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":"2026-01-01","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":"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":"2026-01-01","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":"Global-scale AI-powered prediction of hydrogen seeps","authors":"V. Roche ,&nbsp;J. Daynac ,&nbsp;S. Hesni ,&nbsp;U. Geymond ,&nbsp;N. Ginzburg ,&nbsp;J. Philippon ,&nbsp;I. Moretti","doi":"10.1016/j.marpetgeo.2025.107617","DOIUrl":"10.1016/j.marpetgeo.2025.107617","url":null,"abstract":"<div><div>Natural hydrogen (H₂) holds promising potential as a clean energy source, but its exploration remains challenging due to limited knowledge and a lack of quantitative tools. In this context, identifying active H₂ seepage areas is crucial for advancing exploration efforts. Here, we focus on <em>sub-circular depressions</em> (SCDs) that often mark high H₂ concentration in soils, thought to correspond to deeper fluxes seeping at the surface, making them promising targets for exploration. Coupling open-access Google Earth© images and in-field H₂ measurement data, an artificial intelligence model was trained to detect seepage zones. The model achieves an average precision of 95 %, detects and maps seepage zones in new regions like Kazakhstan and South Africa, highlighting its potential for global application. Moreover, preliminary spatial analyses show that geological features control the distribution of H₂-SCDs that can emit billions of tons of H₂ at the scale of a sedimentary basin. This study paves the way for a faster and more efficient methodology for selecting H₂ exploration targets.</div><div>Plain Language Summary.</div><div>Natural hydrogen is a promising clean energy source, but it remains difficult to explore due to a lack of accessible tools. In this study, we used free satellite images (Google Earth©) and in-field hydrogen measurements to identify specific surface features - small <em>sub-circular depressions</em> (SCDs) - that often mark areas where hydrogen is seeping from underground. We trained an artificial intelligence model to detect these depressions, using a dataset of confirmed hydrogen-emitting SCDs collected across five countries. Thanks to this diversity in the training data, the model can be applied at a global scale, having learned to recognize a wide variety of structures associated with hydrogen seepage. To validate its effectiveness, the model was tested on two random regions - in Kazakhstan and South Africa - and successfully identified over a thousand new potential hydrogen-emitting depressions. With an average precision of 95 %, this tool offers a fast and reliable way to map natural hydrogen seepage zones, helping guide future exploration efforts worldwide.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"183 ","pages":"Article 107617"},"PeriodicalIF":3.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145322768","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":"Chronostratigraphy and petrophysical properties for the middle to late Miocene sediments in the shelf to abyssal plain of the Ulleung Basin, Korea","authors":"Hyun Suk Lee ,&nbsp;Soonmi Cho ,&nbsp;Junghee Son ,&nbsp;Gihun Song ,&nbsp;Juhyeon Oh ,&nbsp;Wonjun Kwak","doi":"10.1016/j.marpetgeo.2025.107650","DOIUrl":"10.1016/j.marpetgeo.2025.107650","url":null,"abstract":"<div><div>This study presents the first comprehensive chronostratigraphic framework for the Miocene sediments in the entire Ulleung Basin by integrating zircon U-Pb geochronology, seismic stratigraphy, and petrophysical analyses. The comparison between zircon dating and biostratigraphic constraints enhances the precision of stratigraphic correlations. Total eight maximum depositional ages derived from conventional and sidewall cores from the basin provide refined temporal resolution for key stratigraphic units, enabling a more accurate reconstruction of sedimentary processes and basin evolution during the Miocene. Petrophysical analyses along the synchronous horizons of maximum depositional ages reveal significant variations in shale volume, effective porosity, and Net-to-Gross ratio, reflecting the influence of depositional environments and diagenetic modifications on rock properties. In particular, porosity variations are predominantly influenced by depositional ages and environments as well as burial diagenesis. The results of this study enhance our understanding of the geological history and resource potential in the Ulleung Basin, serving as a foundation for future research on regional stratigraphy, hydrocarbon exploration, and reservoir characterization. Furthermore, this study highlights the importance of integrating high-resolution geochronological methods with petrophysical evaluations to enhance assessments of hydrocarbon resources and CO₂ storage capacity.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"183 ","pages":"Article 107650"},"PeriodicalIF":3.