Depositional Record最新文献

{"title":"Geochemical evaluation of black limestones in the Early Cretaceous platform carbonates of Gümüşhane (NE Turkey): An insight into petroleum source rock potential and palaeoenvironment conditions","authors":"Çiğdem Saydam Eker,&nbsp;Uğur Volkan Arı,&nbsp;Selçuk Alemdağ","doi":"10.1002/dep2.70012","DOIUrl":"https://doi.org/10.1002/dep2.70012","url":null,"abstract":"<p>This study assesses the organic matter (OM) content, kerogen type, maturity, depositional environment conditions and sedimentation model of Early Cretaceous (Berriasian–Aptian) black limestones in NE Turkey using geochemical analyses, including Rock-Eval/total organic carbon (TOC), gas chromatography–mass spectrometry, gas chromatography, major and trace elements and stable carbon isotope of OM measurements. The investigated black limestones' TOC, hydrogen index and potential yield values range from 0.07 to 2.91 wt%, 76 to 636 mg HC/g TOC and 0.15 to 11.17 mg HC/g rock, respectively. These results indicate that the examined limestones have variable source rock potential, ranging from low to high. <i>T</i>_max values, calculated saturated biomarkers and aromatic components suggest that the OM contained in the black limestones varies between thermally immature and mature, consistent with the potential index values. The OM found in the black limestone contained kerogen varying between type I and III. It is a composition of marine and terrigenous OM, as shown by the δ¹³C isotope values, biomarker components and <i>n</i>-alkane distributions and their parameters. This OM was deposited in a salinity water environment with marine–terrigenous (transitional) surroundings under oxic, suboxic to anoxic and arid–hot climate conditions. These findings provide critical insights for assessing the hydrocarbon potential of carbonate platforms in similar geological settings.</p>","PeriodicalId":54144,"journal":{"name":"Depositional Record","volume":"11 3","pages":"917-953"},"PeriodicalIF":1.9,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dep2.70012","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144292788","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":"Shifting baselines of coral-reef species composition from the Late Pleistocene to the present in the Florida Keys","authors":"Lauren T. Toth,&nbsp;Anastasios Stathakopoulos,&nbsp;Scarlette Hsia,&nbsp;David Weinstein","doi":"10.1002/dep2.70009","DOIUrl":"https://doi.org/10.1002/dep2.70009","url":null,"abstract":"<p>The ongoing global-scale reassembly of modern coral reefs is unprecedented compared with the observed stability of most late Quaternary reef assemblages. One notable exception is the marine isotope stage (MIS) 5e (<i>ca</i> 130–116 thousand years ago [ka]) reefs in the Florida Keys, where the ubiquitous shallow-water coral, <i>Acropora palmata</i>, was near absent. Little is known, however, about reefs that grew during MIS5d–a (<i>ca</i> 116–74 ka), between MIS5e and the Holocene. It is therefore unclear whether Florida's unique MIS5e coral assemblages represent a geologically brief anomaly or a more persistent departure from the western Atlantic coral-reef archetype. We addressed that question by reconstructing the composition of MIS5d–a reefs within 29 coral-reef cores collected throughout the Florida Keys. We then compared the relative composition of corals during MIS5d–a to existing datasets from MIS5e, Holocene and modern (1996 and 2022) reefs to evaluate how far today's reef assemblages have diverged from geological baselines. We show that although the proportion of reef frameworks built by corals was remarkably consistent (<i>ca</i> 38%), species composition changed significantly through time. <i>Acropora palmata</i> was rare throughout MIS5, which we hypothesise was due to greater cold-temperature stress in Florida's subtropical reefs compared with the more climatically stable tropics. In contrast, the massive reef-building coral, <i>Orbicella</i> spp., was regionally dominant throughout the late Quaternary, but has become increasingly rare on modern reefs. By 2022, reefs in the Florida Keys were characterised by a truly novel coral assemblage dominated by <i>Porites astreoides</i> and <i>Siderastrea siderea</i>. In many ways, Florida's reefs defy the concept of a natural baseline; instead, their most persistent characteristic since the Late Pleistocene is their uniqueness. Yet, as reefs are increasingly subjected to unprecedented levels of environmental change, the exceptions to what was normal in the past could, paradoxically, provide the best geological analogues for the future.