Basin Research最新文献

{"title":"Reconstructing the Zama (Mexico) discovery source to sink palaeogeography, Part II: Sediment routing from the Late Miocene shelf-margin to deepwater basin","authors":"J. W. Snedden,&nbsp;M. G. Rowan,&nbsp;D. F. Stockli,&nbsp;M. Albertson,&nbsp;J. Pasley","doi":"10.1111/bre.12849","DOIUrl":"https://doi.org/10.1111/bre.12849","url":null,"abstract":"<p>The Late Miocene source terrane tectonic history in the southern Gulf of Mexico Basin, as informed by detrital zircon geothermochronology data, supports a detailed regional palaeogeographic reconstruction from palaeoshoreline to the deepwater Zama minibasin of the Sureste salt basin. Seismic mapping points to a trio of pathways that converge upon two entry points into the Zama minibasin, illuminating how sediment gravity flows transit a complex seascape defined by shallow salt bodies. Consideration of empirical scaling relationships within and between segments of this sediment dispersal system allows for testable predictions of Upper Miocene submarine fan-runout lengths over basin exploration areas. Distances from the reconstructed shelf-margin to the Zama wells vary around 100 km, an increase of 20% over a straight-line distance as flows likely navigated around extant salt stocks, walls and sheets. This 100-km fan length is about 40% of the reconstructed minimum palaeo-river length, within predicted ranges for smaller source-to-sink systems in tectonically active areas (25 to 50%). The estimated fan-runout distance can be extended even further basinwards, considering the contemporaneous passage of the mobile Chortis block along the Tonala shear zone, expanding the Palaeo-Rio Grijalva drainage network during the Tortonian. These Late Miocene deepwater systems linked to the Palaeo-Rio Grijalva differ substantially from onshore Mexico-sourced turbidity flows feeding into the axis of the north-trending Veracruz Trough. Textural data from wells here suggests these systems were less effective at larger grain transport and sorting. Local (intrabasinal) variations are also evident within the Zama minibasin, as well data (image logs and cores) indicate that axially oriented sediment gravity flows involved fewer high-density turbidities, depositing lower net-to-gross sandstones and thicker shales than those flowing transverse to the basin axis from a southeastern basin entry point. These interpretations will guide both local exploitation of these economic resources and could also support future exploration for analogous salt-influenced deepwater reservoir systems in the Sureste basin and globally.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"36 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139695311","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":"Neogene evolution of the margin adjacent to the La Plata River Delta (Pelotas Basin): Sedimentary pathways and the origins of the Rio Grande Cone","authors":"Gabriel Tagliaro,&nbsp;Adolfo Britzke,&nbsp;Mateus A. C. Gama,&nbsp;Pedro Bauli,&nbsp;André P. Negrão,&nbsp;Luigi Jovane","doi":"10.1111/bre.12848","DOIUrl":"10.1111/bre.12848","url":null,"abstract":"<p>Continental margins that exhibit high terrigenous input are generally located near deltas that are capable of transporting large quantities of sediments into the basin. However, in rare cases, high terrigenous sedimentation occurs in regions deprived of major riverine systems where the sedimentary pathway is enigmatic. One such case is the Neogene of the Pelotas Basin of Brazil and Uruguay, adjacent to the La Plata River mouth. Since the Miocene, anomalous sedimentation formed a giant progradational wedge, the Rio Grande Cone, one of the largest submarine fan-like features on Earth. To understand the Neogene evolution of the margin and the origins of the Rio Grande Cone, here we present a seismic-stratigraphic framework based on well-logs and 2D seismic data. Three depositional environments are identified: (1) on the shelf, upper Miocene to Pliocene fluvial channels delivered sand deposits on the mud-dominated shelf; (2) on the slope, sediment instability resulted in structural deformation and multiple phases of mass transport deposition and (3) on the lower slope and basin floor, large contourite drifts formed by sediment reworking. We classify the Rio Grande Cone as a megaslide complex, due to its depositional and structural setting. Local deltaic systems were active on the shelf in the Neogene, but the limited size of their paleo-drainage systems in comparison to the volume of sedimentation in the margin suggests that an additional sedimentary pathway existed. In this sense, the demise of an epicontinental sea over the La Plata Basin during the Neogene likely enabled the input of large volumes of fine sediments into the margin, via the La Plata plume water. We suggest that the desiccation of this epicontinental sea and the intensification of ocean currents since the middle Miocene explains the anomalous Neogene terrigenous influx into the SW Atlantic margin.