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An exploratory study of “large-n” detrital zircon geochronology of the Book Cliffs, UT via rapid (3 s/analysis) U–Pb dating 通过快速(3 秒/分析)U-Pb 定年对犹他州书崖的 "大 n "碎屑锆石地质年代进行探索性研究
IF 3.2 2区 地球科学
Basin Research Pub Date : 2024-01-09 DOI: 10.1111/bre.12840
Kurt E. Sundell, George E. Gehrels, Michael D. Blum, Joel E. Saylor, Mark E. Pecha, Bridget P. Hundley
{"title":"An exploratory study of “large-n” detrital zircon geochronology of the Book Cliffs, UT via rapid (3 s/analysis) U–Pb dating","authors":"Kurt E. Sundell,&nbsp;George E. Gehrels,&nbsp;Michael D. Blum,&nbsp;Joel E. Saylor,&nbsp;Mark E. Pecha,&nbsp;Bridget P. Hundley","doi":"10.1111/bre.12840","DOIUrl":"https://doi.org/10.1111/bre.12840","url":null,"abstract":"<p>Detrital zircon (DZ) U–Pb geochronology has improved the way geologists approach questions of sediment provenance and stratigraphic age. However, there is debate about what constitutes an appropriate sample size (i.e., the number of dates in a DZ sample, <i>n</i>), which depends on project objectives, sample complexity, and, critically, analytical budget. Additionally, there is ongoing concern about bias introduced by zircon grain size. We tested a recently developed rapid (3 s/analysis) data acquisition method by multicollector laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) that incorporates an automated selection routine and calculates two-dimensional grain geometry from polished sample surfaces. Eleven samples were analysed from below and above the Late Cretaceous (Campanian) basal Castlegate unconformity of the Book Cliffs, Utah, in a down-depositional-dip transect including Price, Horse, Tusher, and Thompson canyons. 12,448 new concordant dates were generated during two measurement sessions. Results are consistent with recent studies suggesting there is no major provenance change and little time (1–2 Myr) represented across the unconformity. Grain size and sample size both exert a strong control on sample dissimilarity. Age distributions constructed from subsamples of large grains are systematically less similar to whole samples; age distributions composed of small grains are overall more similar to whole samples. As such, North American sediment sources that produce large grains such as the Grenville and Yavapi-Mazatzal belts can bias age distributions if only large grains are analysed. A sample size of <i>n</i> = 100 is inadequate for characterizing age distributions as complex as those of the Book Cliffs, whereas a sample size of <i>n</i> = 300 provides good characterization. Sample size of <i>n</i> ≈ 1000 or more is unnecessary unless project objectives include scanning for subordinate age groups, such as when identifying the youngest grains for calculating a maximum depositional age (MDA). Dates used in MDA calculations acquired with rapid acquisition are best re-analysed with longer LA-ICP-MS acquisition methods or isotope dilution thermal ionization mass spectrometry for increased accuracy and precision. We include new MATLAB code and open-source software programs, <i>DZpick</i> and <i>DZmda</i>, for automated spot picking and calculating MDAs.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"36 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139406954","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}
引用次数: 0
Submarine fluid flow system feeding methane emission in the northern South China Sea 南海北部甲烷排放的海底流体流动系统
IF 3.2 2区 地球科学
Basin Research Pub Date : 2024-01-08 DOI: 10.1111/bre.12839
Jiliang Wang, Ang Li, Lawrence Hongliang Wang, Shiguo Wu, Qingping Li
{"title":"Submarine fluid flow system feeding methane emission in the northern South China Sea","authors":"Jiliang Wang,&nbsp;Ang Li,&nbsp;Lawrence Hongliang Wang,&nbsp;Shiguo Wu,&nbsp;Qingping Li","doi":"10.1111/bre.12839","DOIUrl":"https://doi.org/10.1111/bre.12839","url":null,"abstract":"<p>Submarine fluid flow system can transport methane into ocean. However, its evolution is not fully understood, particularly methane migration through the gas hydrate stability zone (GHSZ) in deep-water settings. Here, we used 3D seismic and well-logging data to show the currently active fluid flow system in the northern South China Sea. It was interpreted to have two parts and they together feed intermittent methane emission. Three gas clouds have been seismically imaged beneath the base of gas hydrate stability zone (BGHSZ) and a set of new faults can be identified within them. Twenty-eight seismic pipes were found to penetrate three vertically stacked mass transport deposits (MTDs) above the gas clouds. Log-seismic correlation shows that the seismic reflections in the pipe represent MTD sediment, bulk carbonate and gas hydrate- or free gas-bearing sediments. We interpreted faults and pipes as the main migration conduits below and above the BGHSZ respectively. The MTD within the GHSZ could seal the underlying