Depositional Record最新文献

{"title":"Sedimentology and reservoir characterisation of Lower Jurassic clastic sedimentary rocks, Salt and Trans Indus Ranges, Pakistan: Evidence from petrography, scanning electron microscopy and petrophysics","authors":"Salman Ahmed Khattak,&nbsp;Nasar Khan,&nbsp;Waseem Khan,&nbsp;S. Sahaya Jude Dhas,&nbsp;George Kontakiotis,&nbsp;Ihtisham Islam,&nbsp;Hammad Tariq Janjuhah,&nbsp;Assimina Antonarakou","doi":"10.1002/dep2.325","DOIUrl":"https://doi.org/10.1002/dep2.325","url":null,"abstract":"<p>In this study, sandstones of the Lower Jurassic Datta Formation in the Salt and Trans-Indus ranges are investigated regarding composition, diagenesis, provenance and reservoir properties using petrography, scanning electron microscopy and petrophysical analysis. The detrital mineral composition of the Datta Formation indicated that the sandstones are quartzose, lithic-quartzose, lithic-feldspatho-quartzose, lithic-quartzo-feldspathic, quartzo-lithic and feldspatho-quartzose, primarily from the recycled orogen setting, including the Malani Igneous Suite, the Aravali Range and Nagar Parkar. The Datta Formation has sub-angular to well-rounded, fine to coarse and moderate to well-sorted grains. Numerous diagnostic processes that occurred in the early to late stages of diagenesis, such as compaction, pressure solution, cementation, alteration, dolomitisation and dissolution, are supported by evidence in the Datta Formation. Dissolution, physical compaction, dolomitisation and alteration enhanced the reservoir quality, while pressure solution and cementation reduced the reservoir quality of the Datta Formation. The porosity types detected in the Datta Formation under scanning electron microscopy are vuggy, intracrystalline/intraparticle, dissolution and intercrystalline, with an average petrographic visual porosity of 11%. The petrophysical aspects of the Datta Formation in the Chonai-01 well and the correlation between four wells indicated that the hydrocarbons had shifted up-dip towards the Isa-Khail-01 well, so it is recommended for drilling because of the greater depositional thickness. The comparison of the Datta Formation with age-equivalent units in other regions of eastern Tethys provided a better understanding of reservoir heterogeneities that can be applicable in areas with similar geological conditions for future petroleum exploration.</p>","PeriodicalId":54144,"journal":{"name":"Depositional Record","volume":"11 2","pages":"698-717"},"PeriodicalIF":1.9,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dep2.325","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143846093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Mixed clastic-carbonate lake margin systems: An example from the Triassic of East Greenland","authors":"Steven D. Andrews,&nbsp;Li Guo","doi":"10.1002/dep2.324","DOIUrl":"https://doi.org/10.1002/dep2.324","url":null,"abstract":"<p>Lake margin deposits are the subject of increased study, but this is often focussed on either clastic or carbonate/microbial dominated end members. This study examines the interaction of clastic and carbonate systems. The Upper Triassic Edderfugledal Formation in East Greenland provides superb exposures through a carbonate dominated lacustrine succession. Fluctuations in lake level, interpreted as a response to cyclic, orbitally forced, climatic variance resulted in a highly mobile lake shore zone. The response of the shore zone environment to these fluctuations in lake level, and the interaction of both clastic and carbonate components, are documented in this study. A general trend from more arid to more humid conditions is recognised through the Edderfugledal Formation. This trend is reflected in a transition from more ephemeral lacustrine conditions with low sediment input to conditions where lacustrine episodes were more prolonged and clastic input was increased. Deposits reflecting more ephemeral conditions are dominated by extensive post-depositional disruption including desiccation, pedogenic processes and evaporite precipitation. These effects increase towards the lake margins where exposure was most common and most prolonged. Increasingly humid conditions and the associated longer-lived lacustrine developments and increased clastic sediment input resulted in a very different form of lake margin. During transgressive phases sediment input was pushed back to the lake margin allowing extensive microbialite development. Ooidal shoals developed in shallow water beyond the extent of clastic input. The lakeward migration of the ooidal shoals and the progradation of clastic systems eventually stifled the microbialites prior to the next transgressive event. In a mixed clastic-carbonate lacustrine setting the interaction of sediment supply and production are key factors in governing facies development and these are in turn predominantly controlled by lake-level change and lake margin bathymetry.