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"36 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139655965","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":"Tectonic control on the palaeogeographic evolution of thrust-top basins at the active margin of the Guadalquivir Basin (central Betic Cordillera, S Spain)","authors":"Julio Aguirre,&nbsp;Juan C. Braga,&nbsp;José M. Martín,&nbsp;Ángel Puga-Bernabéu","doi":"10.1111/bre.12847","DOIUrl":"https://doi.org/10.1111/bre.12847","url":null,"abstract":"<p>The Guadalquivir Basin is the foreland basin of the Betic Cordillera (S Spain). Closest to the orogen, several thrust-top basins evolved during the Late Miocene in the central part of the cordillera. Here, we study the Upper Miocene deposits in five of these satellite basins: Montefrío, Iznájar-Cuevas de San Marcos, Antequera, Bobadilla Estación and Teba, in order to (1) update the stratigraphic framework, (2) infer a depositional model, (3) establish the relationship between sedimentary record and tectonic context and (4) reconstruct the palaeogeography of the area during the Late Miocene. Upper Miocene sediments mostly consist of mixed carbonate-terrigenous deposits. Facies characterization allows inferring a sedimentary model corresponding to a ramp with foreshore deposits changing to a shoal belt offshore in the inner ramp. Swaley and hummocky cross-stratified deposits formed in the transition to the middle ramp, and plane parallel carbonate beds in the distal middle-outer ramp. Factory facies, dominated by rhodoliths and bryozoans, also occur in the middle-outer ramp environments. Silts and marls formed in the deepest outer ramp and basin settings respectively. Breccias accumulated at the toe of palaeocliffs and conglomerates and massive coarse sands were deposited in fluvio-deltaic systems. Conglomerates and sands were also reworked as gravity flows and redeposited offshore. Local facies include rudstones-grainstones displaying large-scale trough-cross bedding formed in a strait in Montefrío, and marls with chalky carbonates deposited in a shallow marine, sheltered lagoon with hydromorphic soils in Bobadilla Estación. The study basins evolved in an N-S compressive tectonic context responsible of the emersion of the main Betic reliefs. Concomitantly, E-W and ESE-WNW extension originated the main depocentres. The influence of the tectonic activity on the sedimentary infills is indicated by the presence of synsedimentary deformations and several diachronic unconformities, which are younger westward. Tectonism, in turn, also controlled the palaeogeographic evolution during the late Tortonian-early Messinian interval.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"36 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/bre.12847","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139676630","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":"Translation, collision and vertical-axis rotation in the Organyà and Montsec minibasins (South-Central Pyrenees, Spain)","authors":"Jesús García-Senz,&nbsp;Berta López-Mir,&nbsp;Alejandro Robador,&nbsp;Jaume Dinarès-Turell,&nbsp;Antonio Pedrera","doi":"10.1111/bre.12846","DOIUrl":"10.1111/bre.12846","url":null,"abstract":"<p>This paper presents a sequentially restored cross-section of the Organyà and Montsec minibasins based on geological mapping, new field observations and available borehole data. The main objective was to describe the geometry and evolution of both basins in terms of salt tectonics and minibasin mobility. To this end, a comprehensive palaeomagnetic database has been used to constrain vertical-axis rotations potentially related to minibasin translation and pivoting. The Organyà minibasin constitutes an asymmetric depocentre formed during the Upper Jurassic-Lower Cretaceous by translation above a southerly inclined salt layer. Salt evacuation and minibasin touchdown induced salt accumulation on the northern side of the basin that culminated in the development of the major Santa Fe unconformity during the late Albian—early Cenomanian. Indicative of salt quiescence is the following isopachous Cenomanian to lower Santonian sequence Salt tectonics resumed during the late Santonian—Palaeocene, with the Montsec minibasin downbuilding coinciding with the onset of Pyrenean convergence. Changes of the base-salt topography reflects regional-scale geodynamic processes. The acceleration of crustal thinning in the North Pyrenean zone during the late Albian-early Cenomanian favoured uplift in the Axial Zone, increasing slope and triggering salt mobilization in the Southern Pyrenees. Likewise, the onset of contraction renewed the downslope gliding of the Organyà and Montsec minbasins, and supports the idea that the early stages of basin inversion were governed by gravity tectonics. The kinematic reconstruction suggests that the more that 30° counterclockwise vertical axis rotation records pivoting during the suprasalt translation of the Organyà minibasin rather than solely the Iberian microplate rotation.