free gas transported by faults and thus overpressure built up at the base prior to the occurrences of the pipes and the fracturing through the overlying sedimentary succession. Subsequently, focused fluid flow entered the GHSZ, with the methane probably bypassing the GHSZ before pore clogging of gas hydrates occurred. Additionally, mapping of high-amplitude reflections surrounding the upper portion of gas clouds reveals the relict free gas associated with three paleo-GHSZ bases. Episodic emplacements of new MTDs repeatedly caused the upward shifts of the BGHSZ and the resultant gas hydrate dissociation, contributing to methane emission. We proposed that the occurrences of MTDs may facilitate methane emission by intermittently trapping methane and inducing gas hydrate dissociation in deep-water settings.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"36 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139400014","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}
引用次数: 0
Joint inversion of temperature, vitrinite reflectance and fission tracks in apatite with examples from the eastern North Sea area—Response to discussion II 以北海东部地区为例,联合反演磷灰石中的温度、玻璃光泽反射率和裂变轨迹--对讨论二的回应
IF 3.2 2区 地球科学
Basin Research Pub Date : 2023-12-20 DOI: 10.1111/bre.12838
Søren B. Nielsen, Niels Balling
{"title":"Joint inversion of temperature, vitrinite reflectance and fission tracks in apatite with examples from the eastern North Sea area—Response to discussion II","authors":"Søren B. Nielsen,&nbsp;Niels Balling","doi":"10.1111/bre.12838","DOIUrl":"10.1111/bre.12838","url":null,"abstract":"","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"36 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138953979","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}
引用次数: 0
Joint inversion of temperature, vitrinite reflectance and fission tracks in apatite with examples from the eastern North Sea area—Further discussion 以北海东部地区为例,对磷灰石中的温度、玻璃光泽反射率和裂变轨迹进行联合反演--进一步讨论
IF 3.2 2区 地球科学
Basin Research Pub Date : 2023-12-20 DOI: 10.1111/bre.12837
Peter Japsen, Paul F. Green
{"title":"Joint inversion of temperature, vitrinite reflectance and fission tracks in apatite with examples from the eastern North Sea area—Further discussion","authors":"Peter Japsen,&nbsp;Paul F. Green","doi":"10.1111/bre.12837","DOIUrl":"10.1111/bre.12837","url":null,"abstract":"","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"36 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139168438","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}
引用次数: 0
Sedimentology and sequence stratigraphy of shallow and deeper marine Miocene deposits: A case study from the St. Paul and Gebel El-Zeit blocks, Gulf of Suez, Egypt 中新世浅层和深层海相沉积学和层序地层学:以埃及苏伊斯湾圣保罗和Gebel El-Zeit区块为例
IF 3.2 2区 地球科学
Basin Research Pub Date : 2023-12-07 DOI: 10.1111/bre.12836
Mounir H. El-Azabi
{"title":"Sedimentology and sequence stratigraphy of shallow and deeper marine Miocene deposits: A case study from the St. Paul and Gebel El-Zeit blocks, Gulf of Suez, Egypt","authors":"Mounir H. El-Azabi","doi":"10.1111/bre.12836","DOIUrl":"10.1111/bre.12836","url":null,"abstract":"<p>Marginal and deeper marine facies typify the Miocene exposures along the western margin of the Gulf of Suez rift basin. The stratigraphic setting of these facies is a subject of debate and confusing at best. Integrative sedimentological and sequence stratigraphic study of successions exposed in the St. Paul and El-Zeit blocks provides insight into the lateral relationships between the two facies and their evolution, a topic that is not fully understood. The St. Paul block, located at the basin margin, has thin shallow marine facies, while the succession of El-Zeit block, situated near the basin axis, consists of basal conglomerates, thin shallow marine carbonates, thick deeper marine shale and marginal evaporites. The facies architecture of these successions is interpreted as belonging to two different depositional models: a fan-delta/lagoon system followed upwards by an alluvial fans/sabkha-tidal flat system in the St. Paul hangingwall basin, and carbonate–siliciclastic–evaporite systems on the hangingwall dip-slope ramp of El-Zeit block. These models may help understanding the sedimentary history of other similar blocks in the rift basin. The studied facies show many striking features such as deposition during tilting of fault block, abrupt facies and thickness variations, coarse clastic shedding, erosion channel filling, onlapping of high standing blocks and evaporite accumulation. These features are the result of major tectonic events that triggered the formation of unconformities at different hierarchical levels during the late early to middle Miocene. These unconformities subdivide the Miocene facies into five depositional sequences separated by basin-wide erosional boundaries. This division greatly improves the age control of marginal marine facies. It affords new insight into the evolution of marginal marine facies along the western margin of the basin in relation to deeper facies in the basin centre. Facies and thickness changes in these tectonically induced sequences indicate that basin floor irregularities, subsidence rates, climatic changes, variable sediment influx, sea-level/brine-level changes and basin isolation/connection to the Mediterranean Sea are also important factors responsible for their evolution.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"36 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138544936","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}
