Sedimentary Geology最新文献

{"title":"Multi-phase tectonic evolution regulating multi-source provenance and spatio-temporal sedimentary migration in the Middle-Upper Ordovician, Tarim Basin (NW China)","authors":"Qian Liu ,&nbsp;Jun Wu ,&nbsp;Tailiang Fan ,&nbsp;Pengfei Wu ,&nbsp;Weiguo Zhang ,&nbsp;Suju Yang ,&nbsp;Qinqi Xu ,&nbsp;Yongtao Xia ,&nbsp;Mingjie Lan","doi":"10.1016/j.sedgeo.2026.107030","DOIUrl":"10.1016/j.sedgeo.2026.107030","url":null,"abstract":"<div><div>The Middle-Upper Ordovician succession in the Tarim Basin documents the evolution of a “reactivated cratonic basin” during the transition from a passive to a collisional continental margin. Deep exploration is hindered by extreme burial depths, limited seismic resolution, and unclear tectonic-sedimentary coupling mechanisms. This study integrates outcrops, cores, well logs, seismic data, and geochemical analyses to establish a high-resolution sequence stratigraphic framework, reconstruct the provenance evolution history, and decipher the spatio-temporal migration of sedimentary systems. Five third-order sequences (SQ1–SQ5) were identified: SQ1—upper Yijianfang and Qiaerbake Formations; SQ2—Lianglitage and lower Sangtamu Formations; SQ3–SQ5—middle–upper Sangtamu Formation. Provenance evolution exhibits a clear tectonically controlled three-stage pattern: during SQ1–SQ2, extra-basinal sources dominated, primarily from the Altyn Orogenic Belt, driven by its east-west “scissor-like” oblique collision; SQ3 was a mixed-source stage with contributions from both the Altyn Orogenic Belt and the Tazhong and Tabei paleo-uplifts, responding to intensified arc-continent collision and intra-basinal tectonic activation; SQ4–SQ5 transitioned to intra-basinal source dominance. The evolution of sedimentary systems was jointly controlled by the coupling of extra-basinal and intra-basinal tectonic dynamics, tectonically driven provenance migration, and relative sea-level fluctuations, overall showing a transition from deep-water gravity flow systems to shallow-water deltaic systems: (1) SQ1–SQ2 featured eastern submarine fans and western carbonate platforms; (2) SQ3 saw expanded eastern submarine fans and newly developed western slope turbidite fans; (3) SQ4–SQ5 were dominated by a basin-center “shelf to shelf-edge delta” system, with gradual shrinkage of the eastern deep-water fans. This study clarifies the core coupling mechanism of “tectonic activation driving provenance transformation, which in turn controls sequence distribution and sedimentary migration,” and establishes a “reactivated cratonic basin” sedimentary evolution model applicable to the Tarim type. The research results provide an important reference for the tectonic-sedimentary analysis of intracratonic collisional basins globally.</div></div>","PeriodicalId":21575,"journal":{"name":"Sedimentary Geology","volume":"493 ","pages":"Article 107030"},"PeriodicalIF":2.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145981697","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 novel mechanism of uranium mineralization: The role of zircon adsorption at the Qigequan deposit, Qaidam Basin, NW China","authors":"Yi-Han Lin ,&nbsp;Ming-Sen Fan ,&nbsp;Pei Ni ,&nbsp;Jun-Yi Pan ,&nbsp;Zhe Chi ,&nbsp;Zhi-Lin Cheng ,&nbsp;Wen-Yi Wu ,&nbsp;Chen Zhang ,&nbsp;Bing-De Qi ,&nbsp;Xue-Bin Wei","doi":"10.1016/j.sedgeo.2026.107027","DOIUrl":"10.1016/j.sedgeo.2026.107027","url":null,"abstract":"<div><div>Uranium mineralization in sandstone-hosted deposits is influenced by the adsorption capacity of minerals, especially in basin fluids with sub-saturation uranium concentrations. This study investigates the Qigequan sandstone-type uranium deposit in the Qaidam Basin, focusing on uranium distribution and adsorption behavior in zircon. Samples were analyzed using TIMA, BSE, CL imaging, EDS, and EPMA. Results show zircon is abundant in both matrix and clastic components, with uranium occurring in three forms: U1 (in growth zones or inclusions), U2 (in fractures), and U3 (on grain rims). U1 is a magmatic or early hydrothermal product with low U/Th, while U2 and U3 are associated with surface adsorption by mineralizing fluids and have high U/Th. By contrast, uranium minerals unrelated to zircon (i.e., Other-U) have different Th and U characteristics. EPMA mapping reveals that absorbed uranium around rims correlates with elements like Th, Y, Mg, and Ti. Zircon demonstrates a stronger and more selective uranium adsorption capacity than other accessory minerals, despite their higher abundance. We suggest that uranium is absorbed by zircon through a physical-chemical adsorption mechanism, primarily controlled by pH changes caused by the mixing of mildly alkaline oil-gas-related fluids and supergene oxidized fluids. These findings highlight the significant role of zircon as a uranium adsorbent in sandstone-hosted uranium deposits and suggest that surface adsorption, in addition to classical precipitation due to fluid supersaturation, is an important pathway for uranium enrichment. This mechanism offers new insights into uranium mineralization and may refine genetic models of sandstone-type uranium deposits.