</p>","PeriodicalId":54144,"journal":{"name":"Depositional Record","volume":"11 3","pages":"893-916"},"PeriodicalIF":1.9,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dep2.70009","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144292210","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":"Discovery of Late Holocene-aged Acropora palmata reefs in Dry Tortugas National Park, Florida, USA: The past as a key to the future?","authors":"Anastasios Stathakopoulos,&nbsp;Lauren T. Toth,&nbsp;Alexander B. Modys,&nbsp;Selena A. Johnson,&nbsp;Ilsa B. Kuffner","doi":"10.1002/dep2.70005","DOIUrl":"https://doi.org/10.1002/dep2.70005","url":null,"abstract":"<p>Emblematic of global coral-reef ecosystem decline, the coral ecosystem-engineer <i>Acropora palmata</i> is now rare throughout much of the western Atlantic. Understanding when and where this foundation species occurred during the past can provide information about the environmental limits defining its distribution through space and time. In this paper, the present, historical and newly dated geological records of <i>A. palmata</i> are compared to reveal novel insights into the environmental constraints on its occurrence in Dry Tortugas National Park, a subtropical reef system at the south-western terminus of the Florida reef tract. Although past geological investigation found little evidence of the species in the park, a single, moderately sized <i>A. palmata</i> reef existed throughout historical times (1881 Common Era [CE] to present day; ‘historical population’, termed herein). Over the last 140 years, repeated population declines occurred with little to no recovery, culminating in the extirpation of <i>A. palmata</i> from the area during the 2023–2024 CE global coral bleaching event. Reported here for the first time is a significant record of Late Holocene <i>A. palmata</i> populations that existed from <i>ca</i> 4500 to 375 years before present (‘Late Holocene population,’ termed herein) in three broadly distributed areas of the shallow Dry Tortugas platform. This discovery challenges previous assumptions regarding the species' limited contribution to reef development in the area by providing data that extend the known spatial and stratigraphic extent of Holocene populations in this location. It is posited that, although the Late Holocene climate largely suppressed regional reef development, the new records provide evidence for centennial-scale periods of more favourable and stable climate that allowed for short-term expansions of <i>A. palmata</i> populations in the Dry Tortugas. In conclusion, the species' prospects for future success in this and other subtropical locations is discussed given the observed global trends of increasing sea-surface temperatures.</p>","PeriodicalId":54144,"journal":{"name":"Depositional Record","volume":"11 3","pages":"808-828"},"PeriodicalIF":1.9,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dep2.70005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144292646","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 first 25 years of satellite carbonate sedimentology: What have we learned?","authors":"James G. Acker,&nbsp;R. Jude Wilber","doi":"10.1002/dep2.70014","DOIUrl":"https://doi.org/10.1002/dep2.70014","url":null,"abstract":"<p>Earth observing satellites offer a way of viewing large-scale, high-volume transport events (storms) in global carbonate systems as well as monitoring the quiescent intervals between events. In particular, the processes leading to the facies transitions seen from bank top to deep slope are revealed in a way not seen before. In this paper we provide, for the first time, a comprehensive discussion on the large-scale transport processes dominating this interval in examples from the western Tropical Atlantic, the northern shelf of Australia and the carbonate plateaus of the Coral Sea. Our findings indicate that (a) tropical cyclones are the