Journal of Structural Geology最新文献

{"title":"Characteristics and modelling of slip-rate variability and temporal earthquake clustering across a distributed network of active normal faults constrained by in situ 36Cl cosmogenic dating of fault scarp exhumation, central Italy","authors":"Roberts G.P ,&nbsp;Iezzi F ,&nbsp;Sgambato C ,&nbsp;Robertson J ,&nbsp;Beck J ,&nbsp;Mildon Z.K ,&nbsp;Papanikolaou I ,&nbsp;Michetti A.M ,&nbsp;Faure Walker J.P ,&nbsp;Mitchell S ,&nbsp;Meschis M ,&nbsp;Shanks R ,&nbsp;Phillips R ,&nbsp;McCaffrey K.J.W ,&nbsp;Vittori E ,&nbsp;Visini F ,&nbsp;Iqbal M","doi":"10.1016/j.jsg.2025.105391","DOIUrl":"10.1016/j.jsg.2025.105391","url":null,"abstract":"<div><div>We present a compilation of new and unpublished <em>in situ</em> ³⁶Cl cosmogenic isotope data recording the exhumation of 27 active normal fault planes by earthquake slip for the central Apennines, Italy. We do this to constrain the characteristics of slip-rate variability and temporal earthquake clustering and anticlustering across the entire extending orogen, and to assess why it occurs. From the ³⁶Cl observations we report(1) the long-term slip-rates averaged since 20 ka, (2) the percentage of sites with clusters and anticlusters in each 1 kyrs time-slice back to 20 ka, (3) regional maps showing cluster locations for every 1 kyr time-slice, (4) cluster and anticluster durations, and (5) the amounts of slip and slip-rates averaged over the duration of clusters and anticlusters. To study why this slip-rate variability has developed we conduct modelling of stress interactions between faults and underlying shear-zones, and between neighbouring fault/shear-zone structures. We show that the measured slip-rate variability and temporal clustering can be replicated by a model where the transfer of differential stress between faults and their underlying shear-zones, and between neighbouring fault/shear-zone structures, produces changes in strain-rates on underlying viscous shear-zones which drive periods of rapid or reduced slip-rate on their overlying faults. We suggest that stress and hence strain-rate increase on an underlying shear-zone produced by coseismic slip on its overlying fault is the mechanism that initiates an earthquake cluster. Clusters progress because the increased strain-rate on the shear-zone reloads the overlying fault producing a positive feedback loop. The clusters also produce stress reduction on fault/shear-zones located across strike, initiating anticlusters in those locations. The durations of anticlusters will be set by the summed coseismic and interseismic stress changes through time, because although these shear-zones develop relatively low viscous strain-rates, eventually they will load their overlying fault to failure initiating a new cluster. These interactions cause the locations of clusters and anticlusters to migrate across and along-strike within the fault system. Such constraints on the processes producing clustering and anticlustering should allow observations of these phenomena to be included in probabilistic seismic hazard assessments (PSHA), and interpretations of the rheology of deforming continental crust.</div></div>","PeriodicalId":50035,"journal":{"name":"Journal of Structural Geology","volume":"195 ","pages":"Article 105391"},"PeriodicalIF":2.6,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143579915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 3D model and growth pattern of the Longquan Shan fault zone in Sichuan basin, China: Implications for the potential earthquake rupture patterns","authors":"Fang Xu ,&nbsp;Renqi Lu ,&nbsp;Peng Su ,&nbsp;Yann Klinger ,&nbsp;Jinyu Zhang ,&nbsp;Yiduo Liu ,&nbsp;Guanshen Liu","doi":"10.1016/j.jsg.2025.105388","DOIUrl":"10.1016/j.jsg.2025.105388","url":null,"abstract":"<div><div>The fault three-dimensional (3D) structure and growth pattern are fundamental features of an active fault, which provide basic parameters for seismic hazard analysis. The Longquan Shan Fault Zone (LQFZ) is a major active fault, stretching for 200 km in the Sichuan Basin, southwestern China. In this study, we obtain a new, detailed 3D structure model of the LQFZ based on 43 high-resolution seismic reflection profiles. We further quantify the fault heave distribution along the entire LQFZ to understand its growth pattern. We find that the LQFZ contains four major thrust faults and a shallow detachment layer. We obtain 106 displacement values from the seismic profiles and 1963 heave values from the 3D structure model. The heave distribution of the LQFZ contains multiple peaks, indicating that the LQFZ is formed through the linkage of multiple fault segments. The cumulative heave profile of the four faults seems like an isolation fault, which implies the LQFZ has grown coherently since its formation. The maximum displacement and fault length of the four thrust faults show a linear scaling relation, suggesting that the faults grow in a self-similar manner. We also analyze the potential earthquakes on the LQFZ based on the 3D fault model and the fault growth pattern.