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145526189","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":"2026-01-01","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":"Three-dimensional stratigraphic forward modeling for the prediction of facies associations and porosity in pre-salt carbonate rocks of the Sapinhoá oil field, Santos Basin, Brazil","authors":"Vinícius Lôndero ,&nbsp;Andressa Bressane ,&nbsp;Márcio Cardoso Jr. ,&nbsp;Luciano Garcia Garim ,&nbsp;José Manuel Marques Teixeira de Oliveira ,&nbsp;Ilana Lehn ,&nbsp;Adali Ricardo Spadini ,&nbsp;Lubín Eric Cayo ,&nbsp;Samuel Magalhães Viana ,&nbsp;José Eduardo Faccion ,&nbsp;Paulo Roberto Moura de Carvalho ,&nbsp;Roberto Salvador Francisco D’Avila ,&nbsp;Ariane Santos da Silveira","doi":"10.1016/j.marpetgeo.2025.107645","DOIUrl":"10.1016/j.marpetgeo.2025.107645","url":null,"abstract":"<div><div>Pre-salt reservoir quality prediction is a complex task that demands alternative studies to better estimate its physical properties. The Barra Velha Formation (Aptian) in the Sapinhoá field, Santos Basin, presents carbonate rocks with a high degree of heterogeneity in their lateral and vertical distributions. Wells are confined mostly to the structural high area, and the seismic lacks vertical resolution; thus, forward stratigraphic modeling can be a good alternative to represent this complex depositional system at a sub-seismic scale. The simulation was performed in the software StratBR, a stratigraphic forward-modeling software developed by Petrobras that performs rule-based simulations. The simulation consisted of 200 time steps ranging from the base of the Barra Velha Formation (123 Ma) to its upper limit at the salt base (113 Ma). Water depth and wave energy were used as proxies for facies association distribution, filling the available depositional space for each time step, calculated by the backstripping method. This simulated facies association model was then used to calculate porosity properties with the fuzzy method, using each facies association porosity distribution and patterns of spatial porosity variation as inputs. The facies association model is compatible with the geometry and depositional patterns observed in the seismic, with a mean well accuracy of 56.28%. The porosity model reproduced spatial property changes, both laterally and vertically, throughout the study area. Both models operate at sub-seismic scale and provide complementary results for the characterization and prediction of essential properties in future oil and gas exploratory prospects.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"183 ","pages":"Article 107645"},"PeriodicalIF":3.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145526187","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 biomarker signatures in the Niujiaotang sulfide ore field: Exploring the role of organic matter in ore formation","authors":"Yong Cheng ,&nbsp;Jia-Xi Zhou ,&nbsp;Yuzhao Hu ,&nbsp;Saihua Xu ,&nbsp;Shengbao Shi ,&nbsp;Yiming Wen ,&nbsp;Qi Nie ,&nbsp;Ye Zhou ,&nbsp;Kai Luo ,&nbsp;Xiaolin Tan ,&nbsp;Liang Zhou ,&nbsp;Yadong Li ,&nbsp;Yang Liu ,&nbsp;Xiaoliang Zhang","doi":"10.1016/j.marpetgeo.2025.107616","DOIUrl":"10.1016/j.marpetgeo.2025.107616","url":null,"abstract":"<div><div>The Niujiaotang Mississippi Valley-Type (MVT) Pb–Zn deposit (SW China) hosts 0.35 Mt Zn (5.85–24.48 wt%) and 5.3 kt Cd (0.04–1.43 wt%). Although previous inorganic geochemical studies have indicated a significant role of organic matter in mineralization, critical organic geochemical evidence is still lacking. This study presents the first integrated biomarker investigation of solid bitumen derived from the host rock of the deposit, clarifying the sources of organic matter, its thermal evolution, and metallogenic implications. Hydrothermal alteration assessments reveal that biomarker distributions have undergone only mild biodegradation and reliably preserved source and maturity information. Multiple maturity proxies indicate an over-mature stage (&gt;150 °C), which meets the thermal requirement for thermochemical sulfate reduction (TSR). Saturated and aromatic hydrocarbon fingerprints, combined with carbon-isotope data, demonstrate derivation from Lower Cambrian source rocks dominated by marine algal/bacterial organic matter with minor terrestrial higher-plant input. The relative abundances of dibenzothiophene series compounds (5.84–9.54 %, mean 7.27 %) versus biphenyls (1.77–7.01 %, mean 4.62 %) provide robust molecular evidence for extensive TSR reactions. This study strengthens the interpretation that sulfur-rich hydrocarbons act as the principal reductant in TSR, facilitating the conversion of stratal sulfate to H₂S and thereby establishing the reduced sulfur reservoir essential for Pb–Zn precipitation. Macroscopic intergrowths of solid bitumen with sulfide and carbonate gangue, alongside microscopic hydrocarbon inclusions in sphalerite and dolomite, corroborate this model. These organic-geochemical constraints refine genetic concepts for MVT deposits and emphasize the value of integrating petroleum system analysis into exploration workflows for analogous Pb–Zn systems.