dominant transport mechanism that transports carbonate sediments to the deep sea, particularly fine-grained sediments; (b) the largest carbonate sediment transport events occur when tropical cyclones interact with shallow carbonate shelves; and (c) sufficient observations have taken place in this period to allow the compilation of preliminary regional climatologies to estimate storm impact and frequency. The recently achieved unprecedented current state of satellite remote sensing, combined with focused research efforts, can enable markedly improved quantification of this important aspect of oceanic carbonate production, deposition and dissolution.</p>","PeriodicalId":54144,"journal":{"name":"Depositional Record","volume":"11 3","pages":"975-997"},"PeriodicalIF":1.9,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dep2.70014","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144292647","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":"Gomes et al. (2024) Early diagenetic evolution based on petrography and stable isotope analysis in the Barra Velha formation of the Brazilian Pre-Salt, The Depositional Record","authors":"André L. S. Pestilho,&nbsp;R. Agustin Mors","doi":"10.1002/dep2.70011","DOIUrl":"https://doi.org/10.1002/dep2.70011","url":null,"abstract":"&lt;p&gt;In their recent paper, Gomes et al. (&lt;span&gt;2024&lt;/span&gt;) offer a detailed analysis of the mineralogical and diagenetic characteristics of the Aptian Pre-Salt in the Santos Basin. While their work enhances understanding of the Barra Velha formation (BVF), key aspects, especially the genesis and sequence of dolomite phases, require further discussion. This comment addresses their interpretations of dolomite formation, diagenetic timing and isotopic signatures, proposing alternative perspectives to improve comprehension of diagenetic processes.&lt;/p&gt;&lt;p&gt;All the dolomite described by Gomes et al. (&lt;span&gt;2024&lt;/span&gt;) has been interpreted as an early diagenetic phase, formed prior to the deposition of the salt layer. This includes what the authors identify as ‘saddle dolomite’ (SD). In thin section, SD is typically characterised by its curved crystal faces, curved cleavage planes and undulose extinction (Warren, &lt;span&gt;2000&lt;/span&gt;). However, undulose extinction alone is not a definitive criterion for identifying SD, as it can also occur in other dolomite types, such as nonplanar replacive dolomite, which may exhibit curved boundaries without the presence of curved cleavage planes (Warren, &lt;span&gt;2000&lt;/span&gt;). In Gomes et al. (&lt;span&gt;2024&lt;/span&gt;), figure 4D (‘saddle dolomite cementation’; Figure 1A) and figure 4H (‘saddle dolomite overgrowth’; Figure 1B) show examples of ‘saddle dolomite’ that lack curved cleavages and distinct curved boundaries. Instead, these examples display only faint curved outlines, especially in the reduced size images. These examples differ from the commonly reported SD in the literature (e.g. Figure 1C–F). Indeed, in the supplementary materials the authors have mentioned post-compactional SD, but they did not present any pictures. In their more detailed characterisation of pre-compactional ‘saddle dolomite’, they only mentioned a fibrous aspect, forming a ‘fringe’ around rhombohedral dolomite, although these characteristics are not distinctive of SD (Warren, &lt;span&gt;2000&lt;/span&gt;).&lt;/p&gt;&lt;p&gt;In brief, based on the images presented in Gomes et al. (&lt;span&gt;2024&lt;/span&gt;), we suggest an alternative interpretation for authigenic phases: figure 4D displays poor resolution to certainly determine ‘saddle dolomite’ and the mentioned red square does not seem to match the same fabrics shown in figure 4E,F; figure 4H—the ‘saddle dolomite’ overgrowth—represents just a carbonate overgrowth, with no clear indication of its composition or any of the distinctive petrographic characteristics of SD.