Journal of Structural Geology最新文献

{"title":"Fault-induced karst features: Insights from the Poço Verde Fault tip in the Northwestern portion of Potiguar Basin, Brazil","authors":"Tarsila B. Dantas ,&nbsp;Giulia Striglio ,&nbsp;Vincenzo La Bruna ,&nbsp;Francisco H.R. Bezerra ,&nbsp;Fabrizio Balsamo ,&nbsp;Renata E.B. Araujo ,&nbsp;Carla P.Q. Furtado ,&nbsp;Juliana G. Rabelo ,&nbsp;Rebeca S. Lima ,&nbsp;David L. Vasconcelos ,&nbsp;Delano M. Ibanez ,&nbsp;Francisco P. Lima-Filho","doi":"10.1016/j.jsg.2025.105341","DOIUrl":"10.1016/j.jsg.2025.105341","url":null,"abstract":"<div><div>This work aims to understand the tectonic framework that influenced and controlled the karstification processes along a shallow water carbonate sequence. Both multi-scale and multi-disciplinary approaches are presented in this work to unveil the interaction between the structural network and the karstification events. In this manner, seismic, satellite, drone, Ground Penetration Radar (GPR), and field analyses were performed. The analysis of 3D seismic data highlighted the presence of a Cretaceous NW-SE striking kilometric scale fault zone (Poço Verde Fault System) characterized by a negative-flower structure associated with a transtension fault composed of synthetic and antithetical faults. A seismic profile localized along the fault tip portion of the Poço Verde Fault System confirms this fault architecture. After analyzing regional lineaments in Shuttle Radar Topography Mission (SRTM) data and high-resolution drone images, we have identified two main fault sets localized along the Poço Verde fault tip zone. Here, a main NW-SE striking fault set and a minor N-S striking fault set are present. These structural features are associated with different tectonic phases. In this sector, the Furna Feia Cave System is localized. Furthermore, field evidence indicates a Cenozoic reactivation of pre-existing structures, which has led to an increase in fracture density and intensity. A dolomitic interval in GPR sections appears more deformed compared to the limestone portions. The presented work suggested that the Poço Verde Fault impacted, controlled, and promoted both dolomitization and karstification processes that affected the studied carbonate rocks.</div></div>","PeriodicalId":50035,"journal":{"name":"Journal of Structural Geology","volume":"192 ","pages":"Article 105341"},"PeriodicalIF":2.6,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143349333","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":"Fault crest collapse and gravity sliding in the late Jurassic northern North Sea rift","authors":"Haakon Fossen","doi":"10.1016/j.jsg.2025.105345","DOIUrl":"10.1016/j.jsg.2025.105345","url":null,"abstract":"<div><div>Active rifting generates a basin-and-range style rift topography with rotated fault blocks and associated hanging-wall basins. During this process, fault block crests become prone to gravity collapse, particularly where weak sediments or sedimentary rocks are involved. The Mort landslide studied here is a large-scale slide formed by gravity collapse of a major Jurassic North Sea rift fault block at the time when local rift topography approached 1.5–2 km. From seismic data, this 24 km³ large marine slide is seen to stretch ∼15 km along the major Snorre rift fault, making it one of the largest mapped North Sea rift landslides. It is characterized by a single basal detachment (the Mort detachment) on which Triassic-Jurassic sediments moved up to 2–2.5 km. Well-developed detachment corrugations at the 100-m to kilometer scale reveal dip-slip sliding toward 100–110° (ESE), parallel to the slip direction of the underlying Snorre rift fault.</div><div>The slide is broken up by normal faults that detach onto the low-angle Mort detachment, but in general, stratigraphic layering is well preserved. It shows a complex pattern where folds within the slide are upright with wavelengths up to 2 km, attesting to the soft nature of the slide. A prominent set of folds are ESE-plunging and mimics the corrugated geometry of the underlying Mort detachment. Other folds trend subparallel to the slide and probably formed as a result of differential movements during sliding. The toe zone shows evidence of layer back-rotation and thrusting, resting on the upper Jurassic Heather Formation. Postdated by uppermost Jurassic claystones of the Draupne Formation, the slide must have formed toward the end of the rift maximum around 155 Ma, at a time when the surface had reached its maximum relief of 1.5–2 km. The implications of such a gravitational collapse are exhumation of older (e.g., reservoir) rocks on fault block crests and possibly a change in local fluid migration pathways from local basins to those crests. Internal deformation must however be considered when evaluating their reservoir or fluid flow properties.