Tectonophysics最新文献_第6页

Asperity dynamics and secondary damage development during the closure of a fracture in granite 花岗岩裂缝闭合过程中的粗度动力学和次生损伤发育

IF 2.6 3区地球科学

Tectonophysics Pub Date : 2026-02-06 Epub Date: 2025-12-19 DOI: 10.1016/j.tecto.2025.231044

Jessica McBeck , Benoît Cordonnier , François Renard

{"title":"Asperity dynamics and secondary damage development during the closure of a fracture in granite","authors":"Jessica McBeck , Benoît Cordonnier , François Renard","doi":"10.1016/j.tecto.2025.231044","DOIUrl":"10.1016/j.tecto.2025.231044","url":null,"abstract":"<div><div>The dynamics of asperities and the resulting real contact area play an important role in the evolving frictional strength of fault zones, particularly during the interseismic period. The aperture of fractures controls the ability of fluids to traverse meaningful distances in geologically and industrially relevant timescales. Here, we show the evolution of the real contact area and aperture at increasing normal load in a triaxial compression experiment with X-ray tomography on a Westerly granite rock core with a preexisting core-spanning fracture oriented perpendicular to the maximum compressive principal stress direction, at a confining pressure of 15 MPa and fluid pressure of water of 10 MPa. At the onset of normal loading, the real contact area increases linearly with the differential stress, at a rate of about 0.2 %/MPa until the real contact area is 20 %, mostly though the accumulation of greater numbers of individual contacts, consistent with elastic deformation. Then the real contact area increases more rapidly with load, with increasing areas of individual contacts, consistent with plastic deformation. The real contact area reaches maximum values of 35 %, and then declines with increasing loading as secondary axial fractures propagate from the large sub-horizontal fracture. The average mechanical aperture first declines rapidly with loading, reaches a minimum value of 13 μm, and then increases before failure as secondary axial fractures develop. The rough sub-horizontal fracture and secondary axial fractures produce a long-lived zone of elevated porosity, which is 4 % above the background porosity (1–2 %) just before failure. Thus, a closing rough fracture can provide a conduit for fluid flow due to non-zero aperture and the production of secondary damage.</div></div>","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"921 ","pages":"Article 231044"},"PeriodicalIF":2.6,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145785278","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}

引用次数: 0

Distinct destruction mechanism in the North China Craton: Insight from high-resolution thermochemical structure 华北克拉通独特的破坏机制：来自高分辨率热化学结构的洞察

IF 2.6 3区地球科学

Tectonophysics Pub Date : 2026-02-06 Epub Date: 2025-12-18 DOI: 10.1016/j.tecto.2025.231042

Xiaoyu Yang , Yonghua Li , Juan Carlos Afonso

{"title":"Distinct destruction mechanism in the North China Craton: Insight from high-resolution thermochemical structure","authors":"Xiaoyu Yang , Yonghua Li , Juan Carlos Afonso","doi":"10.1016/j.tecto.2025.231042","DOIUrl":"10.1016/j.tecto.2025.231042","url":null,"abstract":"<div><div>Despite numerous studies on the thinning and destruction of the lithospheric mantle root beneath the North China Craton (NCC), the mechanisms for modification from refractory mantle of ancient craton to the fertile one remains poorly understood due to insufficient information of deep thermochemical structure. We investigate the mantle compositional and thermal structure of the NCC by jointly inverting Rayleigh wave dispersion, geoid height, elevation and surface heat flow (SHF) using a probabilistic inversion. We image significant differences in the thermochemical structure of lithosphere in the different blocks of the NCC. The lithospheric structure of the western North China Craton (WNCC) is dominated by relatively thick lithospheric roots (>150 km) and depleted composition (Mg# ∼90–92), supporting the idea of the core of the WNCC is well-preserved. We observe a relatively thinner lithosphere (<100 km) and more fertile signature in the central and eastern NCC, confirming that these areas have undergone lithospheric thinning and modification. We reveal the distinct lithospheric composition in the central and eastern NCC, indicating the difference of mechanisms of lithospheric reactivation. The low Mg# (Mg# ∼88.5–90) of the lithospheric mantle beneath the eastern North China Craton (ENCC) imply that the cratonic root were delaminated and replaced by a new fertile mantle. The coexistence of depleted and fertile mantle (Mg# ∼88.5–91.5) beneath the central NCC, implying that the depleted cratonic mantle partially evolved to fertile one through injection of melts/fluids originating from the asthenospheric mantle.</div></div>","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"921 ","pages":"Article 231042"},"PeriodicalIF":2.6,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145785279","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}

