TectonophysicsPub Date : 2025-09-02DOI: 10.1016/j.tecto.2025.230901
T. Román-Berdiel , B. Oliva-Urcia , S. Torres , L. Yenes , J.J. Villalaín , M. Marcén , A.M. Casas-Sainz
{"title":"Comparing magnetic fabrics in in-basin and out-of-basin domains: The Mesozoic western Cameros Basin (N Spain)","authors":"T. Román-Berdiel , B. Oliva-Urcia , S. Torres , L. Yenes , J.J. Villalaín , M. Marcén , A.M. Casas-Sainz","doi":"10.1016/j.tecto.2025.230901","DOIUrl":"10.1016/j.tecto.2025.230901","url":null,"abstract":"<div><div>Anisotropy of magnetic susceptibility (AMS) is a very sensitive and accurate technique for determining deformation in rocks that show no other markers of deformation. In the Mesozoic-Cenozoic history of the Iberian plate, two stages have been clearly defined: an extensional period in which large sedimentary basins were generated (Late Jurassic-Early Cretaceous), and a tectonic inversion stage during the Cenozoic compression. However, details on the development and evolution of these stages, as well as the transition from extensional to compressional regime are not yet well understood. The western Cameros Basin provides the opportunity for testing the applicability of magnetic fabric to determine the tectonic regime at the transition between the <em>syn</em>-rift and the post-rift sequences in an area close to the out-of-basin domain and therefore, suitable for recording the far-field and the near-field constraints. Furthermore, the influence of the subsequent inversion on the magnetic fabrics in these two sequences can be also discussed. In this work, we have focused on the Jurassic (mostly limestones), Lower Cretaceous (mostly shales) and Upper Cretaceous (mostly limestones) rocks, taking a total of 575 samples from 47 sites. AMS results show the record of the Alpine compressional stage for most of the sites of the post-rift materials, while the <em>syn</em>-rift materials record a NE-SW stretching direction. This indicates that the extensional tectonic imprint remains in in-basin domains even after compression (and probably layer parallel shortening) provided that the intensity of extensional deformation is significant (i. e. linked to basin formation). Conversely, out-of-basin domains generally record compressional fabrics, both in the thinned <em>syn</em>-rift and post-rift sequences. Another key point in this work is the analysis of the out-of-phase anisotropy of magnetic susceptibility, which has allowed to improve to some extent the definition of the magnetic fabric in the, <em>a priori</em>, unfavorable lithologies for AMS studies, such as the limestones of the Jurassic and Upper Cretaceous.</div></div>","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"914 ","pages":"Article 230901"},"PeriodicalIF":2.6,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145020488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
TectonophysicsPub Date : 2025-09-02DOI: 10.1016/j.tecto.2025.230903
Yibin Wu , Xiaobo Tian , Jiangtao Han
{"title":"Crustal architecture of the Bangong-Nujiang Suture reveals Meso-Tethyan bidirectional subduction: Evidence from Pn-wave receiver function imaging","authors":"Yibin Wu , Xiaobo Tian , Jiangtao Han","doi":"10.1016/j.tecto.2025.230903","DOIUrl":"10.1016/j.tecto.2025.230903","url":null,"abstract":"<div><div>The Bangong-Nujiang Suture (BNS), a pivotal tectonic boundary on the Tibetan Plateau, is widely recognized as the result of the Meso-Tethys Ocean closure. Magmatic arc rocks and porphyry Cu deposits adjacent to the BNS are clearly associated with oceanic lithosphere subduction; however, the debated subduction polarity remains a critical unresolved issue in reconstructing the Meso-Tethyan evolution. To better constrain the deep architecture beneath this critical suture zone, we conducted Pn-wave receiver function analysis using INDEPTH-III broadband seismic data, generating high-resolution crustal images along the BNS. Our seismic profiling reveals two significant structural characteristics: (1) systematic lateral discontinuities in intracrustal interfaces across the BNS, and (2) a distinctive Moho morphology characterized by a central upward arch (∼180 km width) with its southern and northern extensions reaching into the upper mantle. We interpret this arcuate Moho configuration as preserved remnants of Meso-Tethyan oceanic crust entrapped during terminal convergence between the Lhasa and Qiangtang Blocks. These findings provide unprecedented seismological evidence supporting a bidirectional subduction model, wherein the Meso-Tethyan oceanic lithosphere underwent bidirectional subduction prior to continental collision. This study offers new insights into the complex geodynamic processes associated with the closure of the Meso-Tethys Ocean and the subsequent Tibetan Plateau formation.</div></div>","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"914 ","pages":"Article 230903"},"PeriodicalIF":2.6,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144988942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