</div></div>","PeriodicalId":50035,"journal":{"name":"Journal of Structural Geology","volume":"192 ","pages":"Article 105345"},"PeriodicalIF":2.6,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143180181","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":"Multi-layers: Do incompetent horizons always act as thrust flats?","authors":"Clare E. Bond,&nbsp;Francisca Robledo,&nbsp;Robert W.H. Butler","doi":"10.1016/j.jsg.2025.105349","DOIUrl":"10.1016/j.jsg.2025.105349","url":null,"abstract":"<div><div>During thrusting incompetent weak layers are often interpreted as acting as thrust flats, creating décollements on which material is laterally translated. Thrust flat interpretations create specific thrust geometries with implications for lateral shortening and partitioning of strain within the rock volume. The pervasive nature of thrust flat interpretations in thrust belts therefore has significant impact on predicted shortening and strain. However, thrust interpretations, even in multilayers, do not always require thrust flats. Here, we show that strain evidenced by folds and faults in a multi-layer sequence from the Swiss Jura cannot be explained by thrust flats in incompetent horizons. We found, through line length balancing seismic sections in a 3D seismic cube, that the strain is partitioned into discrete zones above basement faults. The strain cannot be located in these positions simply through lateral displacement on a thrust flat or flats, rather it is explained by vertically distributed shortening above these basement structures. Multiple interpretations of the same seismic sections show that uncertainty in seismic interpretation creates a range in predicted shortening that is greater than the differences in shortening with depth. Indicative of no lateral movement of material on incompetent horizons within the stratigraphy, more the stratigraphy has shortened as a whole. Line length balancing in blocks along individual seismic profiles indicates deformation partitioned within and between sections, creating a complex picture of thrust evolution and strain partitioning at least in the latter stages of thrusting creating the geometries seen. The results have implications for the interpretation and understanding of the evolution of the Jura fold-thrust belt and for thrust-belts globally.</div></div>","PeriodicalId":50035,"journal":{"name":"Journal of Structural Geology","volume":"192 ","pages":"Article 105349"},"PeriodicalIF":2.6,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143180180","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":"Erratum to “The collapse of the Caledonian orogen in SW Norway: Insights from quartz textures” [J. Struct. Geol. 189 (2024) 105274]","authors":"Carolina Cavalcante ,&nbsp;Haakon Fossen ,&nbsp;Leonardo Lagoeiro ,&nbsp;Rhander Taufner","doi":"10.1016/j.jsg.2024.105289","DOIUrl":"10.1016/j.jsg.2024.105289","url":null,"abstract":"","PeriodicalId":50035,"journal":{"name":"Journal of Structural Geology","volume":"189 ","pages":"Article 105289"},"PeriodicalIF":2.6,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142756588","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":"In situ Rb–Sr geochronology of slickensides reveals reactivation of cratonic margins post-Gondwana assembly","authors":"Ingridy S. Nicomedes ,&nbsp;Bruno V. Ribeiro ,&nbsp;Fabricio A. Caxito ,&nbsp;Christopher L. Kirkland ,&nbsp;Anderson Victoria ,&nbsp;Zakaria Quadir","doi":"10.1016/j.jsg.2024.105305","DOIUrl":"10.1016/j.jsg.2024.105305","url":null,"abstract":"<div><div>Assessing the time-strain evolution of orogenic structures is a crucial but difficult task, especially for upper-crust structures where the deformation conditions are often below the closing temperature of the main geochronometers. Conventional Rb–Sr and total fusion ⁴⁰Ar/³⁹Ar techniques are insufficient to spatially-resolve distinct microstructures, such as inherited and recrystallized micas associated with fault zones developed under low to medium-temperature conditions. Here we present <em>in situ</em> Rb–Sr geochronology of fine-grained micas from fault-related rocks of the São Francisco Craton margin, in the Southern Espinhaço Range (SE Brazil), to investigate the timing and effects of fault reactivation at the dawn of Gondwana assembly. Fine-grained muscovite and biotite from