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"183 ","pages":"Article 107616"},"PeriodicalIF":3.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227566","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 evolution of rift grabens in the Mozambique Coastal Plain, with focus on the Zualane Graben – Southern Mozambique","authors":"Dércio Levy José ,&nbsp;Zélio Chaúque ,&nbsp;Osvaldo Cabral ,&nbsp;Mónica Juvane ,&nbsp;Rudêncio Morais ,&nbsp;Wilfried Jokat","doi":"10.1016/j.marpetgeo.2025.107643","DOIUrl":"10.1016/j.marpetgeo.2025.107643","url":null,"abstract":"<div><div>The topography of the Mozambique Coastal Plains is characterized by several grabens developed over a Mid Jurassic (Oxfordian - Kimmeridgian) volcano-sedimentary sequence, which forms the acoustic basement. These grabens, including the Zualane Graben are collectively termed the Inner Graben System (MCP Graben System in this study), strike predominantly NNW-SSE and N-S, and less commonly E-W. Most of them formed during Gondwana fragmentation from Upper Jurassic (Kimmeridgian-Tithonian?) to Lower Cretaceous (Berriasian to Hauterivian?-Barremian) times. The youngest grabens have a Late Miocene age. Often the upper part of the acoustic basement, named Stormberg volcanics, form buried volcanoes characterized by conical shapes and positive magnetic anomalies. Some of these volcanoes are aligned along the shoulders of the West and East Changani Grabens suggesting an off-rift volcanism setting. During the development of the western branch of the East African Rift System the Zualane Graben suffered an eastward horizontal displacement of approximately 20 km and was split into two segments, the Southern and Northern Zualane Graben. A stratigraphic comparison of the Zualane, Mazenga and Xai-Xai grabens revealed that all three were affected by multiple rifting events. This suggests that the grabens developed along a potential paleo Late Jurassic rifting axis, which has a N-S orientation, located along the eastern margin of the Mozambique Coastal Plains. Oil inclusions and gas shows were reported from two wells of the drill sites, and recent gas discoveries in the neighboring PT5-C concession, indicate that matured source rocks do exist in the study area or in the vicinity.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"183 ","pages":"Article 107643"},"PeriodicalIF":3.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145418188","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":"2026-01-01","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":"What scientific ocean drilling has taught us about the permeability of marine sediments","authors":"Hugh Daigle ,&nbsp;Eli Cable ,&nbsp;Carlos Figueroa-Diaz ,&nbsp;Jordan Jee ,&nbsp;Aidan Pyrcz","doi":"10.1016/j.marpetgeo.2025.107632","DOIUrl":"10.1016/j.marpetgeo.2025.107632","url":null,"abstract":"<div><div>Scientific ocean drilling has provided a significant amount of information about the marine subsurface over the last 57 years, including samples and data pertaining to physical properties, geochemistry, microbiology, lithology, stratigraphy, and structural geology. Our understanding of subsurface mass transport has benefited from many hundreds of permeability measurements performed on scientific ocean drilling samples. We assembled a database of 836 permeability measurements along with other physical properties measured shipboard, including determinations of porosity and grain density from moisture and density (MAD) measurements, natural gamma radiation and magnetic susceptibility from multisensory core logger (MSCL) measurements, total carbonate content, and lithological description, silt percentage, and clay percentage from smear slides. The goals of our study were assessing the state of our understanding of marine sediment permeability, assessing processes that control permeability, and the best ways to leverage legacy ocean drilling samples and datasets to improve our understanding of the subsurface. We found that the majority of permeability samples (71 %) come from the Pacific Ocean, particularly its active margins; that clays and silts are the most frequently tested lithologies; that the depth distribution of samples is similar to the overall depth distribution of drilled holes, indicating that the data are not biased towards particular depth ranges; and that the permeabilities obtained span nearly 11 orders of magnitude. We observed weak to no correlation between permeability and the physical properties we considered, but we were able to train a random forest regression model to predict permeability within about half an order of magnitude based on measurements that were performed previously or can be obtained from unpreserved, legacy cores. This presents an opportunity to be able to predict permeability in more locations globally and answer research questions about fluid flow and pore pressure.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"183 ","pages":"Article 107632"},"PeriodicalIF":3.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145270562","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}