Basin Research最新文献

{"title":"Reconciling Geologic and Paleotopographic Constraints on Source-to-Sink Sediment Fluxes: An Example From the Bartonian Pyrenees","authors":"Xiang Yan,&nbsp;Alexander C. Whittaker,&nbsp;Benjamin Gréselle","doi":"10.1111/bre.70037","DOIUrl":"https://doi.org/10.1111/bre.70037","url":null,"abstract":"<p>Estimations of source-to-sink sediment fluxes over geological timescales allow a better understanding of landscape sensitivity to forcings such as climate or tectonics. The Pyrenees Mountains represent an ideal location to test the accuracy of source-to-sink predictive methods, as the well-studied mountainous sources and sediment sinks, including the Aquitaine, Jaca, and Ebro basins, collectively serve as a reference for evaluating the accuracy of predictive approaches. This study uses a paleo-digital elevation model (pDEM) of Bartonian age (ca. 40 Ma) to reconstruct catchments for the Pyrenees. When coupled with published paleoclimatic constraints, the BQART equation is used to predict sediment fluxes into each sedimentary basin. Predicted sediment volumes are compared against volumes calculated from bedrock exhumation rates across the Pyrenees, and against published rock volumes preserved within Pyrenean sedimentary basins. Consistency between total sediment volumes predicted by the BQART model and for exhumation rates is within a factor of 1.5, and within a factor of 2 when sediment volumes are partitioned by sedimentary basin, indicating the pDEM is able to generate realistic, first-order estimates of sediment flux. An uncertainty analysis showed that the runoff category contributes the greatest uncertainty to the BQART equation, highlighting the requirement for paleoclimate and drainage constraints on this parameter. When BQART and exhumation-derived volumes are compared against preserved sediment volumes in the Aquitaine and Jaca Basins, sediments are undercounted by an order of magnitude. This is a result of the limited scope of volume quantification, as depocentres are defined by modern geography only, and from the postdepositional erosion of sediment in an active orogenic setting. Sediment volumes in the better-preserved Ebro Basin were predicted within a factor of 1.35 and 2.5. The results show that the pDEM-BQART method can appraise both the completeness of the sedimentary record within depocentres and successfully elucidate source-to-sink sediment routing within ancient orogens.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"37 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/bre.70037","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144232249","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 Cretaceous Tectonic Evolution of the Sorgenfrei–Tornquist Zone (STZ): Deposition and Palaeoceanographic Implications Based on Reflection Seismic Data","authors":"Yaocen Pan,&nbsp;Christian Hübscher,&nbsp;Elisabeth Seidel,&nbsp;Christopher Juhlin","doi":"10.1111/bre.70040","DOIUrl":"https://doi.org/10.1111/bre.70040","url":null,"abstract":"<p>We present a structural and depositional interpretation in the southeasternmost Sorgenfrei–Tornquist Zone (STZ), one of the most prominent Late Cretaceous compressional inversion structures in Northern Europe. Detailed stratigraphic analysis of seismic facies and well data shows that the spatial and temporal variability of gravitational deposits, contourite drifts, and moats in the marginal troughs are related to the polyphase inversion tectonic history and the associated palaeoceanographic changes. The Hanö Bay and Bornholm Basin contain a sand-rich mounded depositional feature proximal to the STZ. This unit is resolved with high vertical resolution in seismic data and represents a clear example of a siliciclastic-carbonate mixed depositional system, where deposition was controlled by the interplay between inversion events and eustatic sea-level changes. Following the progradational and aggradational deposition during an early inversion phase and tectonic quiescence, a notable back-stepping pattern is observed in the upper Santonian–lower Campanian. The increased accommodation space outpaced sediment infill during eustatic sea-level rise in the late Santonian. We interpret that the marginal trough subsided during multiple inversion pulses associated with elastic flexure in response to inversion tectonics. The comparison of sequence-stratigraphic indicators and the global (eustatic) sea-level curve allows for a refined reconstruction of the inversion history and points to a major uplift in the Santonian–Campanian. Further, we attribute a penecontemporaneous change in the depositional pattern, i.e., the erosional Campanian–Maastrichtian contourite moat system, to intensified bottom current activity related to significant global cooling, in conjunction with the palaeoceanographic modification induced by the inversion tectonics described in this study.