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"36 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/bre.12846","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139655722","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":"Rift segmentation caused by reactivation of multiple basement structure systems: Evidence from the Hailar-Tamtsag Rift, northeast Asia","authors":"Lulu Wu,&nbsp;Chuanbo Shen,&nbsp;Douglas A. Paton,&nbsp;Yanping Hou,&nbsp;Estelle J. Mortimer,&nbsp;Xiaowei Zeng,&nbsp;Wei Wu,&nbsp;Junfeng Lin","doi":"10.1111/bre.12841","DOIUrl":"https://doi.org/10.1111/bre.12841","url":null,"abstract":"<p>Since the influence of structural inheritance on rift geometry has been widely documented, it is easy to assume that rift segmentation, a prominent feature of rift geometry, may have been also influenced by structural heterogeneity. However, limited studies using high-quality seismic data have considered how basement reactivation is accommodated at individual fault scale and then how this results in rift segmentation at sub-basin scale. Using extensive high-quality 3D seismic data and 76 borehole data, we investigate the characteristics of rift architecture, rift-related fault systems, basement structures and rift evolution in the Hailar-Tamtsag Rift, northeast Asia. We identify three distinct rift segments which are defined by three rift-related fault systems and accompanied by three underlying basement structure systems. We recognize three phases of basement reactivation and three types (including five styles) of interactions between basement structures and rift-related faults. Our study shows that rift segmentation has been caused by reactivation of multiple basement structure systems which not only influence the orientation of rift segments and type of rift architecture, but also control the location, strike, dip and style of the major rift-related faults. Rift segmentation was completely achieved through multiple phases of basement reactivation, while the main structural framework of segmentation was established through ‘extensive reactivation’ during the second phase extension. Our study examines how multiple basement structure systems control rift segmentation at both individual fault and sub-basin scales, which can significantly improve our understanding of relationship between structural inheritance and rift segmentation.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"36 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139494564","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":"Syn-rift tectono-stratigraphic development of the Thebe-0 fault system, Exmouth Plateau, offshore NW Australia: The role of fault-scarp degradation","authors":"Candela Martinez,&nbsp;Domenico Chiarella,&nbsp;Christopher A.-L. Jackson,&nbsp;Harry Rennie,&nbsp;Nicola Scarselli","doi":"10.1111/bre.12842","DOIUrl":"https://doi.org/10.1111/bre.12842","url":null,"abstract":"<p>The syn-rift architecture of extensional basins records deposition from and interactions between footwall-, hangingwall-, and axially-derived systems. However, the exact controls on their relative contributions and the overall variable depositional architecture, and how their sediment volume varies through time, remains understudied. We undertook a quantitative approach to determine temporal and spatial changes in the contribution of fault-scarp degradation to the syn-rift tectono-stratigraphic development of the Thebe-0 fault system on the Exmouth Plateau (NW Shelf, offshore Australia), using high-quality 3D seismic reflection and boreholes data. The magnitude of footwall erosion was measured in terms of vertical (VE) and headward (HE) erosion by calculating the volume of eroded material along the footwall scarp. A detailed seismic-stratigraphic and facies analysis allowed us to constrain the architectural variability of the hangingwall depositional systems and the types of resulting deposits (i.e., fault-controlled base-of-scarp, settling from suspension, and hangingwall-derived). After addressing the syn-rift tectono-stratigraphic framework, we suggest that periods of significant erosion along the Thebe-0 fault scarp are related to the accumulation of fault-controlled base-of-scarp deposits characterised by comprising a lower wedge with chaotic to low-continuity reflections. Footwall-derived