slickensides yield Rb–Sr isochron ages spanning 500–450 Ma associated to thrust faults reactivation. This tectonic reactivation is coeval with brittle-ductile deformation of marbles in the footwall of the main regional thrust zones. These novel mica Rb–Sr ages indicate that thrust reactivation was 30–80 Ma younger than the last regional metamorphic event related to collisional deformation in the Araçuaí Orogen, coinciding with the timing of post-collisional magmatism and a fluid flow event in the cratonic margin. We envisage that fault reactivation in the São Francisco Craton margin might be associated with thermal post–orogenic relaxation due to gravitational collapse of the Araçuaí Orogen, with gravity-driven mass transport from the orogenic core causing compressive reactivation in the external fold-thrust-belt. These new results indicate that the Brasiliano thrust fronts remained active throughout the main interval of biogeochemical development in the Ediacaran–Cambrian transition post-Gondwana assembly.</div></div>","PeriodicalId":50035,"journal":{"name":"Journal of Structural Geology","volume":"191 ","pages":"Article 105305"},"PeriodicalIF":2.6,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142742942","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 inheritance and hydrothermal alteration impact on fluid circulation in a clay-rich shear zone","authors":"Benjamin Avakian ,&nbsp;Béatrice A. Ledésert ,&nbsp;Ghislain Trullenque ,&nbsp;Ronan L. Hébert ,&nbsp;Johanne Klee ,&nbsp;Sébastien Potel ,&nbsp;Titouan Miloikovitch ,&nbsp;Steven Goderis ,&nbsp;Philippe Claeys","doi":"10.1016/j.jsg.2024.105296","DOIUrl":"10.1016/j.jsg.2024.105296","url":null,"abstract":"<div><div>Deep geothermal power plants in the Upper Rhine Graben (URG) harness natural hot brines circulating within the fracture network of basement rocks. The nature and geometry of the fault network must be documented in detail to reduce the risk of targeting low-permeability structures during drilling. Fault zones and associated fracture networks exhibit variable hydraulic properties depending on the nature of their deformation, hydrothermal alteration, and mineral infills. The Schauinsland mine, located on the eastern shoulder of the URG, is considered an analogue for exploited geothermal basement reservoirs. It provides a 3D exposure of a clay-rich shear zone and a perpendicular ore vein, analogous to present-day brine circulation pathway encountering a heterogeneously permeable structure. Petrophysical, petrographical, mineralogical and geochemical investigations of this shear zone offer the opportunity to reconstruct its formation and the associated fluid pathways. A statistical analysis of the dataset was carried out to highlight correlations between deformation and hydrothermal alteration processes. Through repeated seismic cycles, the core zone shifted from a conduit to a barrier for fluid circulation, due to the precipitation of secondary minerals within the remaining open spaces, resulting in a multi-core structure. Observations show that the damage zones within the transition zone of the shear zone likely constitute the optimal zone for present-day fluid circulation.</div></div>","PeriodicalId":50035,"journal":{"name":"Journal of Structural Geology","volume":"190 ","pages":"Article 105296"},"PeriodicalIF":2.6,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747536","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":"Studying the kinematics of magma emplacement in fabric-weak, epizonal plutons: The example of the Sauce Guacho and Santa Rosa plutons, eastern Sierras Pampeanas, Argentina","authors":"Ana Eugenia Acosta-Nagle ,&nbsp;Juan Díaz-Alvarado ,&nbsp;Carlos Fernández ,&nbsp;Rodolfo Christiansen ,&nbsp;Fernando Javier D'Eramo ,&nbsp;Lucio Pedro Pinotti ,&nbsp;José Pablo López ,&nbsp;Laura Iudith Bellos","doi":"10.1016/j.jsg.2024.105294","DOIUrl":"10.1016/j.jsg.2024.105294","url":null,"abstract":"<div><div>This work presents emplacement kinematics for two plutons emplaced in a crustal level dominated by brittle conditions as a useful methodology in the study of shallow, small intrusive bodies where the field evidence of deformation is scarce.