Basin Research最新文献

{"title":"Post-Salt Evolution of the Offshore Essaouira Basin (Morocco)","authors":"Hala Chebli,&nbsp;Michael. R. Hudec,&nbsp;Asmae Benarchid,&nbsp;Frank Peel,&nbsp;Apps Gillian,&nbsp;Said Chakiri","doi":"10.1111/bre.70094","DOIUrl":"10.1111/bre.70094","url":null,"abstract":"<div>\u0000 \u0000 <p>Salt-bearing passive margins represent some of the most structurally complex and economically significant hydrocarbon provinces worldwide. However, these margins are often characterised by substantial uncertainties related to crustal and syn-rift basin architecture and suprasalt tectonic evolution. The Essaouira Basin, a salt-bearing passive margin and a promising hydrocarbon province encompassing all essential elements of a petroleum system, remains geologically complex, with unresolved questions regarding its post-salt gravity-driven deformation and overall tectonic evolution. This study presents an integrated analysis of the post-salt evolution of the Essaouira Basin, utilising 2D and 3D seismic reflection and well data combined with structural restoration. Our results indicate that salt deposition was strongly controlled by basement structural inheritance, evidenced by abrupt lateral variations in salt thickness across the basin. The evolution of the basin proceeded through three distinct phases: (1) An initial phase dominated by gravity-driven deformation, strongly influenced by the Cap Ghir Graben, which functioned as a localised depocenter and disrupted downdip salt flow, resulting in the development of two linked kinematic systems. This early configuration led to a distribution of structures and domains that differs from conventional salt-bearing passive margins; (2) A second phase characterised by halokinesis, primarily manifested through passive diapirism, driven by differential sedimentary loading during the Early Cretaceous; and (3) A final phase, commencing in the Late Cretaceous, marked by contractional deformation related to far-field compressional stresses associated with the Atlas orogeny. Additionally, Late Cenozoic shelf uplift is attributed to plume-related mantle upwelling. This study highlights the role of pre-existing rift architecture and subsequent tectonic events in shaping the Essaouira Basin's complex salt tectonics, providing new insights into the evolution of salt-bearing passive margins.</p>\u0000 </div>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"38 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147447891","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":"Slumping and Sediment Storage at the Shelf-Edge: A Case Study From the Kookfontein and Waterford Formations, Tanqua Karoo Depocenter, South Africa","authors":"Ellen Reat Wersan,&nbsp;Cari Johnson,&nbsp;Emma A. Morris,&nbsp;H. DeVille Wickens","doi":"10.1111/bre.70083","DOIUrl":"10.1111/bre.70083","url":null,"abstract":"<p>A low-gradient shelf-edge delta system preserved at the Katjiesberg outcrop in the northern Tanqua Karoo depocenter (South Africa) records the evolution from shelf- to slope-depositional processes in a fine-grained sandstone dominated system. Lateral and vertical facies associated with slumping and other soft-sediment deformation features at near seismic scale (~1 km laterally, ~100 m vertically) are documented. Stratigraphic correlations of these units using measured sections and ~3 km of digital outcrop models document the stratigraphic position of two shelf-edge inflection points, which implies progradation of the shelf-edge. Progradation and aggradation of detached slump deposits and their transition into dominantly in situ deformation features are consistently representative of the evolution from slope-to-shelf through time. The exposed Permian–Triassic Kookfontein Formation prodelta/slope succession at Katjiesberg is likely a time-correlative deposit to clinothem cycles previously described 10s of km up depositional-dip to the southwest. Katjiesberg represents the more distal expression of these cyclothems in the lower Kookfontein Formation, whereas the upper cycles are interpreted as collapse-dominated clinothems that are overlain by basinward prograding mouthbar deposits of the Waterford Formation. This study highlights intra-basinal process regime variability and facies expressions within a preserved shelf-edge delta system. Results underscore the role of slump features in characterising clinothems and signalling clinothem rollover, which is particularly useful in low-gradient systems with subtle clinothem geometry. The characterisation of low-gradient clinothem geometries and variability in this shelf-edge delta system improves our understanding of shelf-margin accretion and deepwater sediment delivery across the shelf and slope.