deposits characterised by an upward decrease in stratigraphic dip are interpreted as related to periods of reduced fault activity and sustained sediment delivery sourced from the footwall scarp and systems beyond it (e.g., antecedent systems). We then analysed the tectono-stratigraphic framework and the volumetric comparison between material eroded from the fault-scarp and accumulated in the basin, aiming to estimate the contribution of fault-scarp degradation to the hangingwall syn-rift fill. Our results suggest periods of enhanced fault activity control fault-scarp degradation variability through time, and we agree with that described by previous researchers—fault throw variability along-strike regulates the variability in the magnitude of erosion. However, we propose that fault-scarp degradation timing and its spatial variability are also influenced by the interaction and linkage with adjacent normal faults and by sea level variations. Lastly, we determine broader similarities and differences with a system located in the same fault array (i.e., Thebe-2 fault system), aiming to give insights into the tectono-stratigraphic evolution of a broader area and the spatial variability in fault-scarp degradation.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"36 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/bre.12842","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139494566","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":"Integrated uplift, subsidence, erosion and deposition in a tightly coupled source-to-sink system, Pagliara basin, northeastern Sicily, Italy","authors":"F. Pavano,&nbsp;F. J. Pazzaglia,&nbsp;T. M. Rittenour,&nbsp;S. Catalano,&nbsp;L. B. Corbett,&nbsp;P. Bierman","doi":"10.1111/bre.12845","DOIUrl":"https://doi.org/10.1111/bre.12845","url":null,"abstract":"<p>How tectonic forcing, expressed as base level change, is encoded in the stratigraphic and geomorphic records of coupled source-to-sink systems remains uncertain. Using sedimentological, geochronological and geomorphic approaches, we describe the relationship between transient topographic change and sediment deposition for a low-storage system forced by rapid rock uplift. We present five new luminescence ages and two terrestrial cosmogenic nuclide paleo-erosion rates for the late Pleistocene Pagliara fan-delta complex and we model corresponding base level fall history and erosion of the source catchment located on the Ionian flank of the Peloritani Mountains (NE-Sicily, Italy). The Pagliara delta complex is part of the broader Messina Gravel-and-Sands lithostratigraphic unit that outcrops along the Peloritani coastal belt as extensional basins have been recently inverted by both normal faults and regional uplift at the Messina Straits. The deltas exposed at the mouth of the Pagliara River have constructional tops at ca. 300 m a.s.l. and onlap steeply east-dipping bedrock at the coast to thickness between ca. 100 and 200 m. Five infrared-stimulated luminescence (IRSL) ages collected from the delta range in age from ca. 327 to 208 ka and indicate a vertical long-term sediment accumulation rate as rapid as ca. 2.2 cm/yr during MIS 7. Two cosmogenic ¹⁰Be concentrations measured in samples of delta sediment indicate paleo-erosion rates during MIS 8–7 near or slightly higher than the modern rates of ca. 1 mm/yr. Linear inversion of Pagliara fluvial topography indicates an unsteady base level fall history in phase with eustasy that is superimposed on a longer, tectonically driven trend that doubled in rate from ca. 0.95 to 1.8 mm/yr in the past 150 ky. The combination of footwall uplift rate and eustasy determines the accommodation space history to trap the fan-deltas at the Peloritani coast in hanging wall basins, which are now inverted, uplifted and exposed hundreds of metres above the sea level.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"36 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/bre.12845","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139480477","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":"Middle Miocene volcanic flare up preceding and synchronous with the Langhian/Serravallian sea-level decline in the North Pannonian Basin: Insights from 40Ar/39Ar dating, geo-seismic analysis and 3D visualization of the subterranean Kráľová stratovolcano","authors":"Samuel Rybár,&nbsp;Katarína Šarinová,&nbsp;Fred Jourdan,&nbsp;Celia Mayers,&nbsp;Ľubomír Sliva","doi":"10.1111/bre.12844","DOIUrl":"https://doi.org/10.1111/bre.12844","url":null,"abstract":"<p>The Pannonian Basin System originated from the collision of the African and European tectonic plates, followed by the Miocene extensional collapse that led to the development of a back-arc basins. Accurate dating is essential to comprehend the tectono-volcanic evolution of