TectonophysicsPub Date : 2025-08-30DOI: 10.1016/j.tecto.2025.230895
Han Chen , Gaohua Zhu , Hongfeng Yang , Jiangyang Zhang , Shaopin Lu , Chuanxu Chen , Jian Lin , Yiming Luo
{"title":"Corrigendum to “Along-strike variations in intermediate-depth seismicity in the southernmost Mariana subduction zone: Impact from the subduction of an oceanic plateau” [Tectonophysics, Volume 913, 27 October 2025, 230875, https://doi.org/10.1016/j.tecto.2025.230875]","authors":"Han Chen , Gaohua Zhu , Hongfeng Yang , Jiangyang Zhang , Shaopin Lu , Chuanxu Chen , Jian Lin , Yiming Luo","doi":"10.1016/j.tecto.2025.230895","DOIUrl":"10.1016/j.tecto.2025.230895","url":null,"abstract":"","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"913 ","pages":"Article 230895"},"PeriodicalIF":2.6,"publicationDate":"2025-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145004049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The 2020 Qotur earthquake doublet and its implication for the geodynamics of Northwestern Iran","authors":"Abdolreza Ghods , Mahin Jafari , Jochen Braunmiller , Mahtab Aflaki , Eric Bergman , Zahra Mousavi , Esmaeil Farzaneghan , Andrea Walpersdorf","doi":"10.1016/j.tecto.2025.230899","DOIUrl":"10.1016/j.tecto.2025.230899","url":null,"abstract":"<div><div>The 23 February 2020 Qotur earthquake doublet (5.7 and 5.9 M<sub>w</sub>) occurred near the Iran-Turkey border. The doublet ruptured along the northern segment of the Bashkale fault system, which forms the northernmost end of the Zagros' Main Recent Fault. To investigate the tectonics of the region, we combined geological fault mapping, precise location of the seismic cluster, moment tensors of the mainshocks and 28 larger fore- and aftershocks, InSAR source modeling, and inversion of source parameters for the regional stress field. We show that both mainshocks happened on NE-SW trending left-lateral strike-slip faults belonging to the Bashkale fault system. However, both NE-SW trending left-lateral and NW-SE trending right-lateral strike-slip faults were activated by the earthquake cluster. The InSAR images imply no surface rupture for the doublet event in agreement with the field observations. The first mainshock was deeper (centroid: 9 km) than the second mainshock (5 km). We model the InSAR data of the second mainshock as rupture along a 7-km-wide and 5-km-long fault with maximum displacement of 1.2 m at ∼3 km depth. The spatial distribution of aftershocks and the damaged region implies southwest directivity for the second mainshock. Stress inversion of the moment tensors indicates a transtensional regime with an NNW-SSE direction of maximum horizontal stress. This agrees with the stress regime deduced from the inversion of geologically measured fault planes and GPS vectors, and the focal mechanism of the 1930 Salmas earthquake. Our results show that strain accommodation at the northern end of the right-lateral strike-slip Main Recent Fault of the Zagros is distributed across a complex network of immature conjugate right and left-lateral strike-slip and normal faults.</div></div>","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"914 ","pages":"Article 230899"},"PeriodicalIF":2.6,"publicationDate":"2025-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145004483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
TectonophysicsPub Date : 2025-08-28DOI: 10.1016/j.tecto.2025.230898
Asami Kimura , Akio Katsumata
