Marine and Petroleum Geology最新文献

{"title":"Pore-scale visualization of thermally stimulated and depressurization-induced methane-hydrate decomposition in microfluidic chips","authors":"Wanli Xiong ,&nbsp;Yinfei Wang ,&nbsp;Xiangen Wu ,&nbsp;Lifu Zhang ,&nbsp;Taoran Song ,&nbsp;Zhe Wang ,&nbsp;Lin Wang ,&nbsp;Ziyi Wu ,&nbsp;Chuyang Chen ,&nbsp;Ruizhe Xu ,&nbsp;Yuyu Zhang","doi":"10.1016/j.marpetgeo.2025.107642","DOIUrl":"10.1016/j.marpetgeo.2025.107642","url":null,"abstract":"<div><div>Methane hydrate (MH) is an abundant unconventional gas resource whose safe and efficient exploitation is essential for easing the energy crisis and facilitating carbon-neutral targets. Here we employ transparent microfluidic chips to capture the pore-scale dynamics of MH decomposition driven by (i) controlled thermal stimulation and (ii) pressure drawdown. In both modes, decomposition initiates in the porous hydrate and lags in the crystalline hydrate, confirming the higher thermodynamic stability of crystalline hydrate. Under depressurisation (outlet pressure 1.0 bar, inlet pressure 96.0 bar), three successive stages are identified. Stage I: continuous-phase porous hydrate decomposes first; liberated methane then impinges on intact crystals, triggering secondary nucleation, flow deceleration and partial channel blockage. Stage II: alternating episodes of rapid decomposition and re-formation produce a prolonged stagnation period in which porous and crystalline hydrate repeatedly form and dissolve. Stage III: hydrate re-formation and decomposition occur in quick succession, repeatedly obstructing and reopening pore throats, generating abundant micro-/nano-bubbles (ranging from 2.26 to 37.8 μm) and ultimately leading to complete hydrate dissociation. Each of the three stages lasts approximately 20, 1150 and 170 min, respectively. Simultaneous evolution of the outlet pressure reveals that the pore-pressure field evolves in concert with the process of hydrate decomposition. During Stages I–II, the decomposition front remains near the outlet, connectivity is poor, and newly formed hydrate sustains a high differential pressure. Once the front advances toward the inlet (Stage III), connectivity improves rapidly; vigorous gas–liquid flow and cyclic hydrate conversion induce a step-wise pressure decline until full decomposition is achieved. This work presents the first direct, time-resolved visualization of MH breakdown at the pore scale, elucidating the interplay of thermal, hydraulic and phase-change processes governing gas production. These insights provide a quantitative framework for optimising temperature–pressure protocols in field-scale MH exploitation.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"183 ","pages":"Article 107642"},"PeriodicalIF":3.6,"publicationDate":"2025-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145364268","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":"Quantitative prediction of fracture distribution in deep conglomerate reservoirs of the Bozhong 19-6 South structure, offshore Bohai Bay Basin, East China: Insights from numerical simulation of multiphase strike-slip regimes","authors":"Liang Zhou ,&nbsp;Chao Deng ,&nbsp;Li-ya Da ,&nbsp;Yu Xia ,&nbsp;He-wei Hu ,&nbsp;Kai Ji ,&nbsp;Chang-yu Fan ,&nbsp;Yong Cheng ,&nbsp;Yu-jie Ning ,&nbsp;Xiao-fang Yang","doi":"10.1016/j.marpetgeo.2025.107644","DOIUrl":"10.1016/j.marpetgeo.2025.107644","url":null,"abstract":"<div><div>Fracture development and distribution within the BZ19-6 South (BZ19-6S) conglomerate reservoirs is dominantly controlled by Cenozoic multiphase strike-slip stress regimes, critically influencing hydrocarbon migration, accumulation, and sweet-spot distribution. This study characterizes these complex fracture systems by first reconstructing strike-slip superimposed activity during three key tectonic periods (middle Eocene, Oligocene, present-day) using balanced cross-sections, throw-depth plots, and growth indices integrated with regional dynamics. A 3D geological model was then constructed from seismic data, sedimentary microfacies, and paleo-tectonic restorations. Concurrently, a heterogeneous geomechanical model was developed using well logs and rock mechanics tests. Finite element simulations, constrained by loading stress magnitudes from acoustic emission experiments (as boundary conditions), reconstructed