&lt;/p&gt;&lt;p&gt;Gomes et al. (&lt;span&gt;2024&lt;/span&gt;) focus exclusively on the early diagenetic history, omitting any discussion of the late diagenetic record of the Santos Basin. Previous studies have described both the early and late diagenetic histories of the Aptian section in the Pre-Salt layers of the Santos (Carvalho et al., &lt;span&gt;2022&lt;/span&gt;) and Campos basins (Lima et al., &lt;span&gt;2020&lt;/span&gt;; Lima &amp; De Ros, &lt;span&gt;2019&lt;/span&gt;; Strugale et al., &lt;span&gt;2025&lt;/span&gt;). Despi","PeriodicalId":54144,"journal":{"name":"Depositional Record","volume":"11 3","pages":"998-1001"},"PeriodicalIF":1.9,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dep2.70011","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144292507","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":"Nature, origin and significance of a clayey cave deposit: Relationship between karst and Oligocene/Miocene tephra (NW Dinarides)","authors":"Nadja Zupan Hajna,&nbsp;Pavel Bosák,&nbsp;Andrej Mihevc,&nbsp;Michał Banaś,&nbsp;Jiří Filip,&nbsp;Lukáš Krmíček,&nbsp;Lenka Lisá,&nbsp;Šárka Matoušková,&nbsp;Jan Rohovec,&nbsp;Roman Skála,&nbsp;Jiří Sláma,&nbsp;Martin Šťastný,&nbsp;Jaromír Ulrych","doi":"10.1002/dep2.70013","DOIUrl":"https://doi.org/10.1002/dep2.70013","url":null,"abstract":"<p>A limestone cave filled with montmorillonite clay was found in a hill above the karst plateau on the north-eastern edge of the Adriatic Sea. The cave fill shows no correlation with sediments found in the surrounding caves or other known caves of the Classical Karst, where montmorillonite content is negligible. In other caves, the primary deposited sediments originate from weathered Eocene flysch and were transported into caves by sinking streams. Powder X-ray diffraction analyses indicate a pure montmorillonite composition with a few coarser quartz grains and heavy minerals. Based on these results and comparisons with tephras from volcanic centres in the wider region, we conclude that the geochemical characteristics of the montmorillonite clay (rare earth element distribution, enriched patterns of light rare earth elements, LaN/YbN ratios and significantly negative Eu/Eu* ratio) are similar to weathered volcanoclastic material of the Smrekovec Volcanic Complex (Oligocene to Miocene eruptions in north-eastern Slovenia) and transported to the depositional centre by north-eastern winds. Dating the clay using apatite fission-track thermochronology yielded 22 ± 7 Ma, while K-Ar dating gave 23.4 ± 1.7 Ma. Both ages are consistent with the activity of the Smrekovec Volcanic Centre, previously dated to 28–23 Ma. The presence of weathered volcanic ash in the studied cave indicates considerable explosive activity of the stratovolcano, previously interpreted only as a submarine edifice, and confirms the existence of a contemporary karst landscape at the time of volcanic activity where volcanic ash was deposited and subsequently in situ weathered in a levelled corrosion-tectonic plane. Consequently, it can be concluded that a karst landscape in the north-western Dinarides has existed since the Late Oligocene, with the studied cave being the only known remnant identified so far. This study presents a rare sedimentary record and highlights the role of karst landscapes as valuable archives of past geological events and environmental changes.</p>","PeriodicalId":54144,"journal":{"name":"Depositional Record","volume":"11 3","pages":"954-974"},"PeriodicalIF":1.9,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dep2.70013","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144292733","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":"Lacustrine and fan-delta sediments in syn-rift lake basins","authors":"Qianyou Wang,&nbsp;Yaohua Li,&nbsp;Hamed Sanei,&nbsp;Joe Gardner,&nbsp;Arka Rudra,&nbsp;James E. P. Utley,&nbsp;Richard H. Worden","doi":"10.1002/dep2.70010","DOIUrl":"https://doi.org/10.1002/dep2.70010","url":null,"abstract":"<p>Lakes are sensitive indicators of the balance between accommodation and sediment supply, recording high-resolution changes in palaeoenvironmental conditions. Long-lived rift lake basins, however, are predominantly controlled by episodic accommodation changes and pronounced basinward facies shifts, complicating the generalisation of tectonic and climatic controls on rift lake successions. This study proposes a sequence framework and depositional pattern for asymmetric half-grabens in syn-rift lake basins by characterising the lacustrine fan-delta deposits of the Lower Cretaceous Shahezi Formation in the Songliao Basin. Detailed