the region, particularly in the under-studied Danube Basin. Single-grain ⁴⁰Ar/³⁹Ar dating has revealed that volcanic activity in the Danube Basin commenced around 14.1 million years ago, aligning with previous biostratigraphic and radioisotope data from nearby volcanic fields. The initial Middle Miocene pyroclastic deposits were generated by intermediate high K calc-alkaline magmas, contributing significantly to the deposition of thick layers of fine vitric tuffs. The timing and chemistry of the volcanism are consistent with the Badenian rift phase in the Middle Miocene within the Carpathian–Pannonian region, suggesting an intraplate back-arc volcanic environment. Three-dimensional imaging has exposed the buried Kráľová stratovolcano, revealing its impressive scale with a thickness between 2620 and 5000 m and a base diameter of 18–30 km. Such dimensions place it among the ranks of the world's largest stratovolcanoes, indicating its substantial impact on the evolution of the Carpathian–Pannonian area. The complex formation history of the stratovolcano points to multiple phases of growth. Furthermore, the basin controlling Mojmírovce-Rába fault's intersection with the stratovolcano implies that fault activity was subsequent to the volcanic activity, being younger than 14.1 million years. Regional age data consistently indicates that volcanic activity in the Danube Basin reached its zenith just prior to and during the lower/upper Badenian sea-level fall (Langhian/Serravallian). K-metasomatism is unique to the stratovolcanic structures and is not observed in the wider regional setting. This study supports the notion of an intricate, interconnected subterranean intrusive system within the stratovolcano, underscoring the complex interplay between geological structures and volcanic processes.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"36 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/bre.12844","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139406983","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":"Thermal evolution and sediment provenance of the Cooper–Eromanga Basin: Insights from detrital apatite","authors":"Angus L. Nixon,&nbsp;Nicholas Fernie,&nbsp;Stijn Glorie,&nbsp;Martin Hand,&nbsp;Betina Bendell","doi":"10.1111/bre.12843","DOIUrl":"https://doi.org/10.1111/bre.12843","url":null,"abstract":"<p>The prolific hydrocarbon and geothermal potential of the Cooper–Eromanga Basin has long been recognised and studied, however, the thermal history which underpins these resources has largely remained elusive. This study presents new apatite fission track and U–Pb data for eight wells within the southwestern domain of the Cooper–Eromanga Basin, from which thermal history and detrital provenance reconstructions were conducted. Samples taken from sedimentary rocks of the upper Eromanga Basin (Winton, Mackunda and Cadna-owie Formations) yield dominant Early-Cretaceous and minor Late-Permian–Triassic apatite U–Pb ages that are (within uncertainty) equivalent to corresponding fission track age populations. Furthermore, the obtained Cretaceous apatite ages correlate well with the stratigraphic ages for each analysed formation, suggesting (1) little time lag between apatite exposure in the source region and sediment deposition, and (2) that no significant (&gt;ca. 100°C) reheating affected these formations in this region following deposition. Cretaceous apatites were likely distally sourced from an eastern Australian volcanic arc, (e.g. the Whitsunday Igneous Association), and mixed with Permian–Triassic sediment sources from the New England and/or Mossman Orogens. Deeper samples (&gt;2000 m) from within the southwestern Cooper Basin yielded partially reset fission track ages, indicative of heating to temperatures exceeding ca. 100–80°C after deposition. The associated thermal history models are broadly consistent with previous studies and suggest that maximum temperatures were reached at ca. 100–70 Ma as a result of hydrothermal circulation correlating with high rates of sedimentation. Subsequent Late-Cretaceous–Palaeogene cooling is interpreted to reflect post magmatic thermal subsidence and cessation of hydrothermal activity, as well as potential modified rock thermal conductivity as a response to fluid flow. Five of the seven modelled wells record a Neogene heating event, the geological significance of which remains tentative but may suggest possible reactivation of the Cooper Hot Spot and associated hydrothermal circulation.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"36 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/bre.12843","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139406986","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":"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}