{"title":"Crust and uppermost mantle structure beneath the Kinki district, Japan: Relationship to isolated deep low-frequency earthquakes","authors":"Asami Kimura , Akio Katsumata","doi":"10.1016/j.tecto.2025.230898","DOIUrl":"10.1016/j.tecto.2025.230898","url":null,"abstract":"<div><div>Occurrences of deep low-frequency earthquakes are observed in the regions away from volcanoes and the plate boundary in the Kinki district, Japan, and they are referred to as isolated intraplate LFEs. The activation mechanism of these LFEs is not fully understood yet. In this paper, we present the results of travel time tomography around the source areas of the isolated LFEs in the Kinki district. Our velocity model shows two types of velocity features, a low-velocity anomaly beneath the Wakayama earthquake swarm area and a high-velocity anomaly beneath Osaka Bay. Beneath Wakayama area, the low-velocity anomaly extends from the plate boundary to the LFE source area, and the isolated LFEs are located around the boundary of high and low velocity anomaly zones. This result suggests fluid flow from the subducting slab to the earthquake swarm area. In contrast, the uppermost mantle beneath Osaka Bay, where LFEs are also detected, shows a high-velocity anomaly. Our velocity model does not show any signs of fluid pathways from the uppermost mantle to the LFE source area, which were often recognized around volcanic regions in the previous studies. Horizontal fluid influx from surrounding areas or fluid pathways invisible in our model may exist. The high-velocity anomaly zone may represent a cooled melt reservoir formed by past magmatic activity such as Setouchi volcanic activities in the Miocene. Another possible interpretation of the LFE activity beneath Osaka Bay is that ancient magmatic fluids would have remained in the crust, and these fluids could cause the LFEs.</div></div>","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"914 ","pages":"Article 230898"},"PeriodicalIF":2.6,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144933326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
TectonophysicsPub Date : 2025-08-26DOI: 10.1016/j.tecto.2025.230897
Chunsen Li , Xiao Xu , Xiaoyu Guo , Bo Xiang , Zhanwu Lu , Xiaohui Liu , Xiaofei Tong
{"title":"Quantifying crustal stacking contribution to thickening of the eastern Northern Himalayan belt","authors":"Chunsen Li , Xiao Xu , Xiaoyu Guo , Bo Xiang , Zhanwu Lu , Xiaohui Liu , Xiaofei Tong","doi":"10.1016/j.tecto.2025.230897","DOIUrl":"10.1016/j.tecto.2025.230897","url":null,"abstract":"<div><div>The Indian continental crust beneath the Himalayan orogenic belt exhibits remarkable thickness (up to 78 km), approximately twice the global average for continental crust. However, its deep crustal structure and deformation mechanisms, such as distributed ductile flow versus high-intensity stacking, remain debated. This study deployed a 130 km-long, dense nodal array of short-period seismometers to investigate the crustal architecture of the eastern Northern Himalayan Belt. We applied the P-wave receiver function Common Conversion Point (CCP) stacking method to image fine crustal structures. Furthermore, we developed a neighborhood algorithm-based velocity inversion method that integrates the receiver functions with crustal H-κ parameters to derive the velocity structure. Our results reveal that the high-velocity Yardoi Dome within the mid-upper crust exhibits a short-wavelength, antiformal stacking style. The Main Himalayan Thrust (MHT) acts as a décollement, effectively decoupling the upper stacking system from the vertically thickening lower crust. We propose a hybrid crustal thickening model wherein mid-upper crustal thrust stacking dominantly contributes (approximately 70 %) to the total thickness. This is attributed to long-term thermal weakening along the Indian crustal front, where sustained high temperatures facilitated localized ductile shearing and upward crustal stacking. Critically, persistent orogenic thermal conditions preserve this ultra-thickened crust, offering a paradigm for continental thickening in collisional systems.</div></div>","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"913 ","pages":"Article 230897"},"PeriodicalIF":2.6,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144906897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
TectonophysicsPub Date : 2025-08-23DOI: 10.1016/j.tecto.2025.230896
Pu Niu , Jiangtao Han , Guoqing Ma , Zhiwen Zeng