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"38 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/bre.70083","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147384028","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":"Non-Isochronous Transgression in Dual-Provenance Sedimentary Basins: Insights From Experimental Studies and Geometric Analysis","authors":"Wei Zhang,&nbsp;Junhui Wang,&nbsp;Zhuang Li,&nbsp;Gesi Tao,&nbsp;Li Li,&nbsp;Ranran Xia","doi":"10.1111/bre.70092","DOIUrl":"10.1111/bre.70092","url":null,"abstract":"&lt;div&gt;\u0000 \u0000 &lt;p&gt;In conventional sequence stratigraphy, it is commonly believed that transgression occurs simultaneously across the sedimentary basin experiencing relative sea-level (RSL) rise. As a consequence, the maximum flooding surface is widely utilised as a quasi-isochronous chronostratigraphic marker for regional stratigraphic correlation. The concept of shoreline autoretreat demonstrates that the transgression may occur after a precursory regression. How long the precursory regression would last depends on external forcings including the rate of sediment supply (&lt;i&gt;q&lt;/i&gt;&lt;sub&gt;s&lt;/sub&gt;) and rate of RSL rise (&lt;i&gt;R&lt;/i&gt;&lt;sub&gt;rsl&lt;/sub&gt;) and slope features of the basin. This means within a given basin, the onset of transgression varies in locations with different sediment supply rates and/or slope features. This study aims to analyse the influencing factors of the occurrence time of transgression in dual-provenance basins through theoretical modelling and two-dimensional flume experiments. To investigate these factors, two series of tank experiments were designed. The first series is supply-modulated where the two provenances were different in &lt;i&gt;q&lt;/i&gt;&lt;sub&gt;s&lt;/sub&gt;, while the basin slope condition were kept the same. The second series is modulaed where the two provenances varied in hinterland slopes (&lt;i&gt;γ&lt;/i&gt;) while &lt;i&gt;q&lt;/i&gt;&lt;sub&gt;s&lt;/sub&gt; were kept the same. Each series included 2 or 3 runs with different multiples of &lt;i&gt;R&lt;/i&gt;&lt;sub&gt;rsl&lt;/sub&gt; or &lt;i&gt;q&lt;/i&gt;&lt;sub&gt;s&lt;/sub&gt;. Furthermore, a reference run was performed where the two provenances were identical in both &lt;i&gt;q&lt;/i&gt;&lt;sub&gt;s&lt;/sub&gt; and &lt;i&gt;γ&lt;/i&gt;. The results reveal that: (1) &lt;i&gt;q&lt;/i&gt;&lt;sub&gt;s&lt;/sub&gt; and &lt;i&gt;R&lt;/i&gt;&lt;sub&gt;rsl&lt;/sub&gt; have similar effect on transgression. As &lt;i&gt;q&lt;/i&gt;&lt;sub&gt;s&lt;/sub&gt; increases, the timing of transgression is delayed, while an increase in &lt;i&gt;R&lt;/i&gt;&lt;sub&gt;rsl&lt;/sub&gt; accelerates its occurrence. Both factors affect the timing of transgression by altering the size of the river-delta system. (2) The occurrence of transgression is closely related to the size of the river-delta system. Guided by the autoretreat mechanism, the fluvial-deltaic system maintains its progradational trend during a constant RSL rise, provided it has not yet reached its critical dimensions. A transgressive retreat is fundamentally postponed until the delta evolves to exceed this intrinsic spatial threshold, at which point the required sediment volume for progradation outstrips the supply. Only when the river-delta size exceeds the critical size does transgression take place. The critical size is controlled by a combination of &lt;i&gt;q&lt;/i&gt;&lt;sub&gt;s&lt;/sub&gt;, &lt;i&gt;R&lt;/i&gt;&lt;sub&gt;rsl&lt;/sub&gt;, and basin slope. (3) Hinterland slope (&lt;i&gt;γ&lt;/i&gt;) affects subaerial and subaqueous allocations of sediment. Larger &lt;i&gt;γ&lt;/i&gt; result in a reduction of subaerial allocations of sediment. As a result, the alluvial realm expands slower but the aggradation rate is higher, by which transgression is delayed. The Canterbury Plain in New Zealand serves as a po","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"38 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147320152","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":"Erosional Modulation of Tectonically-Controlled Shelf-Edge Migration: Insights From Middle Miocene Clinoform Successions, Ulleung Basin, East Sea (Japan Sea), Korea","authors":"Eunhyun Cho,&nbsp;Hoon-Young Song,&nbsp;Jusun Woo","doi":"10.1111/bre.70090","DOIUrl":"10.1111/bre.70090","url":null,"abstract":"<div>\u0000 \u0000 <p>Shelf-edge evolution in tectonically active basins reflects complex interactions between structural deformation, sea-level change and sedimentary processes. This study investigates Middle Miocene clinoform successions (14.00–12.50 Ma) in the southwestern Ulleung Basin, East Sea, using 3D seismic data to examine how erosional processes modulate structurally-controlled shelf-edge migration patterns. Eight clinothems were identified, showing