</div></div>","PeriodicalId":50035,"journal":{"name":"Journal of Structural Geology","volume":"195 ","pages":"Article 105388"},"PeriodicalIF":2.6,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143563686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of linking damage zones of geological faults through numerical modeling","authors":"Karoline Nunes ,&nbsp;Roberto Quevedo ,&nbsp;Deane Roehl ,&nbsp;Bruno R.B.M. Carvalho","doi":"10.1016/j.jsg.2025.105381","DOIUrl":"10.1016/j.jsg.2025.105381","url":null,"abstract":"<div><div>Assessing damage zones is essential to support strategic decisions that ensure operational efficiency and the safety of exploration and production activities in the oil and gas industry. This study presents a numerical methodology based on the finite element method with rock elastoplastic behavior for predicting the linkage and interaction of damage zones triggered by one, two or more faults at the pre-salt level. First, we use conceptual models to assess the deformation mechanisms in linking damage zones and analyze how the choice of the constitutive model and the relative distances between two faults affect the damage zone prediction. The results show the relative position given by the separation and the overlapping of two faults determine whether extensional or contractional mechanisms form. Furthermore, the analysis must consider more comprehensive models capable of simulating shear compaction for the latter. Then, we applied the methodology in a case study in a pre-salt field aiming to assess interaction damage zones. Seismic data provides the geometry of horizons and fault surfaces while well data brings the type of deformation structures present in fault damage zones. The numerical results indicate the formation of extensional interaction damage zones resulting from a sinistral strike-slip combined with the normal movement of faults. Well data corroborate this finding by indicating the presence of hydraulic breccias. The analysis of both conceptual models and the case study demonstrates that the proposed methodology can be used with industry data to predict the formation of damage zones.</div></div>","PeriodicalId":50035,"journal":{"name":"Journal of Structural Geology","volume":"195 ","pages":"Article 105381"},"PeriodicalIF":2.6,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143550332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural control on the Southern Andean Nevados de Chillán geothermal system","authors":"Valentina Mura ,&nbsp;Gloria Arancibia ,&nbsp;John Browning ,&nbsp;David Healy ,&nbsp;Camila López-Contreras ,&nbsp;Diego Morata ,&nbsp;Santiago Maza ,&nbsp;Carlos Cardona","doi":"10.1016/j.jsg.2025.105380","DOIUrl":"10.1016/j.jsg.2025.105380","url":null,"abstract":"<div><div>Detailed structural analysis from representative outcrops is necessary to characterize geothermal reservoir dynamics. Here, we estimate fracture density and intensity, as well as the dimensional properties of individual fault and fracture sets in basement rocks of the Nevados de Chillán Geothermal System. We identified several important structural features that could be responsible for controlling local fluid flow; the high-angle sinistral Las Trancas Fault as well as a series of low-angle reverse faults within the Las Termas-Olla de Mote Fault system. Most fractures identified strike either NE-SW, NNE-SSW, and NNW-SSE. Analysis of fault-slip data, supported by seismicity, indicates the presence of a main transtensional regime with subhorizontal NE-trending σ₁. Structures sub-parallel to the present-day local maximum horizontal stress show significant dilation tendencies, whilst NW-SE fractures are less prone to dilation. NE and E-W high angle faults could be primary conduits facilitating the upward migration of hot fluids from reservoirs within crystalline and fractured rocks. The fracture length distribution was analysed using power law, negative exponential, and log-normal distribution. The power law with a scaling exponent of about −3 provides the best fit to the data. This study advances our understanding of the structural control of the geothermal reservoir and its associated fracture-controlled fluid circulation and thereby improves the prospectivity in the region by quantifying the optimum fracture sets for fluid flow.