</div></div>","PeriodicalId":21575,"journal":{"name":"Sedimentary Geology","volume":"493 ","pages":"Article 107027"},"PeriodicalIF":2.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145950266","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":"Steep nested clinoforms in the mixed siliciclastic‐carbonate Eocene Sobrarbe Deltaic Complex, Aínsa Basin, Spain","authors":"Leticia Rodriguez-Blanco ,&nbsp;Miquel Poyatos-Moré ,&nbsp;Ivar Midtkandal ,&nbsp;Ingrid Anell","doi":"10.1016/j.sedgeo.2025.107019","DOIUrl":"10.1016/j.sedgeo.2025.107019","url":null,"abstract":"<div><div>This study investigates and discusses the processes controlling the development of nested clinoforms in outcrops of the Eocene Sobrarbe Deltaic Complex of the Aínsa Basin, and demonstrates that early cementation in fine-grained sediments can help preserving steep deltaic foresets. Small-scale clinoforms (few 10s of m thick, few 100s of m long) record the higher-frequency cycles of delta progradation and the coetaneous development of a carbonate factory, while large-scale clinoforms (several 10s of m thick, few km long) record longer-term high-energy processes on the shelf and slope, including the reworking of previous deltaic/shelf deposits. Detailed lithological analysis across three of the high-frequency cycles reveals a downdip transition along the small-scale clinothems from subaqueous channels to distal delta front and shelf settings. The coarsest grain sizes are restricted to the proximal delta plain deposits evidencing some periods of limited coarse sediment transfer to deeper waters, enabling the development of coeval carbonate production on the delta front/shelf. Early cementation of carbonate-rich horizons preserved the relatively steep, yet fine-grained clinoform slopes and prevented their collapse. Observation of steep cemented foresets in fine-grained lithologies challenges a univocal relation between delta slope and grain size. In addition, we propose that early cementation is linked to in-situ carbonate production, which implies faunal adaptation probably favored by hiatuses in sedimentation between successive stages of delta progradation. The study also emphasizes the importance of recognizing heterogeneity in such mixed siliciclastic‑carbonate environments, and contributes to the understanding of depositional processes and sedimentary architecture in shallow-marine prograding systems.</div></div>","PeriodicalId":21575,"journal":{"name":"Sedimentary Geology","volume":"493 ","pages":"Article 107019"},"PeriodicalIF":2.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145981698","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 best-practices guide to X-ray diffraction studies of sedimentary carbonates","authors":"Georgina Lukoczki ,&nbsp;David L. Bish ,&nbsp;Jay M. Gregg","doi":"10.1016/j.sedgeo.2026.107028","DOIUrl":"10.1016/j.sedgeo.2026.107028","url":null,"abstract":"<div><div>The accurate identification of sedimentary dolomites and related Ca-Mg carbonates is critical for understanding their formation and, by extension, the evolution of Earth's oceans and climate. However, the literature contains numerous examples of misapplication and misinterpretation of X-ray diffraction (XRD) data. For instance, experimental studies claiming successful low-temperature dolomite synthesis have frequently misidentified very high-Mg calcite (VHMC) or other phases as dolomite due to incorrect evaluation of XRD data. Rigorous analytical standards are needed to avoid misinterpretations and to advance the understanding of sedimentary dolomite formation. This paper provides a best-practices guide for powder XRD analysis of trigonal carbonate minerals, with particular emphasis on Rietveld refinement methods for evaluating cation ordering, unit-cell parameters, crystallite size, strain, and stoichiometry. Recommendations are presented for sample preparation, data collection, and analysis, aimed at improving the reliability of carbonate mineral identification and characterization, with particular emphasis on dolomite. Additionally, the nomenclature and classification challenges in distinguishing calcite, high-Mg calcite, VHMC, protodolomite, dolomite, ferroan dolomite, and ankerite are addressed. Finally, the implications of dolomite mineralogy for interpreting past environmental conditions are critically assessed, highlighting the pervasive effects of recrystallization over geological timescales.