cyclic alternations between sigmoidal types (ascending trajectories) and thin-top sigmoidal/oblique types (flat-to-descending trajectories), possibly reflecting high-frequency relative sea-level cycles (4th–5th order). A reverse fault system in the southeast of the study area (DS A) formed monocline structure that created differential accommodation along the shelf margin. The structure caused reduced accommodation space favouring oblique clinothems in the uplifted proximal area and maintained more space resulting in thin-top sigmoidal clinothems distally. Conventional tectono-stratigraphic models often predict that such uplift enhances shelf-edge progradation, producing arcuate shelf-edge geometry in map view. However, shelf-edge migration remained relatively linear without enhanced shelf-edge migration toward the reverse fault system, contradicting these established models. The interaction between the structural deformation and erosional processes on the shelf margins explains these shelf-edge behaviours. The structural deformation (DS A) that controlled clinoform type variation also induced slope oversteepening that promoted erosional features at shelf margins within 20 km of this structure. These erosional depressions formed atop sigmoidal clinothems during early stage of sea-level fall, creating additional accommodation at the shelf margin that moderated shelf-edge advance. This ‘erosional modulation’ process represents a compensatory mechanism where uplift-induced oversteepening creates preferential erosion sites that generate offsetting accommodation, preventing the expected translation of structural deformation into margin architecture. The recurrence of this process across multiple stratigraphic cycles suggests that erosional modulation operates as a persistent architectural control rather than independent random events. These findings provide new insights into how erosional processes can modulate shelf-edge evolution, particularly in tectonically active settings, complementing traditional models that assume direct translation of structural deformation into margin architecture.</p>\u0000 </div>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"38 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146222897","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":"Miocene Siliciclastic-Rich Sabkha Type Deposits of the St. Paul Area: A Regional Reference Model for Sedimentation and Sequence Stratigraphic interpretation in the Gulf of Suez, Egypt","authors":"Mounir H. El-Azabi","doi":"10.1111/bre.70091","DOIUrl":"10.1111/bre.70091","url":null,"abstract":"<div>\u0000 \u0000 <p>Extensive deposition of thick marine evaporites occurred during the middle and late Miocene in the Gulf of Suez rift basin, yet their origin remains controversial, particularly regarding marine connectivity, brine sources, and climatic controls. In the St. Paul area, at the western rift margin, stacked, shallowing-upward cycles of shale, mudstone, and evaporite grade landward into conglomerate and sandstone of proximal fan facies. A detailed sedimentological and sequence stratigraphic study offers new insights into the evolution of these Langhian–Serravallian marginal marine evaporites and their basinal equivalents, clarifying the timing of restriction events and proposing viable models for their accumulation. The evaporites, mainly epigenetic anhydrite, occur as nodular forms with chicken-wire and enterolithic textures, indicative of deposition in saline mudflats under a hot, arid climate. This marine-fed, siliciclastic-rich sabkha flat lacks a modern analog due to its uncommon mud matrix. Periodic continental flooding disrupted the sabkha mudflat, leading to the deposition of laminated and fanned gypsum in ephemeral saline pans. The stratal architecture of the evaporites and associated sediments reveals three depositional sequences, each with a lower retrograding deep subtidal shale and basal channelled sandstone, and an upper prograding shallow subtidal to intertidal siliciclastic mud and supratidal evaporites. Sabkha and salina evaporites mark the late highstand facies, while lowstand evaporites formed in the basin centre when it became isolated and hypersaline due to evaporative drawdown. Three major marine flooding events from the Mediterranean had occurred during the Langhian–Serravallian, prior to complete basin isolation from the north. Each event culminated in extensive evaporite accumulation as the basin became temporarily isolated. Rift-related tectonics, global cooling, glacio-eustasy, and changes in basin connectivity were key drivers of temporary restrictions, while arid climate controlled brine concentration. These findings resolve some long-standing debates on the origin of the Gulf of Suez evaporites and their connection to the northern Mediterranean source during the Miocene.