{"title":"Revealing deep heat transfer characteristics of the Yalu River Basin using joint magnetotelluric and gravity inversion","authors":"Pu Niu , Jiangtao Han , Guoqing Ma , Zhiwen Zeng","doi":"10.1016/j.tecto.2025.230896","DOIUrl":"10.1016/j.tecto.2025.230896","url":null,"abstract":"<div><div>The Yalu River Basin (YRB), located in northeastern China, lies along the western margin of the Changbaishan volcanic system and hosts the intraplate monogenetic Longgang volcanic. To investigate the deep heat transfer mechanisms of the geothermal systems in this region, we performed sequential joint inversion of magnetotelluric (MT) data from 110 sites and gravity data collected in a grid-based layout. The resulting 3D resistivity and density models reveal a pronounced structural contrast across the Yalu River Fault (YRF). North of the YRF, in the Longgang block, the middle-to-lower crust exhibits both low-resistivity and high-density, consistent with the presence of mantle-derived magmatic intrusions. In the upper crust, a dual-reservoir structure composed of shallow limestone and deeper granitic formations with high-resistivity characteristics. In contrast, the crust of the Helong block, located on the northern side of the YRF, shows high-resistivity and low-density, primarily attributed to granitic intrusions.</div><div>These structural differences indicate two distinct modes of heat transfer. In the Longgang block, the crust is relatively ductile and has experienced significant deformation due to the subduction of the Pacific Plate. This setting facilitates the rapid ascent of deep magmas and enables trans-lithospheric heat transport. In the Helong block, by contrast, the crust is mechanically stronger and less deformed, limiting the vertical migration of magma. Here, heat is primarily generated by radiogenic decay within granitic intrusions, which warms meteoric water stored in fractured reservoirs, resulting in surface thermal anomalies and forming a crustal-circulation-based heat transfer model. These contrasting mechanisms highlight the influence of crustal deformation and tectonic setting on the development of geothermal systems in intraplate volcanic regions.</div></div>","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"913 ","pages":"Article 230896"},"PeriodicalIF":2.6,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144913084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
TectonophysicsPub Date : 2025-08-22DOI: 10.1016/j.tecto.2025.230894
Xin Sun , Yanxiu Shao , Wenjun Zheng , Dongli Zhang , Haiyun Bi , Jinhua Du
{"title":"Paleoearthquake sequence in the eastern segment of the Serteng Shan frontal fault (Hetao graben, North China) during the last 50 ka","authors":"Xin Sun , Yanxiu Shao , Wenjun Zheng , Dongli Zhang , Haiyun Bi , Jinhua Du","doi":"10.1016/j.tecto.2025.230894","DOIUrl":"10.1016/j.tecto.2025.230894","url":null,"abstract":"<div><div>To better constrain the paleoseismicity and assess the seismic hazard, we investigated the eastern segment of the Serteng Shan frontal fault along the northern margin of the Ordos Block. The Ordos Block in northern China has a stable interior but is surrounded by seismically active faults. Several historical earthquakes with magnitude ≥<em>M</em>7 have ruptured along the northern boundary of the Ordos Block. Using excavated trenches, the eastern segment of the Serteng Shan frontal fault along the northern margin of the Ordos Block was investigated. Seven events were identified based on distinct geological markers, such as colluvial wedges. To constrain the timing of these events, 28 samples were collected and dated using the optically stimulated luminescence (OSL) method. The dating indicates show that all seven events occurred after ∼90 ka, with the five most recent events occurring after 50 ka. Based on OxCal modeling results, the most recent event is inferred to have occurred at 7.0 ± 1.1 ka. The penultimate and preceding events occurred at approximately 25.0 ± 2.2 ka, 35.6 ± 1.5 ka, 41.3 ± 1.9 ka, and 46.2 ± 2.4 ka, respectively. The minimum recurrence intervals are approximately 5 ka, or multiples thereof, resulting in longer intervals of up to ∼20 ka. Combining the displacement of the T6 terrace and their corresponding ages, a uniform vertical slip rate of 0.15 ± 0.02 mm/yr over the last 90 ka is estimated. The slip rates and recurrence intervals indicate that the eastern segment of the Serteng Shan fault experiences a low rate of surface-rupturing earthquakes. This behavior could be explained by the effect of unloading of a mega-paleolake in the Hetao Basin at ∼50 ka. These results provide new constraints on long-term slip behavior and inform seismic hazard assessment.