</div></div>","PeriodicalId":21575,"journal":{"name":"Sedimentary Geology","volume":"493 ","pages":"Article 107028"},"PeriodicalIF":2.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145950267","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":"Migration and timing of an erosional surface of forced regression: A Holocene analogue from the Kanto Plain, Japan","authors":"Susumu Tanabe,&nbsp;Yoshiki Sato","doi":"10.1016/j.sedgeo.2025.107017","DOIUrl":"10.1016/j.sedgeo.2025.107017","url":null,"abstract":"<div><div>Erosional surfaces, including sequence boundaries within coastal sedimentary successions formed in response to sea-level fall, are known to propagate either seaward or landward. Verification of these processes requires millennial-scale reconstruction of entire coastal plains based on radiocarbon ages; however, no such systematic studies have been conducted to date. In this paper, we analyzed six sediment cores and 143 radiocarbon ages from the Nakagawa Lowland in the Kanto Plain, Japan, to reconstruct the migration process and timing of an erosional surface of forced regression (ESFR) formed since the mid-Holocene. In the Nakagawa Lowland, the ESFR is recognized between deltaic marine sediments and the overlying fluvial sediments. The ESFR formed between 6.2 and 1.2 cal kyr BP and truncates the underlying marine sediments in a diachronous manner. Excluding the influence of local topography, the ESFR developed on a tidal flat as a tidal ravinement generated in response to a sea-level fall of approximately 5 m around 4–3 ka. Because marsh-derived peaty silt directly overlies this surface without any time gap, erosion and subsequent deposition are inferred to have occurred nearly simultaneously. Furthermore, the downlapping isochrons of the fluvial sediments onto the ESFR indicate that the formation of the erosional surface did not propagate landward. The peaty silt overlying the surface, which is not eroded by upstream incision, therefore serves as a key marker for identifying the ESFR in the stratigraphic record.</div></div>","PeriodicalId":21575,"journal":{"name":"Sedimentary Geology","volume":"492 ","pages":"Article 107017"},"PeriodicalIF":2.9,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145885204","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":"Effects of particle size distribution and moisture content on the motion and deposit characteristics of debris avalanches","authors":"Ming-wei Ma ,&nbsp;Jia-wen Zhou ,&nbsp;Xing-guo Yang ,&nbsp;Yi-hui Liang ,&nbsp;Tao-Yang ,&nbsp;Hai-mei Liao","doi":"10.1016/j.sedgeo.2025.107018","DOIUrl":"10.1016/j.sedgeo.2025.107018","url":null,"abstract":"<div><div>Debris avalanches characterized by rapid granular flow pose significant hazards, yet the joint influence of particle size distribution, moisture content, and compound topography on their dynamics remains poorly constrained. To address this, we performed multivariable flume experiments simulating the transformation of landslides into granular flows under varying gradations and moisture levels (0–4 %). Our results reveal a robust linear scaling law between deposit runout and width, establishing a stable geometric proportion governing planform spreading. Kinematic analysis demonstrates that moisture content shortens total motion duration primarily by accelerating the deposition stage, whereas mixed gradations exhibit regime-shifting behaviors due to particle segregation. Crucially, we introduce a planform spreading-angle framework that unifies these observations into a single back-calculated coefficient (η). This parameter quantifies lateral spreading capacity, increasing monotonically with particle size while remaining weakly sensitive to moisture for single-size groups. Furthermore, a volumetric-equivalent scale analysis indicates that moisture drives a three-dimensional redistribution of the deposit mass rather than uniform scaling. These findings offer a simplified, physically based approach to predict the runout and spreading of non-cohesive debris avalanches under complex terrain conditions.