引用次数: 0
Early Jurassic initiation of the modern drainage pattern of the Dabie orogen (East China) revealed by a multi-proxy provenance approach 多代物源方法揭示的大别造山带早侏罗世现代水系格局
IF 3.2 2区 地球科学
Basin Research Pub Date : 2023-12-01 DOI: 10.1111/bre.12834
Tao Deng, Xiumian Hu, David Chew, Jan Schönig, Anlin Ma, Wendong Liang, Foteini Drakou
{"title":"Early Jurassic initiation of the modern drainage pattern of the Dabie orogen (East China) revealed by a multi-proxy provenance approach","authors":"Tao Deng,&nbsp;Xiumian Hu,&nbsp;David Chew,&nbsp;Jan Schönig,&nbsp;Anlin Ma,&nbsp;Wendong Liang,&nbsp;Foteini Drakou","doi":"10.1111/bre.12834","DOIUrl":"10.1111/bre.12834","url":null,"abstract":"<p>The timing of the initiation of the present-day tectonic architecture and drainage systems in eastern China remains debated. This study presents a comprehensive provenance study of the Early Jurassic peripheral basins surrounding the Dabie orogen including framework petrography, heavy-mineral analysis, single-grain chronology and chemistry. Clasts of high-grade schist, muscovite grains, rare gneissic fragments, abundant metamorphic garnet and phengite (Si &gt; 3.3 pfu), combined with a main 216–256 Ma rutile U–Pb population found in these Early Jurassic sandstones, indicate a source from the Triassic (U)HP belt in the Dabie orogen. Sedimentary lithics and ultra-stable heavy-mineral assemblages indicate an additional source of recycled sedimentary rocks. Combined with the continuous shift of the youngest detrital rutile age population toward younger ages toward the north that mimics the pattern of metamorphic bedrock ages in the Dabie orogen, we infer that the present surface tectonic architecture and paleodrainage patterns of the Dabie orogen were established in the Early Jurassic. Thus, the Early Jurassic exhumation of the Dabie orogen marked the development of the watershed between Northern and Southern China, namely the Huai River and several principal tributary systems of the middle-lower Yangtze River.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"36 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138475840","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}
引用次数: 0
Stratigraphy, palaeogeography and evolution of the lower Nanaimo Group (Cretaceous), Georgia Basin, Canada 加拿大乔治亚盆地下纳奈莫群(白垩纪)地层学、古地理与演化
IF 3.2 2区 地球科学
Basin Research Pub Date : 2023-11-30 DOI: 10.1111/bre.12830
Kristian Girotto, Shahin E. Dashtgard, Chuqiao Huang, James A. MacEachern, H. Daniel Gibson, Gwyneth Cathyl-Huhn
{"title":"Stratigraphy, palaeogeography and evolution of the lower Nanaimo Group (Cretaceous), Georgia Basin, Canada","authors":"Kristian Girotto,&nbsp;Shahin E. Dashtgard,&nbsp;Chuqiao Huang,&nbsp;James A. MacEachern,&nbsp;H. Daniel Gibson,&nbsp;Gwyneth Cathyl-Huhn","doi":"10.1111/bre.12830","DOIUrl":"10.1111/bre.12830","url":null,"abstract":"<p>The Cretaceous lower Nanaimo Group in the Georgia Basin, Canada comprises multiple depositional phases with distinct depocentres that accumulated in a tectonically active forearc basin setting. Basal coarse-clastic strata are preserved in paleotopographic depressions and grade upwards into coal-bearing coastal plains and shallow-marine deposits. Coal-bearing and shallow-marine strata grade laterally into and are overlain by, regionally extensive mudstones and turbidites deposited in deep water. A glauconitic sandstone bed within the deep-water strata is interpreted as a condensed section and underlies a major disconformity that developed during a pause in the deposition of the lower Nanaimo Group. A second major coarse-clastic succession occurs hundreds of metres above the glauconite bed in the central Georgia Basin and comprises conglomerate, sandstone, mudstone and coal deposited in continental depositional environments. The shift in sedimentation from the northern Georgia Basin to the central Georgia Basin is interpreted to record the emergence of an island (Nanoose Uplift) in the central Georgia Basin that acted as a major sediment source to the adjacent depocentres. The stratigraphic break between the coal-bearing coarse-clastic strata in the northern Georgia Basin and the significantly younger coal-bearing coarse-clastic strata in the central Georgia Basin indicates that the lower Nanaimo Group was deposited in distinct depocentres. Between the older, coarse-clastic strata in the north and younger, coarse-clastic strata in the central Georgia Basin, we hypothesize that a major deepwater canyon system (Qualicum Canyon) existed and transferred sediment from the semi-restricted Georgia Basin to the Pacific Ocean to the west. Development of the Qualicum Canyon and exposure of the Nanoose Uplift during deposition of the younger, central coarse-clastic strata suggests that syntectonic activity drove basin uplift and erosion and this occurred throughout the deposition of the lower Nanaimo Group.