paleo- and present-day tectonic stress fields for each period. By considering the principles of fracture mechanics with wellbore fracture statistics, models for tensile/shear failure rates and linear fracture density were established to quantify fracture evolution. Validation against exploration-well data confirmed prediction accuracy, thereby guiding new well placement in high-fracture zones. Key findings: (1) Distinct strike-slip superimposed patterns across periods generated superimposed structural styles with variable geometries and intensities; (2) The Middle Eocene-Oligocene fractures were primarily controlled by burial depth, whereas present-day fractures are jointly co-governed by burial depth and strike-slip faults. This study advances deep reservoir fracture prediction through high-resolution tectonic staging and stress superposition analysis, providing a quantitative framework for fracture evaluation and reservoir development.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"183 ","pages":"Article 107644"},"PeriodicalIF":3.6,"publicationDate":"2025-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145418207","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 cycle-controlled hydrocarbon vertical migration through carbonates in the Ragusa Oil Field (SE Sicily, Italy)","authors":"Giovanni Barreca ,&nbsp;Salvatore Gambino ,&nbsp;Luca Smeraglia ,&nbsp;Andrea Billi ,&nbsp;Eugenio Carminati ,&nbsp;Giovanni Cassarino","doi":"10.1016/j.marpetgeo.2025.107640","DOIUrl":"10.1016/j.marpetgeo.2025.107640","url":null,"abstract":"<div><div>Hydrocarbon seepage at the Earth's surface provides crucial insights into subsurface petroleum systems. This study investigates the role of seismic cycle dynamics in controlling vertical hydrocarbon migration by studying the Ragusa Oil Field, a long-exploited petroleum district in the Hyblean foreland domain of south-eastern Sicily (Italy). Inspired by oil spilling in the area that followed a seismic sequence in February 2016, a multiscale structural analysis was undertaken to explore the relationship between fault activity and oil mobilization. This study integrates mesoscale structural measurements, microstructural analysis of bitumen-bearing fault breccias, and 3D Dilation Tendency modelling under paleo- and present-day stress conditions to build a dynamic model of upward hydrocarbon migration and seepage at the Earth's surface during the seismic cycle in carbonate-hosted normal faults in a foreland setting. Evidence from abandoned asphalt mines and active seep sites reveals both stratigraphic layer-impregnation and localized fault/fracture-controlled oil pathways. Field observation and Dilation Tendency analysis indicate that vertical hydrocarbon migration may predominantly occur by fractures instability during seismic rupture allowing overpressured fluids to migrate vertically, mainly at fault intersections. These findings highlight the role of seismic deformation in controlling fractures instability and transient permeability changes which, in turn, facilitate hydrocarbon mobilization and leakage. Calcite clast aggregates within hydrocarbon-filled voids observed during microstructural investigations confirm episodic, pressure-driven fluidization consistent with co-seismic mobilization. Stratigraphic evidence of repeated seepage events in Quaternary alluvial deposits supports a model of cyclic hydrocarbon migration linked to stress variations during the seismic cycle. The novelty of this paper is that we document an hydrocarbon seepage process associated with modern seismicity, filling the gap of previous observations of hydrocarbon seepage speculatively associated with fossil earthquakes without a direct cause-effect link.