引用次数: 0

Insights into the 2021 Arkalochori (Crete Island, southern Greece) foreshock swarm through an enhanced deep-learning seismic catalog 通过增强的深度学习地震目录，深入了解2021年Arkalochori（希腊南部克里特岛）前震群

IF 2.6 3区地球科学

Tectonophysics Pub Date : 2026-02-06 Epub Date: 2025-12-19 DOI: 10.1016/j.tecto.2025.231045

Filippos Vallianatos , Vasilis Kapetanidis , Georgios Michas , Andreas Karakonstantis

{"title":"Insights into the 2021 Arkalochori (Crete Island, southern Greece) foreshock swarm through an enhanced deep-learning seismic catalog","authors":"Filippos Vallianatos , Vasilis Kapetanidis , Georgios Michas , Andreas Karakonstantis","doi":"10.1016/j.tecto.2025.231045","DOIUrl":"10.1016/j.tecto.2025.231045","url":null,"abstract":"<div><div>On 27 September 2021, a damaging earthquake of <em>M</em><sub>w</sub>6.0 struck central Crete (Greece), close to Arkalochori village; the strongest earthquake ever recorded in this area during the instrumental period. Remarkably, the mainshock was preceded by an intense foreshock swarm that lasted almost four months. However, the lack of local seismological stations severely limited the event-detection capability of conventional methods, rendering an in-depth analysis of the foreshocks' evolution and statistical properties unfeasible. To enrich the seismic catalog, we employed a deep-learning model to detect and pick additional seismic phases automatically. A Bayesian Gaussian Mixture Model was then applied to associate the acquired P- and S-wave picks with specific event origins, followed by single-event location with a local 1D velocity model and double-difference relocation. A new, deep-learning catalog was constructed, with about ten times more events than in the previously published seismic catalogs. The evolution of the swarm presented a complex spatiotemporal pattern, with patches activated at different times. A major <em>M</em><sub>w</sub>4.9 foreshock occurred on 24 July 2021, triggering its own sub-sequence. In addition, the <em>b</em>-value spatiotemporal variations were investigated as possible stress state indicators in the seismogenic area. The analysis revealed persistent lower <em>b</em>-values than the background during the foreshock swarm, with the lowest just before the occurrence of the major <em>M</em><sub>w</sub>4.9 foreshock. Furthermore, the <em>b</em>-values spatial distribution highlighted that both the <em>M</em><sub>w</sub>4.9 foreshock and the <em>M</em><sub>w</sub>6.0 mainshock occurred in low <em>b</em>-value zones, suggesting an increased likelihood of occurrence and a critical accumulation of stress in the epicentral areas of the strongest events.</div></div>","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"921 ","pages":"Article 231045"},"PeriodicalIF":2.6,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145785281","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}

引用次数: 0

Gravity-derived crustal thickness heterogeneity in the Philippine Archipelago: Implications for a new microplate framework 菲律宾群岛重力衍生的地壳厚度非均质性：一个新的微板块框架的含义

IF 2.6 3区地球科学

Tectonophysics Pub Date : 2026-02-06 Epub Date: 2025-12-26 DOI: 10.1016/j.tecto.2025.231059

