avalonia northeast of the Cobequid-Chedabucto Fault Zone (CCFZ) in eastern Canada. Line 99–1 is located along the Scotian margin whereas line 99–2 crosses the Scotian margin and onshore Nova Scotia and extends into the Gulf of St. Lawrence. Velocity models
-
Dynamic processes of the Southeast (SE) Asia convergent system and its impact on continental deformation and marginal basin formation: Preface Tectonophysics (IF 2.7) Pub Date : 2024-04-16 Weiwei Ding, Xiaolong Huang, Liang Zhao, Jonny Wu, Carla B. Dimalanta, Manuel Pubellier, Fei Wang
-
Advances in heat flow studies and thermal structure of the lithosphere Tectonophysics (IF 2.7) Pub Date : 2024-04-12 Massimo Verdoya, Graeme Beardsmore, Robert Harris
-
Structural architecture and tectonic evolution of the Campania-Lucania arc (Southern Apennines, Italy): Constraints from seismic reflection profiles, well data and structural-geologic analysis Tectonophysics (IF 2.7) Pub Date : 2024-04-12 Luigi Ferranti, Filippo Carboni, Assel Akimbekova, Maurizio Ercoli, Simone Bello, Francesco Brozzetti, Alberto Bacchiani, Giovanni Toscani
This paper sheds light on the structural architecture and tectonic evolution of the Campania-Lucania segment of the Southern Apennines orogen through an integrated analysis of mostly unpublished and partly published (CROP-04 line) seismic reflection profiles, exploratory well logs and geologic-structural relations among the lithostratigraphic units of this region. The pre-orogenic Mesozoic-Neogene
-
Cretaceous extensional and contractional stages in the Colombian Andes unraveled by a source-to-sink geochronological and thermochronological study in the Upper Magdalena Basin Tectonophysics (IF 2.7) Pub Date : 2024-04-03 L. Calderon-Diaz, S. Zapata, A. Cardona, M. Parra, E.R. Sobel, A.M. Patiño, V. Valencia, J.S. Jaramillo-Rios, J. Glodny
Extensional and flexural basins can evolve through multiple stages under the same plate tectonic regime over tens of millions of years. The Cretaceous tectonic evolution of the Colombian Andes is characterized by shifts between contractional and extensional tectonics. The upper plate response to these changes is recorded in the Cretaceous sedimentary rocks along the Western, Central, and Eastern cordilleras
-
Two-stage expansion of the South Qilian Shan during the mid-Miocene: Insights from provenance analysis in the northern Qaidam Basin, NW China Tectonophysics (IF 2.7) Pub Date : 2024-04-02 Wen-jun Zheng, Bing-xu Liu, Lei Duan, Wei-tao Wang, Xin Sun