</p>","PeriodicalId":54144,"journal":{"name":"Depositional Record","volume":"11 2","pages":"675-697"},"PeriodicalIF":1.9,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dep2.324","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143846137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Interglacial dust, ocean fertilisation and Neoproterozoic earth oxygenation","authors":"Leandro G. DaSilva,&nbsp;Peir K. Pufahl,&nbsp;Noel P. James","doi":"10.1002/dep2.323","DOIUrl":"https://doi.org/10.1002/dep2.323","url":null,"abstract":"<p>Feedback processes that drove Earth's second major increase in ocean–atmosphere oxygen levels during the Neoproterozoic are poorly constrained. Variability in seawater redox over geological timescales is commonly linked to changes in the biogeochemical cycling of P and thus the rate of primary production and generation of photosynthetic oxygen. In the modern surface ocean, an important source of bioessential P and micronutrients (Fe, Cu, Co, Zn, Mo, Cr and Ni) is aeolian dust derived from deserts and arid, post-glacial landscapes. It is interpreted herein that glacial retreat following the Sturtian (<i>ca</i> 717 to 660 Ma) and Marinoan (<i>ca</i> 650 to 635 Ma) snowball glaciations provided copious dust to the global ocean. Correlation of interglacial siltstone successions in palaeogeographical context suggests that such dust accumulation was diachronous and concentrated in the palaeo-horse latitudes (30° N and 30° S). Delivery of this dust from continents is likely reflected in the steep increase in global radiogenic Sr isotope values (⁸⁷Sr/⁸⁶Sr) in post-Sturtian carbonates, and changes in the δ¹⁸O signatures of Cryogenian zircons derived from subducted marine sediments. Accumulation of sedimentary organic matter also peaked during interglacial periods, suggesting a causal link between glaciation, aeolian dust and primary production. This relationship implies windblown dust was an important source of P and micronutrients for an evolving biological pump that stimulated primary production, enhanced burial of organic carbon and increased ocean–atmosphere oxygen concentrations. Thus, delivery of aeolian dust to the global ocean was likely critical for sustaining Earth's second major increase in oxygen. Sequestration of atmospheric CO₂ in organic-rich siltstones and shales is also interpreted to have been an important negative feedback process, which together with silicate weathering, prevented runaway greenhouse conditions during interglacial periods. The oxygen produced by this aeolian marine biological pump may have helped pave the way for the evolution of multicellular animals in the Ediacaran.</p>","PeriodicalId":54144,"journal":{"name":"Depositional Record","volume":"11 2","pages":"654-674"},"PeriodicalIF":1.9,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dep2.323","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Smithian–Spathian carbonate geochemistry in the northern Thaynes Group influenced by multiple styles of diagenesis","authors":"Jordan P. Todes,&nbsp;Franziska R. Blattmann,&nbsp;Torsten Vennemann,&nbsp;Elke Schneebeli-Hermann,&nbsp;Hugo Bucher,&nbsp;Dan P. Razionale,&nbsp;Clara L. Blättler","doi":"10.1002/dep2.321","DOIUrl":"https://doi.org/10.1002/dep2.321","url":null,"abstract":"<p>The Smithian–Spathian boundary interval is characterised by a positive carbon isotopic excursion in both δ¹³C_carb and δ¹³C_org, concurrent with a major marine ecosystem reorganisation and the resurgence of microbialite facies. While these δ¹³C records have been traditionally interpreted as capturing global carbon cycle behaviour, recent studies have suggested that at least some excursions in early Triassic δ¹³C values may incorporate influences from authigenic or early diagenetic processes. To examine the mechanistic drivers of Smithian–Spathian boundary geochemistry, the carbonate geochemistry of a core from Georgetown, Idaho (USA), was analysed using a coupled δ^44/40Ca, δ²⁶Mg and trace-metal framework. While the δ¹³C record in the Georgetown core is broadly similar to other