Liang Jin , Jie Liu , Sanzhong Li , Yanhui Suo , Pengcheng Wang , Junjiang Zhu

{"title":"Gravity-derived crustal thickness heterogeneity in the Philippine Archipelago: Implications for a new microplate framework","authors":"Liang Jin , Jie Liu , Sanzhong Li , Yanhui Suo , Pengcheng Wang , Junjiang Zhu","doi":"10.1016/j.tecto.2025.231059","DOIUrl":"10.1016/j.tecto.2025.231059","url":null,"abstract":"<div><div>Located in the collision zone between the Eurasian and Philippine Sea plates, the Philippine Mobile Belt (PMB), with intense earthquakes and volcanism, is a typical area for the study of plate subduction, island arc accretion, and microplate amalgamation. However, due to the complexity of tectonic history of this region, the existing studies are still deficient in understanding the crustal structure and deep dynamics. To address this, we develop a new improved crustal thickness model for the Philippine Archipelago using EIGEN-6C4 gravity data and advanced inversion methodology. Integration of microplate boundary kinematics and active fault systems permits division of the PMB into nine discrete microplates. Our study shows that pronounced isostatic disequilibrium along the Manila Trench, Philippine Trench, and Philippine Fault, indicating active lithospheric adjustment. The crustal thickness of the PMB shows significant spatial heterogeneity, revealing the existence of anomalous crustal thickening spatially correlated with volcanic chains flanking the main Philippine Fault Zone. We propose a dual-mechanism crustal thickening model driven by both multi-stage accretionary processes and deep magma underplating, offering new insights into the crust-mantle interactions governing the Philippine orogenic system and microplate geodynamics.</div></div>","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"921 ","pages":"Article 231059"},"PeriodicalIF":2.6,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145845307","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}

引用次数: 0

Deep electrical structure and thermodynamic mechanism of the high-temperature geothermal field in Kangding, Western Sichuan, China 川西康定高温地热田深部电性结构及热力机制

IF 2.6 3区地球科学

Tectonophysics Pub Date : 2026-02-06 Epub Date: 2025-12-24 DOI: 10.1016/j.tecto.2025.231055

Gang Zhang , Yongjie Tang , Xuben Wang , Yu Ma , Yushu Tang , Chao Zhang

{"title":"Deep electrical structure and thermodynamic mechanism of the high-temperature geothermal field in Kangding, Western Sichuan, China","authors":"Gang Zhang , Yongjie Tang , Xuben Wang , Yu Ma , Yushu Tang , Chao Zhang","doi":"10.1016/j.tecto.2025.231055","DOIUrl":"10.1016/j.tecto.2025.231055","url":null,"abstract":"<div><div>The Kangding geothermal field in western China, despite abundant high-temperature resources, has low utilization (<8 %) due to unclear deep genesis models. This study used magnetotelluric (MT) data from 30 stations along a 140 km profile, combined with 3D inversion, to build a deep electrical conductivity model. By integrating electrical conductivity-temperature relationships and heat conduction equations, it further developed thermal structure and rock partial melting models. The study also analyzed crustal heat flow, Moho depth, and tectonic dynamics to explore deep thermo-tectonic mechanisms. Key findings include: (1) A “high-low-high” crustal electrical structure with low-resistivity zones (20–50 km depth) indicating eastward crustal flow; (2) High temperatures (>850 °C), water content (1–7 wt%), and partial melting (1–10 %, up to >10 % in core areas) as major heat sources; (3) The Xianshuihe Fault as a deep-seated fracture enabling strike-slip heat generation and fluid transfer; (4) A geothermal system integrating mid-lower crustal heat, fault friction, and precipitation recharge. These insights enhance understanding of Kangding's geothermal activity, supporting improved resource assessment. Acknowledging parameter limitations, this study adopted a geophysically validated conductivity-temperature method, which may cause minor model-prediction discrepancies compared to actual conditions.</div></div>","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"921 ","pages":"Article 231055"},"PeriodicalIF":2.6,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145823481","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}