</p>\u0000 </div>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"38 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146184376","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":"Deconvolving the Effects of Fluvial Transit and Storage on Preservation of Sedimentary Source Signals Using Heavy Minerals and Terrestrial Biomarkers","authors":"Sophia Dosch,&nbsp;Niels Hovius,&nbsp;Sergio Andò,&nbsp;Eduardo Garzanti,&nbsp;Marisa Repasch,&nbsp;Joel Scheingross,&nbsp;Dirk Sachse","doi":"10.1111/bre.70086","DOIUrl":"10.1111/bre.70086","url":null,"abstract":"<p>Analysis of naturally occurring markers of environmental signals, or proxy analysis, in sedimentary records can yield valuable insights into the geologic past. However, these proxies may be altered between sediment source and sink by selective gain, loss, or transformation of individual organic or inorganic components. To aid interpretation of sedimentary proxies, we must understand physical and chemical processes occurring during transit. We track the provenance and transformation of two commonly used proxies, long-chain <i>n</i>-alkanes and heavy minerals, between source and sink along the Río Bermejo, a lowland alluvial river without significant tributaries or distributaries, traversing the east Andean foreland basin. Our sampling strategy allowed determining the sediment input signal and isolating the effects of long-range transport and transient floodplain storage. Fine-grained sediments present in the suspended load and deposited in floodplains show heavy <i>n</i>C₂₉ <i>n-</i>alkane δ²H values compared to channel bed sediment. Heavy <i>n</i>C₂₉ <i>n-</i>alkane δ²H values indicate that organic matter in suspended and deposited sediments was sourced from low elevations, while light <i>n</i>C₂₉ <i>n-</i>alkane δ²H values indicate upland sources for the bed sediment. These data suggest that organic matter proxies in finer sediment are overprinted during transient floodplain storage, while organic matter travelling near the river bed is transferred downstream efficiently without significant recycling. Meanwhile, a negative correlation of Zircon-Tourmaline-Rutile index and corroded grains of all samples indicates progressive weathering of silicate minerals during transient foreland sediment storage. In particular, sediment deposited on the floodplain is depleted in clinopyroxenes and amphiboles compared to suspended sediment. Combining the physical and chemical characteristics of organic and inorganic proxies can help isolate source area fingerprints and identify the effects of lowland fluvial transit on sedimentary records. This improves our understanding of how source-to-sink processes influence the preservation of proxy signals, their transfer into the stratigraphic record, and the potential impacts of flood basin sediment storage on biogeochemical cycles.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"38 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/bre.70086","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135005","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":"Upper Cretaceous Seismic Stratigraphy and Magma-Enhanced Petroleum System of the Offshore Indus Basin","authors":"Yasir Shahzad,&nbsp;Ines Pereira,&nbsp;Ricardo Pereira,&nbsp;Rui Pena dos Reis","doi":"10.1111/bre.70089","DOIUrl":"10.1111/bre.70089","url":null,"abstract":"<p>The Cretaceous petroleum system beneath the volcanic rocks in the deep offshore Indus Basin presents a challenging yet potentially significant frontier for hydrocarbon exploration. This study utilises new 2D seismic reflection data to explore the stratigraphy and structural complexities within the basin, which is predominantly influenced by extensive magmatic activity. Key findings highlight the presence of significant stratigraphic discontinuities and potential hydrocarbon reservoirs below a regionally extensive basalt unit. Through detailed seismic stratigraphy and sequence analysis, integrating data from boreholes and seismic data, this study delineates five seismic facies units grouped into Lower and Upper Cretaceous megasequences, identifies features such as saucer-shaped sill complexes and hydrothermal vent complexes, and assesses the post-Cretaceous depositional environments. The complex interplay between tectonics, sedimentary and magmatic processes has been mapped, providing insights into the potential hydrocarbon system. Upper Cretaceous sequences show lateral variations with a northeast to southwest fining trend and differential thickness across the volcanic units, thinning northward and thickening southeastward towards the Saurashtra High. Lower Cretaceous sequences reveal lithologic composition and thickness variability, with the