</div></div>","PeriodicalId":50035,"journal":{"name":"Journal of Structural Geology","volume":"196 ","pages":"Article 105380"},"PeriodicalIF":2.6,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Differential salt-related structural deformation in the Eastern segment of the Qiulitage fold and thrust belt, Kuqa Foreland Basin: Evidences from seismic interpretation and numerical simulation analysis","authors":"Yingzhong Zhu ,&nbsp;Chuanxin Li ,&nbsp;Xinyi Jiang ,&nbsp;Yibo Zhao ,&nbsp;Gulifeire Tulujun ,&nbsp;Bencai Zhang","doi":"10.1016/j.jsg.2025.105372","DOIUrl":"10.1016/j.jsg.2025.105372","url":null,"abstract":"<div><div>The dymatic mechanisms of salt-related structural deformation in the foreland fold-and-thrust belts have been paid more and more attention for significance in hydrocarbon exploration. The Qiulitage Fold-and-Thrust Belt (QFTB) in the frontal Kuqa Foreland Basin(KFB) has been regarded as an important study area for its complicated deformation features and potential oil and gas resources. In the eastern QFTB, sub-salt fault-bend folds show a clear transition from a single row of basement-involved thrust belts in the east to a multi-row caprock detachment thrust belt in the west.This study uses discrete element numerical simulations, based on a geological model derived from seismic data, to validate and improve the model's reliability. This research investigates the factors controlling differential structural deformation in the QFTB. These simulations are mainly explored the impact of Jurassic-Triassic detachment layer thickness, stratal dip angle, and the role of dual salt layers. The results indicate that the detachment layer enhances the décollement thrusting effect, with thicker detachment layers leading to stronger décollement thrusting. If the detachment layer is too thin to support décollement thrusting, basement-involved faults develop instead. When the lower detachment layer is less than 800 m thick, two sets of basement-involved faults form, resulting in shorter thrust distances. Conversely, when this layer exceeds 800 m, only one set of basement-involved faults forms, along with two sets of caprock detachment faults at the frontal thrust belt, resulting in relatively greater thrust distances. Stratal dip angle is equivalent to the ancient topography which can restrain the formation and development of the thrust system, with steeper detachment layer angles reducing thrust distance and causing salt accumulation. In a dual-salt layer environment, the compaction of the overlying strata is weakened, which in turn enhances the décollement thrusting effect. The double salt layers of the Jidike and Kumugelemu Formations promote the development of multiple thrust fault arrays and enlarge the scale of frontal secondary anticlines. Therefore, the segmented differential deformation in the QFTB is influenced by the interplay of deep geological structures, detachment layers, and salt layer development. This study integrates seismic interpretation and numerical simulation to investigate the genetic mechanisms of segmented deformation in the QFTB, providing valuable insights and solid evidence for structural interpretation and hydrocarbon exploration in analogous salt-detachment systems.</div></div>","PeriodicalId":50035,"journal":{"name":"Journal of Structural Geology","volume":"194 ","pages":"Article 105372"},"PeriodicalIF":2.6,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rapid crack-seal growth of Faden quartz","authors":"Estibalitz Ukar ,&nbsp;András Fall ,&nbsp;Stephen E. Laubach ,&nbsp;Richard Ketcham","doi":"10.1016/j.jsg.2025.105343","DOIUrl":"10.1016/j.jsg.2025.105343","url":null,"abstract":"<div><div>Faden quartz is characterized by a central thread-like fluid-inclusion-rich zone surrounded by a wide, clear, faceted rim. Typically found in fractures (veins) within low-temperature metamorphic rocks, the origins of Faden quartz remain contentious. We use scanning electron microscope-based cathodoluminescence and charge contrast imaging microscopy to reveal that Faden quartz threads consist of closely spaced, narrow microfractures (gap deposits) filled with quartz, which traps fluid inclusions and is surrounded by postkinematic lateral quartz deposits. Gap deposits form by the crack-seal mechanism of sequential breakage, fracture opening, and quartz precipitation. Faden quartz forms by the same mechanism as crack-seal quartz bridges found in some fractures formed under diagenetic conditions. Most fluid inclusions trapped within crack-seal gap deposits of Faden crystals from the Zhob region, Pakistan show a narrow range of homogenization temperatures between 140 °C and 147 °C and salinities of 3.5–5.0 wt% NaCl equivalents. Spanning quartz results in fracture-normal lengths of several tens of centimeters composed of narrow (5–10 μm) crack-seal deposits. Rapid widening relative to quartz accumulation and apertures enabled these fractures to remain open and function as fluid conduits in the subsurface for millions of years.