</div><div>The study was carried out in the Sauce Guacho and Santa Rosa plutons, both located on NO sector of Sierra de Ancasti. They are zoned syeno-monzogranitic, strongly peraluminous intrusive bodies representing typical Carboniferous intracontinental magmatism in the Eastern Sierras Pampeanas of Argentina. Both plutons present ellipsoidal external shapes, and sharp and discordant contacts with the host rocks suggesting an emplacement with high rheological contrast between the intrusive magma and the metamorphic host rock. The geophysical study highlights an elongated, arcuate gravimetric low that coincides and is aligned with the long axis of both plutons and with a zone characterized by brittle structures. Regarding structural measurements, the main penetrative structure of the host rocks (Ancasti Formation) shows an averaged NNW-SSE orientation and presents a slight but significant variation close to the plutons. Magmatic fabrics were observed in the porphyritic units (K-feldspar megacrysts) that constitute part of the igneous bodies. All these pieces of evidence suggest a possible structural control during the emplacement of the igneous bodies and constitute the data used in the structural analysis that tests five different conceptual models simulating the shear zone influence for the emplacement of the plutons.</div><div>According to our kinematic analysis, the distinct structural features and external shapes found in the Sauce Guacho and Santa Rosa plutons and their metamorphic envelope were imposed by the curved deformation zone. Thus, magma ascent and emplacement were probably assisted by the nucleation and growth of a dextral transtensional structure, with a predominance of simple shear (Wk ≫ 0.81) in its southern, NNE-SSW-striking segment (Santa Rosa pluton area), and with a predominance of pure shear (0.6 &gt; Wk &gt; 0.1) in its northern, NE-SW striking segment (Sauce Guacho pluton area).</div><div>In addition to a feasible emplacement model, our structural analysis shed light on the barely known Carboniferous tectonic scenario in this intracontinental setting of SW Gondwana. The common divergence angle estimated for both brittle-ductile shear zone segments is oriented 157°±9°. Therefore, this structure could have acted as a dextral transtensional structure with predominance of the coaxial component (extension) in NE-SW segments and dominated by simple shear in oblique NNE-SSW branches, interpreted as R-type fractures.</div></div>","PeriodicalId":50035,"journal":{"name":"Journal of Structural Geology","volume":"190 ","pages":"Article 105294"},"PeriodicalIF":2.6,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747636","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":"Topological and petrophysical analyses across a fault zone containing deformation bands","authors":"G.B. Honório ,&nbsp;F.C.C. Nogueira ,&nbsp;M.A. Nicchio ,&nbsp;D.L. Vasconcelos ,&nbsp;J.A.B. Souza ,&nbsp;R.B.R.M. Freitas ,&nbsp;A. Moraes ,&nbsp;B.R.B.M. Carvalho ,&nbsp;J.C.D. Sanglard ,&nbsp;H.A.S. Ferreira","doi":"10.1016/j.jsg.2024.105295","DOIUrl":"10.1016/j.jsg.2024.105295","url":null,"abstract":"<div><div>Oil reservoirs and CO₂ storage can be affected by fault damage zones with deformation bands that impact fluid flow. In this study, we analysed how a deformation band network varies in terms of frequency across the Malta Fault Damage Zone at Rio do Peixe Basin (Brazil). We used 52 sample areas moving away from the fault core to analyze the characteristics of the deformation bands network (termination, nodes proportions, and permeability) in regard to the different architectural elements of the fault zone (e.g., inner, outer, and transitional damage zone and undeformed host rock). Our results had distinct topology patterns of the deformation band network across the damage zone, and the quantitative data followed a normal distribution inside these elements but did not reflect the damage zone as a whole. The X-nodes tended to decrease moving away from the inner damage zone and became absent in the undeformed host rock, whereas the I-node increased moving away from the fault core. The topological analysis revealed similarities between the linear intensity and area frequency. The relationship between the area of deformation band branches and the sample area was inversely proportional to the equivalent pore diameter and porosity. Additionally, the deformation band connectivity decreased by one order of permeability to the branches in the deformation band. We hope that these findings stimulate further discussions on the use of topology in characterizing damage zones with deformation bands and support the modeling and simulation of CO₂ storage.