Sembar and Goru formations locally exceeding 2000 m in thickness on the shelf before thinning basinwards. Quantitative thermal modelling indicates that magmatic intrusions impacted source rock maturation, raising sediment temperatures by 50°C–100°C and affecting approximately 15%–20% of the Cretaceous Sembar Formation source rock, thereby potentially generating an additional 10%–15% hydrocarbons beyond burial maturation alone. Our quantification shows magmatic heating accelerated Sembar Formation maturation by 8%–18%, facilitating hydrocarbon generation in this sub-basalt system. The timing of this magmatism (~70–60 Ma, just before and during Deccan volcanism) was favourable, coinciding with organic-rich shales entering the peak oil window and favouring hydrocarbon generation and migration. These findings provide insights into the geological history and hydrocarbon potential of the offshore Indus Basin's Cretaceous units and offer analogues for other volcanic passive margins worldwide.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"38 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/bre.70089","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146071840","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":"Sedimentary and Sequence Responses to Tectonic and Climatic Changes in a Continental Depression Basin","authors":"Zhichao Yu,&nbsp;Detian Yan,&nbsp;Caspar Daniel Adenutsi","doi":"10.1111/bre.70088","DOIUrl":"10.1111/bre.70088","url":null,"abstract":"<div>\u0000 \u0000 <p>Sequence stratigraphy has long provided a framework for deciphering how environmental conditions are recorded in sedimentary basins across a range of tectonic settings. Much of our current understanding of sequence architecture in depression basins, however, comes from studies that focus on individual external forcings such as sediment supply, climate, or lake-level change. The relative importance of these forcings in shaping key characteristics of stratigraphic patterns remains poorly quantified. Moreover, distinguishing external signals from autogenic variability is particularly challenging at mid-term (10⁵–10⁶ yr) timescales. To address these issues, we conducted nine numerical simulations of continental-scale sediment-routing systems, spanning millions of years, to examine how basin sedimentation and sequence stratigraphy respond to variations in lake level, precipitation and tectonic uplift within the source region of a depression basin. Our results show that different external forcings dominate distinct aspects of stratigraphic development: (1) precipitation strongly governs depositional and erosional rates, whereas uplift exerts only a minor influence; (2) uplift determines the overall extent of the basin margin, while autogenic processes introduce local spatial variability in its position; and (3) lake-level cyclicity controls stratal stacking patterns. A reduction in amplitude results in an earlier development of the initial flooding surface, which in turn extends the duration of transgression and increases the regressive ratio. Across all simulations, enhanced precipitation produces short, thick stratigraphic packages, whereas tectonic uplift generates more elongated, thin successions. These findings highlight the distinct signatures of different external forcings in shaping stratigraphic development and provide a basis for interpreting environmental signals preserved in continental depression basins, particularly over mid-term timescales.</p>\u0000 </div>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"38 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145968369","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 Neoproterozoic Throssell Range Group, Western Australia: A Peri-Marginal Continental Basin in Rodinia and Its Implications for the Centralian Superbasin","authors":"Ross B. Campbell,&nbsp;Peir K. Pufahl,&nbsp;Penelope Sinclair,&nbsp;Erin L. Martin,&nbsp;Lillian H. Cybulski,&nbsp;Urmidola Raye,&nbsp;Paul Polito,&nbsp;Rebecca Church,&nbsp;Marina Joury,&nbsp;Daniel Layton-Matthews","doi":"10.1111/bre.70087","DOIUrl":"10.1111/bre.70087","url":null,"abstract":"<p>This paper presents a new interpretation of an early Neoproterozoic cratonic basin. Its depositional history is a record of fault reactivation and differential subsidence in a heterogeneous basement during Rodinia's breakup. Globally, the reactivation of deep structures in older Proterozoic lithosphere surrounding the Archaean cratonic cores probably controlled the development of Neoproterozoic cratonic basins. These structures may also have provided conduits for mineralizing fluids. The Throssell Range Group (TRG) is a 1–3.5 km thick siliciclastic succession, topped by a carbonate platform, in the Paterson Orogen of north-western Australia. It