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"37 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/bre.70040","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144214091","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":"Tectonic and Sedimentary Insights Into Transtensional Basins Along the Pacific-North American Plate Boundary in the Northern Gulf of California","authors":"Mario González-Escobar,&nbsp;Cristian Alejandro Gallegos-Castillo,&nbsp;Sergio Manuel Arregui-Ojeda,&nbsp;Edgar Agustín Mastache-Román","doi":"10.1111/bre.70039","DOIUrl":"https://doi.org/10.1111/bre.70039","url":null,"abstract":"&lt;div&gt;\u0000 \u0000 &lt;p&gt;In its northern sector, the Gulf of California presents intricate tectonic and sedimentary characteristics, offering insights into the region's geologic evolution. Based on two-dimensional seismic reflection profiles, we explore its structural style and sedimentary properties. Sedimentary thicknesses range from 7 km to over 10 km, heavily influenced by Colorado River sediments filling fault-bounded axial basins, including the Wagner, Consag, Upper Delfín, and Lower Delfín basins. The Wagner Basin comprises two asymmetric sub-basins trending NNE. A low-angle fault controls the northern sub-basin, which lacks bathymetric expression. In contrast, oblique faults influence the southern sub-basin, 12–15 km wide, as they merge into the Wagner Fault and transfer strain to the Cerro Prieto Transform Fault. Late Pliocene deformation is evident, with significant subsidence reflected in the top Pliocene horizon. Axial basins in the northern Gulf exhibit composite separation geometry with four north–south trending sub-basins linked by transform faults, including the Canal de Ballenas in the south and Cerro Prieto in the north. Strain transfer from the Canal de Ballenas fault produces a complex horsetail network, resulting in distributed transpressional deformation within the Upper and Lower Delfín basins. Active faults predominantly cut the seafloor west of the Tepoca Fault Zone, defining the modern rift's eastern boundary. Fault-bounded marginal basins, such as those on Tiburón Island and the adjacent Gulf coast of Sonora, expose late Miocene faulted non-marine deposits, indicating NE–SW extension and rift basin formation. Lower Pliocene marine deposits reveal marine incursions due to Pacific–North American plate movements. NE-trending normal and oblique faults govern the active depocentres in the Wagner, Consag, Upper Delfín, and Lower Delfín basins. In the Upper Delfín Basin, four to five asymmetric depocentres are evident, shaped by tectonic activity. The Lower Delfín Basin features a NE-trending symmetric rift parallel to the Ángel de la Guarda structural high, highlighting its tectonic alignment. The Tiburón Basin, characterised by a poorly defined acoustic basement, reveals substantial basin fill overlying the lower continental crust, indicating significant sedimentary accumulation. The Tiburón and De Mar faults control the NE-oriented asymmetric depocentres in the Tiburón Basin. Abandoned basins along the eastern margin, including Tiburón, Tepoca, Peñasco, and Altar, are separated from active basins by structural highs. Basement irregularities in the Delfín and Consag basins reflect remnants of hyper-extended continental crust, with intra-basin structural highs resembling boudins of lower continental crust. This study underscores the importance of tectonic and sedimentary processes in shaping the northern Gulf of California, highlighting the role of major faults in its geological and topographical evolution.&lt;/p&gt;\u0000 &lt;/","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"37 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140805","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":"Subsurface Geology of the Paraná-Etendeka Large Igneous Province: Implications to Province Stratigraphy and CO2 Storage","authors":"Lucas M. M. Rossetti,&nbsp;John M. Millett,&nbsp;Marcos M. M. Rossetti,&nbsp;Gabriel Medeiros Marins,&nbsp;Matheus S. Simões,&nbsp;Ben Manton,&nbsp;Isabela de Oliveira Carmo,&nbsp;Evandro F. de Lima","doi":"10.1111/bre.70038","DOIUrl":"https://doi.org/10.1111/bre.70038","url":null,"abstract":"<p>Volcanic reservoirs represent an important target for CO₂ storage and large-scale deployment. We accessed the volcanic stratigraphy of the Paraná-Etendeka Large Igneous Province (PELIP) in South America through the analysis of petrophysical data from 9 exploration wells and regional seismic data. This approach enables the development of a refined geological model of the subsurface, offering new insights into facies distribution and reservoir characteristics. Stratigraphically, the PELIP consists of two major volcanic sequences: an older low-Ti (LT) sequence in the southern region and a younger high-Ti (HT) sequence in the central-northern area. Seven distinct lava formations have been identified based on their architecture and geochemical signatures, with the Vale do Sol, Pitanga and Paranapanema formations accounting for over 80% of the stratigraphy. The province is formed by thick (c. 25 m) tabular lavas with well-developed vesicular and brecciated upper crusts and subordinately compound lavas and volcaniclastic/siliciclastic deposits. Petrophysical analyses reveal a strong correlation between rock facies and reservoir properties (i.e., porosity and permeability). Lava flow tops exhibit high porosities comprising c. 10%–40% of the total flow thickness and represent viable targets for CO₂ injection. In contrast, massive flow cores are low in porosity and may act as effective seals. The PELIP is geologically similar to other large igneous provinces currently hosting CCS (carbon capture and storage) projects (Carbfix, Iceland and Wallula, USA). The large volume of basaltic rocks, along with high porosity facies and reactive compositions, makes the Paraná-Etendeka LIP a potential target for CCS developments in South America.