sedimentologic and petrographic analyses identified 24 lithofacies categorised into seven facies associations. A sequence stratigraphic framework was constructed to outline the tectono-stratigraphic evolution during the syn-rift phase. The results indicate that the syn-rift Lishu palaeo-lake is characterised by its relatively small size, steep slopes, poorly developed and siliciclastic-dominant shoreline strata and significant input of allochthonous biodetritus. The syn-rift deposits show a distinct threefold conglomerate–sandstone–mudstone motif, with a complete cycle comprising a prolonged retrogradational phase (LST and TST) and a brief progradational phase (HST). Basin-bounding faults accelerated hinterland erosion and increased sediment feeder system slopes by rotating hangingwall blocks; consequently, rapid sediment transport and localised gravitational collapse caused the common occurrence of soft-sediment deformation structures and sublacustrine fan conglomerates. The substantial increase in accommodation space, resulting from fault-generated subsidence, triggered lake expansion and further contributed to the development of transgressive system tracts and continuous mudstone deposition. These mudstones, rich in terrigenous organic matter and allochthonous fossils, correlate with carbonaceous mudstones, coals and conglomeratic sandstones in proximal overfilled sections, indicating a dynamic interplay between fan delta progradation and Lake Shoreline transgressions. This study proposes a depositional model within a sequence stratigraphic framework for non-marine sediment accumulation in asymmetric half-grabens bounded by active faults. The findings offer insights that complement existing models developed for marine rift systems.</p>","PeriodicalId":54144,"journal":{"name":"Depositional Record","volume":"11 3","pages":"857-892"},"PeriodicalIF":1.9,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dep2.70010","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144292732","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":"Reply to the discussion and comments of Pestilho, A.L.S. and Mors, R.A. (2025) on the paper by Gomes et al. (2024). Early diagenetic evolution based on petrography and stable isotope analysis in the Barra Velha Formation of the Brazilian Pre-salt. The Depositional Record, 1–25. https://doi.org/10.1002/dep2.288","authors":"João Paulo Borges Gomes,&nbsp;Rodrigo Brandão Bunevich,&nbsp;Ana Carolina Leonel Sartorato,&nbsp;Leonardo Ribeiro Tedeschi,&nbsp;Sandra Nellis Tonietto,&nbsp;Maurice Edwin Tucker,&nbsp;Fiona Whitaker","doi":"10.1002/dep2.70003","DOIUrl":"https://doi.org/10.1002/dep2.70003","url":null,"abstract":"<p>We very much appreciate the comments of André; Pestilho and Agustin Mors on our paper discussing the early diagenesis of the Pre-salt carbonates (Barra Velha Formation, BVF) in the Santos Basin (Gomes et al., 2024). We welcome the opportunity to respond and to clarify our interpretations concerning dolomite formation, diagenetic timing and isotopic signatures supported by additional examples.</p>","PeriodicalId":54144,"journal":{"name":"Depositional Record","volume":"11 3","pages":"1002-1006"},"PeriodicalIF":1.9,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dep2.70003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144292728","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 role of refluxing deep hypersaline brines and evaporite precipitation dynamics in the Castile Formation and marginal carbonate strata (Delaware Basin, USA)","authors":"Ander Martinez-Doñate,&nbsp;Lorena Moscardelli,&nbsp;Lucy Tingwei Ko,&nbsp;Leandro Melani,&nbsp;C. Nur Schuba,&nbsp;Priyanka Periwal,&nbsp;Shuvajit Bhattacharya","doi":"10.1002/dep2.70006","DOIUrl":"https://doi.org/10.1002/dep2.70006","url":null,"abstract":"<p>The Upper Permian Castile Formation of the Delaware Basin is a 515.3 m (1690.6 ft) thick deep-water laminated evaporitic sequence dominated by anhydrite and halite. This formation seals hydrocarbon reservoirs and produced-water injection targets, and holds potential for salt cavern development due to its halite-bearing intervals. This study presents a sedimentological characterisation of two cores from the basin's centre and margin, complemented by a suite of petrographic