</div></div>","PeriodicalId":21575,"journal":{"name":"Sedimentary Geology","volume":"492 ","pages":"Article 107018"},"PeriodicalIF":2.9,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145884698","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":"Short eccentricity controls fluvial depositional architecture of upper reaches in the Middle-Late Pennsylvanian paleotropics (~306–308 Ma, Pilsen Basin)","authors":"Richard Lojka ,&nbsp;Jiří Laurin ,&nbsp;Stanislav Opluštil","doi":"10.1016/j.sedgeo.2025.107007","DOIUrl":"10.1016/j.sedgeo.2025.107007","url":null,"abstract":"<div><div>Fluvial deposits often exhibit repetitive changes in depositional architecture, such as the alternation of coarse-grained intervals of highly amalgamated channel deposits and fine-grained intervals of floodplain-dominated strata. These patterns are typically attributed to changes in accommodation related to sea level fluctuations in a downstream fluvial setting, which can affect fluvial deposition hundreds of kilometers inland. However, the control of depositional architecture and repetitive stacking patterns in upstream fluvial systems remains less clear due to the complex interactions between climate, sediment supply, and water discharge. Here, we present a high-precision dated sedimentary record of an ancient fluvial system from a landlocked basin far from the influence of sea level, which was active during the non-glacial phase of the Late Paleozoic Ice Age (LPIA) in the eastern part of the paleotropical region of Pangea. Cyclostratigraphic time series analysis of geophysical borehole data suggests that the alternations observed between braidplain- and floodplain-dominated strata, forming 10–15 m thick sand–mud couplets with nearly basin-wide lateral extent, are most likely related to the “short” cycle of orbital eccentricity (~100 kyr). Larger-scale, 40–70 m thick stacks of these cycles may represent the 405-kyr “long” eccentricity cycle. The observed orbital forcing of the upstream fluvial depositional architecture indicates that climate change played a key role in shaping these systems and their deposits by altering discharge and sediment supply. The results also indicate a persistent seasonal pattern inherent to the tropical climate rather than one caused by glacioeustatic changes. This may suggest limited glacial feedback strength and decoupling of low- and high-latitude climates during the Middle-Late Pennsylvanian phase of LPIA.</div></div>","PeriodicalId":21575,"journal":{"name":"Sedimentary Geology","volume":"492 ","pages":"Article 107007"},"PeriodicalIF":2.9,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145842093","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 digital framework for estuarine stratigraphy: an example of a machine learning approach to paleo-environmental classification and coastal evolution","authors":"N. Simon,&nbsp;R.H. Worden","doi":"10.1016/j.sedgeo.2025.107008","DOIUrl":"10.1016/j.sedgeo.2025.107008","url":null,"abstract":"<div><div>Estuarine successions are globally significant stratigraphic archives, fundamental to understanding coastal evolution, assessing petroleum and groundwater reservoirs, and evaluating carbon storage potential. Yet, their interpretation remains hindered by facies heterogeneity and interpretive subjectivity. This study establishes a new digital framework for estuarine sedimentology by integrating high-resolution core analysis with a machine learning–based sediment classification system (Automated Prediction of Environments using Grain Size: APEGS). Applied to Holocene successions from the River Esk arm of the Ravenglass Estuary (northwest England) and trained on 482 modern reference samples, the workflow objectively discriminates six depositional sub-environments—salt marsh, mud flat, mixed flat, sand flat, tidal bar, and tidal inlet/north foreshore—with reproducibility beyond the reach of lithostratigraphic approaches. The results resolve vertical and lateral facies variability at unprecedented precision, capturing transgressive and highstand infilling phases and revealing tide-dominated early Holocene conditions when the current inner estuary was directly connected to the sea. The method establishes a transferable analytical protocol with international applicability across marginal-marine successions, offering a step-change in the quantitative reconstruction of coastal evolution. By replacing subjectivity in facies classification with a reproducible, scalable, and globally transferable digital toolset, this research sets a new benchmark for the stratigraphic interpretation of estuaries. Its methodological innovation directly informs depositional modelling, resource evaluation, and climate adaptation strategies.