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"37 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/bre.70038","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144108767","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":"Geometric and Spatial Analysis of Wing-Like Intrusions as Outcrop Analogues for Subsurface Analysis","authors":"Robert J. Waltham,&nbsp;Gustavo Zvirtes,&nbsp;Brian S. Burnham,&nbsp;Andrew Hurst","doi":"10.1111/bre.70036","DOIUrl":"https://doi.org/10.1111/bre.70036","url":null,"abstract":"<p>Wing-like intrusions are some of the most prominent architectural elements identified within subsurface sand injectite complexes. These structures are composed of discordant inner wing zones and bedding-concordant outer wing zones, which can crosscut hundreds of metres of stratigraphy and extend laterally for several kilometres. Their large-scale geometry makes them discernible on seismic data; however, the inability to detect associated smaller intrusions can lead to underestimates of their significance within a basin. To support subsurface analysis, this study integrates field and digital mapping analyses of two wing complex outcrops from two giant injection complexes of the San Joaquin Basin. The Dosados Canyon wing, of the Panoche Giant Injection Complex (PGIC), features a single 14 m thick stepped inner intrusion that bifurcates into outer sills. The wing extends laterally over 1.5 km, crosscutting ca. 300 m of mudstones. Up to 64% of the sandstones are associated with sub-seismic intrusions (&lt; 3 m thickness). The Tumey Hill wing within the Tumey Giant Injection Complex (TGIC) intrudes vertically &gt; 200 m of mudstones and extends laterally for at least 1.3 km. It comprises laterally stacked inner intrusions (up to 12 m thick) transitioning to a highly connected outer sill zone. A total of 225 intrusions (0.15 m to 8 m thick) are identified within the composite wing structure, adding sand volume and providing excellent connectivity. Comparison with the Volund and Varadero fields within the North Sea reveals intrusions with similar scale and geometry, underscoring the value of the outcrops as analogues for characterisation of subsurface reservoirs and to aid the understanding of sand intrusion formation within different basin settings.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"37 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/bre.70036","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143950043","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":"Imaging Bajocian Coral Ridges in the Paris Basin and Deciphering Their Origin","authors":"Benjamin Brigaud,&nbsp;Benoît Vincent,&nbsp;Marc Pessel,&nbsp;Albane Saintenoy,&nbsp;Hermann Zeyen,&nbsp;Christophe Durlet,&nbsp;Jessica Saïag,&nbsp;Michel Hayet","doi":"10.1111/bre.70034","DOIUrl":"10.1111/bre.70034","url":null,"abstract":"&lt;p&gt;Enigmatic N120° ridges have been identified from 3D seismic reflection imaging of the Bajocian limestones of the eastern Paris Basin. These features may impact flows within the active Middle Jurassic aquifer beneath the Callovian–Oxfordian claystones and marls that host the Underground Research Laboratory (URL) where the Andra (French National Agency for Radioactive Waste Management) is studying the feasibility of a deep repository for radioactive waste. Worldwide, there are numerous other examples where carbonate buildups form ridges in 3D, which are more or less interconnected, laterally amalgamated, or bifurcating, with no clear reason for these geometric features. It is consequently of paramount importance to understand the nature and origin of these ridges, and an integrated study combining (1) well logs, (2) new 3D seismic acquisitions, (3) classical field sedimentology and stratigraphy, (4) near-surface geophysics including ground penetrating radar (GPR), electrical resistivity tomography (ERT) and frequency-domain electromagnetics (FDEM) and (5) seismic refraction has been developed to investigate them. Facies analysis and a regional sequence stratigraphy interpretation, integrating near-surface geophysical imaging performed on time-equivalent outcrop sections, demonstrate that elongated mounds of hermatypic scleractinian corals developed during the early Bajocian (&lt;i&gt;Humphriesianum&lt;/i&gt; chronozone) in shallow, warm oligotrophic seawater. These buildups nucleated as patches on hardground atop giant subaqueous dunes composed of peloidal and bioclastic grainstones, dipping mostly N30° with N120°-oriented crests. Some of the coral reefs form buildups up to 15 m high and several hundred meters wide. They are elongated in the main N120° direction of the underlying dunes, although the dispersion of measurements illustrates the complexity of the interfingered structures observed in 3D seismic images. The coral buildups