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"183 ","pages":"Article 107640"},"PeriodicalIF":3.6,"publicationDate":"2025-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145364275","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":"Integrated analysis of controls on deformation sequences of the thin-skinned fold-and-thrust belt in the eastern Sichuan Basin, China","authors":"Yanxian Zhu ,&nbsp;Zhiliang He ,&nbsp;Xiaowen Guo ,&nbsp;Ze Tao ,&nbsp;Pengjie Hu ,&nbsp;Wen Zhao ,&nbsp;Hanyu Zhu","doi":"10.1016/j.marpetgeo.2025.107641","DOIUrl":"10.1016/j.marpetgeo.2025.107641","url":null,"abstract":"<div><div>Understanding the deformation sequences of fold-and-thrust belts is crucial for deciphering orogenic processes and evaluating resource potential. Previous studies document that the thin-skinned eastern Sichuan fold-and-thrust belt, between the Tibetan Plateau and the Jiangnan-Xuefeng orogen, evolved through stepwise progressive deformation propagation in the Mesozoic and subsequent reactivation in the Cenozoic. However, recent U-Pb dating of syn-tectonic calcite veins and statistical analysis of thermochronological data reveal an out-of-sequence deformation history, contradicting the prevailing progressive deformation process. This study integrates multidisciplinary approaches including seismic section interpretation, apatite fission-track analysis and sequential cross-section restoration, to investigate its deformation sequences and controlling factors. The results show distinct deformation sequences during three deformation stages. The first deformation stage commenced at 135 Ma with the formation of the Qiyueshan anticline along the southeastern margin, followed by the development of the Huayingshan Fault-related fold at ∼120 Ma along the northwestern margin. Deformation propagated from its southeastern and northwestern boundaries to the center along the Cambrian Longwangmiao-Gaotai Formation evaporites until 100 Ma. This produced tectonic wedges and fault-propagation folds under the NW-directed compression from the Paleo-Pacific subduction and SE-directed counterforce along the pre-existing Huayingshan Fault. The second stage involved NW-directed stepwise progressive deformation propagation with hybrid thrust sequence along the Silurian shales from 100 Ma to 70 Ma, reactivating earlier thrusts and tectonic wedges under continued compression from the Paleo-Pacific subduction. The third stage is characterized by regional simultaneous uplift with limited deformation from 20 Ma to the present, as rigid basement and discontinuous décollements impeded SE-directed compression from the eastward growth of the Tibetan Plateau in the Cenozoic. These results indicate that the deformation sequences and patterns of eastern Sichuan fold-and-thrust belt were controlled by pre-existing structures, basement properties, multiple décollements and convergence direction. This finding provides valuable insights for resource exploration in the study area and enhances our understanding of intracontinental orogenic deformation processes globally.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"183 ","pages":"Article 107641"},"PeriodicalIF":3.6,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145364271","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":"Superposed deformation in the southern gulf of Suez rift and impact on hydrocarbon maturation","authors":"Samy K. Moawad ,&nbsp;Adel R. Moustafa ,&nbsp;Hany M. Helmy","doi":"10.1016/j.marpetgeo.2025.107639","DOIUrl":"10.1016/j.marpetgeo.2025.107639","url":null,"abstract":"<div><div>Previous studies of the Gulf of Suez rift show a main subsidence phase in the Burdigalian during deposition of the lower Rudeis Formation followed by slow subsidence afterwards. By contrast, the southern part of the rift shows continued deformation and subsidence since the Late Miocene evidenced by continued faulting as well as deposition of larger thicknesses of the Upper Miocene evaporites and post-Miocene sediments. Present-day deformation is manifested by recent seismicity in the southern part of the rift as well as faulting of the seabed forming a deepwater area. Additional extension in the southern part of the rift is attributed to the effect of the nearby Dead Sea Transform. This led to increased crustal thinning and higher heat flow, causing more maturation of the hydrocarbon source rocks indicated by high API gravity oil with the presence of a primary gas cap. Continued extension in the nearby northern Red Sea area is expected to lead to higher magnitudes of heat flow. This would enhance the maturation of hydrocarbon source rocks, turning the Red Sea marginal basins into potential gas or gas/light oil provinces. This study provides new considerations for the tectonic history of the southern Gulf of Suez rift that influences the petroleum system evaluation both in the southern Gulf of Suez and the northern Red Sea basins.