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"36 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/bre.12830","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138455817","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}
引用次数: 0
High-frequency temporal variability of provenance signal in the submarine fan with the narrow shelf: Insights from sediment delivery and formation of late Triassic Zhuoni fan in the northeastern Paleo-Tethys Ocean 窄陆架海底扇物源信号的高频时间变异——来自古特提斯洋东北部晚三叠世卓尼扇沉积输运与形成的启示
IF 3.2 2区 地球科学
Basin Research Pub Date : 2023-11-30 DOI: 10.1111/bre.12835
Mingxuan Tan, Haonan Sun, Yilin Fu, Haonan Cui, Chengcheng Zhang
{"title":"High-frequency temporal variability of provenance signal in the submarine fan with the narrow shelf: Insights from sediment delivery and formation of late Triassic Zhuoni fan in the northeastern Paleo-Tethys Ocean","authors":"Mingxuan Tan,&nbsp;Haonan Sun,&nbsp;Yilin Fu,&nbsp;Haonan Cui,&nbsp;Chengcheng Zhang","doi":"10.1111/bre.12835","DOIUrl":"10.1111/bre.12835","url":null,"abstract":"<p>The submarine fan with a narrow shelf is usually reactive to environmental signal propagation; however, source-to-sink functioning can be further complicated by several allogenic forcings. Here, we document the high-frequency provenance variations and different sediment delivery models recorded in the late Triassic Zhuoni fan developed in the northeastern Paleo-Tethys Ocean, mainly based on process-based sedimentological and provenance study of the Panyuan section in the West Qinling area in the northeastern margin of Tibetan Plateau. High-, low-density turbidites, hybrid event beds and hyperpycnites are distributed in the lobe-dominated submarine fan succession. Field sedimentological evidence from surrounding outcrops suggests that shelf-edge failure was the main cause of most high- and low-density turbidites with the overall absence of submarine slides or slumps, whereas the narrow shelf configuration together with late Triassic humid pulses is favourable for the occurrence of flood-related hyperpycnites in the Zhuoni fan. Detrital zircon grains (<i>N</i> = 6; <i>n</i> = 123–272) generally have Palaeozoic-Mesozoic ages (ca. 350–250 Ma and 500–400 Ma) and Neoarchean-Paleoproterozoic ages (ca. 2100–1750 Ma and 2600–2400 Ma), but they can be further categized into three age groups due to different proportions of Precambrian age populations. The results demonstrate that the potential source areas may include the South and North Qinling Orogenic Belt, Qilian Orogenic Belt, different segments of North China Craton and the tectonic junction area between the Qinling and Qilian Orogenic Belts. The temporal changes in provenance signals, which are reflected by both the detrital zircon age spectra and heavy mineral assemblages, indicate different contributions of those sources in response to sea-level fluctuation. It could thus give rise to temporal variations between reactive and buffered source-to-sink sediment delivery models of the Zhuoni fan, despite the overall narrow shelf configuration. The development of the lowstand Zhuoni fan was directly related to extrabasinal hyperpycnal delivery from the river mouth and its high-frequency provenance variability recorded different efficiencies of signal transfer through the onshore catchment with significantly influence of temporal storage, fluvial rejuvenation or even regional climate variability. The highstand submarine fan was thought to be formed by shelf-edge failure with sediment buffering in the shelf region, which was associated with a strong magnitude of provenance mixing. Our work provides a new perspective for deciphering the different origins of deep-water sediment delivery in response to high-frequency sea-level and climate changes.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"36 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138473807","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}
引用次数: 0
Facies analysis and sequence stratigraphy of shallow marine, coarse-grained siliciclastic deposits in the southern Utsira High: The Late Jurassic intra-Draupne Formation sandstones in the Johan Sverdrup Field (Norwegian North Sea) 挪威北海Johan Sverdrup油田晚侏罗世draupne组砂岩:Utsira隆起南部浅海粗粒硅屑沉积相分析及层序地层学
IF 3.2 2区 地球科学
Basin Research Pub Date : 2023-11-29 DOI: 10.1111/bre.12833