are progressively onlapped and draped by oncoid-rich alternating marl-limestones that may result from a shift from oligotrophic to mesotrophic conditions probably brought about by a rise in relative sea level. Near-surface geophysics provide insightful supporting evidence to supplement the field work, particularly by imaging the roots of several coral reefs, their internal structures and the infill of the inter-reefal troughs. This work demonstrates the critical importance of outcrop analogue studies for resolving subsurface problems and also shows how near-surface geophysical methods can usefully supplement direct classical field geology investigations. This new characterisation suggests that coral reefs forming ridges, structures that have often remained enigmatic, could develop by directly settling at the top of early cemented giant oo-bioclastic dunes. Submarine early diagenesis generates hardgrounds that constitute stable substrates for nucleation and growth of coral reefs, especially when they cap prominent submarine relie","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"37 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/bre.70034","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143933027","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":"Crustal Melting Events During the Late Stage of Syn-Rift at the Magma-Intermediate Continental Margin: A Numerical Study From the Northern South China Sea Margin","authors":"Fucheng Li,&nbsp;Zhen Sun,&nbsp;Hongfeng Yang,&nbsp;Yunying Zhang,&nbsp;Ziying Xu,&nbsp;Lijie Wang","doi":"10.1111/bre.70035","DOIUrl":"10.1111/bre.70035","url":null,"abstract":"<div>\u0000 \u0000 <p>The traditional distinction of magma-poor and magma-rich margins is challenged by the presence of significant late-stage rift-related magmatism in certain margins, such as the South China Sea (SCS). We use numerical modelling to investigate the conditions and processes that lead to crustal melting and the formation of high-velocity lower crustal layers (HVLs) in such magma-intermediate margins. The models demonstrate that the preferential removal of the lithospheric mantle during rifting is crucial for crustal melting, as it allows the crust to receive sufficient heat from the upwelling asthenosphere. The extent and distribution of crustal melts are influenced by extension velocity and crustal rheology, and the models reveal a strong correlation between the presence of crustal melts and thin-crust domains (&lt; 20 km thick). The study reveals a younger-oceanward trend in magmatism, attributed to the progressive exposure of the crust to the hot asthenosphere during rifting. Comparison of modelling results with seismic observations from the SCS margin suggests that both asthenospheric and crustal melts contribute to the formation of HVLs, with crustal melts estimated to constitute approximately 15%–30%. The results not only deepen our understanding of magmatic processes in magma-intermediate margins, but also provide quantitative evidence for the classification and interpretation of passive margins.</p>\u0000 </div>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"37 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143926914","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":"Misleading Basin Margins—Analysis of the Upper Permian Succession in the Retroarc Foreland Bowen Basin of Northeast Australia","authors":"Jasmin Naher,&nbsp;Christopher R. Fielding,&nbsp;Mike A. Martin","doi":"10.1111/bre.70033","DOIUrl":"10.1111/bre.70033","url":null,"abstract":"<div>\u0000 \u0000 <p>The meridional, Permo–Triassic Bowen Basin of NE Australia became a retroarc foreland basin in the late Permian, with a mapped foredeep axis (Taroom Trough) running north–south adjacent to the eastern edge of the basin. The present outline of the basin is, nonetheless, shaped by significant structural deformation along its eastern margin, and stratigraphic pinch-outs and erosional truncation in the west. The plan form of the basin thus gives a potentially misleading representation of the basin's original shape and extent. By analysing wireline log data from over 1000 drillholes, we developed isochore, net sand thickness, and net-to-gross maps, which inform a new set of palaeogeographical maps for the three upper Permian formations of the Bowen Basin (Peawaddy Formation, Black Alley Shale, and Bandanna Formation, in ascending order). These maps were further refined using palaeocurrent data from outcrops and validated against logged vertical sections from various parts of the basin. Isochore plots for the three formations indicate abrupt truncation of contour lines along the structural eastern margin, in the Taroom Trough. This pattern is interpreted as evidence of significant erosion of stratigraphy along the eastern basin margin during contractional deformation. Based on these findings, we posit that the Taroom Trough synclinal axis does not represent the original foredeep axis, which we propose was located farther east and was erosionally excised. The configurations of sand-prone depositional systems, and the preservation of upper Permian strata outside the structural basin boundaries, support the hypothesis that the original eastern depositional edge of the basin extended farther east than its current structural boundary. Similarly, truncation and westward onlap of formations along the western margin suggest that the basin's original western boundary lay beyond its present margin. Based on the truncated isochores and other criteria, we estimate that the preserved part of the basin is ~50% of its original area.