Smithian–Spathian boundary sections, portions of the record coincide with substantial shifts in δ^44/40Ca, δ²⁶Mg and trace-metal compositions that cannot feasibly be interpreted as primary. Furthermore, these geochemical variations correspond with lithology: The δ¹³C record is modulated by variations in the extent of dolomitisation, and the diagenetic styles recognised here coincide with individual lithostratigraphic units. A primary shift in local sea water δ¹³C values is inferred from the most geochemically unaltered strata, from <i>ca</i> 3‰ in the middle Smithian to <i>ca</i> 5‰ in the early Spathian, although the timing and pathway through which this occurs cannot be readily identified nor extrapolated globally. Therefore, the Georgetown core may not directly record exogenic carbon cycle evolution, showing that there is a need for the careful reconsideration of the Smithian–Spathian boundary—and more broadly, Early Triassic—geochemical records to examine potential local and diagenetic influences on sedimentary geochemistry.</p>","PeriodicalId":54144,"journal":{"name":"Depositional Record","volume":"11 2","pages":"616-636"},"PeriodicalIF":1.9,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dep2.321","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Evidence for subsidence rate variation in the Newark Basin and its influence on the deposition of fluvial sediments of the Stockton Formation","authors":"Jane L. Alexander,&nbsp;Sean T. Thatcher,&nbsp;Jay Tobon,&nbsp;Victoria Rivelli","doi":"10.1002/dep2.322","DOIUrl":"https://doi.org/10.1002/dep2.322","url":null,"abstract":"<p>The Stockton Formation of the Newark Basin represents an exciting time in Earth history during the early stages of rifting of the North Atlantic, with rapid subsidence and sediment deposition. Much of the previous work on this formation has been done using drill cores, with development limiting surface exposure. While this allows us to build a full stratigraphic sequence of deposition, it has the potential to miss smaller-scale variability and sedimentary structures. It is also difficult to understand the three-dimensional geometries, architecture and relationships between the depositional elements from drill core alone. An outcrop in North Bergen, NJ that was recently exposed during construction provided an opportunity to study the primary and secondary sedimentary structures of a previously hidden part of the Stockton Formation. These sediments and structures were investigated in the field and laboratory, with geochemical data assisting in the interpretation of their origin and history. Despite its small size, this outcrop provides strong evidence for varying rates of basin subsidence, with rocks deposited during more rapid subsidence also showing secondary structures associated with major earthquakes. Rapid subsidence during fluvial deposition resulted in the preservation of more fine-grained, lower-porosity sediments. Recently the Newark Basin has been identified as having characteristics that are favourable for CO₂ storage, however, a detailed understanding of sedimentary lithologies is essential to assessing that potential. If these periods of rapid subsidence have similar lithological consequences basin-wide, this could potentially impact the capacity for carbon sequestration, by reducing porosity and permeability in many areas, and potentially creating barriers to flow.</p>","PeriodicalId":54144,"journal":{"name":"Depositional Record","volume":"11 2","pages":"637-653"},"PeriodicalIF":1.9,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dep2.322","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Coming to light: How effective are sediment gravity flows in removing fine suspended carbonate from reefs?","authors":"Jaco H. Baas,&nbsp;William Hewitt,&nbsp;Stephen Lokier,&nbsp;James Hendry","doi":"10.1002/dep2.319","DOIUrl":"https://doi.org/10.1002/dep2.319","url":null,"abstract":"<p>Coral reefs are hard calcified structures, mainly found in warm tropical water. These ecosystems serve important roles as, for example, a source of food, shelter and nursery for different organisms, and in coastal protection. Reef-building organisms have evolved to inhabit a narrow ecological niche and thus are particularly susceptible to rapid changes in their environment, for example, under predicted climate-change scenarios. Anthropogenic climate change is widely accepted as the leading cause of rising ocean temperatures, sea water acidity and sedimentation rate, which