and geochemical analyses, including X-ray diffraction, scanning electron microscopy, energy-dispersive spectroscopy, inductively coupled plasma mass spectrometry for halides and X-ray fluorescence for sulphates. These analyses facilitated evaporite characterisation and helped to establish a threefold hierarchical scheme (laminite, cycle, member) and advanced understanding of halite precipitation dynamics in deep brines. Additionally, intense dolomitisation and pore-filling sulphates were examined along the older carbonate margin, linking these processes to deep-water brine reflux events of varying ages and salinities. Pre-Castile dolomitisation enhanced permeability along the marginal strata, allowing the reflux of hypersaline deep brines outside the basin. This reflux promoted sulphate precipitation in porous dolostones along the margins (anhydritisation), leading to prolonged sulphate precipitation stages within the basin. Once marginal porosity was occluded, brine confinement led to further salinity increases, driving episodic halite deposition and producing five anhydrite–halite members. Based on this study, it is possible to conclude that dynamic deep hypersaline brines significantly influence sedimentary and diagenetic processes in the basin and its margins. Dynamic deep hypersaline brines are key in influencing sedimentary and diagenetic processes in the basin and its margins.</p>","PeriodicalId":54144,"journal":{"name":"Depositional Record","volume":"11 3","pages":"829-856"},"PeriodicalIF":1.9,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dep2.70006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144292033","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":"Two types of modern sediment dispersal systems in the western Taiwan foreland basin: Sediment transfer from basin to basin","authors":"Cheng-Shing Chiang,&nbsp;Kan-Hsi Hsiung,&nbsp;Ho-Shing Yu","doi":"10.1002/dep2.70007","DOIUrl":"https://doi.org/10.1002/dep2.70007","url":null,"abstract":"<p>The western Taiwan foreland basin (WTFB) is a classical peripheral foreland basin longitudinally bounded by the East China Sea (ECS) to the north and the South China Sea (SCS) to the south. Sediments spill longitudinally into the nearby marginal ocean basins, similar to the typical foreland basin setting. Due to oblique collision in the Taiwan region, the WTFB has evolved into two subbasins: a mature basin dominated by fluvial sediments in central-northern Taiwan and an immature one dominated by deep marine facies offshore south-western Taiwan, accompanied by two distinct sediment routing systems. In the north, the Choushui River drainage, narrow seaway of the Taiwan Strait, Huapingshu Channel/Mienhua Canyon System and southern Okinawa Trough (SOT) are integrated into a united sediment dispersal system, allowing sediments sourced by the mature basin to laterally overflow into the ECS and be deposited into the SOT. In southern Taiwan, the Kaoping River drainage, Kaoping submarine canyon, Penghu submarine canyon, deep-sea Penghu Channel and SCS basin interconnect, forming a longitudinal dispersal system for sediments mainly derived from the southern Taiwan orogen to be longitudinally transported to the northern SCS basin and the northernmost Manila Trench. The oblique collision between the Luzon Arc and the Chinese margin in the Taiwan region is the major factor in the development of two distinct sediment dispersal systems. Preferential sediment transport (axial vs. transverse), shelf width and sea-level change since the Last Glacial Maximum (~2 ka BP) are the other significant factors in the development of sediment routing systems in the WTFB. The two proposed distinct sediment dispersal systems in the WTFB clearly demonstrate how foreland basin sediments can be transferred longitudinally to adjacent marginal sea basins. Moreover, the sediment dispersal systems in the WTFB can be considered a modern analogue for interpreting ancient counterparts.</p>","PeriodicalId":54144,"journal":{"name":"Depositional Record","volume":"11 3","pages":"790-807"},"PeriodicalIF":1.9,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dep2.70007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144292039","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}