引用次数: 0

Complex seismic anisotropy beneath the North China Craton from long-term shear wave splitting analysis 华北克拉通地下复杂地震各向异性的长期横波分裂分析

IF 2.6 3区地球科学

Tectonophysics Pub Date : 2026-01-27 Epub Date: 2025-11-30 DOI: 10.1016/j.tecto.2025.231031

Wen Meng , Yonghua Li , Xiaoyu Yang

{"title":"Complex seismic anisotropy beneath the North China Craton from long-term shear wave splitting analysis","authors":"Wen Meng , Yonghua Li , Xiaoyu Yang","doi":"10.1016/j.tecto.2025.231031","DOIUrl":"10.1016/j.tecto.2025.231031","url":null,"abstract":"<div><div>We investigate a contrast in the anisotropic complexity beneath different blocks of the North China Craton (NCC) using shear wave splitting measurements from teleseismic SKS, SKKS, and PKS phases recorded at 113 permanent stations over fifteen years. The systematic variations of splitting parameters with back azimuth observed at stations across various blocks have been modeled using two-layers anisotropic structure. The observed ENE-WSW-oriented fast polarization direction (FPD) in the upper layer beneath the Ordos Block is interpreted as frozen-in lithospheric anisotropy, likely inherited during cratonic formation. The FPD of the upper layer across the Circum-Ordos Rifts is consistent with the rift strike, which may be the result of a combined effect of pre-rift orogenic-related lithospheric fabric, oriented melt pockets or/and simple shear deformation associated with the counterclockwise rotation of the Ordos Block. The FPD in the upper layer beneath the Taihang Orogenic Belt is consistent with the strike of the orogenic belt, suggesting a possible association with past lithospheric orogenic deformation. In the lower layers of all regions modeled with two-layers anisotropic structure, FPDs are consistent with the direction of absolute plate motion (APM), reflecting the flow in the asthenosphere. However, in regions where the lithospheric thickness changes rapidly, such as along the margins of the Ordos Block and around the Datong Volcanic area, there are significant directional deviations between FPDs and APM. This suggests that lithospheric heterogeneity and upwelling mantle flow have a significant modulating effect on the asthenospheric flow.</div></div>","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"920 ","pages":"Article 231031"},"PeriodicalIF":2.6,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145650854","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}

引用次数: 0

The aggregation-diffusion effect of shallow motions in the 2022 Menyuan Mw 6.6 earthquake 2022年门源Mw 6.6地震浅层运动的聚集-扩散效应

IF 2.6 3区地球科学

Tectonophysics Pub Date : 2026-01-27 Epub Date: 2025-12-02 DOI: 10.1016/j.tecto.2025.231033

Anhua Ju , Haiqing Yang , Xingyue Li , Lixin Peng

{"title":"The aggregation-diffusion effect of shallow motions in the 2022 Menyuan Mw 6.6 earthquake","authors":"Anhua Ju , Haiqing Yang , Xingyue Li , Lixin Peng","doi":"10.1016/j.tecto.2025.231033","DOIUrl":"10.1016/j.tecto.2025.231033","url":null,"abstract":"<div><div>The dynamic processes of the Earth's surface before and after an earthquake have long been central to seismological research. However, the relationship between surface motions and seismic activity remains difficult to establish. This study proposes a novel method for quantifying the orderliness of surface motions. The method defines trend direction at each time step based on the three-dimensional displacement time series derived from Sentinel-1 SAR images from different orbits. It also describes the aggregation and diffusion effects of motion directions before and after the earthquake. Additionally, a horizontal displacement acceleration-deceleration detection model based on piecewise linear fitting identifies monthly acceleration and deceleration points throughout the seismic event. The results showed that the observable horizontal displacement was significantly larger than the vertical displacement, exhibiting the strike-slip faulting characteristics of the 2022 Mw 6.6 Menyuan earthquake. The average information entropy was 6.088 before the earthquake, dropped to 5.943 near the event, and rose to 6.067 afterward. Surface motion direction and amplitude exhibit a process of aggregation and acceleration followed by diffusion and deceleration. This indicates that geodetic techniques can detect subtle surface motion changes potentially linked to seismic preparation processes.</div></div>","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"920 ","pages":"Article 231033"},"PeriodicalIF":2.6,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145658139","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}