</div></div>","PeriodicalId":50035,"journal":{"name":"Journal of Structural Geology","volume":"194 ","pages":"Article 105343"},"PeriodicalIF":2.6,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143529321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigating the Messinian salt in the Lebanese Levant basin: Insights into the geology and tectonics of the eastern Mediterranean region","authors":"Karam Sarieddine,&nbsp;Tony S. Nemer,&nbsp;Reenal Faysal","doi":"10.1016/j.jsg.2025.105368","DOIUrl":"10.1016/j.jsg.2025.105368","url":null,"abstract":"<div><div>The Messinian salt layer in the eastern Mediterranean region plays a key role in the Pliocene-Quaternary deformation and formation of the tectonic structures in the Levant Basin. The objective of this paper is to leverage 3D seismic reflection data from the northern Levant Basin offshore Lebanon in order to map the Messinian salt layer and understand its effect on the structures around it. For that, we used current 3D time seismic reflection data to investigate the seafloor and interpret the top and base of the salt layer, and we generated their corresponding bathymetric and structural maps. In addition, we generated isochron maps of the salt layer and the post-salt sedimentary section in an attempt to detect the variations in the lateral thicknesses of these layers. The presented maps helped to understand the impact of the Messinian salt deformation on the surrounding geological structures. We assess the distribution and geometries of the salt structures, and discuss the change in salt thickness across the basin. We also relate the halokinetic movement of the Messinian salt to the formation of bathymetric features along the seafloor. The results provide additional knowledge about the salt tectonics of the Messinian salt layer in the Levant Basin, and offer investigators to pursue further studies on the hydrocarbon potential in relation to the Messinian salt deformation.</div></div>","PeriodicalId":50035,"journal":{"name":"Journal of Structural Geology","volume":"194 ","pages":"Article 105368"},"PeriodicalIF":2.6,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Lateral growth, linkage and driving force of anticlines in the western Qaidam Basin, Northern Tibetan Plateau","authors":"Xiangdong Yang ,&nbsp;Lei Wu ,&nbsp;Bo Wang ,&nbsp;Jianchao Tang ,&nbsp;Wei Tan ,&nbsp;Xuhang Li ,&nbsp;Huitong Yang ,&nbsp;Kai Huang ,&nbsp;Junyong Zhang ,&nbsp;Xiubin Lin ,&nbsp;Ancheng Xiao ,&nbsp;Hanlin Chen","doi":"10.1016/j.jsg.2025.105370","DOIUrl":"10.1016/j.jsg.2025.105370","url":null,"abstract":"<div><div>In fold-and-thrust belts, folds usually grow laterally, and connect with neighboring folds to form larger structures. Whilst these processes significantly impact both the surface morphology and subsurface structures, there remains a gap in understanding the deep deformation involved in lateral growth and linkage of folds. To address this issue, our study focused on the northwestern Qaidam Basin hosting a series of well-exposed NW-SE-trending Cenozoic anticlines. We conducted a comprehensive analysis of the lateral growth and linkage patterns along with their subsurface structures of the anticlines, based on high-resolution remote-sensing images and seismic reflection data. Our investigation reveals that the anticlines are primarily décollement folds, with minor influence from basement-involved reverse faults. They have grown through lateral lengthening from their nuclei, with a generally faster propagation rate toward the southeast. This growth pattern is likely driven by the southeastward decrease in strain rate, coupled with the influence from southeastward tilting of the basement and topography in the Qaidam Basin. We identify six types of lateral linkage among anticlines in the Qaidam Basin: linear linkage, linear repulsion, oblique linkage, overlapped linkage, oblique non-linkage, and triple linkage. Notably, our study reports, for the first time, instances of linear repulsion and overlapped linkage, characterized by abnormally large distance to wavelength ratios. The development of linear repulsion is associated with the buried basement-involved fault between linked anticlines, whereas that of overlapped linkage likely results from rapid lateral growth of anticlines due to intense wind erosion. Moreover, our findings indicate that the en echelon-like distribution and arcuate shapes of the anticlines in the Qaidam Basin primarily stem from the lateral growth and linkage of the short-axis anticlines, rather than inferred basement strike-slip shears. The underlying driving force is the compression from the Qiman Tagh-East Kunlun Shan and the South Qilian Shan to the south and north, respectively. Our study underscores the interplay of décollements, basement-involved faults and erosional processes in shaping the diverse growth and linkage patterns of anticlines in fold-and-thrust belts.