hosts the <i>c</i>.2 Mt. Nifty Cu deposit. It is among several successions attributed to the large continental Centralian Superbasin, thought to have its origin in crustal sagging at <i>c</i>.840 Ma. However, the TRG includes deep water strata unusual for continental sag basins, and the ages of intrusions suggest that it is older than 840 Ma. Based on detailed logging of recent drillcore, two sedimentary sequences separated by a disconformity are recognised. This differs from previous work which interprets the TRG as a single conformable succession. Sequence 1 consists of three lithofacies associations, interpreted as the record of deposition in half-graben sub-basins, bounded by basement faults reactivated by extensional stresses related to Rodinia's breakup. Sequence 2 comprises four lithofacies associations, interpreted as recording a period of reduced clastic sediment supply in a peri-marginal continental basin exposed to wind-driven upwelling of nutrient-rich oceanic water. The subsidence of thin, more juvenile Proterozoic lithosphere produced a flooded margin between the Pilbara and North Australian Cratons. As sea level rise slowed, a carbonate platform prograded over the basin. More generally, this suggests that the Centralian Superbasin, and other Neoproterozoic cratonic basins, may best be thought of as mosaics of roughly coeval sub-basins, each with a specific history determined by local basement reactivation.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"38 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/bre.70087","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145962381","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":"The Temporal and Geometrical Evolution of a Middle Carboniferous Extensional Basin in the Eastern Campine Basin (NE Belgium)","authors":"Jef Deckers,&nbsp;Bernd Rombaut,&nbsp;Bailey Lathrop,&nbsp;Francesco Vinci,&nbsp;Luc Hance","doi":"10.1111/bre.70077","DOIUrl":"10.1111/bre.70077","url":null,"abstract":"<div>\u0000 \u0000 <p>Major thickness changes of the Namurian interval (Serpukovian and early Bashkirian) recorded in wells across several basins in northwestern Europe provide indications for rifting, but little is known about the dynamics of this extensional phase. On the basis of new biostratigraphic analyses, well-log correlations, seismic interpretations, and geological models for the Campine Basin (northeastern Belgium), this study is the first to provide detailed constraints on the timing and geometry of this middle Carboniferous tectonic phase. The karstification of the lower Carboniferous carbonates, which is key for geothermal and gas storage applications in the region, was strongly influenced by the middle Carboniferous tectonics, highlighting the importance of a thorough understanding. During the early to late Visean, the Campine Basin was characterised by carbonate platform development under relative tectonic quiescence. The latest Visean was a time of major shifts in tectonics throughout Western Europe and marked the start of differential subsidence of the eastern Campine Basin. In this part of the basin, a several hundred meters thick sediment succession was deposited, with a progressive increase in siliciclastics at the expense of carbonates. In the western Campine Basin, in contrast, the latest Visean and earliest Namurian represented a major depositional hiatus. As differential subsidence continued from the Visean into the Namurian up to the earliest Westphalian A (late Bashkirian), the contemporaneous depositional sequences, mainly delta-systems, were consistently developed thicker in the eastern Campine Basin compared to the western Campine Basin. The regional thickness model of the Namurian, on the basis mainly of seismic data, indicates that the differentiation between the western and eastern Campine Basin took place along a narrow basin margin comprised of tilted blocks and faults with normal vertical throws having predominantly NNE–SSW orientations. This fault direction could have resulted from an ESE–WNW extensional direction that likely originated from N-S maximum horizontal compression by the northwards migrating Variscan thrust front further south. The extensional phase ended in early Westphalian A and marked the start of a thermal subsidence phase that likely continued up to the late Westphalian B when compressional foreland dynamics gradually started dominating the region. This transition from extension to thermal subsidence coincided roughly with a regional change in sedimentary deposition from delta progradation towards lower delta plain deposition.</p>\u0000 </div>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"38 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145938107","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}