引用次数: 0

Complex nature of the crustal anisotropy in the western margin of the Indian subcontinent and its geodynamic implications 印度次大陆西缘地壳各向异性的复杂性及其地球动力学意义

IF 2.6 3区地球科学

Tectonophysics Pub Date : 2026-01-27 Epub Date: 2025-12-11 DOI: 10.1016/j.tecto.2025.231039

Sowrav Saikia , Rakesh Prajapat , Sumer Chopra , Santosh Kumar , Vinay Kumar Dwivedi , Vikas Kumar

{"title":"Complex nature of the crustal anisotropy in the western margin of the Indian subcontinent and its geodynamic implications","authors":"Sowrav Saikia , Rakesh Prajapat , Sumer Chopra , Santosh Kumar , Vinay Kumar Dwivedi , Vikas Kumar","doi":"10.1016/j.tecto.2025.231039","DOIUrl":"10.1016/j.tecto.2025.231039","url":null,"abstract":"<div><div>The intraplate Gujarat region has thick crust which is undergoing deformation. Although the deformation process in the region is evident in the surface geological process, understanding the deeper geodynamic mechanism requires geophysical investigations. The crustal anisotropy can throw light on the nature of deformation of the crust and its geodynamic implications on overall tectonics of the region. This present study analyze the spatio-temporal variations of crustal anisotropy using teleseismic earthquakes recorded at 56 permanent stations and 20 temporary stations of the Gujarat State seismic network. The primary findings of 1306 pairs of radial and tangential components Pms phase splitting shows spatial variations in fast directions, aligned with major tectonic features and rest of some are aligned with absolute plate motion of Indian plate. The strength of the anisotropy is found to be low to average (average δt ∼ 0.10–0.45 s), suggesting the low deformations of the crust. The measurements of crustal anisotropy parameters indicate that anisotropy is attributed to the localized active faults, rather than affected by lower crust materials or horizontal compressive stress orientation. From the aligned/parallel trends of fast polarization direction (FPDs) of crustal anisotropy with the strike of active faults, the structure induced anisotropy is the primary cause of crustal anisotropy in Gujarat intraplate region.</div></div>","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"920 ","pages":"Article 231039"},"PeriodicalIF":2.6,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145731864","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}

引用次数: 0

Mechanism and Co-seismic effects of the 2023 herat earthquake sequence in Afghanistan based on InSAR 基于InSAR的2023年阿富汗特大地震序列机制及同震效应

IF 2.6 3区地球科学

Tectonophysics Pub Date : 2026-01-27 Epub Date: 2025-12-08 DOI: 10.1016/j.tecto.2025.231038