</div></div>","PeriodicalId":50035,"journal":{"name":"Journal of Structural Geology","volume":"190 ","pages":"Article 105295"},"PeriodicalIF":2.6,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747535","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":"Evidence for an aseismic gap between the Mw6.8 Pütürge (Elazığ) and 7.8 Pazarcık (Kahramanmaraş) earthquakes in the east Anatolian fault system, southeast Türkiye","authors":"Elif Akgün ,&nbsp;Savaş Topal ,&nbsp;Mustafa Softa ,&nbsp;Murat Nas ,&nbsp;Serkan Gürgöze ,&nbsp;Hasan Sözbilir ,&nbsp;Ercan Aksoy ,&nbsp;Joel Q.G. Spencer ,&nbsp;Mehmet Yüksel","doi":"10.1016/j.jsg.2024.105293","DOIUrl":"10.1016/j.jsg.2024.105293","url":null,"abstract":"<div><div>This study examines the unruptured portion of the Pütürge segment, the least-studied section of the East Anatolian Fault System (EAFS) in southeast Türkiye, focusing on the Şiro Valley to comprehensively understand the observed distribution in deformation. Despite the February 6, 2023 doublet earthquakes, the Pütürge segment near the Şiro Valley remained relatively stable, though significant stress accumulation was detected at both ends. Fieldwork and subsequent morphometric and structural analyses confirmed notable tectonic activity in the area. Geomorphic indices were applied to assess tectonic activity, yielding an average index of relative tectonic activity (Iat) for all drainage basins, highlighting varying tectonic intensity levels across the Şiro Valley. Mountain front sinuosity (Smf) analysis indicated different uplift rates and tectonic forces along distinct fault segments. Additionally, Hypsometric Integral-Hypsometric Curve (HI-HC) index analysis pointed to rapid uplift processes, particularly in the eastern part of the fault-controlled basin, signaling active tectonic uplift and geomorphic rejuvenation. Normalized steepness index (ksn) and Chi (χ) values highlighted variations in erosion rate, providing insight into regional uplift patterns and knickpoint distributions. These findings align with the dominant transtensional tectonic regime in the area, as inferred from slip data inversions along the Şiro Valley. The region's fault geometry, oblique movement, and block rotations firmly support this interpretation. Comparisons of slip rates and ground deformation models revealed notable variations in fault behavior, suggesting ongoing energy accumulation, possibly linked to aseismic creep. The complex fault system behavior was underscored by the 2020 Sivrice earthquake and the 2023 doublet, which highlights the critical role of the Pütürge segment in the dynamic evolution of the EAFS.</div></div>","PeriodicalId":50035,"journal":{"name":"Journal of Structural Geology","volume":"190 ","pages":"Article 105293"},"PeriodicalIF":2.6,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747534","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":"Geometry of curved slickenlines as a function of rupture direction, asperity durability and coseismic roughening of fault surfaces","authors":"Timothy A. Little ,&nbsp;Jesse Kearse ,&nbsp;Yoshi Kaneko ,&nbsp;Russ Van Dissen","doi":"10.1016/j.jsg.2024.105291","DOIUrl":"10.1016/j.jsg.2024.105291","url":null,"abstract":"<div><div>Global data indicate slickenlines inscribed during surface rupturing earthquakes are typically curved. Dynamic rupture modelling relates slip curvature to time-varying stresses in rupture process zones. Such models generate striation curvature depending on rupture propagation direction and Andersonian slip type. Using 2D kinematic models in a new MATLAB program called <em>Slicks</em>, we explore expected patterns of curved slickenline on fault surfaces, comparing them to observations of natural slip striae on scarps of the Kekerengu Fault after the 2016 Kaikōura Earthquake, New Zealand, and the Alpine Fault, New Zealand which last ruptured in 1717 CE. As predicted by the dynamic rupture models, some slickenlines on both faults are curved at their upstream (older) ends and transition downstream to a longer, straighter trajectory. <em>Slicks</em> predicts that curved tracks should intersect, a relationship that we observed in the field, and that, for a given slip history, slickenline patterns and track-length distributions should vary depending on initial density of plowing elements, their mean durability or longevity, and the rates at which new asperities are introduced and smoothed. Striation patterns on the Kekerengu Fault suggest that inscribing asperities were established at the beginning of the earthquake rupture, with this roughness being quickly smoothed during the earthquake.</div></div>","PeriodicalId":50035,"journal":{"name":"Journal of Structural Geology","volume":"190 ","pages":"Article 105291"},"PeriodicalIF":2.6,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747532","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}