</div></div>","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"913 ","pages":"Article 230894"},"PeriodicalIF":2.6,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144893151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"3D gravity modelling of the basement of the Mitidja Basin (Algeria): Approach and tectonic implications","authors":"Rafik Yalaoui , Reda Ouyed , Mouloud Idres , Saddek Samai , Merzouk Ouyed","doi":"10.1016/j.tecto.2025.230892","DOIUrl":"10.1016/j.tecto.2025.230892","url":null,"abstract":"<div><div>The modelling of the morphology and depth of the basement of sedimentary basins is essential for various geological and geophysical investigations, including tectonic analysis, hydrogeological studies, and seismic hazard assessment. In this study, a three-step approach was applied to model the crystalline basement of the Mitidja Basin (Algeria) in the absence of borehole or seismic data.</div><div>This approach combines energy spectrum analysis to identify characteristic gravity frequencies, optimisation of gravity anomalies from outcrop zones, and 3D inversion based on the Parker-Oldenburg algorithm. It enabled the mapping of the crystalline basement of the Mitidja Basin for the first time, revealing a complex structure influenced by two transverse faults associated with regional tectonics. These dextral and sinistral faults play a key role in the deformation and segmentation of the reverse fault systems that bound the Mitidja Basin to the north and south, a dynamic corroborated by focal mechanisms of recent earthquakes.</div><div>The resulting map highlights two distinct parts of the basin, separated by basement uplift in the centre. The observed correlation between the crystalline and Plaisancian basements suggests significant hydraulic potential in areas not covered by geo-electrical surveys, where borehole data could provide confirmation.</div><div>This study also emphasises the importance of further seismo-tectonic research in this region, particularly around Algiers, to improve seismic hazard assessment and water resource management.</div></div>","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"913 ","pages":"Article 230892"},"PeriodicalIF":2.6,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144896378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
TectonophysicsPub Date : 2025-08-21DOI: 10.1016/j.tecto.2025.230893
Francisco J. Rubio Pascual , Luis M. Martín Parra , Jerónimo Matas , L. Roberto Rodríguez Fernández , Luis González Menéndez , Diana Moreno-Martín , Rubén Díez Fernández
{"title":"An Upper Devonian foredeep basin in the Southern Central Iberian Zone (Variscan Iberian Massif): Consequences for Variscan plate dynamics","authors":"Francisco J. Rubio Pascual , Luis M. Martín Parra , Jerónimo Matas , L. Roberto Rodríguez Fernández , Luis González Menéndez , Diana Moreno-Martín , Rubén Díez Fernández","doi":"10.1016/j.tecto.2025.230893","DOIUrl":"10.1016/j.tecto.2025.230893","url":null,"abstract":"<div><div>New field research and revision of previous works in the Variscan Iberian Massif unravel the existence of an Upper Devonian foredeep basin in the southern Central Iberian Zone, close to the suture area with the Ossa-Morena Zone. Superimposed Tournaisian-Visean extensional basins, a Serpukhovian-Bashkirian foreland basin, and the Late Variscan wrench tectonics obscure this foredeep basin. This synorogenic sedimentation is related to the Late Devonian continental subduction featured by a high-pressure metamorphic belt exposed to the south of this area. The unravelling of this trough with marine turbiditic sedimentation and fragments of terrestrial plant fossils, allows the reinterpretation of the Upper Devonian deposits along the northern half of the Iberian Massif. It also explains the lack of Middle Devonian sedimentary rocks in most of the massif. The geometry and stratigraphy correspond to a collisional foreland basin with its classical depozonal elements. The structure of the foreland basin solves discussions about tectonic polarity in the Ossa-Morena - Central Iberian Variscan collision, the upper plate thus corresponds to the Upper Allochthon of the Ossa-Morena Zone. The tracking of the NE migration (current coordinates) of the bulge area suggests a ∼ 5.5 cm/yr rate of Upper Devonian convergence and up to ∼800 km of continental underplating. We also propose a correlation with the Upper Devonian high-pressure Basal Units and the synorogenic sediments of the NW Iberian Massif. Conclusions can be extended to the plate architecture between other peri-Gondwana terranes of the Armorican assemblage and the northern Gondwana margin.</div></div>","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"913 ","pages":"Article 230893"},"PeriodicalIF":2.6,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144893150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}