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"183 ","pages":"Article 107639"},"PeriodicalIF":3.6,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145364269","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":"Lower Paleozoic salt diapirs in the northern part of the West Siberian Basin and the Enisey-Khatanga Trough: structural setting and petroleum habitat","authors":"Konstantin Sobornov","doi":"10.1016/j.marpetgeo.2025.107638","DOIUrl":"10.1016/j.marpetgeo.2025.107638","url":null,"abstract":"<div><div>Seismic data from the northern part of the West Siberian Basin and the Enisey-Khatanga Trough indicates the presence of up to 15 km-thick Paleozoic sediments underlying the Mesozoic overburden. This finding challenges the traditional notion that folded Paleozoic rocks constitute the economic basement of the basin. The Paleozoic section comprises evaporitic units, most likely of Ordovician age, which were deposited in troughs formed during the Early Paleozoic Uralian rifting. A reinterpretation of the geological structure suggests that salt tectonics has significantly influenced the subsurface architecture of these regions. Seismic evidence for salt diapirs includes (1) significant heights of salt structures (5 km or more), (2) seismic transparency, (3) minibasin tectonostratigraphic successions flanking the salt structures, and (4) radial fault systems in the overlying deposits. Additional evidence for the occurrence of salt diapirs includes magnetic, gravimetric, thermal, electrical, and topographic anomalies. Minibasin tectonostratigraphic successions suggest that diapirism began soon after salt deposition, preceding the onset of the Late Paleozoic compression. Far-field intracratonic deformations modified salt structures during the Mesozoic-Cenozoic, including extensional episodes in the Early Triassic and Early-Middle Jurassic and contractional episodes in the Late Triassic, Early Cretaceous, and the Late Cenozoic. These events led to folding of post-salt strata, which was accompanied by continuous differential compaction and Quaternary post-glacial rebound of diapirs. These processes amplified anticlines in post-salt Cretaceous reservoirs, which host giant gas accumulations.</div><div>The thick and thermally mature Paleozoic deposits include source rocks, which likely significantly contributed to the region's hydrocarbon potential. The upward migration of hydrocarbons through salt structures, from the deeply buried Paleozoic section into the Mesozoic overburden, provides a plausible explanation for the long-debated origin of the abundant gas content in Cretaceous deposits.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"183 ","pages":"Article 107638"},"PeriodicalIF":3.6,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145322318","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":"Advanced digital techniques applied to outcrop models: Integrating Local Binary Pattern (LBP) and Convolutional Neural Network (CNN) to support stratigraphic and sedimentological interpretation of reservoir analogs in the Salta Basin, Argentina","authors":"Eduardo Roemers-Oliveira ,&nbsp;Sophie Viseur ,&nbsp;François Fournier ,&nbsp;Ítalo Gomes Gonçalves ,&nbsp;Felipe Guadagnin ,&nbsp;Guilherme Pederneiras Raja Gabaglia ,&nbsp;Ednilson Bento Freire ,&nbsp;Daniel Galvão Carnier Fragoso ,&nbsp;Juan Ignacio Hernández ,&nbsp;Ana Clara Freccia ,&nbsp;Guilherme de Godoy Rangel","doi":"10.1016/j.marpetgeo.2025.107623","DOIUrl":"10.1016/j.marpetgeo.2025.107623","url":null,"abstract":"<div><div>Digital Outcrop Models (DOMs), empowered by advanced digital techniques, have revolutionized the study of outcrop analogs for petroleum reservoir characterization by enabling the extraction of key quantitative parameters for modeling. The limited availability of subsurface data often constrains reservoir characterization, making outcrop analogs essential tools for improving geological models. The analogs bridge the gap between borehole-derived information and regional-scale seismic data, providing crucial mesoscale insights. In this context, this study proposes an integrative workflow combining high-resolution sequence stratigraphy (HRSS) with digital techniques to enhance the understanding of depositional settings and extract data from the Balbuena III Sequence of the Salta Basin, Argentina, a well-established stratigraphic basin analog for