Josep M. Puig López, Miquel Poyatos-Moré, John Howell
{"title":"Facies analysis and sequence stratigraphy of shallow marine, coarse-grained siliciclastic deposits in the southern Utsira High: The Late Jurassic intra-Draupne Formation sandstones in the Johan Sverdrup Field (Norwegian North Sea)","authors":"Josep M. Puig López,&nbsp;Miquel Poyatos-Moré,&nbsp;John Howell","doi":"10.1111/bre.12833","DOIUrl":"10.1111/bre.12833","url":null,"abstract":"<p>Thin, condensed coarse-grained shallow marine successions can be difficult to describe and interpret, especially in the subsurface since the recognition of finer-grained intervals, typically associated with sequence stratigraphic surfaces, is challenging. This lack of mudstones and siltstones means that they also typically make excellent reservoir intervals. The Oxfordian to Volgian intra-Draupne Formation sandstones in the Johan Sverdrup Field, southern Utsira High, represent such a system. This study presents a new sequence stratigraphic model for the Johan Sverdrup Field that unravels the detailed depositional history of the succession and places its formation within a regional Late Jurassic tectonostratigraphic framework. The intra-Draupne Formation sandstones comprise four parasequences deposited following a regional Kimmeridgian marine flooding event. Sediments were mainly supplied through West-derived fan deltas from the Haugaland High and NW-SE-directed tidal currents reworking the Augvald Graben and the Avaldsnes High at the East. The oldest parasequence shows a distinctive suite of facies consisting of fine-grained and mud-rich bioturbated sandstones deposited in a semi-restricted lagoon. Subsequent parasequences lack fine-grained sediments and are dominated by bidirectional cross-stratified, very coarse-to coarse-grained sandstones and gravels deposited in a tidal strait. A progressive reduction of fault-related subsidence in the Middle Volgian along with Late Volgian-Ryazanian sea-level rise and inversion of pre-existing structures promoted backstepping of the feeder systems, sediment starvation and the progressive deposition of the black and green-red shales of the Draupne and Asgard formations. The results of this study account for features previously unidentified in the Johan Sverdrup Field and which have implications for understanding the deposition of coarse-grained shallow marine successions around the Utsira High and other transgressed basement highs.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"36 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2023-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/bre.12833","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138455131","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}
引用次数: 0
Placing constraints on the nature of short-term eustatic curves 对短期波动曲线的性质加以限制
IF 3.2 2区 地球科学
Basin Research Pub Date : 2023-11-22 DOI: 10.1111/bre.12832
Andrew Davies, Michael D. Simmons
{"title":"Placing constraints on the nature of short-term eustatic curves","authors":"Andrew Davies,&nbsp;Michael D. Simmons","doi":"10.1111/bre.12832","DOIUrl":"10.1111/bre.12832","url":null,"abstract":"<p>The isolation of the eustatic signal from the sedimentary record is a challenging task, and accordingly, there is no consensus on the magnitude and pace (rate) of eustatic events in the geological record. Here we critically assess various published short-term Cretaceous eustatic curves using insights from forward stratigraphic modelling. We generate a range of simulations with varying eustatic rates and sediment supply against a background of constant subsidence. From these, we generate statistics on the accommodation change associated with the various systems tracts for different sediment supply. We quantify the minimum rate needed to generate transgressive systems tracts (TST). Using this threshold and average subsidence rates for passive margins and intracratonic basins, we document some key challenges with a range of Cretaceous eustatic curves. While it is possible to complexify, this approach through the inclusion of other parameters, our results provide a framework for evaluating eustatic (or relative sea level) curves in terms of the implied rate of change of accommodation. Given these caveats, we also show that many estimates of the magnitude of short-term transgressions are of insufficient rate to generate observable TST. Further, our work places an upper limit on the time frame over which aquifer and thermo-eustasy can have observable impacts on the rock record, providing support for the action of glacio-eustasy during the Cretaceous.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"36 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2023-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138297203","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}
引用次数: 0
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