Yuchao Zhong , Hua Gao , Hui Lin , Guangcai Feng

{"title":"Mechanism and Co-seismic effects of the 2023 herat earthquake sequence in Afghanistan based on InSAR","authors":"Yuchao Zhong , Hua Gao , Hui Lin , Guangcai Feng","doi":"10.1016/j.tecto.2025.231038","DOIUrl":"10.1016/j.tecto.2025.231038","url":null,"abstract":"<div><div>The October 2023 Herat earthquake sequence in western Afghanistan, involving four Mw 6.3 events, ranks among the most catastrophic seismic crises in the region over the past two decades, resulting in over 2000 fatalities and widespread structural collapse. This study integrates radar remote sensing technologies to investigate the focal mechanism and co-seismic impacts of this sequence. Firstly, co-seismic deformation was extracted from Sentinel-1 SAR images using Differential Interferometric Synthetic Aperture Radar (DInSAR) method. Then the Okada model was employed to invert fault geometry parameters and slip distribution. Furthermore, multi-temporal InSAR coherence analysis was performed to assess building damage, with a focus in critical zones such as Herat City and proximal villages. For the first two Mw 6.3 events, the ascending and descending deformation data reveal maximum of 33 cm and 54 cm in LOS direction, respectively. For the latter two Mw 6.3 events, the maximum are 58 cm and 76 cm. Through slip inversion, two distinct asperities were identified for the first two Mw 6.3 events (at depths of 5 km and 6 km) and another two for the latter two Mw 6.3 events (at depths of 6 km and 7 km, respectively). Fault model suggests that a concealed north-dipping fault between the Hari Rud and Siakhubulak fault zones imposes significant Coulomb stress perturbations on adjacent fault systems. Coherence analysis mapped severe damage in 12 villages near the epicenter, while collapsed structures in Herat City showed characteristic coherence difference values of 0.2–0.4. This study delivers co-seismic data for the Herat earthquake sequence, highlighting the seismic hazard in the future, quantified coherence difference provides a rapid proxy method for post-disaster building damage assessment, contribute to reconstruction in northwestern Afghanistan.</div></div>","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"920 ","pages":"Article 231038"},"PeriodicalIF":2.6,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145731866","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}

引用次数: 0

Exhumation history of the eastern Tethyan Himalaya: Evidence from Apatite (UTh)/He Thermochronology 特提斯喜马拉雅东部的发掘史：来自磷灰石(U - Th)/He热年代学的证据

IF 2.6 3区地球科学

Tectonophysics Pub Date : 2026-01-27 Epub Date: 2025-12-05 DOI: 10.1016/j.tecto.2025.231035

Xu Han, Jin-Gen Dai, Bo-Rong Liu, Zhi-Cheng Yu

{"title":"Exhumation history of the eastern Tethyan Himalaya: Evidence from Apatite (UTh)/He Thermochronology","authors":"Xu Han, Jin-Gen Dai, Bo-Rong Liu, Zhi-Cheng Yu","doi":"10.1016/j.tecto.2025.231035","DOIUrl":"10.1016/j.tecto.2025.231035","url":null,"abstract":"<div><div>The Himalayan orogen is an ideal natural laboratory for investigating exhumation processes due to the diverse and distinctive tectonic and climatic features. Whereas numerous low-temperature thermochronometric studies have been conducted on southern flank of the orogen (mainly in the Greater Himalaya and Lesser Himalaya), the dominant controls on exhumation remain debated due to the complex interactions between climate, topography, and tectonics. In contrast, the Tethyan Himalaya along the northern flank exhibits relatively limited recent tectonic activity and spatially uniform precipitation, which makes it more suitable for exploring controlling factors of exhumation. To reconstruct the exhumation history of the eastern Tethyan Himalaya and identify its controls, we collected bedrock samples along river channels for apatite (U<img>Th)/He dating. Low-temperature thermochronology and thermal history modeling indicate three rapid exhumation phases: ca. 10–7 Ma, ca. 6–3 Ma, and ca. 2–0 Ma. The ca. 10–7 Ma phase correlates with the Asian summer monsoon intensification, during which increased precipitation enhanced fluvial incision. The ca. 6–3 Ma phase is the last vestige of tectonically controlled rapid exhumation in Himalaya, subsequent to the decline of the India-Asia convergence rate at ca. 6 Ma. The most recent phase (<2 Ma) is primarily linked to localized normal faulting. Additionally, a pronounced geomorphic contrast is observed: river valleys south of the Himalayan drainage divide exhibit significantly wider widths compared to tributaries of the upper and lower Yarlung River located north of the divide. These differences correlate with exhumation timing, as areas experiencing older exhumation phases exhibit wider valleys. This correlation suggests that fluvial erosion exerts a long-term control on exhumation patterns within the orogen.</div></div>","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"920 ","pages":"Article 231035"},"PeriodicalIF":2.6,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145689914","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}

引用次数: 0