Brazilian pre-salt carbonate reservoirs. The workflow combines traditional field-based methods with advanced digital techniques applied to photogrammetric data, including Local Binary Pattern (LBP) analysis and Convolutional Neural Networks (CNNs). LBP analysis correlated with stratigraphic interpretation demonstrated promising potential for characterizing the high-frequency cyclicity observed in the study area. CNN-based segmentation classified and delineated eleven lithofacies, including carbonate, siliciclastic, mixed, and volcanic facies. This segmentation allows for the generation of lithofacies-classified 3D point clouds and a detailed spatial representation of facies distribution across the outcrop. Digital approaches enable more in-depth analysis by increasing efficiency, accuracy, and the capacity to analyze large datasets. By combining digital and traditional methods, this work improves the analysis of outcrop analogs, which contributes to more accurate geological modeling and enhances the predictive capability of petroleum fields and hydrocarbon recovery.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"183 ","pages":"Article 107623"},"PeriodicalIF":3.6,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145322816","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":"Comprehensive site screening and selection for offshore CO2 storage in the Early Miocene formations of the eastern Gunsan Basin, Yellow Sea","authors":"Kyoung-Jin Kim ,&nbsp;Moohee Kang ,&nbsp;Snons Cheong ,&nbsp;Kue-Young Kim ,&nbsp;In-Sun Song ,&nbsp;Kwanghyun Kim","doi":"10.1016/j.marpetgeo.2025.107621","DOIUrl":"10.1016/j.marpetgeo.2025.107621","url":null,"abstract":"<div><div>We employed a site screening framework to select potential CCS sites within the Early Miocene formations of the eastern Gunsan Basin in the Yellow Sea, offshore South Korea, by incorporating subsurface data. The site screening process, comprising stratigraphic and structural interpretation, gross depositional environment mapping, and common risk segment mapping, revealed three potential areas for CO₂ geological storage: SA1, SA2, and SA3 in the north, center, and south, respectively. SA1 was the most favorable site, considering its substantial sand potential and geologically stable environment. Prospective CO₂ storage resources for SA1 were estimated using geological static modeling and the CO₂-SCREEN tool, yielding a best estimate (P50) in the range of 420–459 MtCO₂. Pressure-constrained storage resource was also evaluated using EASiTool V5.0, which accounts for realistic injectivity and operational limitations, resulting in a more conservative P50 estimate of 91.9 MtCO₂. This study highlights significant potential for CO₂ storage in the Early Miocene formation of the eastern Gunsan Basin, to secure additional CO₂ storage resources and achieve the 2030 nationally determined contribution and 2050 net zero greenhouse gas emission targets. The applied site screening framework can serve as a transferable approach for evaluating CO₂ storage in offshore basins globally.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"183 ","pages":"Article 107621"},"PeriodicalIF":3.6,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145322316","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":"Influence of contour currents on the flow dynamics and deposition patterns of turbidity currents in deep-sea channels","authors":"Junkai Sun ,&nbsp;Xiaolei Liu ,&nbsp;Chenglin Gong ,&nbsp;Xingsen Guo ,&nbsp;Yang Lu ,&nbsp;Yijie Zhu","doi":"10.1016/j.marpetgeo.2025.107622","DOIUrl":"10.1016/j.marpetgeo.2025.107622","url":null,"abstract":"<div><div>Contour currents alter the movement and deposition of turbidity currents, forming a mixed turbidite-contourite system that is essential for the cross-shelf transport of material and energy, as well as the formation and evolution of submarine canyons and channels. However, the specific details of the interaction processes remain unclear due to limited field observations and potential biases in interpretations based on sedimentary results. This numerical study investigates turbidity current-contour currents interactions by analyzing flow dynamics and deposition patterns. Without contour currents, turbidity currents predominantly flow along the channel centerline with minor deviations, exhibiting nearly