all affect a coral's productivity, health and, to some extent, skeletal strength. High-energy weather events, such as storms and hurricanes, can erode reefs, thereby increasing the amount of suspended sediment and consequently the turbidity of the water. The removal of suspended sediment from the reef is vital for the health of reef producers, and a natural process that removes suspended sediment from reefs are sediment gravity flows. A key factor that controls the ability of sediment gravity flows to transport sediment is cohesion, as cohesion determines the run-out distance of a flow through changes in its rheological properties. This study examines the cohesive nature of sediment gravity flows laden with fine-grained CaCO₃. These gravity flows laden with mud-grade calcite are compared with flows carrying non-cohesive, silt-sized, silica flour, weakly cohesive kaolinite clay and strongly cohesive bentonite clay, by means of laboratory experiments. The results of these experiments show that the mud-grade calcite flows behave more akin to the silica-flour flows by reaching maximum mobility at considerably higher volumetric suspended sediment concentrations (47% for silica flour and 53% for CaCO₃) than the kaolinite and bentonite flows (22% for kaolinite and 16% for bentonite). Fine CaCO₃ gravity flows can therefore be regarded as physically non-cohesive, and their high mobility may constitute an effective mechanism for removing suspended sediment from coral reefs, especially at locations where a slope gradient is present, such as at the reef front and forereef. However, biological cohesion, caused by ‘sticky’ extracellular polymer substances produced by micro-organisms, can render mud-grade calcite cohesive and sediment gravity flows less mobile. The present study should therefore be seen as a first step towards a more comprehensive analysis of the efficiency of removal of suspended sediment from coral reefs.</p>","PeriodicalId":54144,"journal":{"name":"Depositional Record","volume":"11 2","pages":"583-598"},"PeriodicalIF":1.9,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dep2.319","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Anatomy of modern sedimentary volcanoes produced by gas-charged groundwater liquefaction, Lake Powell, Hite, Utah: Implications for the recognition and interpretation of ancient sedimentary volcanoes","authors":"Michael C. Wizevich,&nbsp;Edward L. Simpson,&nbsp;Abigail Underwood,&nbsp;Laura Sherrod,&nbsp;Kelsey Livingston,&nbsp;Emily Bogner,&nbsp;Margariete Malenda","doi":"10.1002/dep2.320","DOIUrl":"https://doi.org/10.1002/dep2.320","url":null,"abstract":"<p>Numerous sedimentary volcanoes, recently exposed on the Colorado River delta surface at Lake Powell near Hite, Utah, were generated by sediment slurries propelled by gas, mainly microbially generated methane (CH₄). Two sedimentary volcanoes were excavated, one in 2016 and the other in 2019, in order to characterise the internal structures. Comparison of the internal structures of these features with those of previously documented seismic-generated sedimentary volcanoes helps in differentiating the various modes of mobilised sediment generation. Sedimentary volcanoes are commonly employed as tools in palaeoseismic reconstruction, thus it is important to establish criteria to differentiate non-seismic-generated sedimentary volcanoes and accompanying sediment deformation from those features generated by earthquakes. Trenches through the volcanoes and immediate subsurface areas reveal a complex cone stratigraphy of centimetre-scale graded sand-silt laminations and clastic dikes that cross-cut the cone and sub-cone (delta) sediment. Some cone strata have ripple cross laminations, a scoured base and are disrupted by soft-sediment deformation. In the 2016 volcano, the lowest 0.5 m of the dikes exposed in the trench are filled with organic-rich mud, but these conduits are empty nearer to the surface as a result of sediment settling after eruption cessation. The 2019 sedimentary volcano differs from the other by: (1) more cross laminations in the cone, (2) collapse structures surrounding the crater, (3) a relatively simple plumbing system assisted by desiccation-generated fissures and (4) a massive sediment infill of the vent. Both complex internal cone stratigraphy and the two distinct cross-cutting dike-conduit systems, unequivocally generated by recurrent gas and water discharge, add to the database of features for non-seismic-generated sedimentary volcanoes. This array of sedimentary structures from a non-seismic-generated sedimentary volcano demonstrates that certain features, including numerous internal laminations composing the cone and complex generations of dike systems are not unique to seismic-generated sand volcanoes.