</div></div>","PeriodicalId":21575,"journal":{"name":"Sedimentary Geology","volume":"492 ","pages":"Article 107008"},"PeriodicalIF":2.9,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145760834","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":"Soft-sediment deformation structures in eolian sandstones: Morphology, genesis, and stratigraphical relationships through time","authors":"Gabriel Schäffer Sipp ,&nbsp;Claiton Marlon Dos Santos Scherer ,&nbsp;Amanda Goulart Rodrigues ,&nbsp;Ezequiel Galvão De Souza ,&nbsp;Rossano Dalla Lana Michel ,&nbsp;Monica Oliveira Manna ,&nbsp;César Alejandro Goso Aguilar ,&nbsp;Fábio Herbert Jones","doi":"10.1016/j.sedgeo.2025.106996","DOIUrl":"10.1016/j.sedgeo.2025.106996","url":null,"abstract":"<div><div>Soft-sediment deformation structures (SSDS) are widespread in the eolian sedimentary record, with examples commonly associated with other depositional systems. In such contexts, deformation is typically enhanced by sealing horizons related to interdunes or sabkha deposits. The Late Permian Buena Vista Formation of the Paraná Basin contains extensive intervals with SSDS, but these are restricted to eolian dune deposits lacking dry or wet interdune facies or sealing horizons. The deformed horizons record multiple events, with superimposed structures that allow the reconstruction of deformation episodes at the outcrop scale. These distinctive features make the Buena Vista Formation an exceptional case for understanding SSDS in eolian environments and for evaluating the role of driving forces behind their formation. The active SSDS described in this study include sand diapirs, interpenetrative cusps, sand blows, complex recumbent folds, intra-set convolute folds, massive beds, and pockets. Passively generated structures comprise overturned beds, contorted strata, and intra-set syn-deformational faults. Seismic activity is inferred as the primary trigger for deformation, based on several lines of evidence: (i) similarities with other seismically induced structures, (ii) large areal distribution with zonation in structural complexity, (iii) wide lateral continuity along individual outcrops, (iv) stratigraphic recurrence, and (v) the active geotectonic setting during deposition of the unit. This tectonic activity coincides with the accretion of the Patagonia Terrane to southwestern Gondwana. Under these conditions, rapid water-table rise likely generated overpressure, facilitated by air entrapment in the eolian sediments, ultimately enabling widespread soft-sediment deformation.</div></div>","PeriodicalId":21575,"journal":{"name":"Sedimentary Geology","volume":"491 ","pages":"Article 106996"},"PeriodicalIF":2.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145493193","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":"First record of paleowind-driven wave and storm activities and their controls on reservoir quality of Shahejie Formation, Liaodong Bay Depression, Bohai Bay Basin, China","authors":"Zhikang Wang ,&nbsp;Yuanfu Zhang ,&nbsp;Jianping Guo ,&nbsp;Yuxiu Li ,&nbsp;Xiaobo Huang ,&nbsp;Wei Xu ,&nbsp;Junyang Li ,&nbsp;Xiaodong Yuan ,&nbsp;Kai Ma","doi":"10.1016/j.sedgeo.2025.107006","DOIUrl":"10.1016/j.sedgeo.2025.107006","url":null,"abstract":"<div><div>Lacustrine depositional models for wind-driven basins often inadequately represent the significant role of wave and storm processes, despite their recognition in modern analogs. This study utilizes the early Oligocene (E₂s₂) succession of the Liaodong Bay Depression (Bohai Bay Basin, China) as a critical ancient case study to address this gap. Through meticulous core analysis revealing 14 lithofacies and 5 lithofacies associations, we further conclusively identified storm events by correlating with the Paleogene ideal storm sequence in the Bohai Bay Basin. Integrating these data with logging and seismic interpretations, we propose a new depositional model: a wave-dominated clastic littoral system in the west and a fluvial-dominated braided-delta system in the east. Based on the NE-SW trend of beach bars concentrated in the northwestern study area, we infer a prevailing southeasterly wind direction—consistent with the Pacific summer monsoon that transported abundant moist air to the Liaodong Bay Basin, fostering a humid climate. This interpretation is further corroborated by palynological and oxygen isotope evidence. Furthermore, wave-reworked reservoirs are characterized by low matrix and unstable lithic fragment contents, well-sorted and highly rounded grains, and a high proportion of rigid grains. These attributes impart strong resistance to compaction and enhance dissolution, leading to superior reservoir quality. This study underscores that wave-reworked deposits should be prioritized as exploration targets in wind-driven lakes. The depositional model and reservoir formation mechanism established herein hold broad applicability for oil and gas exploration and development in other wind-driven continental lacustrine systems.</div></div>","PeriodicalId":21575,"journal":{"name":"Sedimentary Geology","volume":"491 ","pages":"Article 107006"},"PeriodicalIF":2.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145681149","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}