</p>\u0000 </div>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"37 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143915598","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":"Crustal Segmentation Between Failed Rift and Successful Rifted Margin Along the NW South China Sea","authors":"Shihao Hao,&nbsp;Lianfu Mei,&nbsp;Guangrong Peng,&nbsp;Lili Zhang,&nbsp;Jing Wu,&nbsp;César R. Ranero","doi":"10.1111/bre.70029","DOIUrl":"10.1111/bre.70029","url":null,"abstract":"<div>\u0000 \u0000 <p>Most works propose a genetic “wide-rift” model for the northern South China Sea (SCS) rifted margin, where low-angle detachment faults accommodate significant deformation during crustal extension. However, a new seismic grid along the northern SCS shows along-strike changes in tectonics. At least two distinct tectonic domains, i.e., “wide-rift” Eastern Domain and “narrow-rift” Western Domain, have been revealed, which indicates that the current conceptual SCS rift models are likely too simplistic. Whereas, the Western Domain remains little explored because of the lack of available 3D seismic data and boreholes here. The 3D rift architecture in this tectonic domain is therefore inadequately constrained, which leads to insufficient knowledge of the syn-tectonic rift evolution in this region. Based on an unpublished 2D deep-penetration grid of seismic reflection sections, we have investigated the faulting style, sedimentary structure, and crustal architecture in the Western Domain of the mid-northern SCS. Our data display that the Western Domain contains the Changchang and Heshan Segments separated by a transfer fault zone. The aborted Changchang Segment is characterised by landward-dipping faults and younger T60 breakup unconformity. The neighbouring Heshan Segment, reaching the final continental breakup, is characterised by oceanward-dipping faults and older T70 breakup unconformity. The observations imply abrupt along-strike rifting changes not contemplated by current models, requiring unexplained crustal or mantle heterogeneity during extension.</p>\u0000 </div>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"37 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143890169","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":"Seismic Geomorphology of an Early Eocene Canyon-Channel-Lobe System North of Shetlands","authors":"Hans Jørgen Kjøll,&nbsp;Ivar Midtkandal,&nbsp;Ben Manton,&nbsp;Sverre Planke","doi":"10.1111/bre.70031","DOIUrl":"https://doi.org/10.1111/bre.70031","url":null,"abstract":"<p>Submarine canyon and channel systems are the primary paths for sediment transport from platforms to deep-sea terminal depositional fans and are present on all continental margins. The temporal morphological expression of such systems should be documented in order to fully understand the development of these important sediment pathways. We utilise a 3D seismic dataset from the northern Shetland Platform to the southern Møre Basin region and map two regionally continuous seismic horizons. The dataset includes an early Eocene northward-oriented canyon-channel system that allows high-resolution mapping of erosion and sedimentation. The morphology of the system allows a subdivision of platform, upper, middle, and lower slope, and basin floor. It is further subdivided from east to west according to the degree of erosive maturity. The platform contains channel shapes and their fill stretching from the south towards the platform edge and upper slope, where dendritic canyon heads developed. Scars in the canyon sidewalls indicate slope failure as an important widening mechanism. The slope canyons progressively shallow and widen basinward. At the canyon exits, deepwater submarine channels developed and continued onto the basin floor. We document progressive filling and overspilling of channels towards the terminal fan. The filling of the channels that resulted in overbank deposition is likely due to a decrease in slope gradient leading to an increased deposition rate that exceeds the channel capacity. Post-depositional differential compaction of the clastic channel fill and the surrounding muddy sediments causes the channel fills to form elongated ridges that lead towards the terminal fan. It is further shown that the morphological elements observed in the canyon-channel system adjust towards an equilibrium profile with a shallower gradient. These detailed observations provide an enhanced understanding of how canyon-channel systems develop on active margins and how sediment transport pathways are influenced by the submarine equilibrium profile and post-depositional processes.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"37 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/bre.70031","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892795","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}