</div></div>","PeriodicalId":50035,"journal":{"name":"Journal of Structural Geology","volume":"193 ","pages":"Article 105370"},"PeriodicalIF":2.6,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143420854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural heterogeneities in fault-controlled cavity carbonate reservoirs: Insights into fracture and fault patterns","authors":"Duoming Zheng ,&nbsp;Lijuan Zhang ,&nbsp;Feng Shen","doi":"10.1016/j.jsg.2025.105358","DOIUrl":"10.1016/j.jsg.2025.105358","url":null,"abstract":"<div><div>This study investigates the role of fault zones and fracture networks in controlling cavity distribution and fluid flow within carbonate rocks of the Tarim Basin using static and dynamic data. By integrating multi-attribute unsupervised seismic facies analysis, fracture network modeling based on ant tracking, and slip and dilation tendency analyses, we construct 3D models to characterize fault zone patterns, cavity distribution, fracture geometry, connectivity, and deformation behavior. The results demonstrate that fault zone patterns are the primary controls on cavity distribution, with cavity arrangements closely reflecting the orientations and densities of fracture networks in the DFN model. Extensive cavity geobodies are concentrated at fault zone intersections, where fractures exhibit increased density and connectivity. The large geobody, defined by considerable connected volumes, high permeability, and high production performance, is situated in these intersections with dense, highly connected fracture networks. These networks enhance fluid flow and shape fluid pathways, highlighting their role in cavity reservoir dynamics. These findings provide insights for improving reservoir modeling and optimizing injection-related geoengineering activities, such as acid stimulation and hydraulic fracturing.</div></div>","PeriodicalId":50035,"journal":{"name":"Journal of Structural Geology","volume":"193 ","pages":"Article 105358"},"PeriodicalIF":2.6,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Late Quaternary left-slip rate of the Dangjiang segment along the Ganzi-Yushu-Xianshuihe Fault Zone in the central Tibetan Plateau and the tectonic implications","authors":"Zhongyuan Yu ,&nbsp;Baixu Chen ,&nbsp;Ping Song ,&nbsp;Qi Zhao ,&nbsp;Yicheng Wang ,&nbsp;Wenxuan Wang","doi":"10.1016/j.jsg.2025.105359","DOIUrl":"10.1016/j.jsg.2025.105359","url":null,"abstract":"<div><div>The Dangjiang segment, as the northwestern extremity of the NW-NNW-trending sinistral-slip Ganzi-Yushu-Xianshuihe Fault Zone (GYXFZ) in the central Tibetan Plateau, plays an important role in absorbing strain and regulating the relative movement between active blocks of the Tibetan Plateau interior. However, the late Quaternary strike-slip rate of the Dangjiang segment has rarely been studied because of extreme weather and hypoxia in high-altitude areas (H &gt; 5000 m) and inconvenient transportation, which directly affects the scientific understanding of the tectonic deformation style and reasonable assessment of the strong earthquake hazard along the GYXFZ and the analysis of the present deformation characteristics and geodynamic process of the plateau. Therefore, this study investigated the active tectonics of the Dangjiang segment based on integrated data from high-resolution satellite interpretation, large-scale geomorphic and geological mapping, trench excavations, and Quaternary chronological dating. The results reveal that the Dangjiang segment branches into the main Dangjiang Fault and secondary Zhiduo Fault, both of which have experienced intensive left-strike slip with minor dip movement since the late Quaternary. By measuring offset tributary terraces of the Tongtian River using a UAV survey, and dating their abandonment age using OSL and 14C with the upper terrace model, the late Quaternary strike-slip rate of the Dangjiang Fault and the Zhiduo Fault were estimated at ∼6.9 ± 0.1 mm/a and ∼2.1 ± 0.2 mm/a, respectively. Both the linear fitting value and the slip decomposition model indicate that the strike-slip rate of ∼8–10 mm/a in the late Quaternary is more consistent with geological and geomorphic estimations as well as geodetic constraints along the GYXFZ, and that the late Quaternary slip rate (∼8–10 mm/a) is consistent with the long-term and average slip rates along the structure. This spatiotemporal variation suggests that the current tectonic deformation of the Tibetan Plateau interior may have been continuous and distributed.</div></div>","PeriodicalId":50035,"journal":{"name":"Journal of Structural Geology","volume":"192 ","pages":"Article 105359"},"PeriodicalIF":2.6,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143378442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}