symmetrical overspill on both sides. The presence of contour currents leads to the coexistence of blocked overspill on the up-current channel side, tractional transport of fine-grained sediments on the down-current channel side, and enhanced Kelvin–Helmholtz (K-H) waves within the channel. The erosion of the down-current channel side is facilitated by the intensified K-H waves, while its deposition is concurrently promoted by the tractional transport of fine-grained sediments. In this simulation, the influence of tractional transport of fine-grained sediments surpasses that of K-H waves, as the calculated additional deposition rate exceeds the additional erosion rate, resulting in an up-current migrating channel. However, variations in parameters of the turbidity currents, contour currents, and topography may allow K-H waves to dominate, potentially leading to a down-current migrating channel. Considering the competition between these two effects, this paper proposes a novel mechanism for the interaction between turbidity currents and contour currents. This offers new insights into the formation of unidirectional migrating channels and provides valuable references for the study of deep-sea canyon geomorphological evolution and hydrocarbon resource exploration.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"183 ","pages":"Article 107622"},"PeriodicalIF":3.6,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145270614","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":"A mud-filled submarine canyon cutting through a sand-prone turbidite succession: A Lower Oligocene field analogue of stratigraphic-structural trap in the Western Alpine Foreland Basin, France","authors":"Louison Mercier ,&nbsp;Sébastien Migeon ,&nbsp;Jean-Loup Rubino ,&nbsp;Yamirka Rojas-Agramonte ,&nbsp;Anna Hagen ,&nbsp;Romain Bousquet ,&nbsp;Regina Mertz-Kraus","doi":"10.1016/j.marpetgeo.2025.107620","DOIUrl":"10.1016/j.marpetgeo.2025.107620","url":null,"abstract":"<div><div>Submarine canyons are key elements of the evolution of convergent margins. Their infilling can be mud-prone and thus represents a good seal if they cut through reservoir series, this erosion phase may be enhanced by tectonic activity. The present study focuses on the Western Alpine Foreland Basin where we use the outcrops of the Schistes à Blocs Formation to study the syn-tectonic evolution of a Lower Oligocene submarine canyon that cuts through the Annot Sandstones Formation. The Intra Schistes à Blocs Erosion Surface (ISaBES) has been mapped in the field. Airborne and drone pictures were also used. Moreover, the deposition model and the stratigraphic architecture of the canyon-fill were reconstructed from the analysis of seven sedimentary logs cumulating 410 m of series, particularly crossing the under described Schistes Bruns Member. The sedimentary system of this lower unit of the canyon-fill has been also constrained by the measurement of paleocurrents, and the provenance analysis of detrital zircons from four samples. The paleocurrent measurements on the unidirectional ripples deposited within the Schistes Bruns Member is witness of a turbulent flow rebound against the steep northern flank of the canyon, during the construction of internal levees which often experimented gravity collapse. Slumping of internal levees improves the seal properties of the canyon-fill, while the canyon thalweg was dominated by by-pass processes. Detrital zircons reveal that the provenance of the Schistes Bruns Member is sourced by the same sedimentary system of the Annot Sandstones Formation. Thus, we interpreted that both the canyon excavation and the sediment by-pass within its thalweg during the deposition of the Schistes Bruns Member, were triggered by an increase in basin slope related to the tectonic evolution of the accretionary prism. Finally, the ISaBES is a composite and diachronous surface resulting both from the morphology of the internal levees, and from their reworking during the deposition of the olistostromes of the Schistes à Blocs Exotiques Member, that predates the emplacement of the Alpine nappes within the foreland basin.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"183 ","pages":"Article 107620"},"PeriodicalIF":3.6,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145322317","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}