</p>","PeriodicalId":54144,"journal":{"name":"Depositional Record","volume":"11 2","pages":"599-615"},"PeriodicalIF":1.9,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dep2.320","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Hydrologically sensitive carbonates: Tectonic and groundwater controls on synrift sedimentation in the Late Jurassic–Early Cretaceous of the western Cameros Basin, Northern Spain","authors":"Nigel H. Platt,&nbsp;V. Paul Wright","doi":"10.1002/dep2.317","DOIUrl":"https://doi.org/10.1002/dep2.317","url":null,"abstract":"<p>Basin hydrology and subcrop are key controls on carbonate sedimentation in continental basins. Hydrologically sensitive carbonates can record groundwater fluctuations within an aquifer in deep time. Late Jurassic extension, footwall uplift, erosion and karstification of marine Jurassic carbonates in the western Cameros Basin (Spain) saw deposition of ?Upper Kimmeridgian-Tithonian syntectonic alluvial fan deposits (Señora de Brezales Formation). Biogenic laminar calcretes and phreatophytic rhizocretions record roots exploiting capillary fringe groundwater. Progressive infill of rift topography and footwall erosion lowered sedimentary gradients and clastic supply during deposition of the ?Tithonian–Berriasian Rupelo Formation. Distal alluvial marls (Las Viñas Member) contain charophytes, with 2 m thick carbonate lenses at the top reflecting intermittent rise of groundwater in ponds on the basin floor. Stacked palustrine limestones with rare charophytes and laminar calcretes (Ladera Member) record overstep of seasonal carbonate wetlands onto basin margins and footwall highs with intense pedogenetic modification during lengthy seasonal exposure. Overlying Berriasian charophyte-ostracod wackestones, displaying microkarst cavities and interbedded intraclastic conglomerates, with vivianite sauropod bones, footprints and polygonal desiccation cracks at the top (Mambrillas de Lara Member) record open lacustrine conditions with limited subaerial exposure and high water tables. Desiccation-cracked limestones and marls with correlatable evaporite horizons (Rio Cabrera Member) contain marginal marine foraminifera and dasycladaceae at the top. Lagoonal conditions reflected transgression to seaward and intermittent marine connection via the Basco-Cantabrian Basin. The distribution and thicknesses of hydrologically sensitive carbonates reflected onlap onto a faulted and karstified marine Jurassic carbonate pediment and the subtle influence on hydroperiod of fault (and potentially localised Triassic salt) controlled differential subsidence and transgressive groundwater rise. Hydrological facies evolution reflects progressive basin infilling and eustasy beyond. Transitions in this continental succession from clastic to carbonate facies and from closed to open hydrology record hydrological change over time rather than contemporaneous deposition under Walther's Law.</p>","PeriodicalId":54144,"journal":{"name":"Depositional Record","volume":"11 2","pages":"537-564"},"PeriodicalIF":1.9,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dep2.317","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143846095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 influence of syn-depositional compaction on clastic sediment distribution in river-dominated deltas: A modelling study","authors":"A. A. Valencia,&nbsp;J. E. A. Storms,&nbsp;H. R. A. Jagers,&nbsp;H. van der Vegt","doi":"10.1002/dep2.318","DOIUrl":"https://doi.org/10.1002/dep2.318","url":null,"abstract":"<p>Syn-sedimentary compaction or consolidation is an important process in deltaic environments because it affects both the local morphodynamics and hydrodynamics as well as the delta-scale accommodation space. However, the impact of syn-depositional compaction on the sediment distribution and the interdependency between different delta areas related to the sediment budget are not fully understood. This paper simulates syn-depositional compaction using improved 1D grain-size compaction formulations, integrated into hydrodynamic and morphodynamic modelling software Delft3D. The updated code is used to model sedimentation in mud-rich deltas under various compaction rate scenarios, which represents the maximum compaction rate potential of sediment that experiences the highest overburden stress in the delta. The simulated deltas are analysed by first classifying their plan-view area development into depositional elements: distributary channel, underfilled channel, delta plain, mouth bar, delta front and pro delta depositional elements. Then, sedimentation by mass, accommodation space and depositional segment metrics are calculated using the interpreted depositional elements. The results for zero compaction rate scenarios (0 mm year⁻¹) show that limited space-varying and temporal-varying accommodation is available to deposit sediment in the delta plain depositional element. Therefore, the sedimentation mainly occurs in the mouth bar depositional element. For low-mid compaction rate scenarios (0.01–1 mm year⁻¹), the additional syn-depositional accommodation space in the delta plain depositional element increases sedimentation in this area, limiting sedimentation in the mouth bar depositional element. For high compaction rate scenarios (&gt;1 mm year⁻¹), a further increase in the accommodation space in the delta plain depositional element leads to lateral sedimentation attributed to channel relocation, where the sedimentation mainly occurs in the mouth bar depositional element. This study shows that, although considered a gradual process, syn-sedimentary compaction does impact long-term delta evolution by influencing the distribution of sedimentation in the delta.</p>","PeriodicalId":54144,"journal":{"name":"Depositional Record","volume":"11 2","pages":"565-582"},"PeriodicalIF":1.9,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dep2.318","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143846027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Testing the fidelity of zircon as a provenance indicator in fluvial-fan successions: An example from the Palaeogene Colton Formation, Central Utah, USA","authors":"Davide Carraro,&nbsp;Sean P. Gaynor,&nbsp;Dario Ventra,&nbsp;Alexey Ulyanov,&nbsp;Andrea Moscariello","doi":"10.1002/dep2.316","DOIUrl":"https://doi.org/10.1002/dep2.316","url":null,"abstract":"<p>The stratigraphic, spatial and temporal variability of detrital zircon age populations in continental sedimentary successions is a critical tool in understanding palaeodrainage networks and how these systems distributed detritus within sedimentary basins. However, multiple factors, such as variations in sediment-transport processes, the scale of the depositional environment and the architecture of the sedimentary succession are often overlooked in detrital zircon studies. This article presents detrital zircon U–Pb geochronology from the fluvial-dominated Colton Formation in the western Uinta Basin (Utah, USA) to assess the system's provenance and evolution. Significant differences in zircon age populations between the Colton Formation and the overlying Green River Formation suggest a reorganisation of the source-to-sink system during the transition between the two lithostratigraphic units. Notably, detrital zircon age spectra are not homogeneous across the Colton Formation, therefore physical morphometric parameters were used to verify the possible influence of selective bias during sediment transport. These data reveal that a relatively finer-grained population of Precambrian, and to a less extent Mesozoic, zircon grains were affected by hydraulic sorting during transport, resulting in a greater relative abundance of older zircon grains in the distal reaches of the distributive fluvial system, whose basinward decrease in competence would have increased the relative proportion of finer zircon fractions in sandstones. Furthermore, there are different trends in the distributions of zircon age populations relative to their stratigraphic position, highlighting the complex architecture of the fluvial palaeo-fan. The spatial and stratigraphic variability of provenance signals in fluvial-fan successions must be carefully evaluated to improve the reliability of source-to-sink models and palaeodrainage reconstructions, as autogenically controlled noise can be generated during the dispersal of detrital zircon in fluvial sedimentary systems.</p>","PeriodicalId":54144,"journal":{"name":"Depositional Record","volume":"11 2","pages":"511-536"},"PeriodicalIF":1.9,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dep2.316","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143846250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}